Eiki LC-NB3E - Manual (Page 28)

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Electrical Adjustments
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)
PC Gain 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.
Black Level
(a)
PC Offset adjustment