Sharp XG-C55X Service Manual page 44

XG-C55X
TROUBLE SHOOTING TABLE for PC I/F UNIT (Continued)
Confirmation of Video Input
Make "Confirmation of Input
Signal Setting".
Is there the video signal at the land
of C8070?
Yes
Go to "Checking of Sync Signal".
IC8025 or IC8013 is defective.
Confirmation of Input Signal
Setting
Is the right item selected from input
menu?
Yes
Are the connectors connected
correctly?
Yes
End
No
Is there the signal at pin (55) of
SC8002 (B-to-B connector)?
Somewhere in the signal route is
defective. Check the capacitors
and resistors between SC8002
and IC8013.
The signal source or connector is
defective.
No
Select the right item.
2
No
Connect the connectors correctly.
1
44
No
Yes