Moire Cancel Failure - NEC MultiSync FP1370 Service Manual

14. MOIRE CANCEL FAILURE

Operate the moire cancel control, and check the moire cancel control signal.
When the moire cancel control is max. condition, IC501 pin 22 waveform is as follows.
Only horizontal signal is NG.
NG
Check the vertical moire cancel control signal.
OK
･R513 failure.
･IC501 failure.
･Digital control circuit failure. (see item 12)
OK
･C512, R511 or R508 failure.
･IC501 failure.
vertical period
horizontal period
･IC501 failure.
･Digital control circuit failure. (see item 12)
When the moire cancel control is max. condition, C513 waveform is as follows.
vertical period
･R512 or C513 failure.
NG
･IC501 failure.
･Digital control circuit failure. (see item 12)
0V
0V
7-33