Eiki LC-NB3E PC Offset adjustment, PC Gain adjustment, Offset Adjustment, Gain Adjustment

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 “TP25R1” (+) and chassis ground (-).

5.Select group no. “3”, item no. “11” and change data value to adjust the waveform “a” (black portion ) to be maximum amplitude.

[G-OFFSET ADJUSTMENT]

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

7.Select group no. “3”, item no. “12” and change data value to adjust the waveform “a” (black portion ) to be maximum amplitude.

[B-OFFSET ADJUSTMENT]

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

9.Select group no. “3”, item no. “13” and change data value to adjust the waveform “a” (black portion ) to be maximum amplitude.

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 “TP25R1” (+) and chassis ground (-).

5.Select group no. “2”, item no. “3” and change data value to adjust waveform “a” to be minimum ampli- tude.

[G-GAIN ADJUSTMENT]

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

7.Select group no. “2”, item no. “4” and change data value to adjust waveform “a” to be minimum ampli- tude.

[B-GAIN ADJUSTMENT]

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

9.Select group no. “2”, item no. “5” and change data value to adjust waveform “a” to be minimum ampli- tude.

White Level

(a)

(a)

Black Level

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