Casio QV-780 Service Manual & Parts List page 8

(1) Set the QV-780 in "REC" mode.
(2) Execute the test program.
• Set the dial on " " (PANORAMA MODE).
• While holding down the "SHUTTER" and "DELETE" buttons, turn the POWER on.
• While TEST MODE is indicated on the LCD, select the dial on
Press "MENU" and "
LCD indicates;
CLOCK RESET
STROBE ADJUST
DEFECT CORRECT
BATTERY CHECK
(4) Use "+" or "–" buttons to select "STROBE ADJUST" and press the SHUTTER button.
(3) Shot a picture of the test paper.
(Flash indicator should be red before shooting.)
(5) Make sure that the flash icon turns from red to blue.
(If it does not turn into blue, IC531 might be faulty.)
(6) Turn the POWER switch off.
As the adjustment data is written in the EEPROM by the POWER switch operation, do not forget
to turn it off using the switch.
1-4.Flash check
This test is to make sure that the flash circuit is not affected by undesirable electric noise. Perform
this test whenever you changed wirings of the camera unit.
Conditions;
• Perform after the flash adjustment
• Use " " button to select Flash On.
• Apply 6.0 ± 0.1 [V] voltage on DC IN jack.
(1) Set the QV-780 in "REC" mode and press the shutter.
(2) Using a digital oscilloscope, monitor flash trigger pulse.
Put oscilloscope probe
on Camera unit.
" buttons simultaneously.
Voltage
A
Regulator
DC6.0±0.1V
Ammeter
Digital oscilloscope
TIME: 1.0¨ µsec/div
VOLTS: 1V/div (AC)
— 6 —
.
Correct waveform
OK if this peak is shown
TIME: 1µsec/div
VOLTS: 1V/difv
NG waveform
2nd positive peak is not
shown.
TIME: 1µsec/div
VOLTS: 1V/difv