Sanyo PLC-XU40, Service Manual

Page: 29 / 115

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Electrical Adjustments
1. Receive the 16-step gray scale computer signal with
Computer [Analog RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TP503G
” (+)
and chassis ground (-).
4. Select item no. “
10
” and adjust the amplitude “a” to
be
2.4
±0.1V by changing the Data value.
(a)
white level
white level
⁄0
Signal Offset adjustment [PC]
[PC WHITE BALANCE ADJUSTMENT]
1. Receive the 16-step gray scale computer signal with
Computer [Analog RGB] mode.
2. Enter the service mode, select item no. “
11
” (Red) or
“
12
” (Blue), and change Data values respectively to
make a proper white balance.
[AV WHITE BALANCE ADJUSTMENT]
3. Receive the 16-step gray scale composite video sig-
nal with Video [Video] mode.
4. Enter the service mode, select item no. “
11
” (Red) or
“
12
” (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
If you find the color shading on the screen, please
adjust the white uniformity by using the proper comput-
er and “Color Shading Correction” software supplied
separately. The software can be ordered as follows;
COLOR SHADING CORRECTION ver.. 3.0
Service Parts No. 645 056 6288
NOTE ON WHITE UNIFORMITY
ADJUSTMENT
1. Receive the 16-step gray scale composite video sig-
nal with Video [Video] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TP503G
” (+)
and chassis ground (-).
4. Select item no. “
10
” and adjust the amplitude “a” to
be
2.4
±0.1V by changing the Data value.
(a)
white level
white level
⁄1
Signal Offset adjustment [AV]