Sharp XV-Z9000E (serv.man12) Service Manual ▷ View online
41
XV-Z9000U/E
NO
YES
YES
Checking the SOG circuit
Is the composite sync
signal played back timely?
signal played back timely?
Measure the signal at
TL8136 on the
oscilloscope.
TL8136 on the
oscilloscope.
NO
Is there the Y signal
including the sync signal?
including the sync signal?
Measure the land of C8069
on the oscilloscope.
on the oscilloscope.
Go to “Checking the input
signal settings”.
signal settings”.
SOG sync separation
circuit defective.
circuit defective.
Input PWB defective.
There is no problem with
the SOG circuit. End.
the SOG circuit. End.
NO
Checking the on-screen
display.
Go to “Checking the GA4
peripheral circuits”.
peripheral circuits”.
Get the flash ROM
reprogrammed.
reprogrammed.
Carry out the output line
adjustment in the
adjustment process.
adjustment in the
adjustment process.
Is the on-screen display
color as specified?
color as specified?
YES
0
42
XV-Z9000U/E
Select VIDEO as the type
of signal on the user menu.
of signal on the user menu.
Using the front panel key
or the remote control,
select INPUT4.
or the remote control,
select INPUT4.
Checking the video input
Feed the composite video
signal to INPUT4.
signal to INPUT4.
Is the image disturbed?
NO
YES
YES
Is there the video signal at
pin (72) of IC8338?
pin (72) of IC8338?
Is the video signal as
specified?
specified?
IC8338 defective.
NO
NO
Does the image appear?
Carry out the process
adjustment.
adjustment.
Is the contour as specified?
There is no problem with
the video input. End.
the video input. End.
Go to "Checking the video
sync signal".
sync signal".
Go to "Checking the video
sync signal".
sync signal".
NO
YES
NO
YES
5
5
6
43
XV-Z9000U/E
6
7
Checking the video sync
signal
Using the oscilloscope,
measure the signal at
TL8140. (Check the
vertical sync signal.)
measure the signal at
TL8140. (Check the
vertical sync signal.)
Using the oscilloscope,
measure the signal at
TL8142. (Check the
horizontal sync signal.)
measure the signal at
TL8142. (Check the
horizontal sync signal.)
NO
NO
YES
Measure the VPC (IC8338)
clock signal at TL8004.
clock signal at TL8004.
Is the clock signal as
specified?
specified?
Go to “Checking the video
sync signal”.
sync signal”.
IC8338 defective.
IC8025 or its peripheral
circuit defective.
YES
YES
Is the vertical sync signal
as specified?
as specified?
Input PWB defective.
Is the horizontal sync
signal as specified?
signal as specified?
Go to "Checking the input
signal setting".
signal setting".
NO
44
XV-Z9000U/E
3
Checking the DSUB input.
Feed the PC-RGB signal to INPUT5.
Select INPUT5 as the input.
Check to see if there are the R, G
and B signals at pins (126), (136)
and (146) of IC8004.
and B signals at pins (126), (136)
and (146) of IC8004.
DSUB connector
or its peripheral
part defective.
or its peripheral
part defective.
IC8302 or its peripheral circuit
defective.
defective.
IC8025, IC8004 or their peripheral
circuit defective.
circuit defective.
NO
YES
NO
YES
Does the image appear?
Are there the R, G and B signals?
YES
NO
Is there any distortion with the image?
Check the vertical and horizontal sync
signals at pin (6) of IC8364 and pin (6)
of IC8385.
signals at pin (6) of IC8364 and pin (6)
of IC8385.
Sync separation circuit, IC8354m
IC8365 or their peripheral circuit
defective.
IC8365 or their peripheral circuit
defective.
NO
NO
YES
Are the sync signals as specified?
YES
Are there the horizontal and vertical sync
signals at TL8130 and TL8131?
signals at TL8130 and TL8131?
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