Mechanism Troubleshooting Guide; Deck Mechanism - Aiwa HV-MC90 Service Manual

MECHANISM TROUBLESHOOTING GUIDE

1.Deck Mechanism

A.
Auto REW doesn't work.
YES
Is the output of END sensor
of supply side "H"?
"H": more than 3.5V
"L": less than 0.7V~1V
YES
Is the voltage across IR LED
between 0.8~1.5V?
NO
Check syscon circuit.
B.
No F/R modes.
YES
Is the present mode,
F/R Mode?
YES
Does the Capstan Motor rotate?
YES
Do the T/Up, Supply Reel
rotate?
YES
Check syscon circuit.
NO
Is the Vcc. voltage of End
sensor 5V?
YES
Replace End sensor.
NO
Replace LED.
NO
Is the mode SW assembled
correctly (refer to Pages 71) .
NO
Is the normal voltage supplied to
the Capstan Motor Vcc1, Vcc2.?
YES
Does terminal voltage(Vctl) of
Capstan Motor supply side
more than 4V?
YES
Replace the Capstan Motor.
-80-
NO
Check the syscon power.
NO
Check Servo, Power Circuits.