Common Center Adjustment - Sanyo PLC-WXU30 Service Manual

Electrical Adjustments
Gain adjustment [component]
1. Enter the service mode.
. Receive the 16-step grey scale computer signal with
computer2 [rGB]
mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
0
4. Select group no. " ", item no. "
a
tude " " to be minimum by changing the Data value.
5. Connect an oscilloscope to test point "
chassis ground (-).
0
6. Select group no. " ", item no. "
a
tude " " to be minimum by changing the Data value.
7. Connect an oscilloscope to test point "
chassis ground (-).
0
8. Select group no. " ", item no. "
a
tude " " to be minimum by changing the Data value.
White Level
(a)
b Auto Calibration adjustment [Video]
1. Enter the service mode.
. Receive the 16-step grey scale composite video sig-
Video [Video]
nal with
3. To start the auto-calibration for Component adjust-
ment, select group no. "
change data value from "
bration completed, "OK" will appear on the screen.
below adjustment is performed when the above auto
calibration is failed.
Gain adjustment [Video]
1. Enter the service mode.
. Receive the 16-step grey scale composite video signal
Video [Video]
with mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
20
4. Select group no. " ", item no. "
a
tude " " to be minimum by changing the Data value.
White Level
(a)
tP_G1
" (+) and
3
" and adjust the ampli-
tP_r1
" (+) and
4
" and adjust the ampli-
tP_B1
" (+) and
5
" and adjust the ampli-
mode.
260 0
", item no. " " and then
0 1
" to " ". After the auto-cali-
tP_G1
" (+) and
0
" and adjust the ampli-
n Common Center adjustment
1. Enter the service mode.
. Receive the 50%-Whole Gray computer signal with
computer2 [rGB] mode.
3. Select group no. "
2
data value to " " to reduce the panel frequency.
4. Project only green light component to the screen.
5. Select group no. "
data value to obtain the minimum flicker on the
screen.
6. Project only red light component to the screen.
0
7. Select item no. "
the minimum flicker on the screen.
8. Project only blue light component to the screen.
2
9. Select item no. "
the minimum flicker on the screen.
10. Select group no. "
0
data value to " " to reset the panel frequency.
m 50% White adjustment [PC]
1. Enter the service mode.
. Receive the 16-step grey scale computer signal with
computer2 [rGB]
3. Connect an oscilloscope to test point "
and chassis ground (-).
4. In Dynamic mode, select group no. "100", item no.
"235" and change data value to "0".
100
5. Select group no. "
value to adjust amplitude "
6. select group no. "100", item no. "235" and change
data value to "1".
white level
, White Balance adjustment [PC]
1. Enter the service mode,
. Receive the 16-step gray scale computer signal with
computer2 [rGB]
100
3. Select group 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.
-9-
100 92
", item no. " " and change
101 1
", item no. " " and change
" and change data value to obtain
and change data value to obtain
100 92
", item no. " " and change
mode.
tP_G1
6
", item no. " " and change data
a 0.85V
" to be .
(a)
white level
mode.
7
" item no. " " (Red) or "
" (+)
8
" (Blue),