Common Center Adjustment - Sanyo PLC-XT25 Service Manual

Electrical Adjustment
n Common Center adjustment
1. Receive the 50%-Whole Gray computer signal with
Input1 [rGB] mode.
. Enter the service mode.
100
3. Select group no. " ", item no. "
2
data value to " " to reduce the panel frequency.
4. Project only red light component to the screen.
101
5. Select group no. " ", item no. "
value to obtain the minimum flicker on the screen.
6. Project only green light component to the screen.
1
7. Select item no. " " and change data value to obtain
the minimum flicker on the screen.
8. Project only blue light component to the screen.
2
9. Select item no. " and change data value to obtain
the minimum flicker on the screen.
100
10. Select group no. "
0
data value to " " to reset the panel frequency.
m 50% luminance adjustment [PC]
1. R eceive the 16-step grey scale computer signal with
computer1 [rGB]
mode.
. E nter the service mode.
3. C onnect an oscilloscope to test point "
and chassis ground (-).
100
4. S elect group no. " ", item no. "
value to adjust amplitude "
white level
, 50% luminance adjustment [Video]
1. R eceive the 100%whole-white composite video signal
with Input3 [Video] mode.
. E nter the service mode.
3. C onnect an oscilloscope to test point "
and chassis ground (-).
100
4. S elect group no. " ", item no. "
value to adjust amplitude "
white level
92
" and change
0
" and change data
92
", item no. " " and change
tP35G
6
" and change data
a 1.1 ±0.1V
" to be .
(a)
white level
tP35G
6
" and change data
a 2.2 ±0.1V
" to be .
(a)
white level
. White Balance adjustment [PC]
1. R eceive the 16-step gray scale computer signal with
computer1 [rGB]
. E nter the service mode, select group no. "
7
no. " " (Red) or "
respectively to make a proper white balance.
Confirm that the same white balance is obtained in video
and computer input.
⁄0 White Balance adjustment [Video]
1. R eceive the 16-step grey scale composite video sig-
Video
nal with
. E nter the service mode, select group no. "
7
no. " " (Red) or "
respectively to make a proper white balance.
Confirm that the same white balance is obtained in video
and computer input.
⁄1 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 sepa-
rately.
The software can be ordered as follows;
coLor SHAdING correctIoN Ver. 4.00
Service Parts No.
⁄2 Filter Calibration adjustment
" (+)
1. E nter the service mode, select group no. "
0
item no. " " .
. T o start the adjustment, change data value from "
1
to " ". After the auto-calbration completed, "OK" will
appear on the screen.
IMPORTANT
T his adjustment must be performed when the air filter is
replaced with new one or cleaned up.
-6-
mode.
8
" (Blue), and change Data values
mode.
8
" (Blue), and change Data values
645 075 9611
100
" item
100
" item
251
" and
0
"