I. HIGH VOLTAGE TRANSFORMER REMOVAL

1)Discharge the high voltage capacitor.

2)Disconnect the lead wire from magnetron, high voltage transformer, and capacitor.

3)Remove the screw holding the high voltage transformer to the baseplate.

J. FAN MOTOR ASSEMBLY REMOVAL

1)Discharge the high voltage capacitor.

2)Disconnect the lead wire from fan motor and high voltage capacitor.

3)Remove the two screws holding the the suction guide ASS’Y to the oven cavity and remove the high voltage diode earth screw.

4)Remove the two screws holding the fan motor ASS’Y to the suction guide ASS’Y.

K. HIGH VOLTAGE CAPACITOR AND DIODE REMOVAL

1)Discharge the high voltage capacitor.

2)Disconnect the lead wire from fan motor and high voltage capacitor.

3)Remove the screw holding the suction guide ASS’Y to the oven cavity and remove the high voltage diode earth screw.

4)Remove the screw holding the high voltage capacitor bracket.

 

Fan Motor

 

ASS’Y

 

Suction

 

Guide

H.V.

 

Transformer

H.V.

 

 

Capacitor

 

H.V.

 

Diode

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.

ADJUSTMENT

DIRECTION

SECONDARY

SWITCH

MONITOR

SWITCH

PRIMARY

SWITCH

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

Copyright © 2007 LG Electronics. Inc. All right reserved.

5-6

LGE Internal Use Only

Only for training and service purposes

 

 

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LG Electronics MS3447GRS service manual High Voltage Transformer Removal, FAN Motor Assembly Removal, Interlock System

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