Sanyo PLC-XW55A Service Manual page 27

Electrical Adjustments
m Common Center adjustment
1. Receive the 1 line black/white pattern computer signal
computer1 [rGB]
with
. Enter the service mode.
3. Project only green light component to the screen.
100
4. Select group no. " ", item no. "
value to obtain the minimum flicker on the screen.
5. Project only red light component to the screen.
128
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.
129
8. Select item no. " and change data value to obtain
the minimum flicker on the screen.
, 50% White adjustment [PC]
1. Receive the 16-step grey scale computer signal with
computer1 [rGB]
mode.
. Enter the service mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
100
4. Select group no. " ", item no. "
value to adjust amplitude "
white level
. White Balance adjustment [PC]
1. Receive the 16-step gray scale computer signal with
computer1 [rGB]
mode.
. Enter the service mode, select group no. "
7 8
no. " " (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.
mode.
127
" and change data
tPG1
" (+) and
6
" and change data
a 1.6 ±0.1V
" to be .
(a)
white level
100
" item
⁄0 50% White adjustment [Video]
1. Receive the 16-step grey scale composite video sig-
Video
nal with mode.
. Enter the service mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
100
4. Select group no. "
value to adjust amplitude "
white level
⁄1 White Balance adjustment [Video]
1. Receive the 16-step grey scale composite video sig-
Video
nal with mode.
. Enter the service mode, select group no. "
7 8
no. " " (Red) or "
respectively to make a proper white balance.
Confirm that the same white balance is obtained in video
and computer input.
Note On White Uniformity Adjustment
If you find the color shading on the screen, please ad-
just the white uniformity by using the proper computer
and "Color Shading Correction" software supplied sep-
arately.
The software can be ordered as follows;
coLor SHAdING correctIoN Ver. 4.00
Service Parts No.
-7-
tPG1
6
", item no. " " and change data
a 2.2 ±0.1V
" to be
(a)
white level
100
" (Blue), and change Data values
645 075 9611
" (+) and
.
" item