Sharp XG-PH70X Service Manual page 57

VIDEO sync signal check
Measure TL8016 with an oscilloscope (vertical sync signal
check).
Is the vertical sync signal normal?
YES
Measure TL8015 with an oscilloscope (horizontal sync signal
check).
Is the horizontal sync signal normal?
YES
Are the horizontal and vertical sync signals sent to R8030 and
TL8029?
YES
Is the specified clock (1.6 MHz) sent to Q8002 (B)?
YES
End
Checking of S-Video input
Feed the S-VIDEO signal to INPUT5.
Select INPUT5 by using the panel key
or remote control.
7
Is a picture sent?
YES
Is a picture distorted?
NO
Are colors normal?
YES
End
NO Go to "Input signal setting check".
NO Go to "Input signal setting check".
NO IC8010 is defective.
NO IC8010 is defective.
NO Go to "VIDEO sync signal check".
YES Go to "VIDEO sync signal check".
NO Is the color difference signal fed to
C8095?
NO
Is the signal applied to R8090?
NO
Is the signal applied to the pin (21)
of SC8001?
NO
The terminal PWB is defective.
4 – 15
XG-PH70X/XG-PH70X-N (1st. Edition)
Execute the process adjustment.
7
YES IC8010 is defective.
YES The peripheries of Q8006, 8008
and 8010 are defective.
YES The periphery of R8090 is defec-
tive.