Read Sharp XV-Z21000 (serv.man3) Service Manual online
XV-Z20000/XV-Z21000/DT-5000
5 – 12
Check the
VIDEO syn-
chronization
signal.
VIDEO syn-
chronization
signal.
Is a vertical syn-
chronization sig-
nal present at
TL5710?
chronization sig-
nal present at
TL5710?
NO
Is a clock signal
(24.57 MHz)
present at
X5701?
(24.57 MHz)
present at
X5701?
Check the voltage
output of IC5702
and
IC5703.X5701 or
IC5706 is defec-
tive.
output of IC5702
and
IC5703.X5701 or
IC5706 is defec-
tive.
YES
NO
Is a horizontal
synchronization
signal present at
TL5711?
synchronization
signal present at
TL5711?
NO
YES
YES
The VIDEO syn-
chronization sig-
nal is normal.
chronization sig-
nal is normal.
Is a video signal
present at
TL5712?
present at
TL5712?
YES
IC5706 is defec-
tive.
tive.
NO
Is the input signal
525iRGB (or com-
ponent)?
525iRGB (or com-
ponent)?
YES
Is a video signal
present at
TL5703?
present at
TL5703?
YES
IC5706 is defec-
tive.
tive.
NO
NO
Check peripheral
circuits of Q5701
and Q5707.
The main unit is
defective.
circuits of Q5701
and Q5707.
The main unit is
defective.
Is the input signal
composite VIDEO
(CVBS)?
composite VIDEO
(CVBS)?
YES
Is a video signal
present at
TL5707?
present at
TL5707?
YES
Is S-VIDEO pro-
jected normally?
jected normally?
NO
IC5706 is defec-
tive.
tive.
NO
NO
YES
Check peripheral
circuits of Q5706
and Q5712.
The main unit is
defective.
circuits of Q5706
and Q5712.
The main unit is
defective.
Check peripheral
circuits of IC5707.
circuits of IC5707.
Is the input signal
S-VIDEO?
S-VIDEO?
YES
Are video signals
sent to TL5705
and TL5706?
sent to TL5705
and TL5706?
YES
IC5706 is defec-
tive.
tive.
NO
Check peripheral
circuits of Q5704,
Q5705, Q5710
and Q5711.
The main unit is
defective.
circuits of Q5704,
Q5705, Q5710
and Q5711.
The main unit is
defective.
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