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4-6. TINT adjustment
1. Adjustment procedure
• Make sure
VCC5 (CP344) = 5.0 ± 0.05 [V]
VCC15 (CP391) = 15.0 ± 0.45 [V]
VCC7 (CP390) = 8.0 ± 0.05 [V]
VCC3 (CP220) = 3.3 ± 0.08 [V]
• 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 ➜ SHIFT ➜ MENU keys in order rapidly. (TEST MODE 1)
(3) Select and execute COLOR BAR.
(4) Trigger with FRP (CP305) signal.
(5) Adjust VR301 so that potential difference between the 2nd and 4th pulses' height (pedestal-peak) (A
and B) of VB waveform (CP324) is less than 0.1Vp-p.
4. Note
Perform the adjustment after (continuously from) Color adjustment.
D-PCB
VCC15
(CP391)
VCC5
(CP344)
VCC7
(CP390)
VCC3
(CP220)
QV-3500EX
VB(CP324)
1432
BA
Digital oscilloscope
Power
Supply
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