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