No Or Unusual Horizontal Sync - Sharp XG-V10WU Service Manual

XG-V10WU
AN-SD1U/S422U
TROUBLE SHOOTING TABLE
No or unusual Y signal
Is there Y signal input at pin (21) of
IC803?
Yes
Is there Y signal output at pin (40) of
IC803?
Yes
Is there Y signal output at pin (17) of
IC804?
Yes
Check IC804 and its peripheral
circuits.

No or unusual horizontal sync

Is there horizontal sync pulse output
at pin (56) of IC803?
Yes
Is there horizontal sync pulse output
at pin (9) of IC802?
Yes
Go to "Trouble shooting table for PC
I/F unit".
No or unusual vertical sync
Is there vertical sync pulse output at
pin (4) of IC803?
Yes
Go to "Trouble shooting table for
PC I/F unit".
No
Go back to the signal processing
block.
No
Check IC803 and its peripheral
circuits.
No
Check IC804 and its peripheral
circuits as well as IC806 (AGC).
No
Check IC803 and its peripheral
circuits.
No
Check the pulse shaping circuit of
IC801 and IC802.
No
Check IC803 and its peripheral
circuits.
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