Sharp XG-PH70X Service Manual page 51

Checking the RGB input
Feed the sync separation analog RGB signal to INPUT1.
1
Select INPUT1 by using the panel key or remote control.
2
Is a picture displayed?
Is a picture distorted?
3
Are three colors (R, G and B) displayed?
Perform AUTOSYNC.
Is the contour displayed properly?
Are vertical stripe patterns distorted?
End
Video input check
Go to "Input signal setting check".
Is a video signal applied to the land
of C8165?
YES
Go to "Checking the sync signal".
IC8025 or IC8017 is defective.
YES
NO
YES
YES
NO
NO Is signal applied to the pin 13 of
SC8001 (B to B connector)?
The signal path is defective.
Check CRs from SC8001 to IC8017.
XG-PH70X/XG-PH70X-N (1st. Edition)
NO Go to "Video input check".
YES Go to "Checking of sync signal".
NO Go to "RGB signal check".
NO IC8017 or the periphery of IC8025 is defective.
YES IC8017 or the periphery of IC8025 is defective.
NO
YES
4 – 9
The signal source or connector is defec-
tive.