Canon D78-5311, Руководство по обслуживанию

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2.10 AV Gain Adjustment
1. Receive the 16-step gray scale video signal.
2. Set to
VIDEO
mode.
3. Enter the service mode.
[R gain adjustment]
4. Connect an oscilloscope to test point "TP25R1" (+) and chassis ground (-).
5. Select item no. "3" of group no. "2" and change data value to adjust it so that
waveform "a" has the minimum amplitude.
[G gain adjustment]
6. Connect an oscilloscope to test point "TP25G1" (+) and chassis ground (-).
7. Select item no. "4" of group no. "2" and change data value to adjust it so that
waveform "a" has the minimum amplitude.
[B gain adjustment]
8. Connect an oscilloscope to test point "TP25B1" (+) and chassis ground (-).
9. Select item no. "5" of group no. "2" and change data value to adjust it so that
waveform "a" has the minimum amplitude.
2.11 Common Center Adjustment
1. Receive the 1 dot line computer signal.
2. Set to
COMPUTER
mode.
3. Enter the service mode.
[G-common center adjustment]
4. Project the green light component on the screen.
5. Select item no. "8" of group no. "3" and change data value to adjust it so that the
slicker on the screen is minimized.
[B-common center adjustment]
6. Project the blue light component on the screen.
7. Select item no. "9" of group no. "3" and change data value to adjust it so that the
slicker on the screen is minimized.
[R-common center adjustment]
8. Project the red light component on the screen.
9. Select item no. "10" of group no. "3" and change data value to adjust it so that the
slicker on the screen is minimized.
Part 3: Adjustment
3-14
White Level
(a)
Fig. 3-7