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3. Tint/Color adjustment
Video signal
1) Ground CP313 via 33k ohm resistor.
2) Unsolder (open circuit) IF pad HP200.
3) Apply 75% color bar signal to video input of the set.
4) Observe CP337 signal. Adjust VR300 (TINT) and VR301 (COLOR)
so that the difference between the four pulses is within 0.2V.
4. VCC4-1 adjustment
Power supply
1) Adjust power supply output so that CP172 voltage becomes 11.5 ± 0.05V.
2) Connect a digital multimeter to CP166 and adjust VR161 so that the meter reading is 4.50 ± 0.02V.
5. VCC9 adjustment
Power supply
1) Adjust power supply voltage so that CP172 voltage becomes 11.5 ± 0.05V.
2) Connect a digital multimeter to CP163 and adjust VR161 so that the meter reading is 8.3 ± 0.3V.
Set
CP313
Video
Output
Input
CP337
Set + monitor
Input
Output
DC12V
CP166
Set + monitor
Input
Output
DC12V
CP163
— 3 —
GND
Oscilloscope
33kw
Pulses 2 and 3 are adjusted by TINT
While pulses 1 and 4 are controlled byCOLOR.
1
2
3
Digital multimeter
Digital multimeter
4
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