NEC Multisync Plus JC-1501VMA Service Manual page 43

D. No Blanking works
Check blanking
(Measure the blanking pulse by S8 )
pulse on the INTERFACE PWB PWE-176
NG
OK
H
V
H/V
I
R529 Failure
I
CD
0449 Failure
CD
TR490, TR493
®
TR443-TR445 Failure
and ambient
®
IC802 Failure
circuit Failure @
0888 Failure
@
1C442, IC443
TR721 , TR722 TR446-TR448
TR713-TR715 and ambient
and ambient circuit
circuit Failure
Failure
@
TR490 Failure
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