Eiki LC-NB3E NRS adjustment, Signal Center adjustment, Black Level adjustment, Black Adjustment

Electrical Adjustments

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 4.8 ±0.1V.

(a)

Signal Center adjustment

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

2.Set to COMPUTER mode.

3.Enter the service mode.

[R-SIGNAL CENTER ADJUSTMENT]

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.

[G-SIGNAL CENTER ADJUSTMENT]

Black Level adjustment

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

2.Set to COMPUTER mode.

3.Enter the service mode.

[R-BLACK ADJUSTMENT]

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.

[R-BLACK ADJUSTMENT-]

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.

[R-BLACK ADJUSTMENT-]

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

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.

[B-SIGNAL CENTER ADJUSTMENT]

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.

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