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3-7. B Matrix Adjustment
Test point:
TPS3
Test equipment: Oscilloscope
Adjusting point: RV55
1. Perform the color bar shooting at TP53. Adjust RV55
until the following relation is obtained among Ye
level, G level and B level.
G>Ye>B
3-8. CHR Level Adjustment
Test point:
TPS7
Test equipment: Oscilloscope, vector scope
Adjusting point: RV56 — 61
1. Shoot white part of the color bar at center of the screen
and set the white peak to 0.7V at TP57.
2, Adjust RV56 and RV57 for minimum white carrier.
3. Shoot red part and blue part of the color bar at center
of the screen respectively. Adjust color gain with
RV58 & RVS59, and hue with RV60 & RV61 to obtain
the values given in the table.
,
[eee
6
3-9. Burst Level Adjustment
Test point:
TPS7
Test equipment: Oscilloscope
Adjusting point: RV65
1. Adjust RV65 so that burst level at TP57 shows
0.28 Vp-p.
3-10.
W.B Adjustment
Test point:
TPS7
Test equipment: Oscilloscope
Adjusting point: RV56, RV57
1. Shoot the gray scale to fill whole screen.
2. Adjust RV56 and RV57 alternately until carrier signal
of stair step waveform shows minimum.
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