Read Sharp XG-PH70X (serv.man4) Service Manual online
XG-PH70X/XG-PH70X-N
4 – 9
Checking the RGB input
Feed the sync separation analog RGB signal to INPUT1.
Select INPUT1 by using the panel key or remote control.
Is a picture displayed?
NO
Go to "Video input check".
YES
Is a picture distorted?
YES
Go to "Checking of sync signal".
NO
Are three colors (R, G and B) displayed?
NO
Go to "RGB signal check".
YES
Perform AUTOSYNC.
Is the contour displayed properly?
NO
IC8017 or the periphery of IC8025 is defective.
YES
Are vertical stripe patterns distorted?
YES
IC8017 or the periphery of IC8025 is defective.
NO
End
Video input check
Go to "Input signal setting check".
Is a video signal applied to the land
of C8165?
NO
Is signal applied to the pin 13 of
SC8001 (B to B connector)?
SC8001 (B to B connector)?
NO
The signal source or connector is defec-
tive.
tive.
YES
YES
Go to "Checking the sync signal".
The signal path is defective.
Check CRs from SC8001 to IC8017.
Check CRs from SC8001 to IC8017.
IC8025 or IC8017 is defective.
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