Common Center Adjustment - Eiki LC-WB42N Service Manual

Electrical Adjustments
6. Auto Calibration adjustment [Video]
1. Enter the service mode.
2. Receive the 16-step grey scale composite video sig-
Video [Video]
nal with
. 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.
2. Receive the 16-step grey scale composite video signal
Video [Video]
with mode.
. Connect an oscilloscope to test point "
and chassis ground (-).
20
4. Select group no. " " , item no. "
a
amplitude " " to be minimum by changing the Data
value.
White Level
(a)

7. Common Center adjustment

1. Enter the service mode.
2. Receive the 50%-Whole Gray computer signal with
computer2 [rGB] mode.
104
. Select group no. "
2
data value to " " to reduce the panel frequency.
4. Project only green light component to the screen.
105
5. Select group no. "
data value to obtain the minimum flicker on the
screen.
6. Project only red light component to the screen.
9
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.
11"
9. Select item no. " and change data value to obtain
the minimum flicker on the screen.
104
10. Select group no. "
0
data value to " " to reset the panel frequency.
mode.
260 0
" , item no. " " and then
0 1
" to " " . After the auto-cali-
tP35G
0
" and adjust the
76
" , item no. " " and change
10
" , item no. " " and change
76
" , item no. " " and change
8. 50% White adjustment [PC]
1. Enter the service mode.
2. Receive the 16-step grey scale computer signal with
computer2 [rGB]
. Connect an oscilloscope to test point "
and chassis ground (-).
4. Select group no. "
data value to adjust amplitude "
white level
" (+)
9. White Balance adjustment [PC]
1. Enter the service mode.
2. Receive the 16-step gray scale computer signal with
computer2 [rGB]
. Select group no. "
223
" " (Blue), and change Data values respectively to
make a proper white balance.
Confirm that the same white balance is obtained in vid-
eo and computer input.
10. 50% White adjustment [Video]
1. Enter the service mode.
2. Receive the 16-step grey scale composite video sig-
Video[Video]
nal with
. Connect an oscilloscope to test point "
and chassis ground (-).
5. Select group no. "
data value to adjust amplitude "
white level
-0-
mode.
tP35G
104 220
" , item no. " " and change
a 1.2V
" to be
(a)
white level
mode.
104 217
" item no. " " (Red) or
mode.
tP35G
104 220
" , item no. " " and change
a 1.2V
" to be
(a)
white level
" (+)
.
" (+)
.