Sharp XV-Z7000U Anleitung Seite 42

XV-Z7000U/E
AN-Z7T
Checking the SOG circuit
Using the oscilloscope,
measure the land of R8231
(pin (32) of IC8026). Is
there composite sync
signal?
Using the oscilloscope,
measure the land of R8110
(base of Q8010). Does the
video signal contain the
sync signal?
IC8008, IC8009, IC8031 or
their peripheral circuit
defective.
Checking the video input
Feed the specified video
signal.
Select VIDEO with the
set's key or remote control
button.
Does an image appear?
Is the image disturbed?
Are the colors as
specified?
End
IC8003 or its peripheral
circuit defective.
YES
NO
NO
Is there video signal with
sync signal at pin (18) of
YES
IC3002 connection
terminal PWB?
SC3003 or its peripheral
circuit defective.
NO
YES
YES
NO
NO
YES
Go to "Checking the
video sync signal".
End
YES
YES
Is there video signal at pin
(73) of IC8003?
Is there video signal at pin
(7) of IC3403 connection
terminal PWB?
IC3403 or its peripheral
circuit defective. Or
SC3003 in poor contact.
J3303 or its peripheral
circuit defective.
42
NO
IC3002 connection
terminal PWB or its
peripheral circuit defective.
NO
NO
YES