Contrast Adjustment - Canon LV-X2U/D78-5352 Service Manual

2.4 Contrast Adjustment

Measuring equipment ............Oscilloscope
Input signal ...........................16-step gray scale
Enter the service mode.
Adjust part A of the signal waveform at each test point to the minimum with the
VOLUME +/- button.
1. Enter computer input mode and input a 16-step gray scale signal.
Item No. Test point
4
5 TP-G1
6
2 Enter AV input mode and input a 16-step gray scale signal.
Item No. Test point
4
5 TP-G1
6
3. Enter component input mode and input a 16-step gray scale signal (480i signal).
Item No. Test point
4
5 TP-G1
6
Adjustment
TP-R1 Computer red contrast
Computer green contrast
TP-B1 Computer blue contrast
Adjustment
TP-R1 AV red contrast
AV green contrast
TP-B1 AV blue contrast
Adjustment
TP-R1 Component red contrast
Component green contrast
TP-B1 Component blue contrast
A
Fig. 3-4
3-11
Part 3: Adjustment