Read Sharp XG-NV7XE (serv.man3) Service Manual online
34
XG-NV7XE
XG-NV7XM
TROUBLE SHOOTING TABLE
(Continued)
No or unusual Y signal
Yes
No
Go back to the signal processing
block.
block.
No
Check IC801 and its peripheral
circuits.
circuits.
Yes
No
Check IC805 and its peripheral
circuits as well as IC807 (AGC).
circuits as well as IC807 (AGC).
Yes
Check IC805 and its peripheral
circuits.
circuits.
Is there Y signal output at pin (17) of
IC805?
IC805?
Is there Y signal output at pin (40) of
IC801?
IC801?
Is there Y signal input at pin (21) of
IC801?
IC801?
No or unusual horizontal sync
Yes
No
Check IC801 and its peripheral
circuits.
circuits.
Yes
No
Is there horizontal sync pulse output
at pin (9) of IC803?
at pin (9) of IC803?
Check the pulse shaping circuit of
IC802 and IC803.
IC802 and IC803.
Go to "Trouble shooting table for PC
I/F unit".
I/F unit".
Is there horizontal sync pulse output
at pin (56) of IC801?
at pin (56) of IC801?
No or unusual vertical sync
No
Check IC801 and its peripheral
circuits.
circuits.
Yes
Go to "Trouble shooting table for
PC I/F unit".
PC I/F unit".
Is there vertical sync pulse output at
pin (4) of IC801?
pin (4) of IC801?
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