Read Sharp XV-Z7000 (serv.man5) Service Manual online
42
XV-Z7000U/E
AN-Z7T
NO
YES
YES
Checking the SOG circuit
Using the oscilloscope,
measure the land of R8231
(pin (32) of IC8026). Is
there composite sync
signal?
measure the land of R8231
(pin (32) of IC8026). Is
there composite sync
signal?
NO
Using the oscilloscope,
measure the land of R8110
(base of Q8010). Does the
video signal contain the
sync signal?
measure the land of R8110
(base of Q8010). Does the
video signal contain the
sync signal?
Is there video signal with
sync signal at pin (18) of
IC3002 connection
terminal PWB?
sync signal at pin (18) of
IC3002 connection
terminal PWB?
NO
IC3002 connection
terminal PWB or its
peripheral circuit defective.
terminal PWB or its
peripheral circuit defective.
IC8008, IC8009, IC8031 or
their peripheral circuit
defective.
their peripheral circuit
defective.
YES
SC3003 or its peripheral
circuit defective.
circuit defective.
End
YES
NO
NO
YES
YES
NO
Checking the video input
Feed the specified video
signal.
signal.
Is there video signal at pin
(73) of IC8003?
(73) of IC8003?
Go to "Checking the
video sync signal".
video sync signal".
Is there video signal at pin
(7) of IC3403 connection
terminal PWB?
(7) of IC3403 connection
terminal PWB?
IC3403 or its peripheral
circuit defective. Or
SC3003 in poor contact.
circuit defective. Or
SC3003 in poor contact.
Is the image disturbed?
Does an image appear?
Are the colors as
specified?
specified?
End
IC8003 or its peripheral
circuit defective.
circuit defective.
J3303 or its peripheral
circuit defective.
circuit defective.
Select VIDEO with the
set’s key or remote control
button.
set’s key or remote control
button.
NO
NO
YES
YES
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