Sanyo PLC-XU58 Service Manual page 25

Electrical Adjustments
.
Common Center adjustment
t1. Receive the 1 line black/white pattern computer sig-
nal with Computer2 [RGB] mode.
2. Enter the service mode.
3. Project only green light component to the screen.
10
4. Select group no. " ", item no. "
value to obtain the minimum flicker on the screen.
5. Project only red light component to the screen.
10
6. Select item no. " " and change data value to obtain
the minimum flicker on the screen.
7. Project only blue light component to the screen.
11
8. Select item no. " and change data value to obtain
the minimum flicker on the screen.
⁄0
Gamma adjustment
[PC-GAMMA ADJUSTMENT]
1. Receive the 16-step grey scale computer signal with
Computer2 [RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
9
4. Select group no. " ", item no. "
value to adjust amplitude "a" to be
[AV-GAMMA ADJUSTMENT]
1. Receive the 16-step grey scale video signal with
Video [Video] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
9
4. Select group no. " ", item no. "
value to adjust amplitude "a" to be
white level
9
" and change data
TPG1
" (+)
10
" and change data
2.2
±0.1V.
TPG1
" (+)
10
" and change data
2.4
±0.1V.
(a)
white level
-25-
⁄1
White Balance adjustment
[PC WHITE BALANCE ADJUSTMENT]
1. Receive the 16-step gray scale computer signal with
Computer2 [RGB] mode.
2. Enter the service mode, select group no. "
11 12
" " (Red) or " " (Blue), and change Data values
respectively to make a proper white balance.
[AV WHITE BALANCE ADJUSTMENT]
1. Receive the 16-step gray scale composite video sig-
nal with Video [Video] mode.
2. Enter the service mode, select group no. "
11 12
" " (Red) or " " (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.
If you find the color shading on the screen, please
adjust the white uniformity by using the proper com-
puter and "Color Shading Correction" software sup-
plied separately.
The software can be ordered as follows;
COLOR SHADING CORRECTION ver. 3.03
Service Parts No.
9
" item no.
9
" item no.
645 066 7428