Adjustment; Adjustments To Be Done; Adjustments - Casio VM-6000 Service Manual

2. ADJUSTMENTS

2-1. Adjustments to be done

Adjustments
1. VDD adjustment,
VGH, VSH, VGL, Vcc9 voltage check
2. Bright adjustment
3. Contrast adjustment
4. TINT color adjustment
5. LCM screen positioning
2-2. Adjustments
1. VDD adjustment, VGH, VSH, VGL, Vcc9 voltage check
VCC1-1
Stabilizer
• Conditions
Apply 11.50 ± 0.05 [V] on Vcc1-1.

• Adjustment

Adjust VR161 so that VDD (CP165) voltage becomes 5.00 ± 0.02 [V].
• Checking
VGH (CP168) = 19.0 ~ 21.0 [V]
VSH (CP166) = 13.5 ~ 14.5 [V]
VGL (CP164) = –5.5 ~ –4.0 [V]
Vcc9 (CP163) =
2. Bright adjustment
IF signal
Signal
generator
VCC1-1
Stabilizer
Power supply, Digital voltmeter
Power supply, Signal generator, Oscilloscope
Power supply, Signal generator, Oscilloscope
Power supply, Signal generator, Oscilloscope
Power supply, Signal generator
VDD
M-PCB
VGH
VSH
VGL
VCC9
7.8 ~ 8.4 [V]
M-PCB
CP301
CP706
Necessary equipment
VDD (+5 V)
22 KΩ
Oscilloscope
— 2 —
Digital
V
Voltmeter