LG LH-CX640 Series Service Manual page 128

MECHANISM
TROUBLESHOOTING
GUIDE
4-26
No
cassette
insert
is
done.
Does
the
lever
assembly
switch
operate?
Is the
lever
assembly
switch
spring
normal?
Does
the
CST
IN
switch
operate
normally?
Add or
replace the lever
assembly
switches
spring.
Is
the
Vcc of the
main
P.C.B
assembly?
YES
YES
Check the
Syscon
circuit.
YES
Check
the power
circuit.
NO
Is
voltage
between
the
cassette
switch
terminal
and the GND on
the
main
P.C.B
assembly?
YES
Is
there
short
between
the
cassette
switch
terminal
and
the
GND
on the
main
P.C.B
assembly?
Replace
the
main
P.C.B
assem-
bly
or
remove the
short
part.
NO
Check
the
mode
switch
position
and
the
Syscon
circuit.
Replace
the
CST
IN
switch.
YES
NO
YES
NO
NO
Replace
the
F/L
switch.
NO
NO
No
cassette
eject is
done.
Does
the
L/D
motor
turn
in
reverse?
Check
the
L/D
motor
and
the
drive
IC.
Replace
the
lever
assembly
switch.
Does the
lever
assembly
switch
operate?
YES
NO
NO
Does
the
arm
assembly
F/G
operate?
YES
NO
Does
the
opener
door
operate?
YES
Replace the
arm
assembly
F/L
Replace
the
opener
door.
2.
Front
Loading
Mechanism
A.
B.