LG V9120W Service Manual page 103

MECHANISM TROUBLESHOOTING GUIDE
2. Front Loading Mechanism
A.
No cassette insert is done.
Does the lever assembly
switch operate?
YES
Is the Vcc of the main P.C.B
assembly?
NO
YES
Is voltage between the cassette
switch terminal and the GND on
the main P.C.B assembly?
NO
YES
Check the mode switch position
and the Syscon circuit.
B.
No cassette eject is done.
Does the L/D motor turn in reverse?
YES
Does the lever assembly switch operate?
YES
Does the arm assembly F/G operate?
YES
Does the opener door operate?
NO
Is the lever assembly switch
spring normal?
YES
Does the CST IN switch
operate normally?
YES
Check the Syscon circuit.
Check the power circuit.
Is there short between the cassette switch terminal
and the GND on the main P.C.B assembly?
YES
Replace the main P.C.B assem-
bly or remove the short part.
NO
NO
NO
NO
NO
NO
NO
Check the L/D motor and the drive IC.
Replace the lever assembly switch.
Replace the arm assembly F/L
Replace the opener door.
Add or replace the lever
assembly switches spring.
Replace the F/L switch.
Replace the CST IN switch.
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