Sharp PG-M20XU Service Manual page 46

PG-M20S
PG-M20X
» PC I/F Unit-10/12
Checking of Video Input
Feed the composite video signal to
INPUT 3.
Select INPUT 3 using the set's key
or the remote controller.
5
Is the picture appear?
Is there any disturbance in the
picture?
Is the color normal?
The video input is normal. End.
Is the video signal inputted to
C8141?
Check the clock signal of IC8015
by FL8114.
Is the clock signal normal?
Go to "Checking of Video Sync
Signal".
IC8025 and its periphery are
defective.
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
Go to "Checking of Video
Sync Signal".
Is there the specified signal
at R8114?
Yes
Q8002 and its periphery are
defective.
IC8015 is defective.
46
Go to "Checking of Video
Sync Signal".
Carry out the process
adjustment.
5
No
Input PWB is defective.