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5-2. G BOARD ADJUSTMENT
8. PAL CHROMA (NORMAL)
;
1. Checking the output lines
1)
Input aPAL color bar.
Check that the output lines meet the standards below.
2) Connect the oscilloscope probe to 1C404 Pin 30 or TP402.
15V
16.0 + 1.0V
3) Put the unit into service mode.
11S +0.1V
waveform line up. (Fig. 17)
5V
5.0 + 0.5V
Adjust so that the B and D peaks are the
same.
40 mV max.
Fig. 17
9. PAL R-Y LEVEL
1) Input a PAL color bar.
2) Connect the oscilloscope probe to 1C404 Pin 41 or TP401.
3) Put the unit into service mode.
4)
Adjust}R-Y LEVEL PAL|so that the tops of the waveform
line up as in the diagram below. (Fig. 18)
1C404 41 pin
Adjust so that B=D above
60mV max.
20mV
max.
Fig. 18
9. Writing the adjustment result
1. Write the adjustment results into memory.
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