LG KE-20P32X Service Manual page 55

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?
YES
Check the 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 the syscon circuit.
4-23
NO
Is the Vcc. voltage of End
sensor 5V?
YES
Replace the End sensor.
NO
Replace the IR LED.
NO
Is the mode SW assembled
correctly? (refer to page 4-14.)
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.
NO
Check the syscon power.
NO
Check the servo, power
circuits.