Sanyo PLC-XU22E Service Manual page 27

Electrical Adjustments
OFFSET ADJUSTMENT-[CG]
1. Receive the 16-step gray scale video signal.
2. Set to COMPUTER mode.
[R-OFFSET ADJUSTMENT]
3. Connect an oscilloscope to test point "TP2211R" (+)
and chassis ground (-).
4. Enter to the service mode, select item no. "45" and
change data value to adjust the pedestal level and
black level to be same level.
[G-OFFSET ADJUSTMENT]
5. Connect an oscilloscope to test point "TP2221G" (+)
and chassis ground (-).
6. Select item no. "46" and change data value to adjust
the pedestal level and black level to be same level.
[B-OFFSET ADJUSTMENT]
7. Connect an oscilloscope to test point "TP2231B" (+)
and chassis ground (-).
8. Select item no. "47" and change data value to adjust
the pedestal level and black level to be same level.
Pedestal level = Black level
VIDEO GAIN ADJUSTMENT-[CG/MCI]
[CG-VIDEO GAIN ADJUSTMENT]
1. Receive the 16-step grey scale computer signal.
2. Set to COMPUTER mode.
3. Connect an oscilloscope to test point "TP2221G" (+)
and chassis ground (-).
4. Enter to the service mode, select item no. "48" and
change data value to adjust "a" to be 1.15 ±0.01Vp-p.
[MCI-VIDEO GAIN ADJUSTMENT] *
5. Receive the 16-step grey scale MCI signal.
6. Set to MCI mode.
7. Connect an oscilloscope to test point "TP2221G" (+)
and chassis ground (-).
8. Enter to the service mode, select item no. "48" and
change data value to adjust "a" to be 1.15 ±0.01Vp-p.
Pedestal level = Black level
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(a)