LG RCT689H Service Manual page 113

MECHANISM TROUBLESHOOTING GUIDE
E.
In PB mode Tape
Presence not sensed.
Is the Pinch Roller attached to
the Capstan Motor Shaft?
YES
Does the T/Up Reel turn?
YES
Does the Capstan Motor turn?
YES
Does the Drum Motor turn?
YES
Are there DPG, DFG Pulses?
YES
Are the T/Up Supply Reel
Sensors ok?
YES
Check Servo, Syscon.
NO
Check Alignment positions
(page 4-14)
NO
Is the Belt ok?
YES
Check the clutch and the Idler
Assembly.
NO
Is the Voltage supplied to the
Capstan Motor Vcc1,Vcc2 each?
YES
Is the terminal voltage of
Capstan Motor supplied more
than 4V?
YES
Replace the Capstan Motor.
NO
Is the Vcc voltage of the Drum
Motor normal?
YES
Is the terminal voltage of the
Drum Motor more than 2.3V?
YES
Replace the Drum Motor.
4-26
NO
Replace the Belt.
NO
Check Servo, Power.
NO
Check Syscon, Circuit.
NO
Check Syscon, Circuit.