Sanyo PLC-EF10BA, Service Manual

Page: 32 / 125

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Electrical Adjustments
Presetting
1. Receive the 16-step grey scale video signal.
2. Set to VIDEO mode.
[R-PEDESTAL ADJUSTMENT-2]
3. Connect an oscilloscope to test point “TP1501” (+)
and chassis ground (-).
4. Enter to the service mode, select Data no. “00B” and
change data value to adjust the pedestal level and
black level to be same level.
[G-PEDESTAL ADJUSTMENT-2]
5. Connect an oscilloscope to test point “TP1531” (+)
and chassis ground (-).
6. Select Data no. “00D” and change data value to adjust
the pedestal level and black level to be same level.
[B-PEDESTAL ADJUSTMENT-2]
7. Connect an oscilloscope to test point “TP1561” (+)
and chassis ground (-).
8. Select Data no. “00F” and change data value to adjust
the pedestal level and black level to be same level.
Pedestal level = Black level
PEDESTAL ADJUSTMENT-[AV]
Presetting
1. Receive the 16-step grey scale video signal.
2. Set to VIDEO mode.
[R-GAIN ADJUSTMENT-2]
3. Connect an oscilloscope to test point “TP1501” (+)
and chassis ground (-).
4. Enter to the service mode, select data no. “00C” and
change data value to adjust “a” to be minimum ampli-
tude.
[G-GAIN ADJUSTMENT-2]
5. Connect an oscilloscope to test point “TP1531” (+)
and chassis ground (-).
6. Select data no. “00E” and change data value to adjust
“a” to be minimum amplitude.
[B-GAIN ADJUSTMENT-2]
7. Connect an oscilloscope to test point “TP1561” (+)
and chassis ground (-).
8. Select data no. “010” and change data value to adjust
“a” to be minimum amplitude.
Pedestal level = Black level
(a)
GAIN ADJUSTMENT-[AV]