US-751 Service Manual: Ito Co., Ltd. 1st Edition [PDF]

Zitiervorschau

US-751

Service Manual

ITO CO., LTD. 1st Edition

US-751 Repair Information Menu Clicking the blue colored character in this page can enter the page where detail information is written.

1. Specification & Circuit Concept

Index Product outline

Specification(General)

Specification(Mechanism) Trouble Shooting

Function

Inspection Procedure

Specification (Ultrasound) Block Diagram

Spare Parts

Error Messages

FAQ

Adjustments

2. Assembly / Disassembly

LCD & Upper Case

Lower Case

US-751 Table of Contents Contents

Page

1

Product Outline

1

4

Specification

3

5

Used material

7

6

General specification

8

7

Notes for operation and usage

9

8

Dimension and parts name

10

9

Overall Block Diagram

12

10

Block Diagram (+B line No1,card)

13

11

Block Diagram (+B line No2,card)

14

12

Block Diagram (+B line No4,card)

15

13

Block Diagram (Signal Path No1 card)

16

14

Block Diagram (Signal Path No5 card)

19

15

Spare parts

20

16

Trouble shooting

21

17

Error messages

25

18

Disassembly procedure

26

19

Ultrasound Power Measurement

35

US-751 Product Outline 1. Outline US-751 is a dual frequency ultrasound therapy device designed for overseas use only. The standard probe is the L-type ultrasound probe which delivers the two frequency outputs of 1MHz and 3MHz. Gel and the L-type probe are also supplied as the standard accessories and the the S-type probe and the EST cable are provided as the option. 2. Purpose of use / expected efficacy or effect. Microscopic massage, pain relief of muscles and joint.

US-751 is composed of 8 PCBs as shown in the below table. The contingent measure for failure is basically changing the defective PCB and module. REF 1 2 3 4 5 6 7 8 9

PCB name No.1 PCB (DCN) No.2 PCB (SW) No.3 PCB (Encoder) No.4 PCB (US) No.5 PCB (US probe (L)) No.5 PCB (US probe (S)) No.7 PCB (AC line filter) No.8 PCB (EMC filter) No.9 PCB (AC filter)

Description Controls LCD display and touch panel. Controls ultrasound output Encoder mounted board US output board Main board inside L probe Main board inside S probe Power filter US output filter board Power filter board

1

US-751 Specification (1) No. 1 2 3 4 5 6 7 8 9 10

Main unit and accessories Name Classification Quantity Main unit Standard 1 Power cord Standard 1 Ultrasound probe (L) Standard 1 Ultrasound probe (S) Optional 1 Probe holder Standard 1 Therapeutic gel Standard 1 E.S.T cable (Type A L) Optional 1 E.S.T cable (Type B S) Optional 1 User manual Standard 1 ferrite core Standard 1

Remarks New specification Type differs by country

New specification

Electric specification Power supply voltage

AC100 - 240v +/-10%

Power supply frequency

50 / 60 Hz

Power input

Less than 85vA +10%

Type of medical equipment

Class II , MDD Class IIa IEC, JIS category Class I BF

Display

7 inch color LCD with touch panel Open error: Generated when probe is disconnected during output.

Error function

Probe error: Generated when abnormal connection of probe is detected. System error: Generated when the main CPU found abnormal communication with boards.

2

US-751 Specification (1) Two types of frequency of 1 MHz and 3 MHz are provided. ・Ultrasound output: The maximum frequency according to sales regions is shown below. The values in ( ) are in pulse mode.

IEC FDA

Ultrasound probe (L) 1 MHz 3MHz 10.0W 10.0W (15.0W) (15.0W) 11.0W 12.0W (16.5W) (18.0W)

Ultrasound probe (S) 1 MHz 3MHz 1.4W 1.0W (2.1W) (1.5W) 1.8W 1.8W (2.7W) (2.7W)

(2.0W/cm2 MAX in CW mode) *Deviation: within +/-20% when output is above 0.2W/cm2 (3.0W/cm2 peak-peak MAX in Pulse mode) *Deviation: within +/-20% when output is above 0.3W/cm2 The output adjustment is available through encoder and menu by 0.05W/cm2 step. ・Vibration frequency:

a) Ultrasound probe (L) 1MHz +/-10% 3MHz +/-10% b) Ultrasound probe (S) 1MHz +/-10%

3MHz +/-10%

・Transducer: Installed inside of the probe head. The ultrasound probe (L) and (S) is selected according to the parts of therapy. In addition, the auto contact function enables output, only when the probe head is in contact with tissue. When output, the LCD window, the front panel LED and the probe LED indicates the output. ・ERA/BNR: ERA, BNR and emission characteristic are shown below. ERA tolerance is +/-20% and BNR tolerance is +/-30%.

ERA (cm2)

IEC FDA IEC BNR FDA Emission characteristic

1MHz 5.0 5.5 3.0 2.9

Probe (L)

3MHz 5.0 6.0 2.4 2.9

1MHz 0.7 0.9 2.9 2.9

Probe (L)

COLLIMATED COLLIMATED COLLIMATED

3MHz 0.5 0.9 2.4 2.9

COLLIMATED

・Timer: 1-30 minutes (set by minutes step. Deviation: 30 minutes +/-1 minutes) *If timer setting is changed during operation, counting will restart from the beginning.

3

05W/cm2 step.

L) and (S) is

4

US-751 Specification (2) ・Pulse frequency: Duty cycle at 16Hz/48H/100Hz Duty 16Hz 48Hz 100Hz

100% Continuous Continuous Continuous

50% 31ms 10ms 5ms

40% 25ms 8ms 4ms

30% 20% 19ms 13ma 6ms 4ms 3ms 2ms * Deviation +/-5%

10% 6ms 2ms 1ms

5% 3ms 1ms 0.5ms

・Output stability: +/-20% ・Other functions A) Auto contact function During ultrasound therapy, the impedance change of the transducer is used to judge the contact/no contact (or in water/in air) of the probe head with the tissue. In the contact (in water) state, the probe performs output as is set. In the no contact (in air) state, output goes into standby mode and weakens the output slightly. When output, the LCD window, the front panel LED and the probe LED indicate output. . Also, therapy stops if output standby status lasts for 3 minutes. 2.4 Output waveform

・Vibration frequency: 1.9MHz / 3.0MHz +/-10% ・Pulse frequency:

16Hz / 48Hz / 100Hz +/-5%

・Duty:

5, 10, 20, 30, 40, 50, 100% Variable in +/-5%

2.5 Envirnmental condition ・Usage environment: 10℃　to 40℃、30% to 70%, 700 to 1060hPa ・Storage environment: -10℃　to 60℃、30% to 95%, 800 to 1060hPa ・Transport environment: -10℃　to 60℃、30% to 95%, 800 to 1060hPa

5

US-751 Specification (3)

ITEM

SPECIFICATION

Dimension

90mm(W) x 23mm(D) x 93mm(H)

(Including leg: 96mm)

Weight

About 3.0kg

Intensity

In accordance with the design standard of ultrasound therapy device for business purposes "84E-0019" Device ……… 5years

Mechanical life

Accessary……3 years (except consumable items such as therapeutic gel) Consumable.. therapeutic gel

6

US-751 Used material 1. Raw material (1) Main body Name Case LCD Output control VR Stop switch Ultrasound probe socket Power switch AC power cable inlet E.S.T cable socket LED AC power filter

Used material Synthetic resin General electric parts General electric parts General electric parts General electric parts General electric parts General electric parts General electric parts General electric parts Synthetic resin

(2) Power cable

Synthetic resin

Ref 1 2 3 4 5 6 7

(3) Ultrasound probe Name Transducer Case Cable Plug Code protector Output indicator Core filter

Used material Titanium alloy or Aluminum alloy Synthetic resin Synthetic resin Synthetic resin or elastomer Polyamide resin General electric parts Ferrite, Nylon cover

Ref 1 2

(4) Probe holder Name Probe holder Lid

Used material Synthetic resin or Silicon Synthetic resin or Silicon

(5) Treatment gel

Aquasonic 100 gel 250ml

Ref 1 2 3 4 5 6

(6) E.S.T cable (Type A: Large) Name Output connector Code Core filter Core filter Rectangular connector Φ２　plug

Used material General electric parts Synthetic resin Ferrite, Nylon cover Ferrite, Nylon cover General electric parts Brass Nickel plating pin

Ref 1 2 3 4 5

(7) E.S.T cable (Type B: Small) Name Output connector Code Core filter Rectangular connector Φ２　plug

Used material General electric parts Synthetic resin Ferrite, Nylon cover General electric parts Brass Nickel plating pin

(8) Ferrite core

General electric parts

Ref. 1 2 3 4 5 6 7 8 9 10

7

US-751 General information Operation theory US-751 is a ultrasound pain relief device utilizing thermal and non thermal physiologic reaction of the tissue which is caused by the delivered ultrasound of the device. US-751 generates the two frequency of 1MHz and 3MHz of which their level are controlled by the level controller circuit and drives the transducer to inject the ultrasound vibration to treat the affected tissue. The power of each circuit are supplied from commercial AC which is converted to DC in the power regulator. CPU controls output level, timer, error detection, display control, and display functions. LCD and LED display the status of manipulation of touch panel, switches, and encoder. User can select the ultrasound probe from S-type or L-type according to the treatment part. Function of each part 1. Main unit (1) Cover Cover is made of synthetic resin which is insulator. (2) Power supply Converts commercial AC to DC and supply it to the circuit. (3) Display control Displays the status of manipulated switch and touch panel. Communicates with the CPU in the ultrasound probe (L & S) to control the ultrasound output level, display error, and identify probe type. Generates 1MHz or 3MHz, drives the output power circuit to deliver the ultrasound to the probe. Detects the phase to control the frequency of the ultrasound while detecting voltage and current of the ultrasound to control the output power source. Communicates with the display controller and the CPU of the ultrasound probe to exchange error information and others. The output VR increases or decreases the ultrasound output. (4) Ultrasound probe (L) / (S) Converts the ultrasound signal to the ultrasound vibration for treatment which is irradiated to the treatment part.

8

US-751 Notes of Operation and Usage 1. Usage (1) Parameter setting. LCD touch panel is used to select, change, or set the output parameters. (2) Intensity setting of the LCD LCD touch panel is used to set the LCD intensity. (3) Starting output Rotation of the output controller VR or manipulation of the LCD touch panel starts output. LED of the ultrasound probe (L,S) will light up while the probe head touches on the skin properly. (4) Stop of the output Pressing the STOP switch stops the output. 2. Low frequency combination treatment (1) US-751 is able to perform the combination treatment with low frequency treatment equipment and low frequency treatment/interference current type low frequency combination physio therapy equipment. For the use of combination treatment, connect the E.S.T connector of US-751 to low frequency treatment equipment with the dedicated E.S.T cable. Connect low frequency electrode pad to the ƒ³2 plug, connects the square connector to the E.S.T cable outlet of US-751 and connect the output connector to the low frequency therapy equipment. Note: The low frequency electrode pad is electrically plus (+) and the ultrasound probe is minus (-). Please maintain the low frequency electrode pad distance from the ultrasound probe head. 3. After use (1) Clean the probe head and keep it in a dry place.

9

US-751 Dimension and Parts name (1)

Ref. No.

Name

1

Main body case

2

LCD with touch panel

3

Output control VR

4

Stop button

5

Ultrasound probe socket

6

Power SW

7

AC power cable inlet

8

EST cable inlet

9

LED

10

Power filter

10

US-751 Dimension and Parts name (2) (1) AC power cable No.

mm

Name

1

Plug

2

Code

3

Connector

(2) Ultrasound probe (L) No.

Name

1

Transducer

2

Case

3

Cable

4

Plug

5

Code protector

6

Output indicator

7

Core filter

mm

(3) Ultrasound probe (S) No.

mm

11

Name

1

Transducer

2

Case

3

Cable

4

Plug

5

Code protector

6

Output indicator

7

Core filter

US-751 Dimension and Parts name (3) (4) E.S.T. cable TypeA (Large) mm

(2) Ultrasound probe (L)

No.

Name

1

Output connector

2

Code

3

Core filter

4

Core filter

5

Rectangular connector

6

Φ２　plug

(5) E.S.T. cable TypeB (Small) mm

No.

Name

1

Output connector

2

Code

3

Core filter

4

Rectangular connector

5

Φ２　plug

12

US-751 Overall Block Diagram

No.9 board

No.6 board

US-751 Block Diagram (+B Line No.1 card)

CN3 1 2

TP2: +3V

TP36: +5V

TP25: +15V

U1 DC Reg

U6 DC Reg

Touch panel TP26: +3.3VPLL

TP38: +3.8V

U10 DC Reg

LCD Backlight TP28: +3.3V

LCD Controller LRC_VccPLL LCD Controller ULC_VccPLL TP29: +2.5V

U8 DC Reg

U7 DC Reg

LCD Controller Vcc

TP42: +1.2V U11 DC Reg DIPSW U2 Vcc LCD Controller Vcc LCD Controller IO Vcc LCD Controller Aux Vcc U9: RES LCD

14

LCD Controller Vcc

US-751 Block Diagram (+B Line No.2 Card)

from Power Supply

CN1 1 2 3 4

TP51: +3.3V

TP54: +5.5V

TP52: +15V

U5 DC / DC

U4 DC / DC

Inv. +3.3v

TP55: +3.3V U6 DC / DC CN7

1 2

U3 SP Drive

Sound SW

No.4 Card (US unit) No.1 Card (DCN)

15

DC Fan Encoder 1, 2 EST STOP SW CPU OSC CPU TX CPU RX CPU Vdd

US-751 Block Diagram (+B Line No.4Card) TP61

from No.2

1 2 3 4

TP62: +15v

TP59: +5.7v U33 DC / DC

TP55: -5.7v U36 DC / DC

U35 DC / DC

TP56: -5v U34 DC / DC

Pulse shaping U4,5,10,11

DC Fan TP57: 3.3v

TP60: +5v FB SW Reg U36 DC / DC Under voltage

+V

Pulse Shaping: U4, U5, U10,

U32

CPU

Phase Cont.: U1, U2, U3, U6, U9, U12, U13,

Pulse Gen.: U1, U4, U5, U7, U10, U11 RY1,2,3,4 Coil I DET: Q27,, Q29, Q30

CPU CPU Vref

16

US-751 Block Diagram (Signal Path No.1 Card)

+3.3v

+3.3v

U4 RAM U2 Flash ROM +3.0v

+3.3v PLL

Character Memory

TP3 X1

+2.5v

TP5: Clock U3 LCD Controller

+3.3v

TP4 Touc h Panel

+3.3v

+3.3v TP5

U5 CPU

TP6

1 2 3 4

+3.3v

U9

+3.3v

LCD

14 15 17 18

17

US-751 Block Diagram (Signal Path No.1 Card) +3.3v

TP4

STOP

TP5

1

CMOMBI_DE

2

TP19

+15v LED2 TR1:B TR2:R

COMB U1 CPU

+15v

LED1

TR3:G

+3.3v

3

ES-520 IN

TP20 TP24

4

ES-320 IN

TP81

5

SU520SW-A SU520SW-B

EST

U2 U3 Audio

U7 RESET

U8

18

US-751 Block Diagram (Signal Path No.1 Card)

Switching Regulator Power Source I DATA Q20, Q28,vQ25, Q28, U27 Q29, Q30 Switching Regulator

V Data

CPU

U26, U28, U29, U21, U31 1MHz /

1MHz, 3MHz OSC

Pulse Amp

U16,U19, U39, U17 U18, U14, U15, U6,

U8, U4, U5, U10, U11, U7

P DET U22, U20 U12, U13, U9

19

RY4 Frequency Select 1MHz /

RY1 Chanel Select CH1/ CH2

US-751 Block Diagram (Signal Path No.5 Card) J From No.4 card

1

+15V

2

COM_PR CN_DET

TP7:+15v

TP2

3

TP10:+11v

TP11:+3.3v TP5: 3M SEL

U2 V Reg

D6

Green LED Red LED Blue LED

TP3

4

Q1

Drive+ 5

Drive-

Q2

6 Q3

7 8

D1

TP1

D3

9 L probe

10

TP4 TP15

S probe

20

U1 CPU

Q5

US-751 Spare Parts

Name

No.

Part No.

1

No.1 Card (DNC)

210687

2

No.2 Card (SW)

210668

3

No.4 Card (US)

210670

4

No.9 Card(AC filter PCB)

210688

5

Power unit

080601

6

Upper case cover

200755

7

LCD

070280

8

LCD cushion 2

9

Power switch

140154

10

Motor fan

091534

11

Speaker harness sub-assy

091546

12

Harness 10 (CH1 output connector assy)

091565

13

Harness 13 (CH2 output connector assy)

091567

220506

21

US-751 Troubleshooting (No Power) No Power (1)

Step 1

Check +15 at TP52 of No.2 card.

+15v exists.

No

OK Step 2

DC motor rotates.

Step 3

Step 4

OK Check TP25 of No.1 card.

+15v exists.

Step 5

Change No.9 card or change FU1 and FU2.

Check DC fan drive

No

Change No.2 card.

No

OK Check TP-28 of No.1 card.

Check harness connection between No.2 and No.1 card.

OK +3.3v exists.

No

OK Step 6

Change No.1 ard.

Check TP-28 of No.1 card.

No +1.2v exists. OK Change LCD

22

US-751 Troubleshooting

LCD does not light

Step 1

Check TP25 of No.1 card.

No

+15v exists.

Step 2

OK Check TP-28 of No.1 card.

Check harness connection between No.2 and No.1 card.

OK +3.3v exists.

No

OK Step 3

Change No.1 ard.

Check TP-28 of No.1 card.

No +1.2v exists. OK Change LCD

23

US-751 (No output) No output Change Probe with new one.

Output is relived.

Yes

No

Change probe.

Check TP-61

+15v exists.

No

Ye

Check harness connection between No.4 and No.2 card.

Check TP12 or TP22.

+15v exists No

Yes

Change probe

Change No.4 card.

24

US-751

Auto contact does Confirm that output is normal.

Output is normal. Yes

No

Go to Troubleshooting (No Output)

Change the probe..

25

US-751 Error messages

Open error. Indicates that probe was disconnected from the output terminal during treatment.

Probe error. Indicates that the connected probe has problem. Probe change is required.

System error. Indicates 15v DET abnormality, fan rotation abnormality or circuit misalignment of control board. Indicates abnormality of main fan rotation. Indicates communication error between DCN and US board or between DCN and SW board. 26

US-751 Disassembly procedure (1) Disassembling Procedure Separate the upper case and the lower case

Remove the five screws from the bottom case to separate the upper case and the lower case.

No.2 card

27

US-751 (Lower case)

Disassembly of the Lower Case (1)

EMC insulation

DC Fan Speaker

No.8 (EMC) card

No.4 (US) card

Power supply unit US Fan

No.2 card

28

US-751 (Disassembly No2 & No.8 card) Disassembly of the Lower Case (2) No.2 Card

NC1

NC10 NC2

NC12 NC3

NC7

Remove the six screws, CN1,2,3, 7,9,10,

No.8 Card

CN3

NC9

CN4

CN1 CN2

Remove the four screws , disconnect CN1,2,3,4 to take out the No.8 (EMC) card.

29

US-751 (Disassembly No.4 card) Disassembly of the Lower Case (3) No.4 Card

Remove the harness connecting the No.2 and the No.4 cards.

Remove the four screws to take out the No.4 card.

Disconnect the harnesses from CN2 & CN12 to take out the upper shield case.

Remove the four screws.

Remove the two screws to take out the No.4 card from the shield case.

30

US-750 (Disassembly Power supply unit) Disassembly of the Lower Case (4) Power supply unit

Remove the four screws , disconnect TB1 and TB2 to take out the power supply unit.

Grounding point of the power supply unit.

31

US-751 (Disassembly upper case 1) Disassembly of the Upper Case (1)

Remove the screws.

Remove the screws.

Unlock the fixing

32

US-751 (Disassembly upper case 2) Disassembly of the Upper Case (2)

Remove the screw, pull out the Pull up the upper case.

Disconnect the harnesses, pull out the No.1 card plate.

Peel off the connector by using a cutter.

33

US-751 (Disassembly upper case 3) Disassembly of the Upper Case (3)

Past a new connector on the new LCD board.

Install the new LCD card on the upper case.

34

Ultrasound Power Measurement

Probe holder (Differs by probe)

Probe mounting plate (Differs by probe) Jigs Provided by Ito: Probe holding jigs (Taisei Technical) The tank is filled with de-aired water. Simple method of making de-aired water. (1) Boil tap water for 15 minutes. (2) Cool the water down in the same container used for boiling. (3) Keep the water cool until it becomes room temperature. (4) Pour the water into the tank slowly to avoid catching the air in the water.

Soaks the probe head

Ultrasound power meter Ultrasound Power Meter : Ohmic Instruments Co. 　・UPM-DT-1AV　　　(Locally purchase)

35