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VC-A582U
VC-A582U(A)
VC-H982U
FLOW CHART NO.12 CAPSTAN MOTOR TROUBLESHOOTING
The capstan motor fails to run.
Is the voltage more than about 2.6V
DC given out of pin(32) of IC701.
Check IC701.
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Is the supply voltage of 5V feed to
pin(8) of MC connector?
Check PC 5V line.
Is the voltage more than 2.6V DC
sent in pin(4) of MC connector?
Check between the MC connector
and all the way up thru to pin(32)
of IC701.
Is the voltage at pin(3) of MC
connector 1.6~2.7V?
Check between the pin(60) of IC701
and all the way up thru to pin(3) of
MC connector.
Is the supply voltage of 12V feed to
pin(5) of MC connector?
Check AT 12V line and motor voltage
selector circuit. (Q955~Q958).
Replace capstan motor.
FLOW CHART NO.14 DRUM MOTOR TROUBLESHOOTING(2)
The drum motor runs only for a few seconds.
Is drum PG signal given out of pin
(5) of ME connector?
Check drum motor.
Check between pin(5) of ME
connector and all the way up thru to
pin (66) of IC701.
Is drum PG signal given out of pin
(66) of IC701?
Is drum PG M.M.signal given to pin
(81) of IC701?
Check IC701. Readjust R724.
(HEAD SW POINT control)
Is H.SW. pulse given out of pin(23)
of IC701?
Check IC701.
Replace IC701.
YES
YES
YES
YES
NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
NO
NO
FLOW CHART NO.15 HEAD SWITCHING PULSE TROUBLESHOOTING.
No head switching pulse.
See FLOW CHART NO.13,14.
(DRUM MOTOR
TROUBLESHOOTING(1),(2))
Is the drum motor rotating?
Is the drum PG signal and drum FG
signal present on pins(66) and (65)
of IC701, respectively?
Are there drum PG M.M.signal at pin
(81) of IC701?
Check C723 and readjust R724.
(HEAD SW. POINT control.)
Could be lines between AD plug
and IC701.
Check drum motor and the between
AD to ME harness.
Are the drum PG and drum FG
signals present on pins(3) and (5) of
AD connector?
Replace IC701.
FLOW CHART NO.13 DRUM MOTOR TROUBLESHOOTING(1)
The drum motor fails to run.
Is the voltage more than about 2.6V
DC given out of pin(31) of IC701.
Check IC701.
NO
NO
NO
YES
YES
Check between pin(31) of IC701
and all the way up to pin(1) of ME
connector.
Is the voltage more than about 2.6V
applied at pin(1) of ME connector?
Is the supply voltage of 12V feed to
pin(4) of ME connector?
Replace drum motor.
Check AT 12V line.
Summary of Contents for VC-A582U
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