Sharp DV-RW250H (serv.man5) Service Manual ▷ View online
TROUBLESHOOTING GUIDE
E-3
Check IC3001.
Check the DECK BLOCK.
YES
YES
NO
NO
AT PLAYBACK AND RECORDING,
CYLINDER MOTOR UNLOAD
Is the voltage at pin 8 of
CP3001 about DC12.6V ?
Check IC502.
In playback, is at pin 12 of
CP3001 about DC2.6V ?
TROUBLESHOOTING GUIDE
E-4
YES
YES
YES
NO
NO
NO
AUDIO SHAKES
Is AUDIO HEAD
scratched?
Change AUDIO HEAD.
At playback, is input about
4.5Vp-p of a rectangular
wave at pin 9 of IC3001 ?
Change CAPSTAN DD UNIT.
Check IC3001.
At playback, is pin 32 of
CP3001 3.5V ?
Check AUDIO BLOCK.
TROUBLESHOOTING GUIDE
E-5
Check LED of DECK,
PHOTO SENSOR.
Change
LOADING MOTOR.
The CASSETTE TAPE
CAN NOT BE INSERTED
Check WORM GEAR
of cassette loading block.
YES
YES
YES
NO
NO
NO
Does WORM GEAR of
cassette loading block
move?
When a CASSETTE can
not inserted, is pin 25 of
IC3001 5V ?
When a CASSETTE is
inserted, is pin 8 of
CP3001 12.6V ?
Check circuit of POWER BLOCK.
TROUBLESHOOTING GUIDE
E-6
Check IC3001.
Does another CASSETTE
insert?
Check SW3001.
Defective CASSETTE
or cassette loading block.
YES
YES
YES
NO
NO
NO
Does SW3001 and
REC LEVER
correctly set ?
After inserting
CASSETTE, is pin 35
of IC3001 0V ?
Correctly SW3001
and REC LEVER set.
WHEN INSERTING A CASSETTE,
IT EJECTS IMMEDIATELY
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