Sanyo MS6A Service Manual page 28

Electrical Adjustments
PC Offset adjustment
1. Receive the 16-step gray scale computer signal.
2. Set to COMPUTER mode.
3. Enter the service mode.
[R-OFFSET ADJUSTMENT]
4. Connect an oscilloscope to test point "
and chassis ground (-).
3
5. Select group no. " ", item no. "
value to adjust the waveform "a" (black portion ) to
be maximum amplitude.
[G-OFFSET ADJUSTMENT]
6. Connect an oscilloscope to test point "
and chassis ground (-).
3
7. Select group no. " ", item no. "
value to adjust the waveform "a" (black portion ) to
be maximum amplitude.
[B-OFFSET ADJUSTMENT]
8. Connect an oscilloscope to test point "
and chassis ground (-).
3
9. Select group no. " ", item no. "
value to adjust the waveform "a" (black portion ) to
be maximum amplitude.
Black Level
TP25R1
" (+)
11
" and change data
TP25G1
" (+)
12
" and change data
TP25B1
" (+)
13
" and change data
(a)
-28-
PC Gain adjustment
1. Receive the 16-step gray scale computer signal.
2. Set to COMPUTER mode.
3. Enter the service mode.
[R-GAIN ADJUSTMENT]
4. Connect an oscilloscope to test point "
and chassis ground (-).
2
5. Select group no. " ", item no. "
value to adjust waveform "a" to be minimum ampli-
tude.
[G-GAIN ADJUSTMENT]
6. Connect an oscilloscope to test point "
and chassis ground (-).
2
7. Select group no. " ", item no. "
value to adjust waveform "a" to be minimum ampli-
tude.
[B-GAIN ADJUSTMENT]
8. Connect an oscilloscope to test point "
and chassis ground (-).
2
9. Select group no. " ", item no. "
value to adjust waveform "a" to be minimum ampli-
tude.
(a)
TP25R1
" (+)
3
" and change data
TP25G1
" (+)
4
" and change data
TP25B1
" (+)
5
" and change data
White Level