Common Center Adjustment - Eiki LC-WB200 Service Manual

Electrical Adjustments
Below adjustments are performed when the above auto
calibration is failed.
Gain adjustment [Component]
Input mode Computer 1 (Component)
Input signal 1080i component signal
Signal pattern 16-step gray scale
Equipment Oscilloscope
1. Enter the service mode.
200
. Select Group " ", No. "
1
to " ".
a
3. Adjust the amplitude "
point to be minimum by changing the data value of
Group - No.
Group - No. Test Point
0 - 3 TP35R
0 - 4 TP35G
0 - 5 TP35B
200
4. Select Group " ", No. "
0
" ".
a
5. Adjust the amplitude "
point to be minimum by changing the data value of
Group - No.
Group - No. Test Point
10 - 3 TP35R
10 - 4 TP35G
10 - 5 TP35B
200
6. Select Group " ", No. "
1
to " ".
White Level
(a)
4. Auto Calibration adjustment [Video]
Input mode Video
Input signal Composite video signal
Signal pattern 16-step gray scale
1. Enter the service mode.
. To start the auto-calibration for Component adjust-
260
ment, select Group "
0
data value from " " to "
OK
completed, " " will appear on the screen.
71
" and set the data value
" of waveform at each test
71
" and set data value to
" of waveform at each test
71
" and set the date value
0
", No. " " and then change
1
". After the auto-calibration
Below adjustment is performed when the above auto
calibration is failed.
Gain adjustment [Video]
Equipment Oscilloscope
1. Enter the service mode.
. Adjust the amplitude "
to be minimum by changing the data value of Group
- No.
Group - No. Test Point
20 - 0 TP35G
(a)

5. Common Center adjustment

Input mode
Input signal
Signal patterns 50% R, G, B whole signals
1. Enter the service mode
104
. Select Group "
2
value to " " to reduce the panel frequency.
3. Change data value to obtain the minimum flicker for
each color on the screen.
Group - No. Adjustment
105 - 9 for red flicker
105 - 10 for green flicker
105 - 11 for blue flicker
104
4. Select Group "
0
value to " " to reset the panel frequency.
-33-
a
" of waveform at the test point
White Level
Computer 1 (Analog PC)
XGA computer signal
76
", No. " " and change the data
76
", No. " " and change the data