Sharp XV-Z7000 (serv.man5) Service Manual ▷ View online
41
XV-Z7000U/E
AN-Z7T
YES
YES
YES
YES
YES
YES
Checking the component
inputs (720P, 1080I)
inputs (720P, 1080I)
Feed the component signal
to INPUT2.
to INPUT2.
Select INPUT2 on the set
or the remote control.
or the remote control.
Are there output signals at
pins (16), (18) and (20) of
IC8012?
pins (16), (18) and (20) of
IC8012?
Are there output signals at
pins (1), (3) and (5) of
IC8012?
pins (1), (3) and (5) of
IC8012?
Does "NO SIGNAL"
appear on the screen?
appear on the screen?
Does an image appear on the
screen?
screen?
End.
Make the process adjustment.
Check IC8012 and its
peripheral circuits.
peripheral circuits.
Check the connecting
terminal PWB.
terminal PWB.
Check IC8032, IC8006 and
their peripheral circuits.
their peripheral circuits.
Go to "Checking the
digital processing
digital processing
Go to "Checking the
SOG circuit".
SOG circuit".
Are the colors as
specified?
NO
NO
NO
NO
Is there output signal at
pins (5) of IC8032?
pins (5) of IC8032?
NO
NO
4
4
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
43
XV-Z7000U/E
AN-Z7T
Checking the video sync
signal
Using the oscilloscope,
measure the signal at
TL8006. (Check the
vertical sync signal.)
measure the signal at
TL8006. (Check the
vertical sync signal.)
Using the oscilloscope,
measure the signal at
TL8009. (Check the
horizontal sync signal.)
measure the signal at
TL8009. (Check the
horizontal sync signal.)
NO
NO
NO
YES
Is there signal with half the
vertical frequency at
TP8010?
vertical frequency at
TP8010?
YES
Is there 27MHz or so clock
signal at FL8034?
signal at FL8034?
YES
Is there 13.5MHz or so
clock signal at FL8034?
clock signal at FL8034?
IC8003 or its peripheral
circuit defective.
circuit defective.
End
YES
YES
YES
Is the vertical sync signal
as specified?
as specified?
If out of spec again,
IC8003 or its peripheral
circuit defective.
IC8003 or its peripheral
circuit defective.
Is the horizontal sync
signal as specified?
signal as specified?
Is there 15kHz or so signal
at TP8007?
at TP8007?
Go to "Checking the input
signal setting".
signal setting".
NO
NO
NO
44
XV-Z7000U/E
AN-Z7T
Checking the digital signal
processing circuit
Is there 40MHz or so clock
signal at FL8024?
signal at FL8024?
Is there 38kHz or so pulse
(sync) signal at FL8026?
(sync) signal at FL8026?
Is there 60Hz or so pulse
(sync) signal at FL8025?
(sync) signal at FL8025?
NO
NO
End
YES
YES
NO
YES
IC8022, IC8021 or their
peripheral circuit defective.
peripheral circuit defective.
Go to "Checking the PLL
circuit".
circuit".
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