Sanyo PLC-XU45 X12 Pedestal adjustment, C12 NRS adjustment, V12 Signal Center adjustment

Electrical Adjustments

x12 Pedestal adjustment

1.Receive the 16-step grey scale video signal.

2.Set to VIDEO mode.

3.Enter the service mode.

4.Connect an oscilloscope to test point “TP201R” (+) and chassis ground (-).

5.Select group no. “3”, item no. “14” and change data value to adjust the pedestal level and black level to be the same level.

6.Connect an oscilloscope to test point “TP201G” (+) and chassis ground (-).

7.Select group no. “3”, item no. “15” and change data value to adjust the pedestal level and black level to be the same level.

8.Connect an oscilloscope to test point “TP201B” (+) and chassis ground (-).

9.Select group no. “3”, item no. “16” and change data value to adjust the pedestal level and black level to be the same level.

(a)

Pedestal level = Black level

c12 NRS adjustment

1.Receive the 16-step grey scale computer signal.

2.Set to COMPUTER mode.

3.Connect an oscilloscope to test point “TP3551” (+) and chassis ground (-).

4.Enter the service mode, select group no. “3”, item no. “7” and change data value to adjust amplitude “a” to be 5.5 ±0.1V.

(a)

v12 Signal Center adjustment

1.Receive the 16-step grey scale computer signal.

2.Set to COMPUTER mode.

3.Enter the service mode.

4.Connect a digital voltmeter to test point “TP25R1” (+) and chassis ground (-).

5.Select group no. “3”, item no. “0” and change data value to adjust the voltage to be 7.30 ±0.05V.

6.Connect a digital voltmeter to test point “TP25G1” (+) and chassis ground (-).

7.Select group no. “3”, item no. “1” and change data value to adjust the voltage to be 7.30 ±0.05V.

8.Connect a digital voltmeter to test point “TP25B1” (+) and chassis ground (-).

9.Select group no. “3”, item no. “2” and change data value to adjust the voltage to be 7.30 ±0.05V.

bBlack Level adjustment

1.Receive the 16-step grey scale computer signal.

2.Set to COMPUTER mode.

3.Enter the service mode.

4.Connect an oscilloscope to test point “TP25R1” (+) and chassis ground (-).

5.Select group no. “3”, item no. “3” and change data value to adjust amplitude “a” to be 10.0 ±0.1V.

6.Connect an oscilloscope to test point “TP25G1” (+) and chassis ground (-).

7.Select group no. “3”, item no. “4” and change data value to adjust amplitude “a” to be 10.0 ±0.1V.

8.Connect an oscilloscope to test point “TP25B1” (+) and chassis ground (-).

9.Select group no. “3”, item no. “5” and change data value to adjust amplitude “a” to be 10.0 ±0.1V.

black level

(a)

black level

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