Sharp VT-3448X, Service Manual

Page: 53 / 144

CAPSTAN MOTOR TROUBLESHOOTING
FLOWCHARTNO.
The capstan motor fails to run.
TAKE-UP REEL PULSE GENERATOR TROUBLESHOOTING
FLOWCHART NO.
No reel sensor pulse appears.
Is at pin of connector AC ?
Check the line.
I
of and all the way up to
YES
I
I
Is the voltage more than about
Is the voltage at pin of connector
Is at pin of connector AC ?
Check the line.
Check/replace the capstan motor.
I
Are there the take
up/supply reel pulses at
pins
and of
connector AM ?
1
NO
HEAD SWITCHING PULSE TROUBLESHOOTING
FLOWCHART NO.
No head switching pulse.
0
A
Is the drum motor
NO
See FLOW CHART NO.
rotating ?
YES
Are the drum and
drum signal inputted
YES
Check pin of
to pins and of
and signal line of head
respectively ?
switching pulse.
NO
Are there the drum
and drum
signals at
YES
Check signal lines
pins and of
all the way up to pins
connector AD ?
and of
NO