Front Loading Mechanism - LG RCT689H Service Manual

MECHANISM TROUBLESHOOTING GUIDE

2. Front Loading Mechanism

A.
Cassette cannot be
inserted.
Does the Lever Assembly
Switch work?
YES
Is the Vcc of Main P.C.Board
5V?
NO
YES
Is the voltage between cassette
switch and GND on Main
P.C.Board 5V?
NO
YES
Check Mode switch location
and syscon circuit.
B.
Cassette will not eject.
Does the L/D motor rotate in reverse?
YES
Does the Lever Assembly Switch work?
YES
Does the F/L Arm Assembly work normally?
YES
Does the Door Opener work?
NO
Is the Lever Assembly Switch
Spring damaged or omitted?
YES
Does the CST IN Switch work
normally?
YES
Check syscon circuit.
Check power circuit.
Is there a short circuit between cassette
switch and GND on main P.C.Board?
YES
Remove the short circuit part or
Replace the main P.C.Board.
NO
NO
NO
NO
4-27
NO
Replace or add the Lever
Assembly Switch Spring.
NO
NO
Check L/D Motor or Drive IC.
Replace lever Assembly Switch.
Replace F/L Arm Assembly .
Replace the Door Opener.
Replace CST IN Switch.
Replace CST IN Switch.