Sanyo PLC-XU86 Service Manual page 25

Electrical Adjustments
⁄1
50% White 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 "
and chassis ground (-).
9
4. Select group no. " ", item no. "
value to adjust amplitude "a" to be
white level
⁄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, 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.
NOTE ON WHITE UNIFORMITY
ADJUSTMENT
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;
COLOR SHADING CORRECTION Ver. 4.00
Service Parts No. 645 075 9611
TPG1
" (+)
6
" and change data
2.2
±0.1V.
(a)
white level
9
" item
-25-
⁄3
Keystone Offset adjustment
After replacing the G-sensor circuit (IC3851, IC1801
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. " ", item 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.)
3
" and set data
button, the Keystone