Casio QV-770 Specifications download pdf (Page 17)

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Adjustment of VCC7, VCC3, voltage check of VCC1

• Supply voltage

CP150 = 5.0 ± 0.05 [V]

CP130 = 3.3 ± 0.05 [V]

CP100 = 5.0 ± 0.05 [V]

(You can use an AC adaptor however, for the checking after repairs, apply above mentioned voltages.)

(1) Adjust VR131 for VCC7(CP121) to be 15.0 ± 0.3 V

(2) Adjust VR130 for VEE3(CP120) to be –5.5 ± 0.1 V

(3) Make sure that VCC1(CP102) is 3.2 ± 0.16 V

Operation Check

• Supply voltage

CP150 = 5.0 ± 0.05 [V]

CP130 = 3.3 ± 0.05 [V]

CP100 = 5.0 ± 0.05 [V]

(You can use an AC adaptor however, for the checking after repairs, apply above mentioned voltages.)

1. Set QV-770 to “PLAY” mode. (Computer communication does not work in “REC” mode.)

2. Connect QV-770 and PC with link cable.

3. Operate adjustment software on MS-DOS.

T773E. EXE

4. Make sure PC’s monitor indicates that loading parameter is complete.

(1) Make sure that serial communication is OK.

(2) Make sure DRAM is OK.

(3) Make sure flash memory is OK.

(4) Make sure OSD is OK.

(5) Make sure Battery Voltage warning level is OK. (value 164 to 243)

(6) Make sure color bar is outputted.

(7) Make sure backlight controller is OK.

(8) Make sure LED controller is OK.

(9) Check key input.

(10) Make sure VIDEO SW controller is OK.

(11) Make sure each button is OK.

(12) Make sure IrDA is OK.

(13) Make sure to turn power OFF.

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Casio QV-770 Specifications Page 17