Read Sharp XV-Z21000 (serv.man3) Service Manual online
XV-Z20000/XV-Z21000/DT-5000
5 – 8
Check the synchronization signal.
Is the signal generator (input source)
set correctly?
set correctly?
NO
Set the signal generator (input source)
correctly.
correctly.
YES
Is a vertical synchronization signal
present at TL5505?
present at TL5505?
NO
Peripheral circuits of IC5502 and 5503 are
defective.
Or the main unit is defective.
defective.
Or the main unit is defective.
YES
Is a horizontal synchronization signal
present at TL5504?
present at TL5504?
NO
Peripheral circuits of IC5502 and 5503
are defective.
Or the main unit is defective.
are defective.
Or the main unit is defective.
YES
Is a vertical synchronization signal
present at TL5515?
present at TL5515?
NO
The IC5504, IC5510 or IC5511 peripheral
parts are defective.
parts are defective.
YES
Is a horizontal synchronization signal
present at TL5509?
present at TL5509?
NO
The IC5504, IC5510 or IC5511 peripheral
parts are defective.
parts are defective.
YES
Synchronization signals are normal.
IC5652 peripheral check
Set the signal generator to output a
RAMP signal.
RAMP signal.
Is a synchronization signal present at
R5610 and TL5515?
R5610 and TL5515?
NO
The IC5511 peripheral parts or IC6001
(CVIC) are defective.
(CVIC) are defective.
YES
Is a clock signal present at R5679?
NO
The IC5652 clock oscillation circuit or
IC5652 is defective.
IC5652 is defective.
YES
Are video signals sent to TL5655?
TL5661?
TL5661?
NO
The IC5209 peripheral circuit or the main
unit is defective.
unit is defective.
YES
Is a pulse present at pins (28) - (63)
of IC5652?
of IC5652?
NO
IC5652 is defective.
YES
IC6001 (CVIC) is defective.
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