Sharp XV-C100A Service Manual page 26

XV-C100A/M/E
TROUBLE SHOOTING TABLE (Continued)
No horizontal sync
Is there horizontal drive signal output
at pin (56) of IC801?
Yes
Are video signal at pin (21) or (29) of
IC801 and horizontal drive signal at
pin (58) of IC801 in sync with each
other?
Yes
Is there horizontal sync signal output
at pin (10) of IC503?
Yes
Is there composite sync signal output
at pin (4) of IC504?
Yes
Check IC1603, IC1607, IC1608 and
all located on the control PWB. Check
also their peripheral parts.
No vertical sync
Is there vertical sync signal output at
pin (4) of IC801?
Yes
Is there vertical sync signal input at
pin (11) of IC502?
Yes
Is there vertical sync signal output at
pin (10) of IC502?
Yes
Check IC1606 and its peripheral
parts.
26
Check pins (17) and (18)
No
of IC801, IC501 and their
peripheral circuits.
No Check pins (58) and
(59) of IC801 and their
peripheral parts.
No
Check IC503 and its
peripheral circuits.
No
IC504 defective.
No
Check IC801 and its
peripheral circuits.
No
Check Q827.
No
Check IC502 and its
peripheral parts.