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CANTOR Technical Manual

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Technical Manual

Lighting Technologies 1 Lighting Technologies

MT 1070

1106.11.070

CANTOR Technical Manual

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CANTOR Technical Manual

Table of Content Introduction to CANTOR Technical Manual

4

CPU board

4

Surface board

4

Analog output extension

4

CANTOR PCB Description A. CPU CANTOR Board : PCB1264 1. CPU Z180 2. RESET AND WATCHDOG 3. MEMORY 4. I/O CPU DEVICES KEYBOARD MATRIX ENCODER DECODER LEDs MATRIX LCD DISPLAYS DIGITAL TO ANALOG AND ANALOG TO DIGITAL CONVERSIONS AUDIO INPUT B. CANTOR SURFACE BOARD 1. GLOBAL OVERVIEW 2. PCB 1265 24 POTENTIOMETERS 3. PCB 1266 SUBMASTER 4. PCB 1267 CROSSFADE 5. PCB 1268 KEY 6. PCB 1284 SOCAPEX ANALOG OUTPUTS CANTOR APPENDIX 1 A. TEST CANTOR CPU CARD PCB 1264 Ve 1 1. First start-up 2. Start Test Program 3. Initialization of program (normal or test) 4. Tests CPU card B. TEST POTENTIOMETERS AND KEYS CARDS (PCB 1265 to 1268) 1. Visual inspection 2. Start Test program and initialization : see PCB 12640

5 6 6 7 7 8 10 10 10 11 11 12 12 13 14 14 14 14 15 15 15 15 16 17 20 20 20

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Introduction to CANTOR Technical Manual The purpose of the present manual is to provide the maintenance engineer with an insight into the working CANTOR. Obviously the engineer should have an intimate knowledge of microprocessors and related equipments (EPROM, RAM, VLSI, LOGIC GATES). Throughout this manual, the following drawings are referred to:

CPU board: Schematics 3456.08.783

folio 1 to 4 PCB 1264

Surface board: Schematics 3456.08.791 Schematic 3456.08.800 Schematic 3456.08.810 Schematic 3456.08.821

folio 1 & 2 PCB 1265 24 pots PCB 1266 submaster PCB 1267 crossfade PCB 1268 key

Analog output extension: Schematic 3456.08.951

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CANTOR PCB Description The CANTOR is organized around 5 PCBs.

The most important is the CPU board; it contains all the computing intelligence of the CANTOR. The other PCBs are “surface PCBs” holding the human interface included in the desk (keys, LEDs, potentiometers). The CPU board makes the function which are linked to external world (DMX link,display...). To work correctly, he needs 3 supply voltages given by the power supply SNP3034. These supply voltages are : •

5 volt around 1.8 A

•

+ 15 volt around 300 mA

•

- 15 volt around 300 ma, but you must add the lighting desk which can use 300 mA if a “BIGLITE” lamp is used.

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A. CPU CANTOR Board : PCB1264

1.

CPU Z180

The CANTOR uses a Z180 central processing unit. This CPU includes all the possibilities of the famous Z80 and also new additional features. The followings are used: • internal, external clock generator • a memory management unit (MMU) which allows the Z180 to access up to 1024 Kbytes of physical memory partitioned in 3 blocks, but internal manipulations leave on a logical 64Kbytes space. • two channels direct memory access controller (DMAC) • two channels asynchronous serial communication interface (ASCI) with their own baud rate generator • programmable timers • interrupt controller. A quartz of 16Mhz is used to provide the clock signal at 8MHz. This master clock is also used to give different timings to other devices. The ASCI channel 1 of the CPU performs the serial line at 9600/2400 baud. The internal ASCI clock generator can’t be used for this purpose and needs an external divider by 26 (U43) from main 8MHz clock. On old version of PCB 1264, serial messages are sent trough U1 (MC1488) for transmission and from U2 (MC1489) for reception. New generation of PCB 1264 uses a RS232 driver MAX 252 or a NM 232 to isolate RS232 serial communications from main ± 12V supply; in this case maximum baud rate should be limited to 9600 bauds. Note that handshake signals coming from Z180 are buffered and supported by connector J1. 6 Lighting Technologies

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2. RESET AND WATCHDOG The Max 696 (U42) performs the RESET active low and Watchdog function and the RAM memory backup switching. When LLin is under (or falls below) approx. 1.3 volt the reset will be generated. The reset timing is about 50 msec. During reset “activity” Vout is switched to the Lithium backup battery and provides the memory supply. The 10K (R126) pot adjusts the supply RESET level to be about 4,82 volts. If jumper W3 at input WDI of MAX 696 is inserted the Watchdog feature occurs; if no transitions are made at this input by the CPU after the 100 msec reset timeout period, the Max 696 generates a 50msec reset pulse. Leaving input WDI unconnected disables the watchdog feature. The supply level of the lithium battery is checked on reset and a caution message will be sent if found under 2.5 volt. The transistor MOS Q6 switches the battery level on CPU request to ADC converter. If needed the DUBOX connector P12 can replace a temporary defect battery and offers a potential link to a 3 to 5 Volt range external backup supply voltage.

3.MEMORY The CPU can use up to 128 Kbytes of EPROM shared by U41. This EPROM can be from a 27C256 (32K X 8) to a 27C010 (128K X 8)and must have at least a better access timing than 120 Nsec. The position of the inserted EPROM and jumper W2 selects the capacity in use. Normally 27C512 are chosen and W2 connect 2 to 3. The RAM are build around one or two 55257 32kbytes static RAMs with an access time better than 100Nsec. These 128 Kbytes of RAM are battery backup saved during power down. The typical consumption on the lithium battery is about 2 micro A which allows a life time of more than 6 years typically. The RAM memory decoder uses a special IC (U32) BCT2414 which feeds trough the RAM’S chip select decode from 5V or battery backup supply accordingly to the reset’s state. Selection between EPROM and RAM are made with A17 on 128K boundaries. CANTOR 48 channels uses 64 kb of static RAM directly soldered on PCB 1264. CANTOR 96 channels needs 64 kb of suplementary static RAM. This upgrade of static RAM is provided by PCB 1395 trough connector P13.

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4. I/O CPU DEVICES Data bus connection between I/O devices and CPU can use two kinds of interconnection mechanism: • I/O which must be read by the CPU and are directly connected to the CPU bus named D0 to D8 (e.g. SCC). • buffered I/O devices (named DB0-8) allowing connection to surface data bus and slow CPU I/O devices. I/O devices are selected on IORQ transition to 0 and if address bit A7=0. U23 (74HC244) separates CPU data bus from the remainder of the I/O CPU board devices. Unfortunately devices like latches need data hold time after writing rising edges. Therefore is provided the BUS HOLDER make around U22 (74HC244) & R81. With help of this device, during non access time, the bus floats but “maintains” the previous state of the data.

A. Watchdog If W3 jumper is inserted a transition must occur at this input before every 100 msec watchdog timeout, avoiding a general RESET state (see RESET). Normally the watchdog feature is enabled and jumper W3 inserted.

B. Serial communication controller(SCC) The CANTOR uses a 8530 (U20) for serial communications which performs the DMX DIMMER INPUT and OUTPUT link and the MIDI communication. DMX dimmer input/output uses SCC channel 1 and DMA channel 1, so jumper W1 must be inserted trough 5-6. MIDI input meets the MIDI requirements and the MIDI speed of 31.25 Kbaud and uses SCC channel 2. Interrupts are generated on break reception transmission and channel 2 management. New generation of PCB 1264 use (U4 NMØ51Ø5) a DC/DC converter to isolate DMX input/output from de 5 V main power supply. One LED DMX on surface board KEY is lighting when data are sent to output DMX line. This function is made by U16 monostable which detects transitions on the DIMMER output line.

C. Memory card interface Memory card interface can share up to 1MBytes space memory card. All memories accesses are software made which would permit use of different memory card variety like PROM, EEPROM etc.. It offers also the possibility to work in pseudo static environment avoiding timing problems (flat cables). Four latches (U25,U26,U27,U33) connected to extended data bus maintain data during read write operations. However during read operations U25 must be disabled and buffer U24 directly connected to data bus to perform the read operation to the CPU. When card is inserted into its connector it shorts the CDET input which can be tested by polling. Before every read write operation, the RAM card battery backup voltage is fed to the ADC logic conversion trough AR1. R55 limits current flow (if existing) on power down state. The 5V supply of the memory card is given by Q3 and Q4 from 15V supply on CPU request.

D. 7 segment display The latch U34 maintains 7 segments code reflecting current software loop in use ( for more details see test operating chapter in appendix1).

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E. External lines CANTOR uses 8 external input lines which can be polled by software. All these manual inputs must be handled with care because they aren’t isolated from 5V main supply voltage. However R25 to R30 protect inputs against dangerous voltage. State of external lines are transferred to CPU trough the buffer U14 directly connected to CPU data bus. A modification state can be obtained pulling these inputs near GND (e.g. connecting them to pin 9 of J5).

F. Multiplexed I/O devices CANTOR uses many I/O which share a general purpose multiplexed bus. All the multiplexed I/ O devices are build around: • latches U5,U6,U8,U10,U21 used for writing operations • buffers U44,U45,U46,U47 used for reading operations

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KEYBOARD MATRIX ENCODER DECODER Key matrix encoder decoder is generated on CPU board avoiding the need of a key matrix encoder decoder on each surface PCB. Connections to the five surface PCBs are made trough flat cables. Key matrix is organized around 7 write lines and 24 read columns. Writing a correct pattern on latch U6 supplies the selected line of the 7 matrix key encoders. Invertor U19 & U28 buffer the state of U6. Column reading is performed by U44 & U45 & U46; a pushed key will give a reading 0 and debounce is software made. Diodes are inserted between each flash button and the common line avoiding ghost key reading on the PCB 1265. New generation of PCB 1264 use (U4 NMØ51Ø5) a DC/DC converter to isolate DMX input/output from de 5 V main power supply.

LEDs MATRIX All the LEDs of the surface board are encoded as a matrix of 5 lines and 23 columns. But selection of the lighting LED is decoded and generated on the CPU board. The software must select which line is activated writing to U5 latch. One of the darlington PNP transistors (Q7 to Q11) supplies the respective LED line. Writing correct information on latches U6,U8,U10 selects in the line which LED must be activated. Latches are buffered by open collector drivers ULN 2803 sinking about 30 mA per LED. To avoid supply shift due to LED lighting on the PCB, an internal PCB 5V line feeds the power darlington transistors.

LCD DISPLAYS Messages and selection requests are sent to user trough two LCD displays. Obviously these LCD displays are mounted on surface board. Choice was made around dots matrix LCD unit with Super Twisted High Contrast technology allowing a very large viewing angle range. LED backlighting uses array of LED arranged on the viewing area allowing a high luminance combined with a very long life time. LCD selection and activation are generated on the PCB 1264 (CPU) but LCD displays are used on : • PCB 1266 submaster which uses a 40 characters LCD display. Latch U6 hold LCD data bus state named KB0 to KB7 while selection is made by latch U5 trough EDL1 signal. Register selection and read/write operations are controlled by outputs P0 & P1 of latch U10.Contrast can be fine adjusted by R82. • PCB 1267 crossfade which uses a 16 characters LCD display. Latch U6 holds LCD data bus state named KB0 to KB7 while selection is made by latch U5 trough EDL2 signal. Register selection and read/write operations are controlled by outputs P0 & P1 of latch U10. Contrast can be fine adjusted by R83. To avoid supply shift an optional 5V line can feed, if necessary, trough P10 & P11 the array of LED backlighting which have the disadvantage to have a high consumption on 5V supply.

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DIGITAL TO ANALOG AND ANALOG TO DIGITAL CONVERSIONS All the conversions are based on a 8 bits digital to analog converter U12 (DAC0800). This DAC can be used alone to generate the output level to the 0-10V analog outputs. The DAC can also be used to perform analog to digital conversions; with help of a comparator which compares the analog input to be converted with an increasing voltage given by the DAC. After every increasing voltage on the DAC a software loop must test if the generated voltage is always lower than input to be converted. As soon as the voltage of the DAC reaches the voltage to be converted comparator AR4-B changes state. This form of conversion is called successive approximations conversion and for a full 8 bits ADC conversion needs 8 successive digital settings (MSB,2SB...LSB) and tests by the CPU. The DAC uses the multiplexed bus held by latch U10. This converter is a current converter and voltage across R76 reflects output voltage. This output voltage can be used to generate analog voltage (DAC conversion), but is also used if one ADC conversion is in progress. In this case feedback to processor is generated with AR4-B comparator and buffer U47. Multiplexer U36 (4051B) selects which voltage must be converted. Selection of this multiplexer is made by latch U17 and open collector invertor U18. NB: U39 4 bits latched to 16 bits decoder is used to hold selection of the analog multiplexers used on surface board (see surface board PCB).

AUDIO INPUT This input is used when special effects must be in accordance with sound. The audio input signal is connected to J6 ; left and right signal (if stereo) are summarized before amplification. Impedance input is about 20Kohm. If balanced inputs are used, connecting pin 5 or 3 to one phase of the input signal and using pin 4 or 1 as active phase would perform the same as using a transformer. The first stage of the audio interface is an automatic gain controller (AGC) which accepts a level from 50mV to 50V. Transistor Q2 adjusts current level injected on amplifier stage AR2-A to get an average output signal level. Following AGC stage, the audio signal at correct level is buffered and fed to the ADC logic conversion trough analog multiplexers U36.

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B. CANTOR SURFACE BOARD 1.GLOBAL OVERVIEW Surface board includes keys matrix, LEDs lighting matrix, and potentiometers supply and demultiplexer. Keys matrix and LEDs matrix management (line and row selection) are generated on CPU board (PCB 1264) and fed to all the surface board trough flat cable. For potentiometer level acquisition they’re 2 solutions in use; it depends of the number of potentiomers held by the board. • if few potentiometers are used, levels are directly sent to CPU board and selected by U36 (4051).This solution is used on: - PCB 1267 crossfade - PCB 1268 key • PCB holding too many potentiometers use on board a private analog multiplexers. Address selection of multiplexers is generated on CPU board by latch U17; U35 (4515B) generate the enable used by multiplexers on surface board. This solution is used on: - PCB 1265 where the 24 potentiometers are selected by multiplexers U2,U4,U5. - PCB 1266 where the 16 potentiometers are selected by multiplexers U1,U2. All the potentiometers are supplied in 5V with a “private line” avoiding reading shift perturbations and noise.

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2.PCB 1265 24 POTENTIOMETERS

PCB 1265 Internal view Including all the functions seen later, this PCB has the additional feature of generating output 0-10V analog voltages. Each output voltage needs a sample and hold which maintains the value to be generated during approximately 20 mSec. Software must after each main loop actualize the new output voltages. Generation of one of these voltages needs 3 steps: •

conversion of the digital value in the analog voltage with help of the DAC on CPU board; AR3 adjusts level from 0-5 Volt to 0-10Volt output level.

•

This voltage is sent to the selected analog output with help of demultiplexers U1,U3,U6.

•

The selected output of demultiplexer then loads a 100 nF capacitor which holds the level of the selected analog output. This voltage is buffered trough op amp TL084 to give up to 3 mA to external world. The voltages generated are also used to produce on green LEDs the dimming state of the corresponding output. R29,R30,R31 can be modified (to 27K) to configure analog output voltage to current without need of the optional PCB1284.

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3.PCB 1266 SUBMASTER This board includes the LED matrix and Key matrix. As the PCB1265 it contains also 16 potentiometers with their own multiplexers U1 and U2. The board holds the LCD 2 lines X 40 characters directly soldered on PCB with P3. Additional connector dubox P2 supplies LCD backlighting.

4.PCB 1267 CROSSFADE This board includes the LED matrix and Key matrix and only 3 potentiometers. Potentiometers reading is referred to CPU (PCB 1264) trough input V1,V2,V3 of U36. The board holds the LCD 2 lines X 16 characters directly soldered on PCB with P3.

5.PCB 1268 KEY This board includes the LED matrix and Key matrix and only 2 potentiometers. Potentiometers reading is referred to CPU (PCB 1264) trough input V4 & V5 of U36 The board holds the RAM protect key directly soldered to PCB.

6.PCB 1284 SOCAPEX ANALOG OUTPUTS Analog output voltages generated on PCB 1265 are either directly sent to external world trough flat cable and a connector DB25 either to an optional selection PCB1284. The position of the incoming flat cable from PCB 1265 to this PCB can be used to select one of the 3 “analog output protocol”: •

P3 :voltage 0-10V outputs (max 3mA)

•

P4 :current outputs 0-300microA

•

P1 :insertion of diode if voltage is selected which gives the ability to select multiple outputs the highest

The analog outputs are then fed to a SOCAPEX 37 contacts connector. Pin 1 to 24 hold respectively outputs 1 to 24; pin 25 to 37 are connected to ground.

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CANTOR APPENDIX 1 A. TEST CANTOR CPU CARD PCB 1264 Ve 1 1. First start-up •

Verify modifications on PCB according to part list 1139.67.001E.

•

Verify the Fuses F1 500 mA slow, and if necessary the fuse of power supply SNP3034.

•

•

Disconnect the AMP connector on the CPU board and chek the voltage : between pin 1 & 2 : + 5.05 V 1 & 8 : + 15 V 1 & 6 : - 15 V Verify V max between TP3 and TP4, it has to be approximatively 5 V

•

The intensity of the display can be adjusted by means of R133 and R134

•

Jumper W1 :

• • •

Jumper W2 : Jumper W3 : Jumper W4 :

• • •

Jumper W5 : Jumper W6 : Jumper W7 :

•

Reset adjustment :

• •

Contrast of LCD : R82 Vcont1 (R83 Vcont2) sets contrast level of LCD 40 CHR (16 CHR). Level of analog outputs : Adjust R85 to get 10 volt on analog outputs.

5 and 6 closed; DMA REQU1. 1 and 2 closed for MIDI. 2 and 3 closed; A15 selected for 27C010. off; watchdog not used. if not used: normal running 1-2 connected: test program on power up 1-2 and 3-4 connected test knobs on power up. closed; Vb to RAM. closed; CPU battery used. not used ; no power fail. - Decrease power supply VCC to 4.8V instead of 5V; - Z180 must fall in RESET state - decrease R105 to exit RESET state; DS6 light ON... - Readjust VCC of power supply to 5.05V.

2. Start Test Program •

Jumper W4: 1- 2 3-4 off - off : normal program on - off : test program on - on : test keys and leds on power up.

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3. Initialization of program (normal or test) The 7 Segments Display shows the following numbers 0 1 2 3 4

On first instructions After init of Z180 (MMU pages, counters...) After control of Cold Start data After initialization of DMA and SCC After start of DMA

NB: The decimal point flashes during program execution. During Test program the 7 Segments Display shows following numbers: A B C D E F G H I T P M N O P Q

SELECTION MENU TEST KEYS AND LEDS TEST POTENTIOMETERS AND AUDIO INPUT DISPLAY ROM AND RAM DISPLAY MEMORY CARD TEST RAM TEST ROM TEST EXTERNAL LINES VOLTAGE LEVEL OF CPU AND MEMORY CARD BATTERIES AUTOMATIC TEST TEST SERIAL INTERFACES READ CARD AT ADDRESS SELECTED BY POTENTIOMETERS WRITE CARD AT ADDRESS SELECTED BY POTENTIOMETERS GLOBAL TEST OF MEMORY CARD WRITE RAM ADDRESS SELECTED BY POTENTIOMETERS OUTPUT A LINEAR RAMP TO 48 ANALOG OUTPUTS

It’s not possible to exit from Test mode so you must: - Switch off - remove jumper W4 - Switch on NB: A cold start is performed when key “IN” and “CAN” are pushed on power up.

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4. Tests CPU card The test program is selected with key “UP” and “DOWN”. Push E key to start the selected test program. Pushing the clear (CL) key will exit the selected test and return to main menu. a. Test keys and LEDs • •

The LCD 40 CHR shows which key is pushed (3 letters XXX), his corresponding system code (YY) and, if they are, how many knobs are simultaneously pushed. The test program gives also the number of keys yet to be tested and the icon of some of them. Every pushed key will lit the corresponding led(s). KNOB RES

: XXX CODE : YY NKN : Z : code of 8 keys yet to be tested by the user

STILL : NBR

b.Test potentiometers • •

All the potentiometers are divided in 3 pages continuously refreshed with the value of the current potentiometer (0 to FE or FF). Change page with “UP” and “DOWN” key. Page 1 : - Gen Master - flash - speed effect - master effect - registers 1 to 12 - scene - prepa - speed transfer - master A and B - battery card - not used - audio input inverted level. Page 2 :

- Submaster 1 to 24.

Page 3 :

- Submaster 25 to 48.

c. Display ROM and Ram • •

•

The state of 16 memory bytes can be displayed on LCD1. The address can be selected with help of REG1 to REG4. Memory mapping is organized: - 00000 to 0FFFFH :EPROM first 64K - 10000H to 1FFFFH :EPROM 64K to 128K - 20000H to 27FFFH :RAM 64K U35 - 30000H to 37FFFH :RAM 64K U48 normally not used. The content of a Block is scanned continuously and can be used to detect an error Note: Option P can be used to write continuously to a selected RAM address with help of REG1 to REG4.

d. View and test memory Card • • •

First the capacity of the memory card is computed and displayed on LCD2 or “CARD NOT PRESENT” if no card is connected. The 16 addresses can be displayed on LCD1 with help of pots REG1 to REG4 . The content of a block is scanned continuously and can be used to detect an error.

• •

The Battery Voltage level can be displayed with test battery. A full test of the memory card can be automatically performed with use of option O

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e. Test RAM • • • • •

•

Control if RAM(s) have better access time than 100 ns and are Low Power versions (HITACHI,TOSHIBA,FUJITSU). RAM is tested from 022000 to 027FFF. On error the program restarts and shows the number of errors and the last fail location address. Number of cycles is shown. Algorithm used for this test is: - fill ram with 00, 01, .. 151, 00, 01... - Control of content. After a RAM Test you must perform a Cold Start (RAM content is altered and no memory data will be saved) (Push ‘IN’ and ‘CAN’ on power up) Note: Option P can be used to write continuously to a selected RAM address with help of REG1 to REG4.

f. Test EPROM • • • •

Check if EPROMs 27C010 have a better access times than 120 ns. A checksum is computed from 00000 - 1FFFF. The checksum is computed again, compared and displayed The number of cycles and errors are displayed on LCD1.

g. Test external lines •

The 8 external input lines are controlled by the software: - 0 open - 1 if closed between pin X and pin9 (GND) CAUTION : the 8 external lines must be enabled

h. Test batteries •

LCD1 displays the voltage of : - the CPU battery which must be higher than 2.5V (typical 3.1V) - the external memory card battery which must be higher than 2V for correct datas retention.

i. Test Serial Interfaces For this test all the outputs are to be connected back to the corresponding inputs: DMX 512 : J7 : connect 1 to 4, 2 to 5 MIDI : connect MIDI IN to MIDI out (4 to 4, 5 to 5) RS232 : J1 : Connect 2 to 3 and 4 to 5 • Lcd1 displays the number of loops and the errors occurred for - S (RS232) : LOOPS ERRORS - D (DMX512): LOOPS ERRORS - M (MIDI) : LOOPS ERRORS • • • • • •

All the serial interfaces are tested with 9600 Baud, 8 bits, no parity and 2 stop bits. AA Hex are sent continuously Software verify if AA hex are received on the 3 interfaces. If an error or a time-out is found: displayed ERROR counter is incremented. The tests are performed repetitively. On RS232 link the line RTS and CTS are also used. This is a cyclic test and it’s easy to synchronize a scope.

j. Automatic test •

Cyclic test of EPROM, RAM and serial interfaces

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k. Backup Memory •

Switch off the PCB and check the consumption of the RAM under battery backup. Replace jumper W5 with an ammeter and test if current given by the battery is less than 4 micro Amp.

l. Consumption Test • •

Control current given on each power line (5V, 15, -15V). Perform this test with different configurations for maximum power consumption.

m. Test analog outputs •

To test analog outputs a triangle wave is written continuously to the 48 analog outputs (dimmed Leds reflects output voltage). This option can be used to test functionality of the PCB 1284.

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B.TEST POTENTIOMETERS AND KEYS CARDS (PCB 1265 to 1268) Start Test program and initialization : see PCB 12640 The test program is selected with key “UP” and “DOWN”. Push F key to start the selected test program. Pushing the clear (CL) key will exit the selected test and return to main menu. a. Test keys and LEDs • •

•

The LCD 40 CHR shows which key is pushed (3 letters XXX), his corresponding system code (YY) and, if they are, how many knobs are simultaneously pushed. The test program gives also the number of keys yet to be tested and some of them. Every pushed key will lit the corresponding led(s). KNOB : XXX CODE : YY NKN : Z STILL : NBR RES : code of 8 keys yet to be tested by the user When moving the individual faders, the corresponding red LED’s indicate the level of this fader from 0 to 100%

b. Test potentiometers • •

All the potentiometers are divided in 3 pages continuously refreshed with the value of the current potentiometer (0 to FE or FF). Change page with “UP” and “DOWN” key. Page 1 : - S, P, SP (crossfader) - MA, MB - Battery card - Audio input but in the inverted state (FF to 0) - P1 to P12 Page 2 : - P29 to P36 - P13 to P24 - P37 to P40 Page 3 : - P41 to P48 - GM - Flash - Effect - Register 1 to 12 - Speed effect.

c. Special care •

PCB1265

•

PCB1266

-PCB1267

: Verify with a scope some analog outputs; level must vary continuously from 0 to 10 V. Check if there is no high frequency oscillations (case of a TL084 which gives too much current) : In case of problems with LCD 40 CHRs check if there’s no shorts circuits on P1 Check 5V supply of LCD ; it must be higher than 4.8V : Check 5V supply of LCD ; it must be higher than 4.8V

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CANTOR APPENDIX 3 : Drawing The following drawings are permanent subject to modification. An Update electronic component list is available upon request.

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MT-1070-07h

Belgium N.V. ADB-TTV Technologies S.A. (Group Headquarters) Leuvensesteenweg 585, B-1930 Zaventem Tel : 32.2.709.32.11 Fax : 32.2.709.32.80 E-Mail : [email protected] Deutschland ADB GmbH Dieselstraße 4, D-63165 Mühlheim am Main Tel : 49.6108.91.250 Fax : 49.6108.91.25.25 E-Mail : [email protected] France ADB S.A.S. Sales office: 168/170, boulevard Camélinat F-92240 Malakoff Tel : 33.1.41.17.48.50 Fax : 33.1.42.53.54.76 E-Mail : [email protected] Factory & group logistics centre: Zone industrielle Rouvroy F-02100 Saint-Quentin Tel : 33.3.23.06.35.70 Fax : 33.3.23.67.66.56 E-Mail : [email protected]

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