Sanyo PLC-XU70, Service Manual

Page: 25 / 96

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Electrical Adjustments
1. Receive the 16-step grey scale composite video sig-
nal with
Video [Video]
mode.
2. Enter the service mode, select group no. “
9
” item
no. “
7
” (Red) or “
8
” (Blue), and change Data values
respectively to make a proper white balance.
Confirm that the same white balance is obtained in
video and computer input.
⁄2
White Balance adjustment [Video]
1. Receive the 16-step grey scale composite video sig-
nal with Video [Video] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TPG1
” (+)
and chassis ground (-).
4. Select group no. “
9
”, item no. “
6
” and change data
value to adjust amplitude “a” to be
2.2
±0.1V.
(a)
white level
white level
⁄1
50% White adjustment [Video]
If you find the color shading on the screen, please
adjust the white uniformity by using the proper
computer and “Color Shading Correction” software
supplied separately.
The software can be ordered as follows;
NOTE ON WHITE UNIFORMITY
ADJUSTMENT
COLOR SHADING CORRECTION Ver. 4.00
Service Parts No. 645 075 9611