LG MB-392AA, Service Manual

K. TIMER MOTOR REMOVAL

1) Remove the control panel assembly from the

cavity. 

2) Remove screws which hold the timer motor to the

control panel.

3) Remove the timer motor from the control panel.
4) Remove the power control knob and the timer

knob.

L. INTERLOCK SYSTEM

1) INTERLOCK MECHANISM

The door lock mechanism is a device which has
been specially designed to eliminate completely
microwave activity when the door is opened during
cooking and thus to prevent the danger resulting
from the microwave leakage.

2) MOUNTING OF THE PRIMARY/MONITOR/

SECONDARY SWITCHES TO THE LATCH
BOARD

3) INSTALLATION AND ADJUSTMENT OF THE

LATCH BOARD TO THE OVEN ASSEMBLY

• Mount the latch board to the oven assembly.
• Adjust the latch board in the arrow direction so that

oven door will not have any play in it when the door
is closed.

• Tighten the mounting screw.
• Check for play in the door by pushing the door

release button. Door movement should be less
than 0.5 mm. (1/64 inch)

Don't push the door release button while making

adjustment. Make sure that the latch moves
smoothly after adjustment are completed and that
the screws are tight. Make sure the primary, monitor,
and secondary switches operate properly by
following the continuity test procedure.

5-6

Control Panel

Timer Motor

Power Control 

Knob

Timer Knob

AC Relay

PRIMARY
SWITCH

ADJUSTMENT
DIRECTION

MONITOR
SWITCH

SECONDARY
SWITCH

CAUTION: CHECK THE CORRECT POSITION

MAGNETRON

H.V. TRANSFORMER

PRIMARY

CIRCUIT PROTECTOR

H.V. CAPACITOR

H.V.
DIODE

FIG. 1