Sharp XG-PH70X Service Manual page 56

XG-PH70X/XG-PH70X-N (1st. Edition)
Checking of Video input
Feed the composite VIDEO signal
to INPUT4.
Use keys on the main unit or
remote control to select INPUT4.
5
Is a picture displayed?
YES
Is a picture displayed?
NO
Are colors normal?
S-VIDEO input check
6
Measure the clock of IC8010 at R8048.
Is the clock normal?
Go to "VIDEO sync signal check".
IC8025 is defective.
NO Go to "VIDEO sync signal check".
YES Go to "VIDEO sync signal check".
Is the VIDEO signal fed to C8103?
Is the signal applied to R8092?
Is the signal applied to the pin 23
of SC8001?
The terminal PWB is defective.
YES
YES
NO
YES
NO
YES
NO
NO IC8010 is defective.
4 – 14
Execute the process adjustment.
5
6
The peripheries of Q8007,8009
and 8011 are defective.
The periphery of R8092 is defec-
tive.