XG-C50XE (serv.man11). Troubleshooting - Sharp Projector Service Manual (repair manual). Page 17

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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.
Select INPUT3 using the set's key 
or the remote controller.
Does the picture appear?
Go to "Checking of Video 
Sync Signal".
Carry out the process 
adjustment.
Is there any disturbance in the 
picture?
Go to "Checking of Video 
Sync Signal".
Are the colors normal?
The video input is normal. End.
Is the video signal inputted to 
C8141?
Is there the signal at R8114?
Is there the signal at pin (3) 
of SC8002?
R8114 or its periphery is 
defective.
Q8002 or its periphery is 
defective.
The INPUT/OUTPUT PWB is 
defective.
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