Sharp PG-M20XU Service Manual page 41

» PC I/F Unit-5/12
Checking of Sync Signal
Is there the vertical sync signal at
pin (11) of IC8363?
Yes
Is there the horizontal sync signal
at pin (5) of IC8363?
Yes
Is there the vertical sync signal at
TL8131?
Yes
Is there the horizontal sync signal
at TL8130?
Yes
Are both the vertical and horizontal
signals in appropriate timing?
No
Is the signal generator
(input source) appropriate?
Yes
IC8330, IC8331 or its periphery
is defective.
No
No
Make confirmation of input signal
setting.
IC8330, IC8331 or its periphery
is defective.
No
No
IC8363 is defective.
Yes
The sync signal is normal.
End of checking.
No
Set the signal source appropriately.
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PG-M20S
PG-M20X