Sanyo PLC-XU87 Service Manual page 30

Electrical Adjustments
.50% White adjustment [Video]
1. Enter the service mode.
2. Receive the 16-step grey scale composite video sig-
Video[Video]
nal with
3. Connect an oscilloscope to test point "
and chassis ground (-).
100
4. Select group no. " ", item no. "
value to adjust amplitude "
white level
⁄0 White Balance adjustment [Video]
1. Enter the service mode.
2. Receive the 16-step grey scale composite video sig-
Video[Video]
nal with
100
3. Select group no. " " item no. "
and change Data values respectively to make a prop-
er 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. 645 075 9611
mode.
tP35G
" (+)
6
" and change data
a 1.6 ±0.1V
" to be .
(a)
white level
mode.
7 8
" (Red) or " " (Blue),
⁄1 Keystone Offset adjustment
After replacing the G-sensor circuit (IC3851, IC1802
and peripheral circuit), readjust the Keystone Offset
adjustment as follows.
1. Put the projector on a horizontal place with the
adjustable feet being minimum range and then enter
the service mode.
102
2. Select group no. "
0 5
value from " " to "
SeLect
3. By pressing the
Offset adjustment will start.
4. When it has completed, the "OK" message will
appear on the screen.
5. By pressing any button on the projector or the
remote control, the "OK" message will disappear.
(Data value of Group no. "102", item no. "3" will be
back from "5" to "0" for initial value.)
-30-
3
", item no. " " and set data
".
button, the Keystone