Color Adjustment - Casio QV-3500EX Service Manual & Parts Catalogue

4-5. Color adjustment

1. Adjustment procedure
• Make sure
(CP344) = 5.0 ± 0.05 [V]
VCC5
(CP391) = 15.0 ± 0.45 [V]
VCC15
(CP390) = 8.0 ± 0.05 [V]
VCC7
(CP220) = 3.3 ± 0.08 [V]
VCC3
• Perform this adjustment after Contrast adjustment.
2. Preparation
• AC adaptor or voltage regulator
• Frequency counter
3. Adjustment and checking
(1) Turn the power on while pressing SHIFT and MENU keys simultaneously. (TEST MODE)
(2) Push SHIFT
(3) Select and execute COLOR BAR.
(4) Trigger with FRP (CP305) signal.
(5) Adjust VR300 so that pulse width of 4th VB waveform (CP324) (pedestal-peak) is 2.90 ± 0.05Vp-p.
(6) Proceed to TINT adjustment.
4. Note
Perform the adjustment after (continuously from) Color adjustment.
Power
Supply
SHIFT MENU keys in order rapidly. (TEST MODE 1)
QV-3500EX
D-PCB
VCC15
(CP391)
VCC5
(CP344)
VCC7
(CP390)
VCC3
(CP220)
VB(CP324)
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Digital oscilloscope
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