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PAL COLOR DIFFERENCE DEMODULATION RATIO ADJUSTMENT
Measuring Instruments Signal generator (PAL 75% color bar signal)
Oscilloscope
Test Points CN001 pin 3 (R-Y Output)
Adjustment Points VR304 (Pr GAIN VR)
[Preparation] Supply power to the following connector (CN001) pins using a DC power supply, extension cable, etc.
Note: Perform the following adjustments after completing the PAL Color
Depth adjustment.
1. Apply the PAL color bar signal to Terminal VIDEO1.
2. Connect the oscilloscope across CN001 pin 3 and GND.
3. Adjust VR304 so that the voltage at <A> in the figure on the right is
0.525 V ± 0.015 V.
CN001 pins 45, 46 14 V DC ± 1 V
CN001 pins 47, 48 7 V DC ± 1 V
CN001 pins 25 - 29, 31, 32, GND
35, 36, 49, 50
<A>
0.525V
±0.015V
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