Table Of Contents - Casio QV-780 Service Manual & Parts List

SPECIFICATIONS ...................................................................................................................................... 1
WIRING AND BLOCK DIAGRAM ..............................................................................................................2
POWER SUPPLY CIRCUIT OPERATION .................................................................................................. 3
ADJUSTMENT ........................................................................................................................................... 4
1. Unit Adjustment .................................................................................................................................... 4
1-1. Color parameters loading ............................................................................................................4
1-2. Scratch compensation .................................................................................................................5
1-3. Flash adjustment ..........................................................................................................................5
1-4. Flash check ...................................................................................................................................6
1-5. Current consumption ...................................................................................................................7
1-6. Clock reset .................................................................................................................................... 7
1-7. Other test modes ..........................................................................................................................8
2. PCB K772-DA Adjustment .................................................................................................................... 8
2-1. VCC1, VCC3 voltage check ..........................................................................................................9
2-2. VCC7, VEE3 adjustment ...............................................................................................................9
2-3. Clock oscillation check ................................................................................................................ 9
3. PCB K772-L Adjustment .....................................................................................................................10
3-1. VCC1 adjustment and VCC2, VCC6, VEE2, VCC0 voltage check ........................................... 11
3-2. VCO free run frequency adjustment ......................................................................................... 11
3-3. Backlight drive voltage adjustment ..........................................................................................12
3-4. VCOM AC adjustment and VCOM DC coarse adjustment ......................................................12
3-5. Brightness voltage setting and contrast adjustment .............................................................. 13
3-6. BCC ..............................................................................................................................................14
3-7. Color adjustment ........................................................................................................................15
3-8. VCOM DC adjustment .................................................................................................................15
DISASSEMBLY ........................................................................................................................................16
PRINTED CIRCUIT BOARDS .................................................................................................................. 22
TROUBLESHOOTING ............................................................................................................................. 26
EXPLODED VIEW .................................................................................................................................... 28
PARTS LIST ............................................................................................................................................. 30
SCHEMETIC DIAGRAMS ........................................................................................................................36
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