Sharp DV-RW250H (serv.man2) Service Manual ▷ View online
TROUBLESHOOTING GUIDE
E-35
NO AUDIO ON PLAYBACK
Is there AUDIO signal at
pin 26, 27 of IC7301 ?
No
No
Check IC7301
and peripheral circuit.
Yes
Yes
Check IC702
and peripheral circuit.
Is there waveform at pin
1, 7 of IC702 ?
Check J8001
and peripheral circuit.
TROUBLESHOOTING GUIDE
E-36
No
Check VCR block.
Yes
Check DVD DECK.
VIDEO CAN NOT
RECORD TO DVD
Is there a signal in at pin 17, 19
of CP7301 and at pin 1, 19 of
CP7302 with each input?
No
Yes
Check IC4001
and peripheral circuit.
Is there a signal in at pin
1~40 of CP4001 ?
No
Yes
Check IC4009
and peripheral circuit.
Is there a signal in at pin
79, 98, 128, 142 of
IC4001 ?
TROUBLESHOOTING GUIDE
E-37
No
Check VCR block.
Yes
Check DVD DECK .
AUDIO CAN NOT
RECORD TO DVD
Is there a signal in at pin 1~15
of CP7301 with each input?
Yes
Check IC4001
and peripheral circuit.
Is there a signal in at pin
1~40 of CP4001 ?
No
Yes
Check IC4009
and peripheral circuit.
Is there a signal in at pin 57,
100, 110 of IC4001 and at pin
2 of IC4010 ?
No
TROUBLESHOOTING GUIDE
E-37
No
Check VCR block.
Yes
Check DVD DECK .
AUDIO CAN NOT
RECORD TO DVD
Is there a signal in at pin 1~15
of CP7301 with each input?
Yes
Check IC4001
and peripheral circuit.
Is there a signal in at pin
1~40 of CP4001 ?
No
Yes
Check IC4009
and peripheral circuit.
Is there a signal in at pin 57,
100, 110 of IC4001 and at pin
2 of IC4010 ?
No
