Sharp XG-C50XE (serv.man11) Service Manual ▷ View online
44
XG-C50X
Yes
Yes
No
No
Checking of SOG Circuit
Measure the signal at pin (2) of
IC8365 on the oscilloscope.
IC8365 on the oscilloscope.
Is the composite sync signal
reproduced in correct timing?
reproduced in correct timing?
The SOG circuit is normal. End.
Measure the land of C8070 on the
oscilloscope.
oscilloscope.
Is there the Y signal including sync
signal?
signal?
Go to "Confirmation of Input Signal
Setting".
Setting".
The SOG sync separation circuit
(INPUT PWB) is defective.
(INPUT PWB) is defective.
TROUBLE SHOOTING TABLE for PC I/F UNIT (Continued)
45
XG-C50X
TROUBLE SHOOTING TABLE for PC I/F UNIT (Continued)
Yes
No
Yes
No
No
Yes
Yes
Yes
No
No
Yes
No
5
6
5
Checking of Video Input
Feed the composite video signal
to INPUT3.
to INPUT3.
Select INPUT3 using the set's key
or the remote controller.
or the remote controller.
Does the picture appear?
Go to "Checking of Video
Sync Signal".
Sync Signal".
Carry out the process
adjustment.
adjustment.
Is there any disturbance in the
picture?
picture?
Go to "Checking of Video
Sync Signal".
Sync Signal".
Are the colors normal?
The video input is normal. End.
Is the video signal inputted to
C8141?
C8141?
Is there the signal at R8114?
Is there the signal at pin (3)
of SC8002?
of SC8002?
R8114 or its periphery is
defective.
defective.
Q8002 or its periphery is
defective.
defective.
The INPUT/OUTPUT PWB is
defective.
defective.
46
XG-C50X
TROUBLE SHOOTING TABLE for PC I/F UNIT (Continued)
Yes
Yes
Yes
No
No
No
6
7
Check the clock signal of IC8015
by FL8114.
by FL8114.
Is the clock signal normal?
IC8015 is defective.
Go to "Checking of Video Sync
Signal".
Signal".
IC8025 or its periphery is defective.
Checking of Video Sync Signal
Measure the signal at pin (10) of
IC8363 on the oscilloscope.
(Checking of vertical sync signal)
IC8363 on the oscilloscope.
(Checking of vertical sync signal)
Is the vertical sync signal normal?
Measure the signal at pin (6) of
IC8363 on the oscilloscope.
(Checking of horizontal sync signal)
IC8363 on the oscilloscope.
(Checking of horizontal sync signal)
Is the horizontal sync signal
normal?
normal?
Go to "Confirmation of Input
Signal Setting".
Signal Setting".
47
XG-C50X
TROUBLE SHOOTING TABLE for PC I/F UNIT (Continued)
Yes
Yes
No
No
7
Are the horizontal and vertical sync
signals outputted at TL8130 and
TL8131, respectively?
signals outputted at TL8130 and
TL8131, respectively?
IC8015 or its periphery is
defective.
defective.
Is there the specified clock
(13.5 MHz) signal at FL8114?
(13.5 MHz) signal at FL8114?
IC8015 or its periphery is
defective.
defective.
End.
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