Troubleshooting Guide C1060 [PDF]

Zitiervorschau

TROUBLESHOOTING GUIDE

C1070/C1070P/C1060/C71hc C1060L

2016.3 Ver.2.0

PP support div.

Table of contents To correct trouble 1. Image quality 1.1 Spot 1.1.1 Cyclic white spot/black spot ---------------------------------------------------------------------------------- 4 1.1.2 Color Spots due to soilage inside machine --------------------------------------------------------------- 5 1.1.3 Color Spots (black spots) ------------------------------------------------------------------------------------- 9 1.1.4 White Spot due to the developing leakage (foreign material) --------------------------------------- 11 1.1.5 White dots from 2nd transfer unit --------------------------------------------------------------------------12 1.1.6 First thing in the morning, Attachment of white dusts like a eraser shaving on the paper ttachment of white dusts ---------------------------------------------------------------------------------------------13

1.2 Line/Band 1.2.1 Line and uneven density countermeasure flow ---------------------------------------------------------15 1.2.2 White lines (to sub-scan direction) ------------------------------------------------------------------------18 1.2.3 Gloss line caused by fusing paper exit roller ------------------------------------------------------------20 1.2.4 Banding in the main scan direction on halftone image printed on thick paper (Jitter problem) -------------------------------------------------------------------------------------------------------- 21 1.2.5 Line like ripple on image -------------------------------------------------------------------------------------24 1.2.6 Waste toner packin ------------------------------------------------------------------------------------------25 1.2.7 Darker image up to 44mm from leading edge or after 53mm from white area (Developing memory) -----------------------------------------------------------------------------------------------26 1.2.8 Lines or banding to the main scan direction (CD) due to speed difference between 2nd transfer and fusing -------------------------------------------------------------------------------27 1.2.9 Image got blurred affected by ozone (cyclic white band) -------------------------------------------29 1.2.10 Photoconductor (Drum) memory ------------------------------------------------------------------------30 1.2.11 Developing screw mark ----------------------------------------------------------------------------------32 1.2.12 Lines or banding on image due to speed change (shock noise) --------------------------------35 1.2.13 Developing roller (44mm) cycle banding (different density) --------------------------------------44 1.2.14 Irregular darker or lighter density band appears after leaving machine under high humidity environment ------------------------------------------------------------------------------------------------------------45 1.2.15 Jittering lines at trailing edge ----------------------------------------------------------------------------46 1.2.16 8mm interval FD lines -------------------------------------------------------------------------------------47 1.2.17 Density change by static electricity ---------------------------------------------------------------------48 1.2.18 FD Lines and Banding -------------------------------------------------------------------------------------50 1.2.19 5mm cycle density difference caused by the fusing unit ------------------------------------------53 1.2.20 Color lines in CD at 13mm from the leading edge --------------------------------------------------54 1.2.21 White line due to separation claw mark ---------------------------------------------------------------56 1.2.22 Gloss band in CD with margin width -------------------------------------------------------------------57 1.2.23 Image lacks at the corner of the trailing edge (Soilage in main scan direction (CD) -------59

1.3 Others 1.3.1 Image after white part becomes darker (Developing ghost) ---------------------------------------60 1.3.2 Darker at the trailing edge of image -----------------------------------------------------------------------62 1.3.3 Background or toner scattering after continuous low coverage ------------------------------------63 1.3.4 How to maintain consistent color during continuous printing ----------------------------------------64 1.3.5 Small blank area or color registration error ------------------------------------------------------------66 1.3.6 Too high gloss -------------------------------------------------------------------------------------------------68 1.3.7 Rough image on the 1st side of duplex -----------------------------------------------------------------70 1.3.8 White or color banding at thick paper leading and trailing edges ---------------------------------71 1.3.9 C-2451, C-2452, C-2453 or C-2454, Low toner density --------------------------------------------73 1.3.10 Poor transfer at image front ------------------------------------------------------------------------------74 1.3.11 Prevention of the backside soilage ---------------------------------------------------------------------76 1.3.12 Fainted outline, darker at edge --------------------------------------------------------------------------77 1.3.13 Image bacground under high temperature -----------------------------------------------------------78 1.3.14 Backside image soilage -----------------------------------------------------------------------------------79

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1.3.15 Toner is not cleaned at the edge of the transfer belt -----------------------------------------------81 1.3.16 TransferabilityatFeedingEmbossPaper ----------------------------------------------------------------83 1.3.17 Image density is lighter on uncoated paper (rough paper) ---------------------------------------86 1.3.18 Gloss memory -----------------------------------------------------------------------------------------------90 1.3.19 Center of line gets broken --------------------------------------------------------------------------------91 1.3.20 Secondary color text scatters ----------------------------------------------------------------------------92 1.3.21 Image offset caused by fusing unit ---------------------------------------------------------------------94 1.3.22 Toner band control setting ------------------------------------------------------------------------------ 100

2 Paper conveyance failure 2.1 Others 2.1.1 Paper waving ------------------------------------------------------------------------------------------------- 103 2.1.2 Setting for OHP sheet printing ---------------------------------------------------------------------------- 104 2.1.3 Trailing edge skews ----------------------------------------------------------------------------------------- 105 2.1.4 Printed paper curls (without RU connection) ---------------------------------------------------------- 106 2.1.5 Fusing wrapping jam ---------------------------------------------------------------------------------------- 108 2.1.6 No feed jam (J-1101/J-1201) ------------------------------------------------------------------------------ 111 2.1.7 Dents on paper at 48mm cycle in FD ------------------------------------------------------------------- 114 2.1.8 Centering error (±5 mm or more) ------------------------------------------------------------------------ 116 2.1.9 Paper stick with each other due to static electricity ------------------------------------------------- 119 2.1.10 Static Sticking in Options --------------------------------------------------------------------------------- 124 2.1.11 Paper removing procedure on fusing wrap up JAM ----------------------------------------------- 127 2.1.12 J-3102 Thin paper feed failure at the 2nd transfer unit ------------------------------------------- 130 2.1.13 Paper wrinkle at duplex printing ------------------------------------------------------------------------ 133 2.1.14 J-3201 paper is caught by the fusing separation claw -------------------------------------------- 134 2.1.15 Corner folding at the paper leading edge, machine front side ---------------------------------- 135 2.1.16 Pickup jam clearance workflow ------------------------------------------------------------------------- 137

3 Machine Troubles 3.1 Control 3.1.1 Printer gamma offset automatic adjustment does not complete normally after trying several times --------------------------------------------------------------------------------------------------------- 157 3.1.2 Print job is not accepted while machine indicates dehumidifying --------------------------------- 158 3.1.3 Notes of updating the FW from earlier than ver1.5 (Scan Address/E-mail Title & Text) ----- 159 3.2 Error code 3.2.1 C-2451, C-2452, C-2453 and C-2454 occur ----------------------------------------------------------- 162 3.2.2 C-3102 ADU wiring connector is disconnected -------------------------------------------------------- 163 3.2.3 C-4521, color registration unit is not positioned correctly ------------------------------------------- 166 3.2.4 C-2455,C-2456､C-2457,C-2458 Toner density abnormality (high density) occur ------------- 169 3.3 Others 3.3.1 Options cannot be recognized. System configuration display without options ----------------- 170 3.3.2 How to eject developer -------------------------------------------------------------------------------------- 171 3.3.3 Image shift ------------------------------------------------------------------------------------------------------ 173 3.3.4 Hard to pull out process mount ---------------------------------------------------------------------------- 175 3.3.5 Note for the developing shutter installation work ------------------------------------------------------ 178 3.3.6 Productivity decrease at first in the morning under low temperature, low humidity ----------- 180 3.3.7 Release of productivity down mode for small size print under high temperature ------------- 181 3.3.8 ADU MT lever is very hard to release -------------------------------------------------------------------- 183

4 Options 4.1 PF-707 4.1.1 Multi-feed of Plain Fine paper under high temperature and high humidity --------------------- 185 4.1.2 PF-707 Wrinkle on paper ----------------------------------------------------------------------------------- 186 4.1.3 PF-707 Paper skew of small size ------------------------------------------------------------------------- 187

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4.1.4 PF-707 Corner fold (dog ear) and conveyance JAM of small size -------------------------------- 190 4.2 PF-602m 4.2.1 J-1710 countermeasure ------------------------------------------------------------------------------------- 191 4.2 FS-532 4.3.1 Irregular correspondence of the main tray exit -------------------------------------------------------- 200

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1.1.1. Cyclic white spot/black spot (1) Symptom White spot/black spot repeatedly occurs at a certain cycle. (2) Cause • Drum unit Approx. 188mm cycle in a single color • Developing unit Approx. 44mm cycle in a single color • Intermediate transfer belt Approx. 861mm interval. • 1st transfer roller Approx 69mm interval • Opposing roller (?) Approx 75mm interval • 2nd transfer roller Approx. 75mm interval. • Fusing belt Approx. 311mm interval. On simplex printing, the symptom occurs on 1st side.

3.

Solution After specifying the problem parts, clean and replace the subject parts.

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1.1.2. Color Spots due to soilage inside machine (1) Symptom After pulling out the process mount and re-install it, color spots appear at the leading edge on the first ten prints.

(2) Cause While pulling out the process mount, developer and toner coming out from the toner entrance and toner exit of the developing unit. It drops on the paper path, attaching to the paper and resulting in the color spots.

Toner exit

Toner supply opening

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(3) Solutions 1. Check the condition of toner filter box (A50UR70A) at machine left bottom. When the toner attaches too much, replace the toner filter box (Fig. 1). Then, clean following 3 locations; ● The process mount where the developing unit is installed (Fig. 2) ● Exhausting duct mouth at inside machine at machine rear (Fig. 3) ● Drum unit stay (Fig. 4). Note ● Once toner spills, when process mount is pulled out and push back, the charging corona may be soiled. To prevent that, remove all the charging coronas before pulling out the process mount. ● Do not expose the drum to the light.



Fig 1: Toner filter box, at machine rear left bottom

Fig 2 Process mount

Drum cartridge stay

Fig. 4 Drum unit

Fig. 3 Where to clean (inside machine) 2.

Check whether the transfer belt cleaning unit (A50UR706) and nearby area and separation claw unit gets soiled. If it is soiled too much, clean it or replace it.

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Transfer belt cleaning unit

Separation claw unit 3.

Check whether IDC sensor unit upper and main body ceiling gets soiled. much, clean it.

If it is soiled too

Color registration unit

Main body ceiling 4.

Clean the toner at the paper path Clean the positions A, B and C with cloth (or vacuum cleaner if it is soiled too much) to (←○→) arrowed direction Note • Should not wipe to (←×→) direction because toner falls.

A. Transfer guide plate/Lw B. Paper path steel plate 1

○

C. Paper path steel plate 2

×

5.

Clean the separation discharge unit with the blower brush. Clean the transfer guide plate /Up. Note • When cleaning the black sheet attached to the upper guide of 2nd transfer section of paper path, gently wipe it. Never rub firmly. If it is too dirty, replace it. When the black sheet gets torn or wavy, line or banding appear on image. • When cleaning separation discharge plate ASSY, do not touch the top of needle. If the needle got bent or broken, thin paper separation failure or line may occur.

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Separation discharge plate unit Black sheet

If the soilage still remains, remove the unit and conduct cleaning mentioned in the roller replacement procedure. 6.

After cleaning, make 10 sheets of blank print in A3 to clean the paper path.

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1.1.3. Color spots (black spots) (1) Symptom Color spots (black spots) occurs

Yellowsoft softcakeing clumping Yelllow

Magenta soft clumping

Black carrier

For human eyes, all looks like black spots on the print. (2) Cause When the temperature is high or the internal temperature increases too much, the toner or carrier forms core. Around the core, transfer failure (1st transfer/2nd transfer) occurs and spots appear. How to classify the cause Print test chart No53 with the density setting 255 and 128. See the sample through the loupe with magnification x40 and look carefully the color spots. For example, the cause of color spots on the magenta halftone could be attachment of carrier of other color (Y/C/K) or toner (soft clumps). So please observe carefully. In many cases, some of the above is mixed. So, take corrective action from the frequently seen symptom. • For the carrier attachment, go to (Solution "1") • For the soft clumping, go to (Solution "2" or "3") (3) Solution 1. Confirm that the color of the core then conduct following for the responding color. 1. Conduct Background margin fine adjustment. Service mode→[Process Adjustment]→[Process Fine Adjustment]→[Background Margin Fine Adj.] Change the setting to minus direction by 1 to 4 steps. 2. Utility/Counter →[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[Front & Back Density] Change the value by 1 to 2 steps to minus direction. After changing the setting, conduct the Gamma Automatic Adjustment. Service mode →[Process Adjustment]→[Drum Peculiarity Adjustment]]→[Gamma Automatic Adjustment] 3. Check the maximum density and if it is different from target, conduct maximum density adjustment. Print 10 pcs of test chart No53 with the density setting 255 and 128, then see the improvement level. (Confirm the variance of the occurrence.) Note • Check that AC bias and AC frequency is set to “0”. • After replacing developer to new one, print A3 with 15 % coverage by 100 sheets. The lower the Duty, the better against the color spot. However it is disadvantageous against the developing memory problem. • Front & Back adjustment is disadvantageous against white spots. • It is impossible to completely solve the soft clumping or carrier attachment issue. However, if total 10 spots or over is seen in the entire A3 in solid or halftone, it can be

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improved. 2.

Toner issue (environment dependent) 1. Check the environment and use condition of the machine • Ambient temperature (The room temperature 30 degrees C and over is not allowed.) • Whether there was a occasion that internal cooling system did not function: JAM or SC during continuous print • Whether customer turn OFF main power switch just after completing printing daily. • Toner storage condition (exposed to sun-light etc) 2.

Conduct toner refresh mode and check whether ejecting soft clumps is effective. Number of times of Toner refresh: Twice If following condition(s) are applicable, conduct less than twice. • Coverage (Last 5000 prints) 3% or more, and less than 5% Once 5% or more None • Life of Transfer cleaning blade 50% or more Once → If this does not improve, go to “3. Toner issue (environment independent)”. If the symptom is improved, print 50 sheets of test chart No. 53 (with 255 setting) in the problem color on A3 to eject the soft clumping inside the developer for improvement.

3.

Toner issue (environment independent) Clean (or replace) toner supply, toner hopper section and toner conveyance path then replace developer.

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1.1.4. White Spot due to the developing leakage (foreign material) (1) Symptom White spots occur on the solid image. ← Paper feed direction

White spots due to the developing leakage

(2) Cause Foreign material which is conductive attaches to the surface of the developing roller and abnormal discharge occurs. A conductive foreign material attaches to the developing roller surface and is conveyed to the developing nipping part. Then, it is affected by the developing AC bias, abnormal discharge occurs against the photoconductor drum. This appears as white spots. (3) Solution While checking the image, reduce the value of the Develop AC Bias Fine Adj. Service Mode →[Process Adjustment]→[Process Fine Adjustment]→[Develop AC Bias Fine Adj.] When the setting is changed, conduct gamma automatic adjustment. Note: Background, uneven density or carrier attachment may occur. Therefore, check the image when changing the settings. Table of contents

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1.1.5. White dots from 2nd transfer unit (1) Symptom Many white dots in the diameter φ0.1 to 1mm occurred. (2) Cause While transferring toner from the belt to paper, the resistance difference due to the paper generates abnormal discharge on the paper at the transfer nip. At the discharge spot on the paper, the toner repels and white spots appear on print. (3) Solution (a) At tray setting, change the 2nd transfer output 1. Change the DIPSW 1-0 from 0 to 1 to show the process adjustment in the paper setting. [Service Mode] → [System Setting] →[Software DIPSW Setting] → DIPSW01-0:1 2. Change the 2nd transfer output corresponding to the symptom location. Machine → [Paper Setting] → [Change Set] → [Process Adj.] At 2nd Transfer output adjustment, change the value by every +10 and find the optimum value. Note: On the thick paper, the leading edge/trailing edge transfer output is stronger or weaker than the other part. To optimize the leading edge/trailing edge, adjust the 2nd Transfer-Lead Edge and 2nd Transfer-Rear Edge in the same screen. (b) Change 2nd transfer output in the administrator setting. When the administrator setting is used, the change is applied to all the output. If the adjustment of tray paper setting is used, the certain rate is added to the tray setting. [Utility/Counter] → [Administrator Setting] → [System Setting] → [Expert Adjustment] → [Process Adjustment] → [01 Front & Back Density] Check the symptom occurring side and adjust the value of the corresponding side; [2nd Transfer Front]] or [2nd Transfer Back]. Change the value by every - 10% find the optimum value. Note The transfer output at lead edge and trail edge is stronger/weaker than the other part. To optimize the leading edge/trailing edge setting, Like the step (a)-2, adjust the 2nd Transfer-Lead Edge and 2nd Transfer-Rear Edge in the same screen. (c) Change the 2nd transfer output adj. after changing the DIPSW to increase the 2nd transfer output range. [Service] →[System Setting] →[Software DIPSW] Setting→DIPSW27-5:1, DIPSW41-7:1 [Machine] →[Paper setting] →[Change Set] →[Process Adj.] At 2nd Transfer output adjustment, change the value by every +10 within the range 50 to 120 and find the optimum value. (d) Optimize paper state White dots is effect of the abnormal discharge of the paper. When the paper is exposed to the ambient air for days or left inside the PFU for days, the paper sometime gets dried depending on the ambient moisture. Then the symptom tends to occur easily. Try just unpacked paper. Table of contents

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1.1.6. First thing in the morning, Attachment of white dusts like a eraser shaving on the paper (1) Symptom

At the leading edge of the 1st print (to a few sheets later), around φ1mm size white or black dusts.

(2) Cause

The mixture of the wax in the toner and the paper powder attaches to the roller and conveyed to the paper. (3) Solution

1. At periodic cleaning or spot cleaning, clean the fusing paper exit roller. Pull out the ADU mount, open the reverse unit and clean the roller with the cleaning pad and drum cleaner. Caution The symptom tends to occur when the fusing unit is cool at the 1st in the morning. So cleaning before start printing is effective.

Rotate to arrowed direction gradually and clean the dusts from the surface of the roller.

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2. Replace "Fixing paper exit roller/Up" with "Fixing paper exit roller (A1DU7225)" of C7000 series.

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1.2.1 Line and uneven density countermeasure flow (1) How to distinguish the line problem and uneven density problem 1. Conduct the gamma auto adjustment [Service Mode]→[Process Adjustment]→[Drum Peculiarity Adj.]→[Auto gamma adjustment]→ [Adjustment]→[Execute Adjustment Operation]→[Auto Gamma Adj.] * Which method you take, there is no difference in operation. 2.

3.

Print the following test pattern using paper bigger than A3 size. • No.43. Use the Dot1 screen. • Select No.53, set the density of YMCK to 120 and print the 4 color gray. • Select No.58 and set the density of MCK to 120. Use the Dot1 screen. Check the print result of No.43, 53 and judge which of the following 4 patterns they apply. (a) There is line on image in the paper feed direction. (b) There is line on image crossing the paper feed direction (c) There is no line but uneven density on the entire paper. (d) Both line and uneven density can be seen.

(a) Line in the paper feed direction.

(b) Line crossing the paper feed direction.

Paper feed direction

(c) No line but uneven density entirely.

Paper feed direction

(d) Both line and uneven density exist.

Paper feed direction

Paper feed direction

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(2) Apply countermeasure per symptom (a) There is line on image in the paper feed direction Check Test pattern No.58, which was printed in Step1-(2). pattern [1] to [3] they apply.

Check which of the following

1

Feed direction 3

2 Apply countermeasure per pattern (a) When line is extended over the entire paper 1. Change 2nd transfer current ([Front & Back Density]) [Utility/Counter] → [Administrator Setting] → [System Setting] → [Expert Adjustment] → [Process Adjustment] → [Front & Back Density] Increase the setting value of the 2nd transfer by every 5% and check the image. If the symptom is not improved by increasing the value, try to reduce the value or change the 1st transfer value. 2.

Visually check the parts and replace a problem parts Parts Chart for judge Line type Cause White line Scratch Intermediate transfer Half tone belt Color line Filming Cleaning blade Half tone/ Solid Color line Toner not cleaned 2nd transfer roller/UP Half tone/ Solid Color line Scratch, Soilage 2nd transfer roller/L Half tone/ Solid Color line Scratch, Soilage Fusing belt Solid Gloss line Scratch Fusing roller/L Solid Gloss line Scratch Note Among color lines, for the mixed color line, check the cleaning section of intermediate transfer section. If the imperfect cleaning is confirmed, replace the intermediate transfer cleaning blade.

(b) When line is cut in each color Check whether the line of subject color is in dark color or void in white. Replace the probable failure parts. Parts Chart for judge Line type Cause Dev. unit Scratch, Foreign Half tone/ Solid White line (Dev. roller) material White/Color Attachment of DU Half tone/ Solid line lubricant material Charging unit Half tone/ Solid White line Dust (Dust proof glass) PH Half tone/ Solid White line Foreign material 1st transfer roller Half tone/ Solid White line Dust

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(c) No line on Test pattern No.58. Line may be caused by Y. Check that the line appears in the same position on both “Test pattern No.53 in Y=120, 255” and “4 color gray test pattern” which were previously printed. And also check that the line is in colored or in white. And then replace the probable failure parts of Y. Colored line: Drum cartridge, Charging corona unit White line: Charging corona unit

(b) There is line on image crossing the paper feed direction 1. Check Test pattern No.43, 53which was printed in Step(1)-2. Check the interval of line occurrence. 2. Apply countermeasure per occurrence interval. - In case of approx. 188mm pitch, scratch on the drum surface - In case of approx. 311mm pitch, scratch on the fusing upper belt - In case of approx. 44mm pitch, developing sleeve’s developer conveyance failure - In case of approx. 69mm pitch, scratch or soilage on the 1st transfer roller. - In case of approx. 75mm pitch, soilage of the 2nd transfer roller etc. Clean or replace the parts which are applicable to the pitch interval. (c) There is no line but uneven density on the entire paper 1. Conduct [Automatic Gamma Adjustment]. 2. Conduct [Color registration adjustment]. [Service mode]→[Machine Adjustment]→[Printer Adjustment]→ [Color Registration Adj.] → [Adjustment]→[Execute Adjust Operation]→[Color Registration Adj.] 3.

Conduct [Gamma offset adjustment] [Service mode]→[Machine Adjustment]→[Quality Adjustment]→[Printer Gamma Adjustment]→[Gamma offset adjustment] [Utility]→[Machine Admin. Setting]→[System Setting]→[Expert Adjustment]→[Quality adjustment]→[Printer Gamma Offset Adj.]

4.

Conduct [Density Balance Adjustment]. [Adjustment]→[Density Balance Adjustment] Refer to [Density Balance Adjustment].

(d) Both line and uneven density can be seen 1. Remove the causes of line by conducting the countermeasure for case A and B. 2. When the line became less visible, conduct the countermeasure for case C. Caution When replacing the failure parts, do not jump to replace with the brand new parts but try using the old parts attached to used machines. Upon knowing how the symptom is improved with the replacement, replace with the prepared new parts. If there is no improvement by replacing parts, consider other causes.

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1.2.2. White lines (to sub-scan direction) (1) Symptom

White lines to sub-scan direction (paper feeding direction)

Paper feeding direction (2) Cause (a) Line appears in single color • Charging caused line (drum potential failure) 1. When the toner soils charging grid, the grid potential control becomes poor. 2. Drum surface potential increases at the part corresponding to the soiled grid. 3. Though drum is exposed, the potential does not decrease and white line appears. • Developing unit caused line Check the bristle of developing unit of applicable color. If the line is seen in bristle, the cause is foreign material caught between developer regulating blade and unit. • Drum scratch caused line Photoconductor drum of matching color got damaged. (b) Sharp white line appears in single color • Foreign material in the laser beam path. Foreign material such as dust and toner attaches to the writing path and block laser light. It appears as line on image. (c) White line appears on black solid under high temperature and high humidity environment. • Soilage on 2nd transfer roller/Up When the 2nd transfer roller/Up is soiled, the resistance varies in feed direction. The line appears at the high resistance part because transfer ability becomes poor. (d) White line commonly appears on all colors • Soilage on 2nd transfer roller/Up • Transfer belt filming/scratch Filming tends to occur when low coverage or Feeding area of small size is frequently printed. Once the filming occurs on intermediate transfer belt, the resistance on the belt changes and poor transfer occurs. It appears as white line. (e) White band commonly appears on all colors • Transfer belt filming

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• Fusing belt shifting range (about 10mm) banding (3) Solution (a) Charging caused line (drum potential problem) 1. Clean charging grid. Use the non-woven fabric (hydro-wipe 65AA-9920). 2. Clean the charging wire with the cleaning material, equipped to the machine. 3. Replace the PH proof filter and Dust proof filters/1and 2 to new type. PH dust proof filter A50U168801 Developing dust proof filter/1 A50U168901 Developing dust proof filter/2 A50U169501 4. Change the charging corona. (b) Developing unit caused line 1. Clean the developing unit (between the developing roller and the guide plate) 2. Change the developer. 3. Change the developing unit. 4. Change the charging unit. (c) Drum scratch caused line (Scratch on the photoconductor drum of respective color) Change the drum unit. (d) Foreign material in the laser beam path Clean the soil and dust which blocks the light with unwoven fabric. (Especially, developing unit lower protruding part) (e) 2nd transfer roller/Up gets soiled 1. When 2nd transfer roller/ Up gets soiled, clean the 2nd transfer roller/Up with dry unwoven fabric. Note Do not use moisture because the line gets worse. Be sure to use dry fabric. 2. Increase density. [Paper setting]→[Change Set]→[Process Adj.]→[Dens. Adj. Per Tray] 3. If the symptom is not solved, replace the part. (f) Transfer belt filming Conduct Belt refresh mode (Maximum one time). By one operation, A3x 5 sheets equivalent toner is consumed for cyan and magenta. [Machine]→ [Adjustment]→[Execute Adjust Operation]→[Belt Refresh mode] Note Do not perform toner refresh mode and belt refresh mode over set times. Otherwise, problem such as cleaning failure may occur. (g) Fusing belt shifting range banding Fusing belt may get marks from previous papers. If the banding is not the density level but the gloss difference corresponding to the small size paper edge, replace the fusing belt.

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1.2.3. Gloss line caused by fusing paper exit roller (1) Symptom When printing the high coverage original, gloss line may occur on image. (2) Cause When paper passes through the fusing unit, the fusing paper exit roller and the paper surface contact each other, which lowers the temperature of contacting area. The difference of gloss level between contacting area and non-contacting area causes gloss lines. (3) Solution 1. Change pressure of the fusing paper exit roller Change pressure of the fusing paper exit roller to release position.

Default Pressure

Release

Knob Note • Be sure to align the knob with the mark. Do not set to unmarked position. • When releasing the fusing paper exit roller, if the length of conveyance direction (FD) is shorter than A4, paper cannot feed. However, 4 imposing postal card can feed. 2.

Change of fusing temperature If the symptom is not improved enough by performing “1”, lower the fusing temperature as follows. Change DipSW1-0 to 1 to display process adjustment in Paper Setting. [Paper Setting]→[Change Set]→[Process Adj]→[Upper Fusing Roller Temperature] When changing the temperature, reduce by 10°C for the first step. If not enough, gradually decrease (maximum by 20°C). Print 20 sets of test pattern No. 69, and confirm that fusing under does not occur.

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1.2.4. Banding in the main scan direction on halftone image printed on thick paper(Jitter problem) (1) Symptom When printing halftone image on the thick paper, banding may appear at the 104mm and the 208mm from the leading edge of paper. *Banding mainly appears when using paper weighting 300gsm or more. Affected by the thickness and stiffness of paper, banding may appear in paper weighting less than 300gsm.

208mm

Feed direction

104mm

(2) Cause Vibration generated when thick paper hitting the entrance When thick paper hits the 2nd transfer section entrance, slight vibration is generated. It is conveyed to the photoconductor drum through the intermediate transfer section. Consequently, the image written on the drum at the instant reflects the vibration and white banding appears. The distance between the 2nd transfer section and the drum writing position are 104mm and 208mm. (Refer to the figure below)

208mm Laser write position

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(3) Solution 1. Change DipSW1-0 to 1 to display Process Adjustment to Paper Setting. [Service mode]→ [System Setting]→[Software DipSW Setting] 2.

In Process Adjustment of Paper Setting, turn ON [Thick Bk mode] to ON. With this setting, even for the single Bk printing, YMC 1st transfer roller is in pressed state and that is effective to reduce vibration. [Paper Setting]→[Process Adjustment]→[Thick Bk mode] •

•

When the Thick Bk mode is enabled, even for the single Bk print, process related parts such as charging corona, drum, developing unit, developer, 1st transfer roller of Yellow, Magenta and Cyan is consumed. Also, toner scattering inside machine may occur. Therefore, it is recommended to turn off the [Thick Bk mode] when it is not required. Toner scattering can be reduced by changing setting of DipSW 44-5, 44-6 (for Band creation control) Rough indication is, 3% for 3,000 pages in Thick Bk mode. However, the toner not used in the image is also consumed. Also, the paper distance is enlarged at once in every 100 pages. Consequently, the productivity decreases.

Note •

When the band creation control is enabled while the intermediate transfer cleaning unit reaches over the half of the limit count, cleaning failure may occur. In that case, replace the blade of the intermediate transfer cleaning unit. If the symptom is not improved enough by performing “2”, try following procedure 3.

Change the setting to use lower paper weight than actual paper to increase line speed. [Paper Setting]→[Change Setting] → [Paper Weight] • 257g/m2 or more : Select 217 to 256g/m2 2 • 177 to 256g/m (For low temperature environment) : Select 92 to 105g/m2 2 • 177 to 256g/m (For other than low temperature environment): Select 136 to 176g/m2 When selecting the step 1, fusing duration is decreased and fusing problem possible occurs. To prevent that, change the Fusing upper roller temperature. [Paper Setting]→[Change Set]→[Process Adjustment]→[Next]→[Temperature of Upper Fusing Roller] • 257g/m2 or more : Tray from +5°C. If Improvement level is not enough, increase the temperature. Up to +20°C setting is available. • 177 to 256g/m2 paper with 92 to 105g/m2 setting : Try +20°C setting. • 177 to 256g/m2 paper with 136 to 176g/m2 setting : Try from +10°C. If improvement level is not enough, increase the temperature. Up to +20°C setting is available.

4.

5.

Changing the screen type. [Utility]→[Machine Admin. Setting]→[System Setting]→[Expert adjustment]→[Quality Adjustment]→[Custom Screen] • Dot175 (Screen 2 at default) is recommended. By changing from Screen 1 to Screen 2, resolution is reduced. It makes the line less visible. • After changing the screen type, perform [Gamma offset adjustment]. If the solutions are not enough,

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Additionally, depending on paper, banding cannot be solved completely. If the improvement level is not enough, please request your customer to try another kind of paper.

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1.2.5. Line like ripple on image (1) Symptom Unevenness in the main scan direction (CD) occurs on solid image with 2 (or more) colors.

(2) Cause (a) High toner charge under the low humidity environment When toner charge is increased under the low humidity environment, the leak occurs at the 1st transfer section. (b) Excessive toner amount at the 1st transfer section When the density is high at the solid 2 color section, the leak occurs at the 1st transfer section. (3) Solution (a) High toner charge under the low humidity environment Perform the 1st transfer density adjustment. [Administrator Setting]→[System Setting]→[Expert Adjustment]→ [Process Adjustment]→ [Front & Back Density] After adjust "Front & Back Density" and return the "Machine" display, Perform automatically "Gamma automatic adjustment". Note • Increase 1st transfer current of all color(Y/M/C/K) from [Front & Back Density] by 5% for all colors then check the result. • If the symptom is not solved by increasing the 1st transfer, try to decrease the current. • Be sure to check the image during adjustment because excessive adjustment may cause following problems. Too much increase: Image memory may occur in the photoconductor drum cycle (188mm cycle). Too much decrease: White spots may occur. (b) Excessive toner amount at 1st transfer If the above procedure does not solve the problem, decrease the max density and reduce the toner amount to be transferred at 1st transfer. [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[Maximum Density Adjustment] After reset the transfer current adjusted at step (a) to 0, decrease the maximum density of the problem color. Change every -2 steps. Be sure to confirm if the symptom is improved. Table of contents

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1.2.6. Waste toner packing (1) Symptom Image is soiled in paper feed direction (sub-scan direction)

(2) Cause Under following condition, the temperature inside machine increases and the waste toner clumps inside the belt cleaning unit. This causes cleaning failure and toner may attach to the belt. (a) After turning OFF the sub-switch, the main switch is turned OFF though "Cooling in progress" is displayed, (b) Main power switch is turned OFF while the copy button is lighted in orange (3) Solution (a) Do not turn off the main power switch during the massage is appearing. (b) Do not turn off the main power switch during the start button is lighting in orange.

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1.2.7. Darker image up to 44mm from leading edge or after 44mm from white area (Developing memory) (1) Symptom Darker image area up to 44mm from the leading edge. Or, darker image after 44mm from white area (text or image) < Darker area up to 44mm from the leading edge>

44mm

< Darker after 44mm from white area>

44mm

(2) Cause At the area before the image or white area, the toner is easily developed on to the developing roller and the toner layer is formed on the developing roller. When the roller rotates, the developer is replaced but the toner layer is not removed. (At the 1st rotation of the roller). The image density changes when the toner layer is gone (From the 2nd rotation of the roller). The density difference appears.

After passing white area

After passing solid part (3) Solution 1. Change DipSW 46-2 to 1 (default: 0), to display Development output setting in the Expert adjustment. [Service mode]→[System Setting]→[Software DipSW Setting] 2.

Decrease development output from the expert adjustment. Select [Down] for the Development Output Setting [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment] →[06 Process Adjustment]→[Development Output Setting] • By the above setting, the developing duty ratio is changed from 30% (Satndard) to 50% for all colors. • When returning to normal screen, the gamma automatic adjustment is started. • When Down is selected for the Development Output Setting, banding on background may appear. Therefore, be sure to adjust carefully. Table of contents

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1.2.8. Lines or banding to the main scan direction (CD) due to speed difference between 2nd transfer and fusing (1) Symptom Lines or banding occurs on thick and highly stiff paper in main scan direction (CD). (2) Cause When the print paper is thick and highly stiff, and the speed differs between the 2nd transfer and fusing unit, the banding is created at the 2nd transfer. (a) When the fusing speed is slower: Banding appears at around 130mm and 65mm from trailing edge (for A3 size) When the fusing speed is slower, the paper loop becomes larger between fusing and the 2nd transfer. When the paper is released from registration or the trailing edge of the paper passes the registration guide plates, the paper is pushed back and the banding occurs at 2nd transfer unit. 130mm 65mm

Feed direction Leading edge 端

Trailing edge

1. Enlarged figure

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(b) When the fusing speed is faster: Banding position varies When the fusing speed is faster, the paper is pulled against 2nd transfer unit. Therefore, the banding occurs at 2nd transfer section. The banding appears according to the fusing roller cycle and occurrence position on image is not constant. Unable to specify the occurrence position.

Feed direction Trailing edge

2. Enlarged figure

(3) Solution 1. Print a test pattern with following conditions ● Paper type and weight: The same as the problem paper ● Size : A3 ● Chart : Test pattern #53 ● Color : Bk ● Density : 150 ● Quantity : 15 sheets 2.

Adjust fusing speed [Machine]→ Paper Setting]→[Change Set.]→[Process Adjustment]→[Fusing Speed Adjustment] Banding position Adjustment direction

Like Enlarged figure1 [+] : Increase fusing speed

Like Enlarged figure 2 [-] : Decrease fusing speed

3.

Check the test pattern printed at step 1 and change the setting.

4.

Repeat the above step 1 through step 3 to get the optimum settings.

Note Change by 10 steps at the beginning.

Continue fine tuning checking the adjustment result.

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1.2.9. Image got blurred affected by ozone (cyclic white band) (1) Symptom Cyclic white band occurs. ● Width of band : Width of charging corona (approx 18 to 20mm) ● Cycle : Drum (approx 188mm)

Sub scan direction (FD) Drum cycle (approx 188mm) (2) Cause A product resulting from ozone attaches to the surface of the photoconductor drum. Under high humidity environment, when a product resulting from ozone attaches to the photo conductor drum, it absorbs moisture. This reduces resistance of the photoconductor drum surface. Consequently, image gets blurred. (3) Solution Enable drum tiny rotation mode (a) Set auto shut off to [---min]. [Utility/Counter]→[User settings]→[System Setting]→[Power Save Setting]→ [Power Save Function Setting]→ Set --- min. for Auto Shut OFF Timer Setting. (b) Keep sub-power ON (Do not turn OFF sub-power switch)

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1.2.10. Photoconductor (Drum) memory

A

Feed 通紙方向 Direction

A

B

B

C

C

(1) Symptom (a) The previous image appears as density difference at the 188 mm later position (drum rotation cycle).

188mm

(b) Band in CD occurs on 1st sheet. The position is up to 58mm (or 115mm) from leading edge and up to 170mm. • It occurs only on the 1st sheet and not occurs on the 2nd sheet. • It occurs when the speed mode is selected (default setting) and not occurs in quality mode.

Feed Direction

58 or 115mm 170mm (2) Cause (a) Symptom (a), (b) common • 1st transfer output is too much Mainly under high humidity environment, when the toner charging amount decreases, transfer output becomes too high. As the result, the image remains on the drum surface as latent image. • Drum potential decreases Mainly under high humidity environment, when the toner charge amount decreases, the developing ability increases. The lower drum potential is selected by the image adjustment. When the drum potential is low, the previous latent image affects. (b) Symptom (b) 1st transfer ON timing is reflected to the drum.

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(3) Solution (a)

Symptom (a) 1.

Reduce 1st transfer [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→ [Process Adjustment]→[Front & Back Density] Reduce the value for 1st Transfer Y to 1st Transfer K by 5% and check the image. Gamma automatic adjustment starts when returning to the normal screen. Note When the value is reduced too much, spots may occur. of 1 % and see the image.

2.

Adjust the value by the unit

Reduce developing ability [Service Mode]→[System Setting]→[Software DIPSW Setting] 1. Change the DipSW 46-2 from 0 (default) to 1. Then, the Development Output Setting can be changed. [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[Development Output Setting] Gamma automatic adjustment starts when returning to the normal screen. When the Development Output Setting value is reduced, transfer failure (paper surface state is reflected to image) may occur.

3.

Setting to depress memory [Service Mode]→[System Setting]→[Software DIPSW Setting] Dip-SW No. No control Decrease level Decrease level (default) Middle Large 41-0 0 1 0 41-1 0 0 1 When the depress level is set large, maximum density may increase.

(b) Symptom (b) Change 1st transfer output timing [Service Mode]→[System Setting]→[Software DIPSW Setting] Change DipSW 46-0 from 0 (default) to 1 •

Note Since the transfer output is turned on from 1 rotation earlier, the first copy out timing slightly increases. Since number of the drum rotation increases, the drum life may be shortened slightly. When quality mode is selected, the above DipSW 46-0=1 sequence is taken regardless of the dipswitch setting.

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1.2.11. Developing screw mark (at low speed) Machine rear side

Machine rear side Whole page

Rear side

Feed Direction

Machine front side

Machine front side

(1) Symptom Slant white lines in screw pitch occurs at the machine rear side, front side or whole page. (2) Cause  After continuous low coverage printing  After long term holiday like one week  An extreme change in ambient temperature and humidity. For example, from low temperature and low humidity to high temperature and high humidity  Dirt in charging unit Machine is not levelled and tilted. Machine front side is higher than machine rear side. (3) Solution Clarify the cause (a) In the case that slant white lines in screw pitch occur only at the machine rear side or in the whole page. Check the dirt of charging unit and developing unit. → Pattern 1

(b) In the case the grid in charging unit is heavily dirty by toner, replace charging unit → Refer to Pattern1 procedure_2_ note1.

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(c) In the case that slant white lines in screw pitch occur only at the machine front side. → Pattern2 Machine rear side

Feed Direction

Machine front side Pattern 1 1. Replace developer. Note: In the case the grid in charging unit is heavily dirty by toner like following photo even if charging unit life is within PM cycle. → Replace charging unit and developing unit.

2.

Update C-ROM to G00-17 or later.

3.

Increase developer conveyance speed at low speed  [Service mode]→[System Setting]→[Software DIPSW Setting] Change the DipSW 46-4 from 0 (Normal) to 1 (Increase speed).

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 

Conduct Gamma Automatic Adjustment [Service mode]→[Process Adjustment]→[Drum Peculiarity Adjustment]→[Gamma Automatic Adjustment]→[Start] Back to normal screen Note When the developer conveyance speed at low speed is increased, sharp line may be easily seen. So, when changing the setting, please confirm the actual print.

4.

Execute toner band creation function (Color 5%, BK 5%). By using toner band creation function, the toner is regularly ejected from the developing unit, and fresh toner is supplied. When the less than Color / BK 5% coverage is printed continuously, toner band is created on the intermediate transfer belt to keep minimum coverage becomes Color / BK 5%. Toner band creation

Dip SW

YMCK : 5%

44-5 44-6

Recommended Setting 1 1

Default 0 0

Side effect: Toner band creation setting reduces the productivity (Reduce by max 10% for A4 conversion) and increases toner consumption at low coverage printing. When the intermediate transfer cleaning blade count reaches more than half, the cleaning failure may occur. In high-temperature and high-humidity environment, slight toner dot may occur. To prevent 2nd transfer roller getting toner dirt from toner band, change the DIPSW for 2nd transfer unit pressure release setting. DIPSW59-7 : 1 (Default: 0) Pattern2 1. Level the machine in horizontal position by using the level.

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1.2.12. Lines or banding on image due to speed change (shock noise) (1) Symptom On the thick or the hard paper, white or color lines to CD (main scan direction) occur. Check the lines position from the following figure and specify the cause location and apply solution matching the cause. Note Depending on the paper posture, the location on the actual paper may vary by +/-10mm. • C1070 (Shifting at 2nd transfer)

89 108 Fusing roller contacts Fusing nipping start

Cause/Solution (a)

252 266 290 358

Registration roller release High speed Middle speed Cause/Solution (b) Low speed

Exit registration guide

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Cause/Solution (a)

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• C1060 (Shifting at 2nd transfer)

89 108 Fusing roller contacts Fusing nipping starts Cause/Solution (a) 237 245 265 359

Registration roller release High speed Middle speed Cause/Solution (b) Low speed

Exit registration guide

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Cause/Solution (a)

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• C1070 (Shifting at 1st transfer)

34

Previous sheet exit 2nd transfer Cause/Solution (b)

104 193 213

Enter to 2nd transfer

Cause/Solution (c)

356 370 394

Fusing roller contact Fusing nipping starts

Cause/Solution (a)

Release registration roller High speed Middle speed Cause/Solution (b) Low speed

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• C1060 (Shifting at 1st transfer)

33 104

Previous transfer

sheet

exit

2nd

Cause/Solution (b)

193 213

Enter to 2nd transfer

Cause/Solution (c)

341 350 370

Fusing roller contact Fusing nipping starts

Cause/Solution (a)

Release registration roller High speed Cause/Solution (b) Low speed

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• C1070 (Shifting at write unit)

76 77 138 82 139 143

Previous sheet exit registration guide High/Low speed Middle speed

Cause /Solution (a)

Previous sheet exit 2nd transfer High/Low speed Middle speed

Cause/Solution (b)

208 297 317 Enter to 2nd transfer

Cause/Solution (c)

Fusing roller contacts Fusing nipping starts

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Cause/Solution (a)

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• C1060 (Shifting at write unit)

94

33 47 108 137

208 297

75

Previous sheet exit registration guide Low speed Middle speed

Cause/Solution (a)

High speed Previous sheet exit 2nd transfer Low speed Middle speed Cause/Solution (b) High speed

317

Enters 2nd transfer

Cause /Solution (c)

Fusing roller contacts Fusing nipping starts

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Cause/Solution (a)

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(2) Cause (a) Changes due to the paper behavior at 2nd transfer When the paper enters to the fusing unit or exits from the registration guide plate and force relation at 2nd transfer is changed by the paper, the shifting occurs at the 2nd transfer. Or if it is conveyed to the intermediate transfer belt, shifting occurs at 1st transfer or write unit. (b) Changes due to the speed difference between fusing unit and the 2nd transfer. Depending on the paper hardness, the paper is pulled, pushed or goes back between 2nd transfer and fusing unit. Consequently, 2nd transfer shifts occurs. Or if it is conveyed to the intermediate transfer belt, shifting occurs at 1st transfer unit or write unit. (c) Changes due to the paper behavior between registration unit and 2nd transfer unit. Depending on the paper position between registration and 2nd transfer unit, the paper which is just before 2nd transfer nipping is pulled or pushed or goes back between registration unit and 2nd transfer unit. It is conveyed to the transfer belt and shifting occurs at 1st transfer or write unit. Mechanism of shifting at 2nd transfer • Fusing roller speed < Registration roller speed (2nd transfer roller speed) 2nd transfer roller Vt

Fusing roller Vt

Goes back

Registration roller Vr

The loop is formed between 2nd transfer and fusing unit

When the registration is released, the loop between 2nd transfer and fusing unit is released, the loop is released and shifting occurs at the 2nd transfer.

• Fusing roller speed > Registration roller speed (2nd transfer roller speed) Pulled

The paper is pulled between 2nd transfer and fusing

When the registration is released, fusing unit pulls the paper and shifting occurs at 2nd transfer

･ Fusing roller speed Drum speed: White line Belt speed < Drum speed: Black line The banding width varies depending on the degree of the change; lines or blurred banding occurs Mechanism of shifting at Write position Vd

Drum Vd± Δ Vd

PH

Write position

Write position shifts by the drum speed difference Drum speed > 0: White line Drum speed < 0: Black line The banding width varies depending on the degree of the frequency change; relatively clear lines occur.

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(3) Solution (a) Lines due to the paper behavior at the 2nd transfer 1. Check 2nd transfer pressing release mechanism works normally. 2. To reduce the force change at the 2nd transfer, reduce the pressure.

3. Check if the fusing guide plate/front is installed normally, (bending or fitting state of guide plate) (b) Lines due to the speed difference between the fusing and the 2nd transfer 1. Check the fusing roller rotation status (Whether roller rotation is smooth). 2. Check if the pressure release mechanism is normal. 3. Adjust fusing speed to depress the influence of the force change.

(c) Lines due to the paper behavior at parts between the registration and the 2nd transfer 1. Swap the drum with other color to see the state. 2. Check the guide plates upstream of the 2nd transfer. Table of contents

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1.2.13. Developing roller (44mm) cycle banding (different density) (1) Symptom Lighter or darker density bands appear at 44 mm cycle in CD direction.

44mm cycle

(2) Cause Due to the developing roller deflection within the tolerance, Ds or Developer conveyance amount changes. Depending on the deflection level of the roller, developing efficiency of the photoconductor drum changes and the symptom occurs.

(3) Solution To enhance developing ability, increase the Develop AC Bias Fine Adj. setting while checking the adjustment result. Service Mode → [Process Adjustment] →[Process Fine Adjustment] →[Develop AC Bias Fine Adj.] When the setting is changed, conduct gamma automatic adjustment. Note Background, white spot or carrier attachment may occur. changing the settings.

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Therefore, check the image when

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1.2.14. Irregular darker or lighter density band appears after leaving machine under high humidity environment (Green) (1)

Symptom When the machine is left under high temperature and high humidity environment for long period, darker or lighter density band occurs in 2-color solid (green). It is not cyclic bands.

(2) Cause When the machine is left under high temperature environment, the charge of the toner in the developing unit becomes low. This causes the high developing efficiency at the print start timing and the lines of different density created by the fine potential/fine vibration become visible. (3) Solution

1.

To increase toner charge amount, perform toner refresh mode.

[Utility/Counter] → [Administrator Setting] → [System Setting] → [Expert Adjustment] → [Execute Adjust Operation] → [Toner Refresh Mode] → Going back to usual screen, the toner refresh is conducted.

Number of times of Toner refresh: Twice If following condition(s) are applicable, conduct less than twice.  Coverage (Last 5000 prints) 3% or more, and less than 5% Once 5% or more None  Life of Transfer cleaning blade 50% or more Once 2.

It the step 1 does not solve the symptom, adjust the max density to achieve higher density. [Utility/Counter] → [Administrator Setting] → [01System Setting] → [05 Expert Adjustment] → [06 Process Adjustment] → [02Maximum Density Adjustment] → Adjust the Y and C maximum density to the darker value. Going back to usual screen, the Automatic Gamma adjustment is conducted.

3.

Conduct print and increase toner charge amount. Print test patter No53, with Y and C gradation adjustment to 255 in A4 size and 100 sheets.

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1.2.15. Jittering lines at trailing edge (1) Symptom Color lines or white lines occur at the one cycle of the fusing belt (310mm) from the trailing edge of the previous sheet.

Previous 前紙 sheet

Feed 通紙方向 direction

Trailing edge of the 前紙後端 previous sheet

310㎜ 310mm （定着ベルト1周分） (1cycle of fusing belt)

(2) Cause The potential at the trailing edge of the thick paper is high. It remains on the fusing belt and affect on the next sheet image; scatters (color lines) or repels the toner (white line) on the image. (3) Solution (a) Widen the distance between papers (decrease CPM) • Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. • Copy Screen (Machine screen) → [Paper Setting]→[Change Set]→[Process Adj.] • Select [Down] for [CPM Down]. Note The productivity becomes one half so if it is not acceptable, take the solution (b). (b) Adjust the Separation DC. 1. Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. 2. Adjust Separation DC in the process adjustment. Copy Screen (Machine screen)→[Paper Setting]→[Change Set]→[Process Adj.], 3. Increase [Separation DC (Front)]. Note: When the separation DC is increased, the following symptom may occur. Do not increase much. • Plain paper Noise from static electricity appears on image • Coated paper Unable to control Wrinkle, Poor separation Noise from static electricity appears on image

(c) Check the paper state • Use the paper just unpacked. (When the moisture in the paper is low, the symptom occurrence increases.) When the PF-707 heater is turned ON during night, turn OFF it. • Note When the humidity is high and the heater is turned OFF, watch the lighter image density and wrinkles.

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1.2.16. 8mm interval FD lines (1) Symptom After replacing the drum unit to new one, multiple FD lines in 8mm interval occur.

Feed Direction 通紙方向

Multiple8mm間隔の FD lines in 8mmFDスジ複数 interval

(2) Cause Uneven transfer due to the uneven condition of the transfer belt surface. Up to 2000 prints after replacing drum unit to new one, the lubricant is gradually transferred to the transfer belt then saturated. Meanwhile, the belt surface condition becomes uneven and uneven transfer occurs. The symptom tends to occur especially when the transfer belt, drum unit, intermediate transfer belt and intermediate transfer cleaning unit are replaced as a set. 8mm interval is caused by the configuration of the auxiliary roller inside the intermediate transfer cleaning unit. (3) Solution To turn the unit to used condition, conduct color registration automatic adjustment. Press [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Execute Adjust Operation] →[Color Regist. Auto.Adj]. Press OK then go back to the usual screen. Adjustment is executed. If the lines cannot be reduced, repeat it once more. However, the maximum times of execution is 3 times. Because the cleaning blade failure may occur.

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1.2.17. Density change by static electricity (1) Symptom (a) At the 40mm to 160mm from the leading edge of paper, the different density area appears in FD direction.

Feed Direction 通紙方向

From lead用紙先端 edge 40 to 50 mm約160㎜ and approx. 160mm 40～50㎜ (b) At the approx. 50mm and 310mm from the leading edge of paper, the different density area in FD direction appears.

(One cycle of Fusing belt) 画像先端 310㎜310mm （定着ベルト1周） Paper lead edge

Feed Direction 通紙方向

用紙先端

40～50㎜

40 to 50mm from Paper lead edge

(2) Cause (a) Excessive neutralization The excessive neutralization current is applied to paper then the static electricity suction power between paper and toner is decreased. With this state, when the paper enters to the fusing nip, the image is affected by the electric field and image scatters and density looks darker. (b) Excessive neutralization Due to the same cause as (a), the static electricity suction power decreases. Unfused toner is affected by the electric field strongly and attach to the fusing belt. The toner attaches to the fusing belt is fused on the image after one cycle of the fusing belt. Where the toner is removed looks lighter and additional toner attached looks darker. (3) Solution Adjust the neutralization current 1. Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment.

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2. Adjust Separation DC current. Copy screen (Machine screen)→[Paper Setting]→[Change Set]→[Process Adj.] Adjust Separation Current. 3. Decrease Separation DC (Front) 4. Decrease Separation AC (Front) Note Please mind that after decreasing separation current, the thin paper behavior may not be stable and wrinkle, feed failure may occur on thin paper. Do not adjust excessively.

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1.2.18. FD Lines and Banding (1) Symptom Black (or Gray) lines and bands in the feeding direction occurs on printout as well as on the surface of the intermediate transfer belt. (2) Causes (a) Damage on the edge of the belt cleaning blade The position of lines are always the same because the edge of the cleaning blade is chipped or malformed for some reasons. It does not matter condition, paper type or job type, it happens when printing. (b) Clumps stuck between the blade and the transfer belt Lubricant and paper dust forms clumps. Too much clumps stuck between the cleaning blade and the transfer belt. Then cleaning failure occurs. The position of lines are random. The condition to make much clumps is; Low coverage (less than 3%) prints Low to high coverage prints Plain and fine paper (produce much paper dust) Feeding direction

Cause 1: Chipping cleaning blade

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Feeding direction

Cause 2: Clumps (3) How to specify the cause (a) Chipping cleaning blade  Lines at specific position (always the same position)  Always happens (does not matter job type, how many prints or so)  Mostly Lines Go to solution step 1 and 2

(b) Clumps  It occurs especially when continuous printing (after clumps are produced lot).  It does not occur at the beginning of print job, after stopping print or after operation of reverse rotation of the transfer belt (because clumps cleaned once).  The position is random. It occurs on different positions when switching jobs or after reverse rotation of the transfer belt.  It starts thin lines and gradually becomes fat banding Go to the solution step 1, 2 and 3 (4) Solution How to prevent and solve 1. Download the firmware below (frequent reverse rotation to clean clumps). C-ROM: G00-15 and onward 2. Replace the belt cleaning blade 3. Enable the RFP function When printing with low coverage job continuously, lubricant becomes a lot on the transfer belt and increases risk of forming clumps. The new DU applies especially much lubricant at the beginning. The RFP provides toner to the transfer belt cleaning the lubricant on it, which is a known function to prevent too much lubricant. This DIPSW executes only when installing new DU. RFP can reduce the productivity, and increase toner consumption when low coverage printing. 1. Change the setting of the "control change period setting when the drum unit is

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replaced". If the cleaning failure occurs after Drum Unit distance% reaches to the 5%, change the DIPSW to the following settings. DIPSW59-2 : 1 DIPSW59-3 : 1 2.

Turn the DIPSW for reverse rotation to clean clumps. Execute per 100 printing. DIPSW59-0 : 1 DIPSW59-1 : 1 Frequent reverse rotation to clean clumps can reduce the productivity.



Procedure to enable the RFP (toner band creation) 1. Execute Toner Refresh Mode [Administrator Setting]→[System Setting]→[Expert Adjustment]→[Execute Adjust Operation]→[Toner Refresh Mode]→[back to regular display] After returning the regular display, Toner Refresh Mode is automatically executed. Number of times of Toner refresh: Twice If following condition(s) are applicable, conduct less than twice.  Coverage (Last 5000 prints) 3% or more, and less than 5% Once 5% or more None  Life of Transfer cleaning blade 50% or more Once 2. Replace the cleaning blade When the foreing material from the lubricant attaches to the blade, blade replacement is necessary. 3. Turn the DIPSW for RFP This DIPSW execute only when installing new DU. DIPSW59-6 : 1 Caution If DIPSW44-5/44-6 were changed for FD lines and banding, turn the default as b elow. DIPSW44-5 : 0 DIPSW44-6 : 0 4. 2nd transfer unit pressure release setting on RFP. When the RFP is enabled, the 2nd transfer roller is in pressed state when the toner is supplied to the intermediate transfer belt. This may cause soilage on the 2nd transfer roller. The soilage on the 2nd tranfer roller may transfer to the 2nd side of the paper and appears on the image. To prevent it, when the RFP is enabled, release the 2nd transfer pressure. DIPSW59-7 : 1 Note Infrequently, Black lines occurs right after replacing to a new blade due to remaining lubricant in the cleaning unit. In that case, Change the Cleaning unit.

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1.2.19 5mm cycle density difference caused by the fusing unit (1) Symptom

On solid image at the later half of the image, 5mm cycle density different area occurs. It is particularly visible on BK solid in LL environment with middle speed printing. The gloss coat paper which is very smooth tends to create the symptom more. (2) Cause

The 5mm cycle corresponds with the component of the fusing roller drive engagement; equivalent to 1 tooth engagement. When the fusing unit pulls the paper, the lower press roller speed changes and the image shifts on the 2nd transfer (= difference in density) appears. (3) Solution

From the process setting of the paper setting, access Fusing Speed to adjust and enter the -150. If the density difference is not improved, adjust gradually within the adjustment range (Down to -200). Confirm the print and if the jitter line appears, readjust within the range 150 to 0 and select the optimum value so that both symptom are the least visible. . Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. [Service]→[System Setting]→[Software DIPSW Setting] While checking the actual print, enter -150 to the [Fusing Speed (Front)] and [Fusing Speed (Back Side Offset)]

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1.2.20 Color lines in CD at 13mm from the leading edge (1) Symptom Black or color line appears at 13mm from the lead edge (2) Cause When the developer deteriorates due to drastic environment change, the toner image scatters just before the 2nd transfer nipping.

13mm from lead edge (lighter at edge) Feed Direction

Lead edge to approx. 13mm

Fig 1. Occurrence example (3) Solution (a) Conduct toner refresh mode to eject the developer so that new developer is supplied. [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Execute Adjust Operation]→[Toner Refresh Mode]→Go back to normal screen to start adjustment. Number of times of Toner refresh: Twice If following condition(s) are applicable, conduct less than twice. Note: When the machine has stopped for 3 days or more, conduct twice regardless of the following conditions.

Condition

Number of times 3% or more, and less than 5% Once Coverage (5000 prints) 5% or more None Transfer Cleaning blade Life 50% or more Once (b) Print the solid with the line appearing color to supply new developer. [Service mode]→[Test mode]→[Test Pattern Output Mode] Print No. 53 with 255 until the line is gone. Note Add blank area on leading edge or print in single color. solid, JAM may occur.

If the 2 or more color included

(c) When the symptom is repeated on the specific machine, set the toner band creation so that the new developer is supplied periodically. [Service]→[System Setting]→[Software DIPSW Setting] Change DipSW to change toner band creation interval. Recommendation value: YMCK 3%

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DIPSW Setting Toner band creation setting Color(YMCK)

0% DipSW 44-5 = 0 DipSW 44-6 = 0 (Default)

15% DipSW 44-5 = 0 DipSW 44-6 = 1

3% DipSW 44-5 = 1 DipSW 44-6 = 0

5% DipSW 44-5 = 1 DipSW 44-6 = 1

Note  When the intermediate transfer cleaning unit count reaches later part of the life count, cleaning failure may possibly occur. In that case, replace the intermediate transfer cleaning blade.  When the developer is deteriorated, the effect of the setting change may not appears. When the band creation setting is enabled, KMI recommends to replace the developer together.

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1.2.21 White line due to separation claw mark (1) Symptom Separation claw slightly damages the intermediate transfer belt and it appears as the white line on the halftone image. (2) Cause When the lead edge of the paper passes the 2nd transfer section the 3 separation claws contacts with the intermediate transfer. When it is repeated, this may cause the scratch on the intermediate transfer belt surface or toner filming of the belt. (3) Solution It is possible to change claw press condition by the DIPSW setting. When the auto (default) is selected, the separation claw is released only for the paper less than 91gsm. Paper weight 62 to 74gsm 75 to 80gsm 81 to 91gsm 92 to 105gsm 106 to 135gsm 136 to 176gsm 177 to 216gsm 217 to 256gsm 257 to 300gsm

Auto ON OFF

Pressure ON ON ON OFF OFF OFF OFF OFF OFF

Contents Auto: Claw function for specific paper Always pressed: While printing, the claw contacts with the pressure and released. Always release: Claw does not function

Note When the separation claw is always released, the thin paper may wrap the intermediate transfer belt. If jam code is cleared without clearing the paper, paper may enter to the intermediate transfer CL.

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1.2.22. Gloss band in CD with margin width (1) Symptom Gloss band in CD which corresponds with the margin appears.

st

1 sheet margin

The same as margin width

nd

2 sheet margin

The same as margin width

311mm

311mm

311mm (2) Cause ・Due to the effect of the wax component transferred from the fusing belt upper, the gloss difference appears by the cycle of fusingg belt upper (311mm). (One kind of gloss memory) (3) Solution 1. Reduce fusing temperature by every 5ºC to check the result. [Paper Setting]→[Change Set]→[Process Adj.] ･[Upper Fusing Roller Temperature] Note When the Process Adj. is not indicated, change the DIPSW1-0 (To show process adjustment in the Paper Setting) from "0" to "1" (Show). 2. If the step 1 does not improve the symptom, change the temperature by every 5ºC within the adjustment range (±20 ºC and search the best setting which the symptom does not occur easily. Note ･When the temperature is decreased too much, fusing under offset may occur. ・When the temperature is increased too much, curl may become larger depending on the paper type or environment. In that case, increase temperature of [Lower Fusing Roller Temperature] or use the curl adjustment of main body/RU. [Paper Setting]→[Change Set.]→[Process Adj.]→[Lower Fusing Roller Temperature] Main body [Curl Adjustment] RU [Paper Setting]→[Change Set.]→[Process Adj.] →[Output Curl Adjustment]

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Tips ・Low temperature Regardless of the previous image, the gloss level is entirely low and the gloss memory is not easily seen. ・High temperature The wax amount difference at gloss history is big but entire gloss level is high and the gloss memory is not easily seen. ・Middle temperature Depending on the wax amount difference in the gloss history, the gloss memory is easily find.

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1.2.23 Image lacks at the corner of the trailing edge (Soilage in main scan direction (CD)) (1) Symptom Image lacks at the trailing edge of the paper. At the same time, the soilage to the CD direction the same as the lacking part occurs after one cycle of the intermediate transfer belt. (approx. 862mm). (2) Cause Depending on the paper type (thin paper, fine paper etc), the paper behavior becomes unstable after entering to the fusing unit. If the trailing edge of the paper flips and vibrates slightly and contact with the intermediate transfer belt, the contacting part appears as white part on image. Since the electric charge gathered at the paper edge is added to the toner attaching to the intermediate transfer belt, it sticks on the belt more firmly on the belt and is not cleaned by the intermediate transfer belt cleaner. It is retransferred on the next image then appears as soilage to CD direction.

80.3m

431.8m

80.3m

Soilage

872.4mm (Intermediate transfer belt cycle: 861.8mm) 280m

Lack (3) Solution Increase the margin at the trailing edge The symptom tends to occur when the margin (blank area) at the trailing edge is narrow. enlarge the margin.

So

(a) Move the writing position Set the smaller value for the lead edge trailing edge. [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Printer Adjustment] →[Restart Timing Adjustment] Note Depending on the image, margin at the lead edge becomes too small causing feed problem or image quality problem. (b) Set to erase the trailing edge (the image at the last of the trailing edge is not printed.) 1. Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. [Service]→[System Setting]→[Software DIPSW]→DIPSW01-0:1 2. Change the trailing edge erase amount. Machine tab→[Paper Setting]→[Change Set]→[Process Adj.] →[Rear Edge Erase Quantity]→ Recommendation +50 Table of contents

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1.3.1. Image after white part becomes darker (Developing ghost) (1) Symptom When printing solid part and white part mixed image, the density of solid part at immediately after white area looks darker. This also occurs if printing the color not included in solid part. . (The same situation as printing white area.)

Feed direction

Feed direction

(2) Cause When printing partly solid image, the toner on the developing sleeve roller is consumed only at the solid corresponding part. Then when printing the next solid part, the toner supply does not catch up for the previous solid part. Consequently, the second solid part is printed slightly lighter. (Blue line indicated area). On the other hand, for the white part, toner amount on the roller is sufficient and printed with correct density. (Red line indicated area). As the result, the density difference is very noticeable.

(3) Solution To increase developing ability, perform adjustment. Be sure to check actual print at every step. Note Adjustment may cause background or carrier attachment. Please adjust carefully. 1.

Decrease the set value of Covered margin fine Adj. Service mode→[Process adjustment]→[Process fine adjustment] →[Covered margin fine adj] After setting, perform auto gamma adjustment.

2.

Increase the set value Develop AC Bias Fine Adj. Service mode => [02 Process adjustment] => [04 Process fine adjustment] →[02 Develop AC Bias Fine Adj.] After setting, perform auto gamma adjustment.

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3.

Decrease the set value of Develop AC frequency Service mode→ [Process adjustment]→[Process fine adjustment] →[Develop AC frequency] After setting, perform auto gamma adjustment.

4.

Increase the set value of Toner density fine adjustment Service mode →[Process adjustment]→[Process fine adjustment] →[Toner density fine adjustment]

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1.3.2. Darker at the trailing edge of image (1) Symptom The image density increases at the trailing edge of the paper to the paper feeding direction

Feed direction

(2) Cause Developing sleeve rotation direction and drum ration direction is opposite. (3) Solution 1. Change the screen. If Line1 or Dot1 is used, change to Line2 or Dot2. Still the image density difference is noticeable change the Custom screen setting: Utility menu→[Machine Admin. Setting] →[System Setting] →[Expert Adjustment ] → [Quality Adjustment]→[Custom screen]. Change [Line2]:[Type1] to [Type2], [Dot2]:[Type1] to [Type2]. 2. Change the Developing AC frequency If customer does not want to change screen, change the Developing AC frequency from Service mode. Service mode→[Process Adjustment]→[Process Fine Adjustment]→[Develop AC Frequency Fine Adjustment] Note However, when changing this setting, the background or rough image may occur.

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1.3.3. Background or toner scattering after continuous low coverage (1) Symptom Continuously printing high coverage (50% or more) after continuously printing low coverage (less than 3% and 10,000 prints or more), toner may scatter from the developing unit or background may occur. (2) Cause Though new developer is supplied, too much low charged developer remains inside the developing unit. (3) Solution To consume low charged developer, change the setting to constantly consume the developer by creating toner band. (Toner band is not created by factory setting) Recommendation value: 3% [Service mode]→[System Setting]→[Software DipSW setting] Change Dip-SW setting and create the toner band. DipSW Toner band creation setting Color(YMCK)

0% DipSW 44-5 = 0 DipSW 44-6 = 0 (Default)

15% DipSW 44-5 = 0 DipSW 44-6 = 1

3% DipSW 44-5 = 1 DipSW 44-6 = 0

5% DipSW 44-5 = 1 DipSW 44-6 = 1

Note • When the band creation control is enabled while the intermediate transfer cleaning unit reaches over the half of the limit count, cleaning failure may occur. In that case, replace the blade of the intermediate transfer cleaning unit. •

When the developer is deteriorated, the effect of the setting change may not appears. When the band creation setting is enabled, KMI recommends to replace the developer together.

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1.3.4. How to maintain consistent color during continuous printing (1) Symptom Inconsistent color (2) Solution C1070 series have 3 correction items to adjust the color. Aim the stable color optimum for the target depending on the job size and machine usage by combining correction items and interval. 1.

Priority on stability To enhance stability in density during continuous print, select Stability. When the Stability is selected, the distance between papers is enlarged at certain interval then the patch is created for the density control. • [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Quality Adjustment] → [Stabilization Adj. Setting]

• [Machine]→[Stabilization Adj.]

From either of the above screen, change the setting from [Speed] to [Stability]

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• Merit and demerit at selecting, “Stability” Merit Stable density during JOB Demerit Productivity decrease (95% for A4 size) If the density difference between images is too large, stabilization operation of about 30 sec, may be inserted in the middle of a job. 2.

Automatic gamma adjustment Adjustment cycle : 1000 prints Adjustment duration: 80 to 120 seconds Note Even the adjustment cycle 1000 prints comes, the adjustment is performed only after 1minute interval between jobs.

3.

Customize correction operation (change interval) Color calibration during a job Changing interval of the calibration operation will effective to balance between stability and speed depending on the job size and machine use state. The setting is selectable when the “Stability“ was selected. How to set [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Quality Adjustment]→[Stabilization Adj]

Correction performing interval is roughly the following prints. Operation duration : Approx 1 sec (conduct during job) Max density correction

-2 200 prints

-1 100 prints

Frequency Normal 50 prints

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1.3.5. Small blank area or color registration error (1) Symptom Small blank area appears or color registration error is visible at the text or fine line part (2) Cause When using heavy paper (256g or more) or thick paper, the intermediate transfer belt rotation speed is changed when the paper passes the 2nd transfer unit. It causes the color registration error at the first transfer where the toner on the photoconductor drum is transferred to the intermediate transfer belt. The color registration error appearing 1st position depends on the distance between 2nd transfer roller and drum for each color. (See figure 1) From 495 mm of the 1st sheet and from the 2nd sheet, the color registration error of each color overlaps and appears for all colors.

Leading edge

Feed direction

1 115m

2

3

4

Yellow

95m 95m 95m

95m

4 Magent

20m 95m

3 Cyan

95m

2 Black

Abnormal: Cyan color registration error

Normal: No registration error

115m

1

Fig.1: Color registration error appearing position for A3 (297x420ｍｍ) (3) Solution It will be improved by the following: To reduce the intermediate transfer belt speed change, increase the line speed by following 1. From COPY or MACHINE screen, select [Paper Setting]. Select arbitrary tray. Then select [Change]. At the [Weight], select the lighter weight than actually used paper. (As the rough indication, 1/1 speed for 105gsm or less, 2/3 speed for 106 to 209 gsm) However, if the above setting change is performed, fusing time is reduced and fusing failure may occur. So, the setting should be used carefully. 2. If the fusing failure occurs after trying the above (1), change the fusing temperature by following procedure: From COPY or MACHINE screen, select [Paper Setting]. Select arbitrary tray. Then select [Change]. Select [Process Adj.] then press [Next] button. For the [Upper Roller Temperature (Print)] and [Lower Roller Temperature (Print)], enter larger value. However, if the fusing roller temperature is changed, paper turns wavy or blister on the coated paper may occur. Additionally, depending on the paper, the registration error cannot be solved completely.

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If the improvement level is not enough, please request customer to try another paper type.

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1.3.6. Too high gloss (1) Symptom

Gloss is too high. (2) Cause

Fusing temperature setting is higher for the paper. (3) Solution

1. Update FW to ver.20 or later. 2. Show Process adjustment in Paper Setting. Change DipSW 1-0 from 0 (Default) to 1. 3. To improve too high gloss, reduction of the Upper fusing temperature is effective. Use the preset button (It appears after setting the DipSW 1-0 to 1) [Paper setting]→[Preset]→[Lower]

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Caution When [Up fusing Initial Temp.] is changed, "fusing failure" (Toner is peeled off because fusing temperature is not enough) may occur.

4. Decrease Upper Fusing Roller Temperature for respective trays. [Machine]→ [Paper Setting]→ [Change Set]→ [Process Adj.]→[Upper Fusing Roller Temperature] As the first step, change temperature by 10 °C then gradually decrease (Max 20 °C) To avoid fusing under, print the test pattern 20 sheets of No. 69 and check image. 5.

If the effect is not enough, replace the fusing belt (A57V720200) to that for the envelope fusing unit.

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1.3.7. Rough image on the 1st side of duplex (1) Symptom

The image on the 1st side of duplex print gets rough and not glossy, (2) Cause

(a) When Mix mode or changing a tray, Temperature of lower roller surface is too high. (b) Temperature of lower roller surface is too high shortly after print starting. (3) Solution

(a) When Mix mode or changing a tray, Temperature of lower roller surface is too high. Change fusing stability setting in Administrator setting. [Administrator Setting]→[Common Setting]→[Fusing Stability] Change setting to [Better Quality] or [Best Quality] Note When changing the setting from Speed (default), to [Better Quality] or [Best Quality], productivity may decrease. It is noticeable when paper type is switched. (b) Temperature of lower roller surface is too high shortly after print starting. 1.

Change DipSW1-0 from 0 (Default) to 1 to show process adjustment on paper settings. [Machine]→[Paper Setting]→[Change Set.]→[Process Adjustment]

2.

Decrease fusing roller lower temperature for respective tray. Change by 5°C. Maximum adjustment range is 15 °C. Be careful for the fusing under offset. To check, print 20 sheets of test pattern 69.

3.

When the effect is not enough, decrease upper fusing roller temperature. Change by 5°C. Maximum adjustment range is 15 °C same as lower roller. Be careful for the fusing under offset. To check, print 20 sheets of test pattern 69.

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1.3.8. White or color banding at thick paper leading and trailing edges (1) Symptom On thick paper, white or color banding appears at 5 to 10mm from leading edge and 20mm from trailing edge.

Feed direction

10mm from leading edge

20mm from trailing edge

(2) Cause • White band: Void due to abnormal discharge When very stiff paper is fed, the paper pushes up the intermediate transfer belt when the leading edge or trailing edge of the paper enters to the 2nd transfer nip. The belt and paper does not contact at that point causing abnormal discharge. The toner reversely charged is not transferred to the paper and looks like void (white spot). •

Color lines: Shock generated when the trailing edge exit the 2nd transfer front guide and blur due to abnormal discharge. When very stiff paper exits the 2nd transfer front guide, the paper hits the belt strongly and generates shock. The shock makes the image on the belt blurred.

(3) Solution (a) Change 2nd transfer pressure 1. Change DipSW1-0 from 0 (Default) to 1, to show process adjustment on paper settings. 2. [Machine]→[Paper Setting]→[Change Set.]→[Process Adj.] [2nd Trans. Pressure] Select [Normal] When [Normal] is selected, color line in main scan direction (CD) may appear at 105mm from leading edge. If it is noticeable, set the setting to auto and go to step 2 in below. If the improvement level is not enough, without reset the setting, go to the step 2, 2nd transfer output adjustment. (b) 2nd transfer output adjustment 1. To show process adDipSW1-0 from 0 (Default) to 1. 2. Adjust 2nd transfer current at the banding occurring part. [Machine]→[Paper Setting]→ [Change Set.] → [Process Adj.]: [2nd transfer-Lead Edge (Front)], [2nd transfer-Lead Edge (Back)], 2nd transfer-Rear Edge (Front)] or [2nd transfer-Lead Edge (Back)] If output is reduced too much, poor 2nd transfer occurs. Please adjust while checking actual print image.

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(c) Change paper face (turn around the paper in the tray) (d) Change paper grain direction The symptom is improved when the paper grain is vertical to the feed direction. example, long grain for A3 paper.)

(For

(e) Leading edge and trailing edge erase 1. Change DipSW1-0 from 0 (Default) to 1, to show process adjustment on paper settings. 2. Adjust the leading edge and trailing edge erase amount. [Machine] → [Paper Setting] → [Change Set.] → [Process Adj.] Lead edge erase quantity and Rear edge erase quantity. Note Carefully set the erase area because the image in the erased area is not printed.

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1.3.9. C-2451, C-2452, C-2453 or C-2454, Low toner density (1) Symptom Just after developing unit replacement, C-2451, C-2452, C-2453 or C-2454 (toner density abnormal) occurs. (2) Cause The orange tape is still attached to toner supply inlet of the respective unit. (3) Solution (a) Turn OFF the sub-switch then the main-switch of machine. (b) Open the front door and remove the internal cover. Gently pull out the process mount. Be careful not to spill the toner. (c) Remove the developing unit from the process mount and remove the orange tape. (d) Clean inside the machine when it gets soiled. (e) Reinstall the developing unit to the process mount. (f) Push back the process mount then fix the internal cover with the screw. Close the front door. (g) From the service mode, conduct [Toner Density Revert] for the applicable color for 4 to 5 times. Select the applicable color then press [Start]. Repeat 4 to 5 times. [Service]→[Process Adjustment]→[Drum Peculiarity Adj.]→[Toner Density Revert] (h) Conduct [Gamma Automatic Adjustment] [Service]→[Process Adjustment]→[Drum Peculiarity Adj.]→[Gamma Automatic Adjustment] (i) Measure the density and confirm that no problem occurs.

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1.3.10. Poor transfer at image front (1) Symptom When the periodic cleaning of the 2nd transfer unit is not enough, poor transfer may occur at the entire area of the machine front side image.

Front side image gets lighter; color is fainted.

Paper feed direction (2) Cause The dust from 2nd transfer roller shaft due to wearing, builds up on the 2nd transfer pressing part and the pressed status becomes improper. (3) Solution

Clean the pressure sliding part (4 position) and surrounding area (See the figure in below) with the alcohol and the hydro wipe. If the symptom does not improve, replace the pressing cover (A50U5209) at machine front side with new one.

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Rear

Front

前

後

A50U5209 A50U5209 Pressing cover 押圧蓋 Pressure

押圧摺動 sliding part

Surrunding

摺動部周 area

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1.3.11. Prevention of the backside soilage (1) Symptom The backside of the paper gets soiled (includes 75mm cycle, the 1st one is at less than 75mm) (2) Cause The patch created between images in image stability priority mode attaches to the 2nd transfer roller. Though the 2nd transfer roller's cleaning operation which is to return the toner to the intermediate transfer belt using the static electricity is inserted, depending on the environment (especially at low humidity environment), and the 2nd transfer roller consuming state and paper type (additive of paper), cleaning performance is not enough.

(3) Solution Change DipSW20-06 and increase frequency of the cleaning [Service] → [System Setting] → [Software DIPSW Setting] DipSW20-06=0 (Default) = 1 x 1.5 When the usual CL frequency is 4 times, it is changed to 6 times. =2x2 When the usual CL frequency is 4 times it is changed to 8 times. Note When the cleaning frequency is increased, the productivity decreases by 1% to 2 %. Therefore, change the setting and see the customer's acceptance.

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1.3.12. Fainted outline, darker at edge (1) Symptom On halftone image, the outline of the paper leading edge side gets fainted (fainted outline) and the trailing edge side outline gets darker. (2) Cause The symptom which occurs due to the reverse rotation direction between developing roller and drum rotation direction is in counter. (3) Solution Adjust the outline process. [User Setting] → [Printer Setting] → [Outline Process] 1. FD Lead Edge Density Adjustment Adjust to + direction. When the value is changed from 0 (default) to larger, the outline at lead edge is written darker. It is effective to prevent fainting at the leading edge. The more the larger value is selected, the darker the line becomes. 2. FD Rear Edge Density Adjustment Adjust to – direction. When the value is changed from 0 (default) to lower value, the outline at the trailing edge is written lighter. Darker edge of the text is improved. Note Check the image at the adjustment to check the effect. It is effective for the print image. Copy image is out of adjustment target. It is effective not only for the text but also for the graphic. However, when the problem area is l like trailing edge of the patch, this adjustment is not effective enough.

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1.3.13. Image background under high temperature (1) Symptom During continuous print on coated paper under high temperature environment, image background occurs. The symptom particularly occurs when the temperature is 25 ºC and over, Bk mode/High coverage (25% and over) (2) Cause When the printing is continued under high temperature, the grain of the lubricant on the photo conductor drum becomes larger (invisible for human eyes) The potential is low at the lubricant grain part and the toner is developed there. The number of lubricant grains becomes larger in Bk mode > Color mode, High coverage > Low coverage. When the lubricant grain increases, the image background becomes visible on coated paper. (3) Solution (a) Change the value of the Background Margin Fine Adjustment. [Service]→[Process Adjustment]→[Process Fine Adjustment]→[Background Margin Fine Adj.] Increase setting from 0 to +5 Note After changing the setting, conduct Gamma Automatic Adjustment. By changing the setting, please note that carrier attachment may occur. (b) Change the setting for the Develop AC Bias Fine Adj.] Develop AC bias [Service Mode]→[Process Adjustment]→[Process Fine Adjustment]→[Develop AC Bias Fine Adj.] Change the setting from 0 →-5. Develop AC Frequency [Service Mode]→[Process Adjustment]→[Process Fine Adjustment]] Increase from 0 to +5 Note After changing the setting, conduct the Gamma Automatic Adjustment. When changing the setting, the unevenness in density in developing cycle may occur. In that case, change the "Develop AC Bias Fine Adjustment" value slightly back for the adjustment. (c) When the image background appears at black and white mode, use the "Thick Bk mode". [Paper Setting]→[Change Set]→[Process Adjustment]→[Thick Bk mode] Change from OFF to ON. Note "Thick Bk mode” is the setting to print Bk in color mode. When this setting is enabled, even for the single Bk print, charging corona, drum, developing unit, developer, 1st transfer roller for Y, M and C consumes. Since toner scattering possibly occur, we recommend to use the "Thick Bk mode" only when it is necessary. When “Toner band creation (DipSW)" is enabled, image background and scattering toner can be reduced to some extent. (For the rough indication, toner band creation by 3% is recommended if the 3000 pages and over is printed using Thick Bk mode.) However, since all the color toner is spent, the non-used color is consumed, too. Also, once in 100 prints, distance between sheets is enlarged and productivity reduces to 90% or less.

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1.3.14 Backside image soilage (1) Symptom At duplex print, the 2nd side may get soiled at machine front and rear. (2) Cause When the oil from sintered shaft bearing and paper dust or other dust is mixed, it may drop on the bottom plate and attach to the paper when the paper goes through the bottom plate during the switch back.

Dust drops

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]

Dusts

(3) Solution Clean the above points and ADU.

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Bottom plates

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1.3.15. Toner is not cleaned at the edge of the transfer belt (1) Symptom During machine setup, the toner cleaning failure occurs at the edge of the intermediate transfer belt.

Toner pass through the edge of the blade

Cushion material Blade

(2) Cause As shown in the figure below, the blade gets over the cushion material and the edge of the blade flips.

Flipping

(3) Solution 1. Repeat, release => press => release => press repeatedly.

Press

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Space is created between belt and blade

Release 2. Press the cushion material to prevent interference. → Press the cushion material to the arrowed direction to change form. Note Be careful not to remove the cushion material.

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1.3.16. Transferability on embossed paper (1) Symptom In using embossed paper (bumpy paper), toner density of concave parts gets thin because toner cannot transfer on concave parts.

Transfer belt

M toner C toner

Paper surface

Major embossed paper  Japan Leathrc (Tokushu Tokai Paper)  US Linen Papers (Neenah Paper)  EU Elfenbeinkarton (Igepa)/ i-Tone Camric Linen Platinum White (Mohawk) Note If it is difficult to identify paper type, confirm [1.3.17. Image density is lighter on unsmooth paper (rough paper)]. (2) Cause ・Lack of electric field at concave parts Electric current of 2nd transfer is likely to flow to concave parts, and transfer becomes poor. ・Extra electric field at concave parts Transfer failure at concave parts occurs as discharge occurs through void part. ・Lack of fusing ability at concave parts Fusing ability becomes insufficient because of pressure and heat quantity for toner at concave parts. (3) Solution Select one of following 2 cases according to customer usage. Case 1: Customer rarely print unsmooth/embossed paper or print volume of those is low. Go to step 1, and step 2 through 8 until it has effect. (After changing the value, do not return to the previous value.) Solution 1 is for Case 1 customer because the effect of the solution1 is low persistent. (Almost 100 Prints) Case 2: Customer regularly prints rough/emboss paper. Go to step 2, and step 3 through 8. When Solution 2 is not effective, go to step 3 through 8 until getting effect. (After changing the value, do not return to the previous value.) 1.

Execute toner refresh mode.(Case 1) Replace toner in the developing unit by performing the toner refresh mode. [Utility/Counter]→[Administrator Setting]→System Setting]→[Expert Adjustment]→ [Execute Adjust Operation ]→[Toner Refresh Mode]→[Cancel]→[Exit[UTULITY]] Number of times of Toner refresh: Three times If following condition(s) are applicable, conduct less than 3 times.

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When the machine has stopped for 3 days or more, conduct 3 times regardless of the following conditions. Coverage (5000 prints) Transfer cleaning blade 2.

Number of times 3% or more, and less than 5% Twice 5% or more None 50% or more Twice

・2ndTrans. Pressure (177gsm and more) (The step 2 onwards is effective for both Cases1 and 2) [Paper Setting]→[Process Adjustment]→[2ndTrans. Pressure]→[Normal] 2nd Trans. Pressure (177gsm and more) is auto controlled to low. If it set to [Normal], it is not easily discharged because the distance the transfer belt and the concave parts becomes narrow. Side effect: Color registration and shock noise may get worse. ・Decrease Electric current of 2nd transfer [Paper Setting]→[Process Adjustment]→[2nd transfer output Adj.(Front) or (Back)]→Input to [+50] Side effect: Density looks lighter at multi-color solid part as poor 2nd transfer may occur. Note: When the poor 2nd transfer occur at only at trailing edge Increase output of 2nd transfer-Rear edge It is necessary to increase output of 2nd transfer-rear edge to perform offset of rear edge. [Paper Setting]→[Process Adjustment]→[2nd transfer-rear edge(Front) or (Back)]→ Input to [-20] If toner density of trailing edge still lighter, input to [-25] (change per 5step). Note If solid image gets lighter, input to [+40] in [2nd transfer output Adj.(Front) or (Back)]. (change per 10-step) [2nd transfer-rear edge (Front) or (Back)] might not change. Side effect: There are the case that solid image gets thin.

3.

・Density adjustment by increasing toner attaching amount [Paper Setting]→[Process Adjustment]→[Dens. Adjust. Per Tray(YMC) ]/[Dens. Adjust. Per Tray (K) ]→[+2] Side effect: Fusing failure and line like ripple may occur. By changing the toner attaching amount, color may change. However, it is effective to increase the density. If customer does not care the color change, conduct this one before step A. Note Fusing failure/ Toner peeling may occur. If fusing failure occurs by changing toner attaching amount, execute below. ・Increase Upper Fusing Roller Temperature If poor fusing occurs, increase fusing roller temperature.

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For the embossed paper, increase of the fusing roller temperature is effective. Please increase the temperature and check the result. [Paper Setting]→[Process Adjustment]]→[Upper Fusing Roller Temperature]→[+10] If the effect is not sufficient, change to [+20]. Increasing toner attaching amount is effective although changing color. 4.

Execute toner band creation function (YMCK5%).(Case2) When printing low coverage (less than YMCK5%) job continuously, transfer ability for embossed paper becomes poorer as the toner inside the developing unit gets deteriorated. When theYMCK5% or more coverage job is printed, the transfer ability become stable. By using toner band creation function, the toner is regularly ejected from the developing unit, and fresh toner is supplied. When the less than YMCK5% coverage is printed continuously, printing temporary stops and toner band is created on the intermediate transfer belt to keep minimum coverage becomes YMCK5%. DipSW Toner band creation setting Color(YMCK)

0% 1.5% 3% DipSW 44-5 = 0 DipSW 44-5 = 0 DipSW 44-5 = 1 DipSW 44-6 = 0 DipSW 44-6 = 1 DipSW 44-6 = 0 (Default)

5% DipSW 44-5 = 1 DipSW 44-6 = 1

Side effect: Toner band creation setting reduces the productivity (Reduce by max 10% for A4 conversion) when the coverage is YMCK5% and increases toner consumption at low coverage printing. When the intermediate transfer CL blade count reaches more than half, the cleaning failure may occur. Note  When the low coverage job was printed just before enabling the toner band creation, the effect does not appear immediately because all the deteriorated toner is not ejected at once. Therefore, print 1000 prints of 20% coverage original for all colors (Y/M/C/K).  If the immediate improvement is necessary, replace the developing unit (developer). To prevent 2nd transfer roller getting toner dirt from toner band, change the DIPSW for 2nd transfer unit pressure release setting. DIPSW59-7 : 1 (Default: 0) 5.

Replace transfer belt with new type high- resistance (A50U5105) (It will be available from July 2015).

6.

Lower Speed setting (If the effect of [Upper Fusing Roller Temperature] is not sufficient.) [Paper Setting]→[Weigh]→[Speed Setting]→[Middle or Low] Weight: 176gsm and less → Select [Middle] Weight : 177gsm ∼ 256gsm → Select [Low] When changing the setting from [Speed] which is the default, to [Better Quality] or [Best Quality], productivity decreases. Paper profile will be released (around the end of April 2016).

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1.3.17. Image density is lighter on uncoated paper (unsmooth paper) (1) Symptom Image density gets lighter on unsmooth paper. Symptom tends to occur especially when the paper surface is rough. Some of uncoated paper is categorized as unsmooth paper and some are categorized as embossed paper. The solution depends on the paper type but it is difficult to identify by just looking the printed image. At first trying some changes of key parameters for the rough paper solution. Next, perform for the emboss paper solution may be the quickest way to solve the issue Major unsmooth paper (surface rough paper)  US Spring Hill Digital /Finch Color Copy  EU Fastprint /HVO Note When the solution for the unsmooth paper is not effective, the used paper is categorized as embossed paper. Reset to default setting from "Up Fusing Initial Temp." "Upper fusing temperature" and "Paper setting" of the unsmooth paper setting.

Fig. Low Density sample for example

(2) Cause High gloss toner gets absorbed on unsmooth paper then image density looks lighter.

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・Coated paper High gloss toner (C1070) Before melting

After melting

Melting toner is not absorbed to paper's fiber and white background does not remain.

Coated

・Uncoated paper High gloss toner (C1100) Light makes regular reflection on toner's surface and changes its angle on paper's rough surface, which appears as unevenness.

Uncoated Melting toner is absorbed to paper's fiber and white background remains. ・Uncoated paper Low gloss toner (C6501) This is a small scattering reflection and appears even as a whole.

Uncoated Non-melting toner is not absorbed to paper's fiber and some are crushed leaving its shape.

(3) Solution Update FW to ver.20 or later. Against the lighter density, it is effective to "Reduce fusing temperature" or "To increase toner attaching amount". It can be easily set using the pre-set button newly available from FW ver.20 (Set DipSW 1-0→1). Change DipSW1-0 from 0 (Default) to 1, to show process adjustment on paper settings. [Paper Setting]→[Preset]→[Unsmooth Paper Density Setting] Select +1 to +4 →[OK] Button name and advanced setting  Unsmooth Paper Density Setting Button Name

Fusing roller(Up) Temperature

Evenness + 1

No increase in temp. when print start. def. value (±0) def. value (±0) def. value (±0)

Evenness + 2 Evenness+ 3 Evenness+ 4

Den. Adj. per Tray (YMC, K) def. value +1 +2 +3

The same result will be achieved by changing the [Upper Fusing Roller Temperature] and the [Den. Adj. per Tray] setting individually.

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Note  Fusing failure and line like ripple may occur.

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

If the "Den. Adj. per Tray" set "+1" or more, Color is changed. But the effect is high for increasing density.



When the button of "Evenness +1" is selected, fusing failure (such as poor fusing or toner is peeled off because fusing temperature is not enough) may occur.



When the rough paper solution is not effective, the used paper is categorized as embossed paper. Reset to default setting. Then go to "Transferability on embossed paper".



Default fusing temperature is different according to the paper type selected by the paper setting. Therefore, when changing the fusing temperature, mind the paper type selected. When necessary, execute color calibration.

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1.3.18. Gloss memory (1) Symptom The gloss is partly different. It corresponds with the image pattern. the toner was at the previous cycle).

(Gloss is higher where

(2) Cause Due to the effect of the wax component which was transferred to the fusing upper belt, the difference of the gloss corresponding to the image appears at fusing upper belt cycle (approx 311mm ) (Gloss memory).

ABCDEFGHIJKL ABCDEFGHIJKL

Wax component attaches to the fusing upper belt.

ABCDEFGHIJKL ABCDEFGHIJKL

311mm cycle ABCDEFGHIJ ABCDEFGHIJ

Repeated gloss mark (text/image)

ABCDEFGHIJKL ABCDEFGHIJKL

(3) Solution 1. Change fusing temperature by every 5ºC and see the result. [Paper Setting]→[Change Set]→[Process Adj.]→ • [Upper Fusing Roller Temperature] Note When the process adjustment is not indicated, change the DIPSW1-0 (To show process adjustment in the Paper Setting) from "0" to "1" (Show) 2. If the step 1 does not improve enough, change the temperature by5 ºC within the range ±20 ºC to seek the temperature symptom is the least visible. Note • When the temperature is decreased too much, fusing under offset may occur. • When the temperature is increased too much, large paper curl may occur depending on the paper type and ambient environment. In this case, increase [Lower Fusing Roller Temperature] or use the curl correction of the main body/RU. [Paper Setting]→[Change Set]→[Process Adj.]→[Lower Fusing Roller Temperature] Main body [Paper Setting]→[Change Set]→[Process Adj]→[Curl Adjustment] RU [Curl Adjustment] Tips • Low temperature Regardless of the previous image, the gloss level is entirely low and the gloss memory is not easily see. • High temperature The wax amount difference at gloss history is big but entire gloss level is high and the gloss memory is not easily seen. • Middle temperature Depending on the wax amount difference in the gloss history, the gloss memory is easily find. Table of contents

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1.3.19. Center of line gets broken (1) Symptom When the very smooth surface paper is used, the thin line gets broken at the middle. to occur especially on OHP sheet.

It tends

(2) Cause The toner image aggregates at the 2nd transfer unit and only the edge part is transferred well and the center part is not transferred to the text. (3) Solution (a) For the 176gsm or less weight paper, set the lower pressure for the process setting of the tray setting. Set the 2nd transfer pressure to [Low] from the process adjustment of the tray setting.

Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. [Service] mode→[System Setting]→[Software DIPSW Setting] Set [Paper Setting]→[Change Set]→[Process Adj.]→[2ndTransPressure]→[Low] (b) Change the belt speed difference between drum – Intermediate transfer belt. DipSW 41-03/04 03

04

0 1 0 1

0 0 1 1

Drum speed gap adjustment (Drum speed against the transfer belt) +0% (Default) +0.3% +0.6% +0.9%

Note Print accuracy or transfer ability may get poorer. Adjust while checking the image. Color registration ability may become poorer and torque abnormality may possibly occur.

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1.3.20 Secondary color text scatters (1) Symptom Red, blue and green texts look like blurred. (2) Cause For the dark red, blue and green texts and so on are the secondary color and the toner attaching amount reaches near 200% which is too much. When the ambient environment is low temperature and low humidity, the toner may scatters around the text. Specifically, when the background color is white, the edge gets blurred and the text looks blurred. (3) Solution 1. On the printer driver setting, enable the text color text blur prevention (a) IC-602 Access [Imaging] check [Color Text Blur Prevention], on [Outline Process] For the Object, select [Text/Graphics] or [Text/Graphics/Image] Object is commonly applied to other outline processing. Therefore, if the blur appears for the text and thin line only, we recommend [Text /Graphics]

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(b) IC-308/IC-415 Access [Image] tab, and check [Color text blur prevention] at [Edge enhancement] At the Apply enchantments to; select [Text/graphics].

Note When the Color text blur prevention is enabled, comparing with the disabled, the blur at dark red, blue, green and shadow is improved. On the other hand, the chroma is slightly lowered or when the image is checked with magnification, screen pattern is recognized easily. 2.

Set the Color text blur prevention effect level When the function is enabled, the effect level is selectable by 2-steps.

When the 0 is not enough, try the setting 1 DIPSW Setting to set effect level DipSW 0 2-3 (Image area) Default correction 2-4 (Text/Graphic area) Default correction

1 Stronger correction Stronger correction

Note When the setting is enabled, the side effect may gets worsen. Be sure to conduct adjustment while checking the image.

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1.3.21. Image offset caused by fusing unit (1) Symptom Different types of offset exists and in many cases, it is difficult to identify the cause from the image. Therefore, trying some change of key parameter for the issue may be the quickest way to solve the issue rather than identify the cause. For all the cases, the toner on the fusing belt attaches to the image at next belt cycle. the symptom occurs in the cycle of fusing belt. (311 mm interval) (a) (b) (c) (d) (e)

Therefore

Static electricity offset High temperature offset Low temperature offset Noise given by the electrostatic (Refer to 1.2.17 of Troubleshooting Guide) Noise at trailing edge (Refer to 1.2.15 of Troubleshooting Guide)

The parameter which have big influence on offset is as follows. • Grounding for fusing heat roller • 2nd transfer separation current • Fusing belt temperature • (Moisture in the paper) • (Paper properties)

Paper feed direction

A B C D

311mm

A B C D (2) Cause (a) Static electricity offset When the paper behavior after passing 2nd transfer (the distance from the separation pole) changes, the charge given to the toner changes accordingly. It lowers the electrostatic absorption power between toner and paper. The image is affected by the electric field when it enters to the fusing nip. Consequently the toner re-transferred to the fusing belt. (b) High temperature offeset Excessive heat supply to the toner at the nipping part causes the decrease of the toner stickiness then toner is pulled by paper and belt then remains on the fusing belt. (c) Low temperature offset Lower heat supply to the toner at fusing nipping part.

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Under this condition, the anchor

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effect is not generated between the paper fiber and the toner. separated from the paper and attaches to the fusing belt.

Consequently, the toner is

(d) Static electricity noise When the paper is discharged too much, the electrostatic absorption power between paper and toner is reduced. When the image enters to the fusing nip, it gets effect of the electric field and scatters the image, causing darker density. (e) Trailing edge noise Paper charging amount at the trailing edge is high on of the thick paper. This potential remains on the fusing belt and affects the next image. (Color lines if toner is scattered or white line if toner is separated) (3) Solution 1. Check the fusing heat roller ground Check the conduction between fusing heat roller and fusing unit frame using the tester. See the photo below. There should be electricity conduction (less than several hundreds Ω)

115mm

Should contact with tip (side) of roller's core metal

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When the conduction is not seen, • Clean the following part with the drum cleaner. Red circled part • Check the contact status of the spring material. If it is not enough, increase the pressure. Blue circled part

Clean with the drum cleaner.

Clean with the drum cleaner.

Caution If there is a gap between the joint of neutralization ring and fusing roller as NG picture, edge of neutralization ring shave the spring, and claw of the spring breaks. In the case of non-electricity conduction, check the below procedure. In addition, when replacing fusing belt, note in below assembly.

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NG

OK

Breakage of the spring Claw of spring

Solution 1. Filing the joint of neutralization ring, and remove the burr. The burr is likely to shave the claw of spring. 2. Bring the joint of neutralization ring into contact with claw of the spring.

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2.

Noise given by the electrostatic 1. Change the DipSW 1-0 (To show process adjustment) 0 (Default) to 1. 2. Access [Machine]→[Paper Setting]→[Change Set]→[Process Adj] And adjust separation current Increase [Separation DC (Front)] Note When the Separation DC is increased, following symptom may occur depending on the paper type. Do not increase too much. • Plain paper Static electricity noise • Coated paper Unstable behavior Wrinkle occurs, separation ability gets poorer Static electricity noise occurs When the symptom is not improved by increasing the separation current, the cause is not Noise given by the electrostatic. After reset [Separation DC] value, go to the 3. Static electricity offset.

3.

Static electricity offset 1. Decrease [Separation DC (Front)] [Machine]→[Paper Setting]→[Change Set]→[Process Adj] Rough indication: Change every 20 step. 2. Increase [Separation AC (Front)] [Machine]→[Paper Setting]→[Change Set]→[Process Adj] Rough indication: Change every 20 step. Depending on paper, [Separation AC(Front) or (Back) ] decrease of the setting may be effective to improve the symptom. When the increase of the setting value is not effective, try to decrease the setting value. Note When the separation current is decreased for the thin paper, the paper behavior may become unstable. Wrinkle, or thin paper transfer feed failure occur. Therefore do not decrease too much. 3. Check the paper status • Use just unpacked paper (when the paper moisture is low, the symptom tends to

occur) • If the Dehumidifier SW is set to ON, turn OFF.

• The SW is located on the main body, near the power supply cable. Note Under the high humidity environment, if the heater is set to OFF, lighter image or wrinkle may occur.

4.

When the symptom is not improved, it is not Static electricity offset. step after reset the value. High temperature offset

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Decrease fusing temperature [Machine]→[Paper Setting]→[Change Set]→[Process Adj.] →[Upper Fusing Roller Temperature]: Decrease the temperature Though the effect is not much decrease of the fusing temperature may improve the static electricity offset/noise by the static electricity. When the cause is the high fusing temperature offset, the decrease of the temperature is very effective. Side effect: Fusing under When the symptom is not improved, it is not High temperature offset. Perform next step after reset the value. 5.

Fusing under Adjust fusing belt temperature by changing Upper Fusing Roller Temperature Access [Machine]→[Paper Setting]→[Change Set]→[Process Adj] Adjust Upper Fusing Roller Temperature. Increase Upper Fusing Roller Temperature Note When the upper fusing roller temperature is increased, following symptom may occur. Therefore, do not to increase too much. • Fusing wrapping JAM • Too much paper curl after printing • When printing the 2nd page, corner folding/JAM/transfer repelling at lead edge and trailing edge because that the paper curl on the 1st page is large

6.

Check the paper surface condition When the surface of the paper is not smooth, symptom tends to occur. Suggest customer to tray another paper type as needed

When using envelope fusing unit (EF-103) When the offset of K color occurs under envelop mode, to increase the value of 2nd Transfer Output Adj. (Front) may improve the symptom. Shift the value to plus direction. As requirement of this function, install the following ROM and change the DIPSW. C- ROM : 00C1-18 and later DIPSW 41-7 : 1 (default 0) Change the range of 2nd Transfer Output from +/-50 to +/- 120. DIPSW27-5: 1 (default 0) When the value of 2nd transfer output has set about more than +100, it causes extremely light image density problem due to automatic correction of 2nd transfer output under low temperature and low humidity. To prevent that, the automatic correction of 2nd transfer output is limited partially under low temperature and low humidity. There is no side effect. Adjustment of 2nd transfer output Press [Machine]→ [Paper Setting]→[Change Set]→[Process Adj.]→ [2nd Transfer Output Adj.(Front)]→[+50], then increase the value per +10 until the symptom is improved. When the symptom is not improved, perform the above solution from 1 to 6.

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1.3.22. Toner band control setting (1) Symptom Image failure like following occurs: FD line (cleaning failure, white line), Background, Toner scattering, color change, poor transfer and so on. Screw mark

FD lines (Cleaning failure)

FD lines (White lines)

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Background (Enlarged view)

Blank space

Poor transfer (Embossed paper and so on)

Toner spilling

(2) Cause During long-run low coverage print, developer may get deteriorated or lubricant may be provided too much to the transfer cleaning blade. And when print alternately low coverage and high coverage, too much toner scatters causing image background and contamination inside machine. The new DU applies especially much lubricant at the beginning and too much foreign material is caught by the lubricant. (3) Solution Enable toner band control. The toner band provides toner to the transfer belt cleaning the lubricant on it, which is a known function to prevent too much lubricant. And cleaning failure, FD line and background may be reduced. It improves condition inside developing unit, and is effective to be keep stable density. When the toner band control is enabled, the 2nd transfer roller is in pressed state when the toner is supplied to the intermediate transfer belt. This may cause soilage on the 2nd transfer

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roller. The soilage on the 2nd transfer roller may transfer to the 2nd side of the paper and appears on the image. To prevent it, when the band control is enabled, release the 2nd transfer pressure. 1.

Execute Toner Refresh Mode [Administrator Settin]→[System Setting]→[Expert Adjustment]→[Execute Adjust Operation]→[Toner Refresh Mode]→[back to regular display] After returning the regular display, Toner Refresh Mode is automatically executed.

2.

Turn the DIPSW for the band. Change toner band creation interval. [Service]→[System Setting]→[Software DIPSW Setting] Recommendation value: (Y/M/C/K) 3% Screw mark, Poor transfer (Emboss paper): (Y/M/C/K) 5%

DipSW 0% Toner band DipSW 44-5 = 0 creation DipSW 44-6 = 0 setting (Default) Color(YMC) 0% Toner band DipSW 49-6 = 0 creation DipSW 44-7 = 0 setting (Default) BK Toner band setting Release the 2nd transfer pressure

15% DipSW 44-5 = 0 DipSW 44-6 = 1

3% DipSW 44-5 = 1 DipSW 44-6 = 0 (Recommend)

5% DipSW 44-5 = 1 DipSW 44-6 = 1

2% DipSW 49-6 = 1 DipSW 49-7 = 0

3% DipSW 49-6 = 1 DipSW 49-7 = 0 (Recommend)

5% DipSW 49-6 = 1 DipSW 49-7 = 1

0%

2%

DipSW 59-7 = 0 (Default)

DipSW 59-7 = 1 (Recommend)

3% DipSW 59-7 = 1 (Recommend)

5% DipSW 59-7 = 1 (Recommend)

Note  When the band creation control is set to 5% coverage, cleaning failure may occur due to too much waste toner in the intermediate transfer cleaning unit.  When the band creation control is enabled while the intermediate transfer cleaning unit reaches over the half of the limit count, cleaning failure may occur. In that case, replace the blade of the intermediate transfer cleaning unit.  When the developer is deteriorated, the effect of the setting change may not appears. When the band creation setting is enabled, KMI recommends to replace the developer together.  When the band is enabled, the 2nd transfer roller is in pressed state when the toner is supplied to the intermediate transfer belt. This may cause soilage on the 2nd transfer roller. The soilage on the 2nd transfer roller may transfer to the 2nd side of the paper and appears on the image. To prevent it, when the band is enabled, release the 2nd transfer pressure. DIPSW59-7:1  Reduces the productivity (Reduce by max 10% for A4 conversion)

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2.1.1. Paper waving (1) Symptom The edge of the paper becomes wavy.

(2) Cause (a) Paper shrinkage rate The paper shrinks rate at the fusing unit is different between the center and edges of the paper. ( Go to Solution(a) ) (b) Moisture content When very moisture paper is used the amount of moisture which vapors during fusing differ between center and edge of the paper and the symptom specifically noticeable. (Go to Solution(b) ) (c) Paper type Depending on paper type, the influence of the paper fiber is very big in some cases. (Go to Solution(c)) (3) Solution (a) Caused by paper shrinkage rate Change DipSW1-0 from 0 (Default) to 1, to display process adjustment in paper setting. Decrease fusing upper roller temperature for respective tray setting. [Machine]→[Paper Setting]→[Change Set]→[Process Adjustment] Rough target for the adjustment is by 10°C. If not enough, gradually decrease (by Max. 20°C). Print approx 20 sheets of test pattern No. 69, and check no fusing under offset occurs. (b) Moisture content caused To correct it, use the paper fresh from opening the package (containing less moisture). (c) Paper type caused If the paper waving still occurs after decreasing fusing temperature and using paper fresh from opening the package, propose customer to try another paper type.

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2.1.2. Setting for OHP sheet printing f (1) Symptom When printing OHP, off-centering by 5mm, J-3101 or fusing wrapping jam occurs. (2) Cause (a) Off-centering by 5mm Since OHP is transparent, centering sensor mis-detects the sheet position. the registration roller moves the maximum distance (5mm).

Consequently,

(b) J-3101 While forming registration loop, the sheet gets loosened and the registration sensor misdetects. (c) Fusing wrapping jam When the plain paper is set for paper type, wrapping jam tends to occur due to the relation with the fusing temperature setting. (3) Solution (a) Off-centering by 5mm Disable centering sensor. Change DipSW1-0 from 0 (Default) to 1, to display process adjustment in paper setting. [Machine]→[Paper Setting]→[Change Set]→[Process Adj.]→[Mis-centering Detection]→[Not Detect] (b) J-3101 Change registration loop amount to prevent the sheet gets too loosened. Set the registration loop amount to [-5.0mm]. [Machine]→[Paper Setting]→[Change Set]→[Both Sides Adj.]→[Registration Loop], If the [-5.0mm] setting does not improve enough, change the setting by every [-0.5mm] and see the result. (c) Fusing wrapping jam Change Paper type to [Fine] or [Color Specific] [Machine]→[Paper Setting]→[Change Set]→[Paper Type] Note: After finishing OHP printing, return the set to the original value.

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2.1.3. Trailing edge skews (1) Symptom Trailing edge skew occurs on the side2 of the duplex printing. Depending on the environment, if the paper in the tray curls, the trailing edge skews also on side 1. (2) Cause When the paper curl level is different between the lead edge and the trailing edge, the paper enters to the fusing unit unstably. Then, when the trailing edge passes the registration, fusing roller turns the paper position. (3) Solution Before taking the following action, check that the Side1 image position adjustment is done properly. Adjustment items: alignment of registration and fusing (mechanical adjustment), CD-Mag. Adjustment, CD-Mag. Adjustment Crosswise Dir. Skew Adj. 1.

Change decurler setting for each tray Machine → [Paper Setting]→[Change Set]→[Process Adj.]→[Output Curl (Back on Top)] Note Curl level changes depending on paper/environment (temperature, humidity), coverage. So check the curl level and conduct adjustment [Auto] → [+1], [+2].

2.

Adjust fusing temperature Reduce fusing upper roller temperature to reduce curl after print Machine →[Paper Setting]→[Change Set]→[Process Adj.]→[Upper Fusing Roller Temperature] The rough target is to decrease by 10°C and reduce gradually, maximum by 20°C. Note When the fusing upper roller temperature is reduced too much, fusing under offset or repelling may occur. Print 20 sheets of the test pattern No.69 to check the fusing ability.

3.

Change newly unpacked paper (low moisture content).

4.

Change paper type After taking the above steps 2 and 3 and the symptom is not improved, suggest customer to use another type of paper.

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2.1.4. Printed paper curls (without RU connection) (1) Symptom Printed paper curls largely (2) Cause Decurl pressure is adjustable by 3-level for main body exit decurl roller and reverse exit decurl roller. Decurl adjustment condition is already optimized for the paper type (plain / fine /Coated ). However, because the paper exit curl changes depending on the coverage/ambient environment/paper brand, it is impossible to cover all conditions by the automatic control. (3) Solution (a) Decurl level adjustment Request user to adjust the decurl level from the Paper Setting on operation panel. Machine → [Paper Setting]→ select a Tray →[Change Set]→[Process Adj.]→[Output Curl Adjustment]/[Output Curl (Back on Top)], select a setting (Selection: [Auto], [0], [+1] and [+2]). The idea for the setting is shown in the table below. Note Adjustment direction judged from output curl adjustment and output curl (back on top) adjustment is as shown in the following table. * Curl direction is defined by the paper ejected state from main body. Adjustment

Curl direction

Output curl adjustment

Convex curl Concave curl Convex curl Concave curl

Output curl (Back on Top) adjustment

Setting to reduce curl (left curl larger, right curl smaller) [2] → [1] → [0] [0] → [1] → [2] 0] → [1] →[2]. [2] → [1] → [0]

When face-up is selected, the paper is not sent to the reverse exit demurer roller. adjustment is not necessary.

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• Convex curl

• Concave curl

← : Paper exit direction Both side Curl direction Setting

Convex Curl +2

Concave Curl 0

1 side Face up Face down Convex Concave Concave Convex Curl Curl Curl Curl +2 +1 (0) +2 +1 (0)

(b) Fusing temperature adjustment Depress paper curl by reducing upper fusing roller temperature. [Machine]→[Paper Setting]→Select a Tray→ [Change Set]→[Process Adj.]→[Upper Fusing Roller Temperature] The rough target is decrease by 10°C decrease. (Maximum for the adjustment is 20 °C decrease). Gradually decrease. Note When the temperature is decreased too much, fusing under offset/toner repelling may occur. Print 20 sheets of test pattern No.69 and check the fusing ability then set the optimum value. (c) Change the paper which is fresh from unpacking (low moisture content) (d) Even taking the above (a) to (c) and the curl is not improved, suggest customer to use another type of paper.

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2.1.5. Fusing wrapping jam wra (1) Symptom When printing the following type of image on the thin paper, fusing wrapping jam occurs. a. Less margin at the leading edge. b. Test pattern No. 53 with 2-color solid (2) Cause When the toner attaching amount at the leading edge is much, separation fails. when the paper is very soft and thin, it tends to wrap the fusing belt. (3) Solution Following 4 choices are available.

Especially

Please select the most suitable one for the user.

(a) Adjust Lead Edge Erase Quantity 1. Change the DIPSW 1-0 to 1. 2. Access [Machine]→[Paper Setting]→[Change Setting]→[Process Adj]. Adjust the [Lead Edge Erase Quantity] to set the maximum erasure width of the leading edge image 3. Access [Service] → [Machine Adjustment] → [Printer Adjustment] → [Restart Timing Adjustment] Adjust the [Restart Timing Adjustment] to set not to wrap. Note Since the lead and trailing edge image data are erased, check the original image lead and trailing edge if it can be erased. (b) Adjust Fusing Air Separation Air Level Setting 1. Change the DIPSW 1-0 to 1. 2. Access [Machine]→[Paper Setting]→[Change Setting]→[Process Adj]. Press [Strong] to increase air volume. Note Since the paper is strongly blowed down, the paper may be pressed against the claw or guide at the non-fusing side. This may cause the scratch. Or, if the temperature is decreased while continuous printing, the fusing under offset may occur. Especially, mind this when the setting is combined with the "Fusing Temeprature Adjustment") (c) Fusing temperature adjustment 1. Change the DIPSW1-0 to 1. 2. Access [Machine]→[Paper Setting]→[Change Setting]→[Process Adj] and Decrease Upper Fusing Roller Temperature of each tray. Gradually decrease the temperature. The target of the adjustment is by 10ºC (Maximum 20 ºC) Print test pattern No. 69 by 20 sheets and confirm no fusing under offset occurs. Note When the temperature is decreased too much, fusing under offset occurs. Therefore, adjust the temperature while checking the image. (d) Enable [Toner Amount Save] 1. From the paper setting screen, select the tray where the paper is loaded. Check the Toner Amount Save. If it is set to ON, see the Note of the No. 5. If it is set to OFF, go to the step 2.

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2. Press the [Change Setting] and check that [Process Adj.] is shown. If it is not shown, access service mode and change the DIPSW1-0 to 1. (To show paper setting) and restart from step 1.

3. Press [Process Adj.] and press [Next] twice to show [Toner Amount Save] setting. 4. Change the setting of [Toner Amount Save] from [OFF] to [ON].

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5. Press [OK] twice to exit individual paper setting. On the Paper Setting, confirm that the [Toner Amount Save] is set to ON for the desired tray. Then print the image. Notes · When the Toner Amount Save control is set to ON, the following image reproduction may be slightly get poorer comparing with the OFF setting; shadow part, dark high chroma color. · Toner Amount save level is selectable from 2-level by the following DIPSW. DIPSW2-1 (Image part), DIPSW2-2 (Text/Graphic part). "0": Normal level "1": Stronger If the setting "0" (Norma level) for each is not enough, try setting "1" (Stronger). (However, the side effect also occurs stronger)

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2.1.6. No feed jam (J-1101/J-1201) (1) Symptom No feed jam occurs (J-1101 and J-1201) when the paper is fed from main body tray. (2) Cause (a) Paper Corner of the paper is fold (dog year), wrinkle, glue attachment, static electricity, bur is on the paper. (b) Side regulating plates When the side regulating plates is fixed with screw while they are pressed strongly against the paper, the top of the regulating plates tilt inward as shown in the below figure. When the plate lifts up, the paper contacts with side regulating plates and friction increases. This causes no feed jam.

Fixing material

Sides regulating plates

Lift up plate

(c) Roller The dust attaches to the roller surface or roller gets worn. (3) Solution (a) Paper Manually separate paper well (b) Reset the side regulating plate Loosen the fixing screw for the side regulating plates at front and rear. Then, set the regulating paper without stopping against the paper (paper should not contact regulating plate) then fix the screw.

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Loosen the knob of the screw, move the side plates then tighten again.

(c) Roller Clean the roller to remove paper dust and any soilage or replace it. (d) Add P1 load When the paper stops at paper pick up roller or paper does not reach to the feed roller, increase the weight on the pick-up roller (65AA4008 Paper feed Auxiliary Plate) as shown in the photo below to increase the load.

Add one piece of 65AA4008

When the weight is added, the gap is created. This may cause the loosened screw or shift of the weight Note The screw may get loosened or steel plate position may move. So, carefully apply the solution. Do not attach the weight to C8000/7000/6000/6501/5501, as paper feed solenoid does not move by the weight. (e) Add P2 load When the paper stops on the feed roller or paper leading edge stops at the downstream of paper feed roller, change the P2 load to "Strong". (Refer to the Service manual "9. Mechanical Adjustment→9.4 Separation pressure

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adjustment of the paper feed tray/1 and the paper feed tray2) If the symptom does not improve by "strong" setting, replacement of the spring to the one used for C8000 (56AA4042, multi-feed preventing spring) may be effective.

Note When the load of P1/P2 is increased, the multi-feed may increase depending on the paper. So carefully apply the adjustment.

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2.1.7. Dents on paper at 48mm cycle in FD (1) Symptom

On the print, dent is seen every 48mm cycle in sub-scan direction (FD). (2) Cause

The toner accumulated on the fusing separation claws drops and attaches to the fusing paper exit roller. It is pressed to the paper and appears as dents on the paper. (3) Solution

1.

Clean the fusing paper exit roller. Pull out the ADU mount and open the reverse section. Clean the roller indicated in the below figure with the cleaning pad and the drum cleaner.

Rotate to arrowed direction little by little and clean the surface to remove the foreign material.

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2.

Clean the fusing separation claw Pull out the ADU mount and open the reverse section. Open the side paper exit plate of the fusing unit and clean the paper contacting side of the separation claw, roller surface with the cleaning pad and drum cleaner for all 5 claws

Clean this area

Note Do not break the tip of the claws while cleaning.

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2.1.8. Centering error (±5 mm or more) (1) Symptom Image centering error by 5mm or over occurs. (2) Cause The cause could be on the registration unit on the main body (C1060/1070 series) or PFU (PF-707/602m) . (a) Main body registration unit caused 1. On the centering sensor of the main body, paper dusts attaches and causing erratic detection. 2. Centering sensor (on the main body) broke. (b) PFU caused 3. PF-707/602m or its tray position is not correctly aligned with the main body.

Off centered



(3) How to identify cause unit At the beginning, check whether the paper size is correctly set / paper is set to the tray correctly. If the size setting is unmatched with the actual size, set the correct size. If the paper is not neatly set to the tray, adjust to the correct position. If the paper size is set correctly and the paper is set correctly, follow the workflow in the next step. (4) Solution Following in the workflow chart at the last part of the document, try the solution step by step. (a) When the cause is on the main body (Degas) registration unit. 1. Clean the centering sensor of the main body with the Kim wipe etc. 2. If the cleaning not enough, replace centering sensor on the main body. (b) When the cause is on the PF-602m/PF-707 3. Correct PF-602m/PF-707 position/and its tray position →Please refer to the Service manual : I12.2/I12.3. Note After cleaning or replacing the centering sensor, conduct the centering adjustment.

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(5) How to clean /replace centering sensor 1. Remove screw [1] x 3pcs and the cover for the centering sensor [2].

[2

[1

2. Lifting up the centering sensors [3] and the holder [4].

[3] Centering sensor

[4] 3. Clean the centering sensor

4. If the cleaning is not enough, replace the centering sensor. Part number: A50UM55100

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Flow of the work Note: The sensor in the below flow means centering sensor. Centering error (over ± 5mm)

Paper size setting is correct and paper is set to the tray correctly.

No

Set the paper size setting correctly and then set the paper correctly on the tray

Yes

Does the symptom limited to PFU feed? (Not for main body

Yes

Location: PFU No

Failure location: Main body

Clean the sensor on the main body

No

Sympto m recur? Check the dust attachment to the centering sensor on the main body.

Yes

The sensor on the main body broke

Replace the sensor on the main body Table of content

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Check PFU and tray position (Should align with main body).

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2.1.9. Paper stick with each other due to static electricity (1) Symptom When the printed paper stacked on the output tray, the paper gets static electricity and following symptom occurs. The symptom tends to occur when a high coverage job is printed in duplex on the coated paper (surface smooth paper) or uncoated paper. More occurrence is seen on coated paper. ・ No feed jam or double feed jam occurs on off-line finisher ・ Output paper stick to the exit tray ・ Output paper is not aligned ・ Paper curls on the exit tray ・ Staple position shifts. ・ Center folding is not performed correctly (2) Cause While stacking the paper on the tray, paper stick or repel and move due to the static electricity on the paper. (3) Solution 1. Install RU-516 or RU-517.Connected OT-502: Install RU-517  Connected other finisher: Install RU-516 2. FW version / DIPSW Setting  RU-516 G00-20 (I/C ROM) DipSW 27-2=0 (Unconnected), 27-2=1 (Connected)  RU-517 G00-20 (I/C ROM) DipSW 27-4=0 (Unconnected), 27-4=1 (Connected) Note  Update RU-509 FW; R1-ROM to Ver.60 or later.  For the RU-516 installation procedure, please refer to the Install manual (MUBT1500024EN )  When the RU-516 is connected but the DIPSW setting is not changed from "0", jam (J7550) may occur.  When the RU-516 is not connected, but the DIPSW setting is changed to "1", error code (C-1480) occurs.

After changing DIPSW, [Output Paper Separation Setting] become selectable in the process adjustment. [Paper Setting]→[Change Setting]→[Process Adjustment]→[Output Paper Separation Setting] ON(Coated) : Apply current at duplex print when Coated paper is specified. ON(Uncoated) : Apply current at duplex print when Uncoated paper is specified. Manual : The manually adjusted current is applied. OFF : No current application

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Note • When the Process Adj. is not indicated, change the DIPSW1-0 (To show process adjustment in the Paper Setting) from "0" to "1" (Show). 3. When the symptom is not improved after selecting [ON(Coated)] and [ON(Uncoated)], for [Output Paper Separation Setting], select [Manual ] and set [Offset Value].

Test the several offset values mentioned in below steps to find the best result. 1. Access Test Pattern Output mode of service mode and enter following value. [Service Mode]→[Test Mode]→[Test Pattern Output Mode] [Test Pattern]：53 [Gradation-Y]：0 [Gradation-M]：255 [Gradation-C]：255 [Gradation-K]：0 Press [Print Mode]

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2. 3.

Load the large size such as A3 and 11x17 to the tray. In [Print Mode], select [1→2] and [Full Color].

4.

From [Paper Setting], select the tray and access to the [Output Paper Separation Setting] in the Process Adjustment [Paper Setting]→[Tray]→[Change Setting]→[Process Adjustment]→ [Output Paper Separation Setting]

5.

Change [Offset Value] to the following and print 20 sheets on large size such as A3 or 11x17. The offset value : -30/-20/-10/+10/+20/+30 Select [OFF] for the [Output Paper Separation Setting] and print 20 sheets on large size such as A3 (11x17) (Reference)  When the coverage is high on Side1 and low on Side2, the better result is

6.

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

7. 8.

expected when the + (positive) value is set. When the coverage is low on Side1 and high on Side2, the better result is expected Note:  Before printing, check that the ON(Coated) and ON(Uncoated) is selected correctly. ON(Coated) : Apply current at duplex print of Coated paper. ON(Uncoated) : Apply current at duplex print of Uncoated paper  The offset value mentioned in step 5 is for the initial check. After confirming the paper sticking condition, conduct fine tuning.

Leave the printed samples on the desk for around 30 to 60 minutes. Do not mix up sets of different setting. Pull the top sheet on the set and check the sticking level. Select the least sticking setting to register a paper profile. Instruct the customer to use the profile.

Note  Do not try the extreme value such as -50 to +50 for the [Offset Value] from the beginning, When the value is changed by the large steps, the setting will be far from the optimum, causing the strong paper sticking. 4. When the symptom still remains after step3 and the HM-102 is installed, enable humidifier for the print.

Weight: 136gsm and over Type: Color paper and coated paper [Paper Setting]→[Change Setting]→[Curl Adjustment]→[Humidifier Set.]

To use humidifer for other paper type and weight, change the DIPSW38-4 from "0" to "1"(ON) to release the prohibition.

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[Service mode]→[System Setting]→[Software DIPSW Setting] DIPSW38-4 Contents 0 Prohibited (Default) 1 Release prohibition

•

Note When the humidifier is set to ON for the 135 g/m2 or less color paper and coated paper, conveyance roller wrapping jam may occur due to the remained moisture on the surface of paper. Therefore, be sure to check whether the change of DIPSW is effective.

5. When the tested paper has been exposed in the high temperature and high humidity environment, check if the symptom changes when the paper just unpacked is used.

6. When the problem remains at the use of off-line finisher even conducting step 5, request customer to manually separate or use the jogger just before setting the paper to the offline finisher

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2.1.10. Static Sticking in Options (1) Symptom When you use the function of Options, you have encountered Mis-align output/Misalign folding/Mis-alignment as bellow. (a) Mis-align output

(b) Misalign folding

Misalign folding position Correct folding position Stapling position

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(c) Folding error with Misalignment

Correct folding position Stapling position

(2) Cause (a) The Anti-Static Performance is reduced by modification brush. - The current machine correspond to the problem that paper edge become dirty. By the side-effect of this correspondence, Anti-Static performance has reduced. (b) Characteristic problem of each machine mechanism - By the difference of toner, Characteristic problem of each machine mechanism become prominent. (3) Solution 1. Please install RU-516/RU-517. - About detail of installation, please refer to "Trouble Shooting Guide 2.1.9 Paper stick with each other due to static electricity". Caution 1. RU-516/RU-517 can only install for Color machine. 2. If your configuration include options(RU, FD, SD, PB, FS etc…), please install RU-516. 3. If your configuration include OT-502 only, please install RU-517. 2. Exchange to the previous model of Anti-Static Brush - About detail of exchanging procedure, please refer to TABT1600243*. (We will release this procedure in the end of March, 2016.)

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Caution 1. If you refer to this procedure, please confirm the "Occurrence location" and "conveyance route". And please exchange the Anti-Static brush for conveyance route. 2. If you will installation for Color machine, the paper edge might become dirty as sideeffect. Because the previous Anti Static Brush is hard material, the surface of printed toner is shaved by brush. 3. Please confirm the Anti-Static Brush type as bellow before exchanging. Brush type The detail of brush Necessity of exchanging Thunder-ron Need to exchange Brush

SUS Brush

Need not to exchange

3. Correspondence for each options -The Target model are as bellow. 1. SD-510 => TABT1502274* -About the detail of procedure, please refer to TABT1600243*. (About TABT1600243*, we will release this procedure in the end of March, 2016).

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2.1.11. Paper removing procedure on fusing wrap up JAM (1) Symptom Fusing wrap up JAM is indicated J31-02 or J31-06. +J31-02 : Paper wrap up its lead edge. (No entrance JAM is indicated same code.) +J31-06 : Paper wrap up its middle. (This code will be applied on Ver1.5 FW) conditions View from exit

Almost all sizes

100 X 148 (postcard)

View from entrance => depend on paper size

A4 Trail edge is not seen A3

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A4S Short length papers may not be seen easily. Please find carefully especially behind of upper plate. (2) Solution Procedure 1. Turn the knob M5 to clock wise carefully. →Paper can be appeared. (Please pay attention for toner dirty around fixing unit especially to remove long length papers.)

M5 M5

2. To remove JAM paper (a) For long length paper that trail edge is seen Pull out the paper by holding the paper where toner fixed. And turn the knob M5 to clock wise on need.

Pull out

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(b) For short length paper that trail edge is not seen. Turn the knob M5 to clock wise until lead edge can be seen. ・ Paper condition is easy to hold by hand Pull out the paper by holding paper with paying attention to belt and roller those are very hot.

Holding the paper around here

Pull out

・ Paper condition is difficult to hold by hand Insert the other paper into between belt and JAM paper and turn the knob M5 to counter clock wise. Then paper separate from belt. Therefor you can hold paper by hand easily. And pull out as shown in 2-2-1.

Paper stuck perfectly: At first use the other paper corner edge and insert gradually.

Paper stuck unperfectly : Use the other paper line edge. Recommended the other paper is thick paper or folded paper. 3.

Put into cleaning mode with white papers (This mode is available on default setting.)

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2.1.12 J-3102, Thin paper feed failure at the 2nd transfer unit (1) Symptom When the J-3102 occurs, the paper stops between the fusing unit and the 2nd transfer unit. (2) Cause (a) The leading edge of paper is not separated and wraps the intermediate transfer belt (Fig 1, (a) direction) Occurrence condition Paper type Plain (recycle) / High Quality / Color Paper Paper weight 62 to 71g/m2 Environment Low temperature, low humidity (b) The leading edge of the paper hits the leading edge of the separation discharge or enters the space between separate discharging Assy and the 2nd transfer roller then wrapping the roller. (Fig 1, (b) direction) Occurrence increase condition Paper type Coated paper Paper weight 81 to 91g/ m2 Environment High temperature, high humidity

Direction (a) Direction (b)

Separation discharge plate unit Normal paper path Fig.1: Paper path (3) Solution Direction (a) Adjust the separation current Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. Adjust Separation AC and DC from Machine→[Paper Setting]→[Change Set] →[Process Adj.]. 1. Change setting of Output Curl Adjustment value to the [2] (When both side) [Machine]→[Paper Setting]→[Change Set]→[Process Adj.]→[Output Curl Adjustment] →[2] 2.

3.

Adjust the discharge needle location 1. Remove the separation and discharge plate unit from the 2nd transfer unit. 2. Remove the position adjustment pins set inside of the both sides of 2nd transfer unit 3. Reinstall the pins using the upper hole. 4. Reinstall the separate discharging plate unit If effect is not enough after executing above 3 types of solution, replace the separate discharging plate unit. Remove the separate discharging plate unit from the 2nd transfer unit. Install the new one.

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Direction (b) 1. Change paper condition Dehumidify the paper or set the paper upside down in the paper cassette. 2.

Adjust the discharge needle position 1. Remove the separate discharging plate unit. 2. Remove the position adjustment pings set inside of the both sides of 2nd transfer unit. 3. Reinstall the pins using the lower hole 4. Reinstall the separate discharging plate unit.

3.

Replace the separate discharging plate unit. Remove the separate discharging plate unit from the 2nd transfer unit. Install the new one. Note: When the paper type, paper weight and the ambient condition changes, return the discharge needle position to the center.

Separate discharging plate unit Remove from 2nd transfer unit. Feed direction Discharge needle position adjustment location When the discharge needle assy is removed, Pins as shown in Fig 2 can be seen. 図 2．2 次転写ユニット概要図

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Feed Direction

Indication: Joint part with intermediate transfer unit

Discharge needle position adjustment Remove pin

2nd transfer roller

Fig. 3: The needle adjustment mechanism (Machine rear) Feed Direction

Upper: For cause (a)

Lower: for cause (b)

Fig.4: The needle adjustment mechanism (Machine rear) adjustment direction Table of content

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2.1.13 Paper wrinkle at duplex printing (1) Symptom

Paper wrinkle occurs during duplex printing.

(2) Cause

Depending on the paper type and moisture in the paper, the curl becomes larger after printing on the 1st side. Consequently, the paper lead edge of the 2nd side cannot enter to the fusing unit stably and wrinkle occurs. (3) Solution

1.

Change De-curler setting Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. Paper curl direction changes according to the paper characteristic. Therefore, check the printed paper and decide the optimum setting from 0, +1 or +2. [Machine]→[Paper Setting]→[Change Set]→[Process Adj.]→[Output Curl (Back on Top)]

2.

Adjust fusing temperature [Machine]→[Paper Setting]→[Change Set]→[Process Adj.]→[Upper Fusing Roller Temperature] Reduce temperature for respective trays. The target of the adjustment is to reduce by 10°C (Max is 20°C). Gradually reduce the temperature. Note: To prevent toner from detaching, set the temperature which does not cause fusing under offset. To confirm, print 20 sheets of test pattern #69.

3.

Change the paper which is just unpacked (low moisture content paper)

4.

If the above steps do not solve the symptom, ask customer to use another type of paper.

5.

Replace with [Guide Plate/B (A50U758201)]. Note When replace old type Guide plate (A50U747402) with [Guide Plate/B] of new type, also replace following parts together because old and new are not compatible.   

Insulating Plate /Front (A50U7448912) Insulating Plate /Front (A50U749112) Fusing Roller/1 (A50U720111)

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2.1.14 J-3201 paper is caught by the fusing separation claw (1) Symptom

The leading edge of the paper is caught by the separation claw and jam occur. (2) Cause

Toner is built up on the fusing separation claw and tip of the claw is slightly moves to the paper conveyance path direction and catches paper. Note The fusing separation claw may have gotten dirt because of fusing offset. It is recommend to apply solution of [1.3.21 Image offset caused by fusing unit]. (3) Solution

Conduct periodic and spot cleaning of the fusing separation claw. Pull out the ADU mount and open the reverse section, open paper ejection plate then clean the contacting side of the roller with the cleaning pad and drum cleaner. (5 claws)

Clean this area

Note Be careful not to break the tip of the claw.

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2.1.15 Corner folding at the paper leading edge, machine front side (1) Symptom When printing on thin small size paper, corner folding at machine front size may occur. Example of condition: uncoated paper, less than 100gsm paper and A6 size.

Referential image (2) Cause When the paper is not stiff, the edge of the paper is lifted up by the fusing exit actuator. The paper may enter to the fusing exit roller with this state. Depending on the paper pass, the fusing exit roller entering angle is different and this causes the symptom. When the paper enters to the fusing exit roller upper in the very vertical angle, the possibility of the corner folding occurrence becomes high.

Rear

Front Center of paper feed Paper

Actuator is positioned at machine front side

Fusing _Left side view

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Downstream

Actuator lifts up the edge of the not stiff and narrow width paper. Paper entrance angle to the fusing exit roller varies depending on the paper

Upstream

Fusing unit_Cross Section (Front view) Conditions which symptom tends to occur more often • Paper width: Approx. 100 to 110mm (Trailing edge corner of the paper interfere with the actuator) • Paperweight: 100gsm or less (Stiffness is very low and paper path is regulated by the actuator before entering to the nipping part of the fusing exit roller) (3) Solution To change the paper entering angle to the fusing exit upper roller, adjust the temperature of the fusing roller upper to + (plus) direction or fusing roller lower to the - (minus) direction and let the paper move along the upper guide. Note When increasing the fusing upper roller, be careful not to cause the wrapping of the fusing upper belt.

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2.1.16. Pickup jam clearance workflow Introduction Paper status in the tray largely affects paper feed ability such as JAM and skew. From the experience, incorrect paper setting in the tray is one of the major factors causing JAM. Please thoroughly instruct user to set the paper in the tray with the correct procedure. This will reduce jam occurrence.

1. How to set paper correctly to the tray 1.1 How to set paper (basic procedure) i） Set a few sheets of paper to the tray and adjust the side guides with both hands. Note: Adjusting in one-handed, only one side guide moves and another side do not move well. This may result in off-center in the tray.

When moving side guide, use the both hands as shown in the photo.

ii）

Slide the knob at the side of the tray then close the tray.

Sliding the knob (see photo left) at the side of the tray can make adjustment without downing the lift up plate. (After sliding the knob, it is necessary to open and close the tray). This enables to make more precise adjustment of the gap between paper and side guides. After adjustment, return the knob to the original position.

iii） Open the tray after the lift up plate reaches to the topmost position.

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iv） Adjust the gaps between the paper and the side guides referring to the following steps 1 through 4. Note: • Especially, to keep slight gap mentioned in 2 is important. Otherwise, JAM (non suction, multi-feed, buckling) occurs. Manual adjustments of side guides 1. Side guide scale: Set the side guides so that the front and rear indicates the same value. * Read the value at the edge of the steel plate. 2. Gap between papers and guides: Keep 0.1 to 0.2mm at each side 3. Fix side guide: Rotate the knob to fix. 4. Check the paper can move smoothly: Slide the paper by hand and confirm that it moves smoothly. * If it is caught, JAM may occur (see the figure in below) Reference 3. Rotate the knob to fix.

Front

Rear

1. Set the side guides. Be sure that the steel plate indicates the same at front and rear scales

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Note: Example of NG state If the gap is not enough, paper is caught by side guides 2 Gap between paper guides: 0.1 to 0.2mm.

and

4 Slide the paper to arrowed direction and confirm smooth movement.

v）

After step iv), return the knob to the original position then set a pile of paper.

Do not touch the side guides since they were already adjusted.

Only move the trail edge guide to load paper.

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2.

Matrix to decide jam clearance When a jam occurs, take actions in order of following steps. i) Check the jam code ii) Check the paper status in the tray and whether the paper is set properly referring to “1. How to set paper correctly to the tray”. If the paper is not set correctly, set paper correctly and instruct user how to set. iii) Take corrective actions according to jam code and paper status.

J16-01 J16-02 J16-13 J18-01 J18-02 J18-03 J20-01 J20-02 J20-03 J16-18 J16-20 J16-22 J18-08 J18-10 J18-12 J20-08 J20-10 J20-12 J16-31 J16-32 J16-33 J18-21 J18-22 J18-23 J20-21 J20-22 J20-23 J16-10 J18-49 J20-49

Step 1

Step 2

Step 3

Cheek JAM code

Check paper status

Take corrective action

JAM code Upper tray Middle tray Lower tray 2nd PFU-Upper tray 2nd PFU-Middle tray 2nd PFU-Lower tray 3rdPFU-Upper tray 3rd PFU-Middle tray 3rd PFU-Lower tray Upper tray Middle tray Lower tray 2nd PFU-Upper tray 2nd PFU-Middle tray 2nd PFU-Lower tray 3rdPFU-Upper tray 3rd PFU-Middle tray 3rd PFU-Lower tray Upper tray Middle tray Lower tray 2nd PFU-Upper tray 2nd PFU-Middle tray 2nd PFU-Lower tray 3rdPFU-Upper tray 3rd PFU-Middle tray 3rd PFU-Lower tray Multi-feed detection sensor 2nd PFU Multi-feed detection sensor 3rd PFU Multi-feed detection sensor

Remark

Description A. Not suctioned

Go to 3.2,a)

B. Chain feed

Go to 3.2,b)

C. Buckling

Go to 3.2,c)

Not reaching to suction PS

Not reaching to exit PS

D .Multi feed

Go to 3.2,d)

E. Conveyance failure

Go to 3.2,e)

C. Buckling

Go to 3.2,c)

F. No feed

Go to 3.2,f)

D. Multi-feed

Go to 3.2,d)

Not reaching to feed PS

Multi-feed detection

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Before taking the individual corrective action, make sure that the paper is set properly in the tray.

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Supplement: Details for paper status (Step 2) B. Chain feed E. Conveyance failure F. No feed D. Multi-feed

A. Not suctioned

When the tray is pulled out, all the paper stays bottom of the tray.

When the tray is pulled out, the leading edge of the paper stops at around exit roller.

C. Buckling

D. Multi-feed

The paper stops at horizontal conveyance section with the paper overlapped state

Paper is folded at near leading edge.

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3. Actions to solve jam 3.1 Before starting adjustment i） How to change air blow condition setting ・Adjust the air level from paper setting Press [Paper Setting]→[Tray*]→[Change Set]→[Air Assist] to access air level setting screen ii）

How to check paper status Check through the small window which is standard equipment and at the top left of the PFU tray. Check window

Window for lighting

PF-707/708

PF-704/705

iii） Paper lead edge normal state ・ Following shows the normal floating state according to the air-level setting for the paper weight. a) 80g/m2

b) 300g/m2 Floating paper

Floating paper

Floating sheets are separated one by one

Floating sheets are separated one by one

3.2 Corrective action according to conditions a) Not suctioned a)-1 Humidity is high

・ Turn on heater (Installation of HT-506 is necessary.) * Especially for coated paper and smooth plain paper * Especially for the 257g/m2 and heavier paper, the symptom is more likely to occur.

i) [Utility]-[User Setting]-[System Setting]-[Paper Tray Setting] - [Dehumidify Fan Heater] ii) [Fan Heater Control (Tray**)] = [Auto] (For coated paper) [Compulsory ON] (For Plain paper, Fine paper)

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a)-2 Insufficient floating Example of insufficient floating

The sheet slightly delayed to float

• Check the paper floating conditions

• Set [Side Air Level Setting] stronger. • For paperweight 176g/m2 or lighter paper

i) Check the air level ・Press [Paper Setting]→[Tray*]→[Air Assist] to access air level setting screen. ・When the [Side Air Level Setting]=9, go to the countermeasure 2 (lock the side-guide) ii) Change the air assist setting for the tray to [Manual] iii) Set [Side Air Level Setting] stronger by every 1 step.

・ Lock the side guide * For the 177g/m2 or heavier paper

・ Lock the side guide. ・ Lock both front and rear guides.

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* When the guide is locked, the duct opening is narrowed → Separate air speed increase and paper separation performance is enhanced [Before locking side guide]

[After locking side guide]

・ Remove the flap of the side guide * For 177g/m2 or heavier paper

i) Lock the side guide. ii) Remove the flap from front then rear.

Before removing front flap

After removing the flap

Flap

* With stronger air and the wider space to separate sheets the more sheets can be separated at a time.

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iii) Move the upper limit detection position upward

Lever at upper position Air hit the lead edge Lever at normal position * When the lever is set at upper position, sheets of paper before separation ascends. → The lead edge air separate the sheets more effectively. b) Chain-feed b)-1 Humidity is high

• Turn ON heater (Installation of HT-506 is necessary) * Especially for coated paper and smooth plain paper * Especially, the symptom tends to occur when the paper weight is 257g/m2 or heavier.

i) [Utility]-[User Setting]-[System Setting]-[Paper Tray Setting] - [Dehumidify Fan Heater] ii) [Fan Heater Control (Tray**)]=[Auto] (Coated paper) [Compulsively ON] (Plain paper and Fine paper)

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b)-2 Too many sheets are floating

• Sheets of paper are floating without separation. • When the belt starts to feed, the next sheet enters to the paper path without being separated.

• Set [Side Air Level Setting]: weaker

i) Change the air assist setting for the tray to [Manual] ii) Set [Side air level] weaker by every 1 step.

• Move the upper limitation detection position upward. • Set the [Lead Edge Air Level Setting] weaker. * For the size which needs auxiliary guide (140mm or less width)

i) Push up the upper limit detection position change lever

Upper position Lead edge air hits the sheets Normal position * When the lever is set at upper position, sheets of paper before separation ascends. → The lead edge air separate the sheets more effectively. ii) iii)

Change the air assist setting for the tray to [Manual] Set [Lead Edge Air Setting] weaker by1 level

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・Lock the side guide ・Set [Side Air Level Setting] weaker * For the size not using the auxiliary guide (140mm and more width) paper

i) Lock the side guide * Lock both front and rear guides.

* When the guide is locked, the duct opening is narrowed → Separate air speed increase and paper separation performance is enhanced [Before locking side guide]

[After locking side guide]

ii) Change the air assist setting for the tray to [Manual] iii) Set [Lead Edge Air] weaker by1 step

・Lock only the side guide at front ・Set the Lead Edge air/Side Edge Air weaker *Applicable to the size like B5S, A5S (182mm or less width) and 257gsm or heavier paper.

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i) Lock the side guide * Lock only the front guide. When both sides are locked, thick paper feed failure may occur due to the friction of the paper.

*By locking, the duct opening is narrowed →Separate air speed increase and paper separation performance is enhanced * By locking only front side, minimize the increase of friction [Before locking side guide]

[After locking side guide]

ii) Change the air assist setting for the tray to [Manual] iii) Set the Lead Edge air/Side Edge Air weaker by every 1 step

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c) Buckling c)-1 Lead edge gets ∩-shape curl during floating Floating condition when the lead edge∩ shape curl

Floating sheets are declining; Leading edge of the floating sheets is lower than others.

Check the paper curl direction in the tray

• Set the paper upside down

• Set [Lead Edge Air Setting] weaker c)-2 Thin paper lead edge buckling

When the 1st sheet is conveyed, the leading edge of the next sheet is largely curls downward.

• Set [Lead Edge Air Setting] Weaker

i) Change the air assist setting for the tray to [Manual] ii) Change [Lead Edge Air Level Setting] by every 1 step.

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d) Multi-feed

JAM sheets (at horizontal conveyance section) are overlapping and the leading edge of the 1st sheet is at the downstream against that of the 2nd sheet. Fig. Multi-feed JAM paper at horizontal conveyance (1st sheet advance further than 2nd sheet)

1st sheet

2nd sheet * 1st sheet advances further than 2nd sheet.

JAM sheets (at horizontal conveyance) overlaps completely and the leading edge position does not change between 1st sheet and the 2nd sheet. Figure．Multi-feed (no difference in lead edge) position

1st sheet

2nd sheet * Multi-feed. Overlapping completely without shifting leading edge.

JAM sheet (at horizontal conveyance section) overlaps and the leading edge of the 1st sheet is at upstream against that of the 2nd sheet. Fig. Multi-feed (1st sheet is at downstream), JAM at horizontal conveyance paper

1st sheet

2nd sheet *The leading edge of the 1st sheet is at the upstream of the 2nd sheet

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More than 2 sheets of the papers stop at the feed roller section Fig. Multi-feed (2 sheets or more) feed section JAM paper state

d)-1 Humidity is high

Turn ON heater (Installation of HT-506 is necessary) * Especially for coated paper and smooth surface plain paper d)-2 In case of the Symptom 1 and Symptom 4. →Take the action explained for the b) Chain feed of the same cause.

• Sheets of paper are floating without separation. ・Next sheet is not separated when the belt starts to feed and enters to the feed path.

• Set the [Side Air Level Setting] weaker

i) Change the air assist setting for the tray to [Manual] ii) Set [Side Air Level Setting] weaker by every 1 level.

・Move the upper limitation position upward. ・Set [Lead Edge Air Level Setting] weaker * Applicable to the size which needs auxiliary guide (140mm or less width)

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i) Move the upper limitation position upward.

Lever at upper position Lead edge air hits the sheets Lever at normal position * When the lever is set at upper position, sheets of paper before separation ascends. →The lead edge air separate the sheets more effectively ii) Change the air assist setting for the tray to [Manual] iii) Set [Lead Edge Air Level Setting] weaker by every 1 step

・Lock the side guide ・Set the [Lead Edge Air Level Setting] to weaker * For the size which does not need auxiliary guide (140mm or more width)

i) Lock the side guide * Lock both side guides at front and rear.

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[Before locking side guide]

* When the guide is locked, the duct opening is narrowed → Separate air speed increase and paper separation performance is enhanced [After locking side guide]

ii) Change the air assist setting for the tray to [Manual] iii) Set [Lead Edge Air Level Setting] weaker by every 1 step

・Lock a side guide at machine front. ・Set both of Lead Edge Air Level/Side Air Level weaker. * For the size like B5S, A5S (182mm or less width) and 257gsm or heavier paper.

i) Lock the side guide * Lock a side guide at front only. When both sides are locked, thick paper feed failure may occur due to the friction of the paper.

*By locking, the duct opening is narrowed →Separate air speed increase and paper separation performance is enhanced * By locking only front side, minimize the increase of friction [Before locking side guide] [After locking side guide] ii) Change the air assist setting for the tray to [Manual]. iii) Set both of the [Lead Edge Air Level Setting]/[Side Air Level Setting] weaker by every 1step.

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d)-3 For Symptom 2 Insufficient separation

Floating sheets are not separated

Floating sheets are partly not separated

• Check the paper floating conditions

• Side air level: Set stronger. *Applicable for the 176g/m2 or less paper

i) Check the air level. ・ Press [Paper Setting]→[Tray*]→[Air Assist] to access air level setting screen ・ When [Side Air Level Setting] is set to 9, go to countermeasure 2 (lock the side guide) ⅱ) Change the air assist setting for the tray to [Manual] ⅲ) Set the [Side air level Setting] stronger by every 1 step.

・ Lock the side guide. * Applicable to the paper with the 177g/m2 ore heavier

・ Lock the side guides ・ Lock both guides at front and rear.

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d)-4 Symptom 3 case Sheets floating state at symptom 3

1st sheet is send back to the upstream and sticking

・Set the lead edge air level weaker.

i) Change the air assist setting for the tray to [Manual] ii) Set [Lead Edge Air Setting] weaker by every 1 step. e) Conveyance failure e)-1 Leading edge gets ∩-shape curl Leading edge gets ∩-shape curl

Floating sheets are declining: Leading edge of the floating sheets is lower than others

• Check the paper curl direction in the tray

• Set the paper upside down

• Lead edge air level: Set weaker

i) Change the air assist setting for the tray to [Manual] ⅱ) Set the [Lead Edge Separation] by every 1 step.

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f) No feed f)-1 When humidity is high

• Turn ON heater (Installation of HT-506 is necessary) * Especially for coated paper and smooth surface plain paper

i) [Utility]-[User Setting]-[System Setting]-[Paper Tray Setting] -[Dehumidify Fan Heater] ii) [Fan Heater Control (Tray**)]＝[Auto] (Coated paper) [Compulsively ON] (Plain, Fine paper) f)-2 Leading edge gets ∩-shape curl Leading edge gets ∩-shape curl

Floating sheets are declining; Leading edge of the floating sheets is lower than others.

• Check the paper curl direction in the tray

• Set the paper upside down

• Lead edge air level: Set weaker

i) Change the air assist setting for the tray to [Manual] ii) Set the [Lead Edge Air Level Setting] weaker by 1 step.

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3.1.1. Printer gamma offset automatic adjustment does not complete normally after trying several times (1) Symptom Though performing Printer gamma offset automatic adjustment, it does not success: Service mode [Machine Adjustment] → [Quality Adjustment] → [Printer Gamma Adjustment] → [Printer Gamma Offset Auto]. (2) Cause Some of image cannot be adjusted with printer gamma offset automatic adjustment if it is outside of adjustment range.

(3) Solution The maximum number to repeat Printer gamma offset auto adjustment should be 5 times. If the adjustment does not complete normally, perform Printer gamma offset adjustment instead. Perform [Printer Gamma Offset Adjustment] only for the screen failed to adjust with the automatic adjustment in 5 screens

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3.1.2. Print job is not accepted while machine indicates dehumidifying (1) Symptom The machine indicates dehumidifying and print job is not accepted for a while. Optional HT-503(PF602m)/HT-506(PF707) is equipped. (2) Cause When dehumidifier heater is installed to the tray to enhance coated paper feeding ability under high humidity environment (humidity is 56% or over), printing is not accepted until the sensor in the tray detects certain temperature with the default setting. For example, even dehumidifying completes once then the tray is pulled out, “dehumidifying” is displayed. (3) Solution Change the setting of DipSW18-4 Print during temperature control by dehumidifier heater from 0: Prohibited → Allowed The machine receive print job even during the warming up of dehumidifier heater. Note • Since dehumidifying operation does not complete, no feed jam of the coated paper under high humidity tends to occur. • Even under high humidity environment, no feed occurs mostly on coated paper. Therefore, dehumidifying is performed only for coated paper.

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3.1.3. Notes of updating the FW from earlier than ver1.5 (Scan Address/E-mail Title & Text) (1) Symptom When updating the FW I0-G00-15 or later from earlier than ver15 (G00-15), the registered Scan Address and E-mail Title & Text become abnormal. (a) [Scan]→E-mail]→[Option Setting]→[Title Setting] ([Utility]→[Scan Address Register]→[E-mail Title Setting]) →The setting is deleted due to referring the [Group] Setting data after updating FW.

(b) [Scan]→[E-mail]→[Option Setting]→[Text Setting] ([Utility]→[Scan Address Register]→[E-mail Text Setting]) →The setting get abnormal due to referring to the text of [Group] Setting after updating FW. (Display is garbled.)

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(c) [Scan]→[WebDAV](New function from ver1.5) →[WebDAV] address setting is set abnormally due to referring to the registered text of [Email Title Setting] and [E-mail Text Setting] after updating FW.

(d) [Scan]→[Group] →[Group] setting is deleted due to referring to the blank area after updating FW. Before ver.up

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After ver.up

(2) Cause The function of "Scan to WebDAV" has been added at ver 1.5 on bizhub PRESS C1070 series. But some referring data area of Scan Address mistakenly have moved due to inserting WebDAV Address data area. So, some registered address and text are not linked correctly and abnormal text or symbol is displayed after updating the FW. (3) Solution  Confirm original setting of [E-mail]→[Title Setting]/[Text setting],[Group] from the customer.  KMI recommended to record these setting before updating FW.  Delete all abnormal setting of [E-mail]→[Title Setting]/[Text setting],[WebDAV]. Register the original setting of [E-mail]→[Title Setting]/[Text setting],[Group]. Table of contents

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3.2.1. C-2451, C-2452, C-2453 and C-2454 occur (1) Symptom C-2451, C-2452, C-2453, C-2454 or carrier attachment may occur when performing the Toner Density Sensor Init adjustment at developer replacement and machine setup. (2) Cause The charging corona unit is not installed correctly. The charging corona unit is not installed or half installed. (Charging output OFF) →Since the drum cannot be charged and machine keeps creating solid image, the toner density is largely reduced and SC occurs. -The charging corona unit is half installed. (Charging output ON / Grid output ON) →Since the drum potential is low and machine keeps creating image, the toner density is reduced and SC occurs. -The charging corona unit is half installed. (Charging output ON / Grid output OFF; not fitted firmly) →The drum is abnormally charged and carrier attaches. (3) Solution Please check charging corona’s fitting condition at the machine setup, developing unit / charging corona replacement and cleaning. Firmly set the charging corona unit until it is locked at the upper position. However, be careful so as not to transform with strong push.

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3.2.2. C-3102 ADU wiring connector is disconnected (1) Symptom C-3102 occurs because a connector for ADU wiring (A50UN155/N156) is disconnected. (2) Cause By repeating the pulling out and pushing back the ADU mount, A50UN188 may get tensed too much and is caught by the connector for the A50UN155/N156 wirings. Consequently, it is disconnected and C-3102 may occur. (3) Solution 1. Move the red binding band for the A50UN155/188 to left side by 10 to 20mm (blue area) from the base line as shown in the figure. 2. Seat the A50UN188 connector to rear side and the A50UN155 connector to front side. To see the position easily, remove the wiring protection cover and the process mount cover. [Top view]

Rear side Base line A50UN188

Right

Left 10mm A50UN155

20mm

Front side Wiring protection cover

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Process mount cover

[Rear view]

A50UN15 10mm 20mm

Base line

A50UN1

Note When the red binding band for A50UN155/188 is at the right from the blue area, move the wirings to the arrow indicated direction.

When moving the wirings, intermediate conveyance guide plate should be removed.

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3.2.3. C-4521, color registration unit is not positioned correctly. (1) Symptom After setting the process mount and turning on the power switch of the machine, C-4521 may occur. (2) Cause Color registration unit is stopped by the side plate edge of the intermediate transfer unit to keep correct position. If the color registration unit stopper moves inside of the intermediate transfer unit side plate, position is wrong.

(3) Solution Referring to the check location in the figure below, check whether the process unit is correctly set. If not, pull out and pushing back the unit again.

Check here

Process mount

Intermediate transfer unit Color registration unit

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(a) Correctly set state

Intermediate transfer unit side plate edge

Stopping at the edge

Color registration unit stopper contact with side plate of the intermediate transfer unit

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(b) Wrongly set state • Color registration unit stopper enters inside intermediate transfer unit.

• Color registration unit stopper completely enters and there is no space at circled position.

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3.2.4. C2455/C2456/C2457/C2458 Toner density abnormality(High density) occur (1) Symptom C-CodC2455(Y)/C2456(M)/C2457(C)/C2458(K)（Toner high density abnormality） occur. (2) Cause  During long-run low coverage print, Toner charge is deteriorated due to lubricant attached to toner. Developer level became deteriorated due to Toner charge deterioration and Toner density sensor judges low after that Toner supplied.  It rotates above, Toner density becomes high.  After that, Toner high density occurs as Toner density sensor judges high, attached lubricant toner is consumed, Toner charge and Developer level becomes normal. (3) Solution 1．Update FW ver.17 or later. 2．Replace Developer which occurred C-code. 3．Execute toner band creation function(YMCK 5%). By using toner band creation function, the toner is regularly ejected from the developing unit, and fresh toner is supplied. When the less than YMCK 5% coverage is printed continuously, toner band is created on the intermediate transfer belt to keep minimum coverage becomes YMCK 5%. Toner band creation

Dip SW

Set

Default

YMCK : 5%

44-5 44-6

1 1

0 0

Side effect: Toner band creation setting reduces the productivity (Reduce by max 10% for A4 conversion) and increases toner consumption at low coverage printing. When the intermediate transfer CL blade count reaches more than half, the cleaning failure may occur. Note To prevent 2nd transfer roller getting toner dirt from toner band, change the DIPSW for 2nd transfer unit pressure release setting. DIPSW59-7 : 1 (Default: 0)

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3.3.1. Options cannot be recognized. System configuration display without options (1) Symptom If replacing the option unit and the large connector is disconnected immediately after the main power is off, the control board of the option unit may be damaged. If this occurs the operation panel displays the system configuration without the faulty option. (2) Solution Last of all, disconnect the large connector when you detach the option unit. First of all, connect the large connector when you attach the option unit.

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3.3.2. How to eject developer (1) Outline When the developing unit caused image failure occurs, eject the developer using the developer charger, referring to the following procedure.

Developer charger (coupling D)：A50U3436 Input (2) Procedure 1. Remove 2 screws and release the claws (4 positions) on cover

2.

Disconnect the connector and hook the wirings to the gear cover. Hook the wirings

3.

Upside down the unit so that the developer roller comes to the top.

Eject the developer

Eject the developer 4.

Insert the developer charger jig then rotate arrowed direction (clockwise) in the following

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photo, to drop the developer attaches to the developing roller and around inside the unit. Repeat the step 3. (Never rotate counterclockwise direction.)

(3) Other use example Screwdriver can be connected with the developer ejection jig for easier rotation.

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3.3.3. Image shift (1) Symptom Image is off-centered by 5mm to machine front direction. out of alignment.

Timing, vertical zoom is extremely

(2) Cause (a) Shifting to machine front by 5mm Paper dust etc attaches to the surface of centering sensor and the sensor mis-detects the paper position. Consequently, the registration roller is moved by maximum distance and the image is shifted to front side by 5mm.

Normal

5mm shift to machine front

Feed direction

Feed direction

Image shift

(b) Lead edge timing or CD-magnification is extremely out of standard Paper dust attaches to the surface of centering sensor and the sensor mis-detects the paper position. Consequently, the margin at the lead edge becomes wider.

Margin at lead edge becomes wider

Normal

Feed direction

Feed direction Image shift

(3) Solution Clean the centering sensor and lead edge detection sensor to remove the paper dust. Also clean the registration roller, registration roller dust remover and all conveyance rollers. It is to prevent the attachment of the paper dust to the sensors.

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3.3.4. Hard to pull out process mount (1) Symptom The process mount does not slide smoothly and pulling out and pushing back of the unit is difficult. (2) Cause The grease was not applied to the DU flange at factory then enclosed with the main body. Limited to the initial production, the grease is not applied to the DU flange and enclosed with the main body. Main body S/N

A50UA331G0000223 A50UA331G0000238 A50UA331G0000247 A50UA331G0000295 A50UA331G0000342 A50UA331G0000432 A50UA331G0000440 A50UA331G0000550 A50UA331G0000558 A50UA331G0000577 A50UA331G0000582 A50UA331G0000584 A50UA331G0000588 A50UA331G0000591 A50UA331G0000592 A50UA331G0000593 A50UA331G0000596 A50UA331G0000598 A50UA331G0000623 A50UA331G0000624 A50UA331G0000625 A50UA331G0000635 A50UA331G0000636 A50UA331G0000682 A50UA331G0000689 A50UA331G0000690 A50UA331G0000691 A50UA331G0000702 A50UA331G0000706 A50UA331G0000709 A50UA331G0000714 A50UA331G0000715 A50UA331G0000717 A50UA331G0000725 A50UA331G0000726 A50UA331G0000727

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Spare DU-105 S/N

A5WH0Y0000001 to A5WH0Y0000108 (3) Solution Apply the grease referring to the steps in below. 1. Where to apply the grease Apply to DU flange

DU flange

Apply to the red marked face entirely (whole width, whole circumference). Type of grease Recommendation: the MOLYKOTE®AI-6159 the MOLYKOTE® EM-50L the MOLYKOTE® EM-30L 2. Dip the tip of the precision screwdriver to the grease and apply the grease to the DU flange.

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3. To avoid the lump of the grease, apply thinly.

NG

Lump of grease

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3.3.5. Note for the developing shutter installation work (1) Symptom Following is the important points to fit the shutter to the developing unit at service visit. If it is not installed correctly, the shutter does not close completely and the toner may spill. Make sure to install correctly and check it slides smoothly. (2) Solution How to install developing shutter 1. Remove the tape

tape

spring

shutter 2. Clean the toner outlet

3. Attach the spring

spring

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4. Tilt the shutter aslant then gently press down the seal on the shutter.

seal 5. Return the shutter to horizontal position. prolusion of the shutter.

Insert the shutter while pressing the spring by the

6. Open and close the shutter 5 times and check if it slides smoothly.

Note In case the shutter does not close, pull out shutter while lifting up the claw, and go back to step 2.

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3.3.6. Productivity decrease at first in the morning under low temperature, low humidity (1) Symptom Productivity decreases first in the morning under low temperature and humidity. (Changed from high speed to low speed) (2) Cause C1070 series decreases the speed by one step when the necessary voltage capacity to supply current to the 2nd transfer section is not available. It may occur when turning ON the power switch 1st in the morning under low temperature and low humidity environment + roller count reaches later half. When the machine is in the state, the middle speed is applied for the thin paper printing until starting the next job and productivity decreases. (3) Solution By changing the following DipSW, the speed down can be released. DipSW 5-2 = 0: Speed down depending on the cases (Default) 1: No speed down due to the 2nd transfer output shortage Note The setting does not affect to the mode which decreases speed to keep fusing ability. Depending on the case, color change due to poor transfer may occur.

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3.3.7 Release of productivity down mode for small size print under high temperature (Adjustment of toner band creation cycle for cleaning blade) (1) Symptom When the internal temperature is 35ºC and over and paper width is less than 260mm, the 120mm size toner band (30mm of each color x full length in machine front to rear direction) is created at every approx. 50 pages. So, the productivity is reduced to approx. 97%. (2) Cause Small size print under high internal machine temperature promotes the intermediate transfer cleaning blade wearing. So, toner band is created in shorter interval to prevent too much wearing. (3) Solution When the productivity has the priority over the life of intermediate transfer cleaning blade, the toner band creation cycle can be change. (The cleaning blade wears earlier) DipSW Settings Toner band creation interval can be changed by the following setting. Priority on For high DipSW For A4 width productivity temperature 20-3 0 1 0 20-4 0 0 1

For narrow size paper 1 1

1. For A4 size print (Default setting) Toner band creation interval (by the mileage of the belt)(Unit: mm)) Paper width Internal Remark 260mm and Less than temperature over 260mm 35 ºC and 270,000 13,500 over Default setting Less than 35 270,000 270,000 ºC 2. Priority on productivity Internal temperature 35 ºC and over Less than 35 ºC

Paper width 260mm and Less than over 260mm 270,000

270,000

270,000

270,000

Remark Productivity has productivity. Toner band is reduced. However, the early wearing of the CL blade would occur.

Note The grayed hatched [For high temperature] and [For narrow size paper] is the very individual action and not described in the service manual. Please understand the content well before using the setting. 3. For high internal temperature (& for wide size) Paper width Internal 260mm and Less than temperature over 260mm 35 ºC and 13,500 13,500 over

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・

Less than 35 ºC

270,000

270,000

the wearing is promoted. When the wide size is printed after continuous print of A4size, CL blade wearing is promoted at the area outside of A4 size.

4. For narrow paper Internal temperature

Paper width 260mm and Less than over 260mm

35 ºC and over

270,000

13,500

Less than 35 ºC

270,000

13,500

Remark When the narrow paper is used often and the wide paper is used occasionally, the wearing outside of the paper width may be promoted.

Comparison of the productivity (Reference) 1.

2.

Comparison with the predecessor model (Default setting) Paper width Internal Remark 260mm and Less than temperature over 260mm C1070 series 100% 100% or 97% Productivity is the same or higher on C1070 series for all conditions than 95% C7000 series 100% or 99% C7000 series

Degas productivity by toner band creation cycle

Productivity

Toner band creation cycle 13,500 270,000 97% 100%

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3.3.8. ADU MT lever is very hard to release (1) Symptom ADU MT lever is hard to release and lock. the ADU MT.

Consequently, it is difficult to pull out and push back

Locked

Released

(2) Cause The stopper material attached to the main body got deformed and the lock cannot be set and released.

(3) Solution

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Replace the following part. P/No: A50U830200 1. 2.

Pull out ADU mount Remove the stopper part (A50U830200).

(Screw x 2pcs)

Insert the screwdriver from this space. If the work is difficult, remove the ADU MT.

Stopper part (A50U830200)

Remove 2 screws.

3.

Replace the stopper part.

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4.1.1. Multi-feed of Plain/Fine paper under high temperatureand high humidity (1) Symptom Under high temperature and high humidity environment, when very smooth surface plain paper or fine paper (Smooth finished etc) is fed, the multi-feed occurs. (2) Cause As well as coated paper, when the surface is very smooth and moisture attaches to the surface, paper tends to stick with each other. (3) Solution (1) Set the Dehumidify heater setting to Compulsively ON. [Utility]→[User Setting]→[System Setting]→[Paper Tray Setting]→[Dehumidify Fan Heater Setting]→[Fan Heater Control (Tray**)]→[Compulsively ON] (2) Apply lock to the side guide When the dehumidifying heater is not installed or the fan heater compulsively ON setting is not enough, use the side lock as mentioned below. • Lock the side guide • Lock position is following 2 locations (front and rear)

Side guide unlocked

Side guide locked

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4.1.2. PF-707 Wrinkle on paper (1) Symptom

When the thin paper (up to 91g/m2) is fed from PF-707, the wrinkle appears at the trailing edge of the paper. The symptom occurs more often when the Tray 5 (bottom tray) is used and at the 1st page of a job. (Less occurrence from Tray 3 and 4 (top and middle trays))

Feed Direction

Occur at the trailing edge of the paper. (Random position in the CD) (e.g. 1)

(e.g. 2)

(2) Cause

(a) Wrinkle depressing ability is lowered by the wearing of PFU registration roller. (b) PFU horizontal conveyance roller/1 and 2 gets worn and the speed difference occurs between registration roller. At the Tray 5 (bottom tray), the paper lead edge posture is more unstable than Tray 3 and 4 and the symptom occurs more often and worse. (3) Solution

1.

Change tray When the symptom occurs at Tray 5 (bottom tray), use the Tray 3 (top tray) and Tray 4 (middle tray)

2.

Change PFU pre-registration loop amount Decrease PFU pre-registration loop amount.

3.

Replace PFU registration roller and horizontal conveyance rollers 1/ and /2. Replace all of the 3 rollers as a set. The rough indication of the replacement is around 1 million pages feeding.

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4.1.3 PF-707 Paper skew of small size (1) Symptom When small size is fed (the auxiliary guide applied size), paper skew becomes larger. (2) Cause In case the auxiliary paper guide is used, when the air blows, the paper gets on the gap between belt unit and auxiliary guide. (3) Solution Insert the PET sheet to block the gap between belt unit and auxiliary paper guide. Attach the PET sheet referring to the following procedure. - PET sheet attachment procedure 1. Remove the small cover. Pull out the tray to modify and remove the front cover (2 screws)

Small cover

2. Remove the auxiliary lift up plate (one each at front and rear) Remove the auxiliary lift up plate, one each at front and rear (one screw each)

Remove the auxiliary lift up plates.

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3. Temporarily fix the PET(190x20(mm)). Be sure to attach the PET sheet to the auxiliary guide at machine rear first. Pull out the auxiliary guide machine rear. Peel off the release sheet of the PET and temporary attach the top part. While the temporary attachment, the top 2 to 3mm should protrude as shown below.

Base line

4.

Set the side guide at the most inner position.

(Narrowest width)

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5. Decide the distance between PET and paper feed suction belt. While looking through the window which is prepared at step 1, slowly insert the tray until the PET attached at step 3 approaches to the nearest position from the paper feed suction belt (should not contact). Target is less than 0.5mm. However, if the PET sheet contacts with the belt, the belt breaks.) If the PET contact with the belt, reduce the protruding distance.

6.

After deciding position at top position, attach rest of the PET sheet to the bottom.

7. Attach PET to front side Repeat the step 3 to 6 work for the auxiliary guide. 8. Reinstall the removed parts Attach the auxiliary lift up plates removed at step 2 and tray small cover removed at step 1. Note When the thin paper (up to approx. 90g/m2) is fed, the edge of paper may be caught by the PET sheet and chain feed or multi-feed may occurs. Table of contents

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4.1.4 PF-707 Corner fold (dog ear) and conveyance JAM of small size (1) Symptom When using the small size (Width near to B6S, 5.5x8.5S), the corner of the lead edge side is folded (front side is folded down side) Caused by the corner folding, conveyance JAM occurs at the downstream of the PFU tray exit.

Corner folded location Feed direction

(2) Cause When the edge of the paper is not suctioned by the belt, this part sags due to the air from the lead edge. When the paper is conveyed with this state, the paper edge hits the tray and the paper corner are folded.  The symptom occurs only with the paper which cannot be suctioned (B5S, 5.5x8.5S etc) (Indicated in red line in the figure below)  If the edge of the 1st sheet is lifted up by the floating 2nd or later sheet, the symptom does not occur. (Blue line in the photo below)

Suction belt unit

1st sheet (Not occurring)

1st sheet (dog-ear occurs)

2nd or later sheets (lift up the 1st sheet)

The condition symptom tends to occur  High humidity environment (moisture slows down the 2nd and later paper to float)  Paper weight 91g/m2 or less (especially, when it is not stiff enough, the edge of paper sags) (3) Solution To reduce the power to push down the paper edge, set 1 or more step(s) lower value for the Lead Edge Air Level Setting than Auto setting. [Machine] →[Paper Setting]→[Change Set] →[Air Assit]→[Manual]→[Lead Edge Air Level Setting] See paper behavior and decide the optimum value. Table of contents

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4.2.1. J-1710 countermeasue (1) Symptom Frequent jam (J-1710) occurs during paper registration because next sheet overruns. (2) Cause The overrun tends to increase if these clutches become loose due to the load of the brake for PFU horizontal conveyance & for intermediate conveyance of main body. Then, when the overrun becomes larger than threshold, the jam occurs. (3) Solution 1. Permanent solution for mass production line(PF-602m) 1. Torque limiter has been added to the drive section for the pre-registration roller. This reduces distance of the overrun. Note: It is not compatible with the old type PFU because it affects machine frame design. 2. Material of the pre-registration roller has been changed to non-magnetic type. Because the clutch performance decreases once it gets magnetized. 3. Schedule Machine: PF-602m Applied date: 4th July 2014 Cut in: A0U4WY2000889 NOTE: C1060/C1070 has added with another counter measure from the beginning of the mass production.

2. Solution for MIF 1. Attach the brake kit to intermediate roller of main body & pre-registration roller of PFU.(TNBT1300331JP) For Main body: C7000/6000 brake kit p/n: A1DUR90200 For PFU: PFU brake kit p/n: A0U4R90100 If you need to apply the torque limiter to the old type PF-602m, the whole horizontal conveyance assy should be replaced; Part: Whole of the horizontal conveyance Assy p/n: A0U4R70100. NOTE: A0U4R70100 is only available for PF-602m(A0U4WY2) It is not available for PF-602(A0U4WY1) 2. For PFU, replace pre-registration roller to non-magnetic type.

For PFU:Part: Registration Roller /Lower p/n: A0U4711000 NOTE: Recommend replace a pre-regit clutch at the same time. Subject Model Main body: PFU:

bizhub PRESS C7000/C7000P/C6000/C70hc bizhub PRESS C1070/C1070P/C1060 PF-602/PF-602m

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Refer to following applicable PFU for each countermeasure parts

Horizontal conveyance assy Pre-registration roller

Counter measure Parts for overrunning. (Torque limiter / Brake kit)

PF-602 (A0U40Y1/A0U4WY1) PF-602m (A0U4WY2) Before Modified PF-602m (A0U4WY2) Modified *4

Couter Measure ASSY for PF602m

Regist Roller (Non-magnetic type)

Brake Kit

(Replacing whole ASSY)

(Replacing Part)

(Mounting Part)

Counter Measure Parts about Torque limiter (Replacing Part)

A0U4R70100

-

-

-

-

A0U4711000

-

-

-

-

A0U4R90100

A0U4A71200 *2 A0U4R70100 56AA17471 56AA40490 A03U850101 A0U4719500 A0U4719600 A0U4R70300

N/A *1*3

(OK)*3

OK

N/A*3

OK

(OK)*3

OK

N/A*3

OK

OK

-

OK

OK=Available to replace, N/A=Not Available to replace, but not guarantee due to lack of evaluation.

(OK)=Available to replace,

*1 PFU Drive board for PF-602(A03XH01017) is not available to attach with the new horizontal conveyance assy(A0U4R70100). The new horizontal conveyance assy(A0U4R70100) is only compatible for PFU Drive board for PF-602m(A0U4H02000). *2 These parts are hard to assemble because it is frame of its unit. *3 It is not guaranteed due to lack of evaluation. *4 Cut in S/N : A0U4WY2000889

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3. Procedure of mounting new solution

Component Parts

Parts number name A1DUR90200 C7000/C6000 Brake Kit

Component Brake Plate (ADU) Brake Spring Bearing Screw M3x12

A0U4R90100

A0U4711000

PFU Brake Kit

PF-602 Registration Roller /Lower

Brake Plate (PF602) Brake Spring

Quantity Remarks 1 For Main Body 1 Common for Main Body and PFU 1 Common for Main Body and PFU 1 Common for Main Body and PFU 1 For PF-602/PF-602m* 1

Bearing

1

Screw M3x12

1

Non-magnetic Preregistration Roller

1

Common for Main Body and PFU Common for Main Body and PFU Common for Main Body and PFU For PF-602/PF-602m*

.NOTE: Please make sure the shape of metal plate. It is different between PFU and Main body. PF-602m is planning to modify for mass production line at July 2014. KMI recommend to replace the pre-registration clutch(CL12) at same time.

For Main Body

For PFU

Image 1 :The state of the metal plate only.

For Main Body

For PFU

Image 2 :The state of the metal plate with bearing.

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Mounting procedure (For Main Body) Component

Metal plate

Spring

Bearing け

Attach to the roller shaft of the right rear side at ADU.

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1.

Remove a duplex section cover Rt.

2.

Remove a intermediate conveyance clutches/2 (CL4) and a bearing for intermediate conveyance roller/2.

Remove a intermediate conveyance clutches(CL4) and E-ring, bearing for intermediate conveyance roller/2.

3.

Change a screw and remove a bearing of rear side.

Rear side of ADU

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Change a screw from (M3x6) to (M3x12) . *Original screw(shorter) => New screw(longer)

Note : Do not touch the lower screw. (It has no relation with this modification.) Remove a bearing of intermediate conveyance roller/2. 4.

Attach a countermeasure jig (bearing & metal plate) to shaft of intermediate conveyance roller/2.

Slide the shaft to machine front direction. And then attach a countermeasure jig (bearing & metal plate). Reinstall the original bearings (front/rear).

Attach a spring

5. 6.

Please mind the attaching direction of the bearing.

Attach a spring to countermeasure jig and replaced screw. Reinstall the intermediate conveyance clutches/2 (CL4) and duplex section cover.

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Mounting procedure (For PFU) Component

Metal plate

Bearing け Spring

Pre-registration roller / Attachment points

This photo is showing from the bottom side of the horizontal Conveyance unit.

Front

Rear

Refer: The position is the roller of PF4 knob.

Attaching position

Replace the registration roller to nonmagnetic one. 1.

Remove the Horizontal Conveyance unit of PF-602 Refer to Service manual v4.0 page G55-G56 "4.2.10 Horizontal conveyance unit"

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2.

Change a screw and remove a bearing.

Remove a bearing of Preregistration roller.

PFU602_Front side

PFU602_Rear side Change TP M3x6 to TP M3x12

3.

Replace pre-registration roller.

4.

Attach a bearing & metal plate to shaft of pre-registration roller.

Slide the shaft to machine front direction. And then attach a countermeasure jig (bearing & metal plate).Reinstall the original bearings (front/rear). 4. Note: Please mind the attaching direction of the bearing and the plate. - 198 -

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5. Hook a spring to the metal plate.

Hook a spring to metal plate and the screw replaced at step 2. Note: Please mind the attaching direction of the bearing and the plate.

Note: Straight edge must contact with paper guide plate

6.

Reinstall the Horizontal Coveyance unit.

7.

IMPORTANT: Update to the following FW C7000 :ver.C-GMZ-40(GPZ-40/GQZ-40) or later. (CSES ID:DLBT1406822EN) KMI recommend to update for ver.I0-GD3-40 or later at the same time. C1070 : ver.C-GM5-12 or later. (CSES ID: DLBT1407227EN) KMI recommend to update for ver.I0-GC3-11 or later at the same time.

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4.3.1. Irregular correspondence of the main tray exit (1) Symptom The exit unalignment in a main tray occur due to electrostatic adsorption or electrostatic repulsion. (2) Cause The neutralizing effect of the neutralizing brush adopted as dirt of paper leading edge correspondence may not fully be acquired. (3) Solution Replace of the neutralizing brush of a main tray exit part. Change part relative table Present A4F37179(Q'ty2) A4F37180(Q'ty 1)

Replace parts A4F38999 (Q'ty 2) A4F38998(Q'ty 1)

Replacement procedure 1. The main power switch turned OFF. 2. Remove the FS-532 from system. 3. Remove the outer cover following "G Disassembling/Reassembling" of the service manual. 4. ・ When PI-502 is connected PI-502 1. It removes, when PI-502 is connected.

Remove the cover(2 screws)

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・When PI-502 is not connected 1. Loosen 2 screws.[1] 2. Remove the upper cover/Rt1[2] in the arrow-marked direction.

3. Remove the rear cover. 4. Remove 2 screws[1]. 5. Open the front door[2], remove 2 screws [3] and then remove the upper cover/Rt2[4].

5. Remove 3 screws [1] and remove the upper cover/Fr1 [2].

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6. Remove the front door. Remove 7 screws [1]. 7. Disconnect the connector [1] and remove the upper cover/Fr2 [2].

8. Remove 3 screws [1] and then remove the upper cover/Rr [2.]

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9. Remove the upper cover/Md. 10. Remove 4 screws [1], and remove the sub tray [2].

11. Remove the exit part cover.

Exit part cover

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12. Remove the 2 screws from the inside of a machine.

13. It removes, while rotating a cover.

14. Replace and stuck of the neutralizing brush. Change part relative table Present A4F37179(Q'ty:2)

Replace parts A4F38999(Q'ty:2)

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A4F37180(Q'ty:1)

A4F38998(Q'ty:1)

A4F37179⇔A4F38999

A4F37180⇔A4F38998

A4F37179⇔A4F38999 Attachment standard

A

C

B

A section detail view

Punch mark standard

Sheet metal edge standard B section detail view

Punch mark standard

Sheet metal edge standard C section detail view

Punch mark standard

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Sheet metal edge standard 15. Assembly Reinstall the preceding parts following the removal steps in reverse. Table of contents

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