Manuals / LG Electronics / Kitchen Appliance / Microwave Oven

LG Electronics MS3447GR service manual Website http//biz.lgservice.com, July, P/NO MFL31039007

Models: MS3447GR MS3447GRS

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Internal Use Only

Website http://biz.lgservice.com

MICROWAVE OVEN

SERVICE MANUAL

MODEL: MS3447GR

MS3447GRS

CAUTION

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

	July, 2007
P/NO : MFL31039007	Printed in Korea

Page 1

Image 1

LG Electronics MS3447GRS service manual Website http//biz.lgservice.com, July, P/NO MFL31039007, Microwave Oven

Contents

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL Website http//biz.lgservice.comJuly P/NO MFL31039007MICROWAVE RADIATION SAFETY PRECAUTIONSOnly for training and service purposes CONTENTSSERVICE INFORMATION LGE Internal Use OnlyDESCRIPTION SPECIFICATIONSMODEL MS3447GR / MS3447GRSNEVER operate the oven with no load CAUTIONSNEVER injure the door seal and front plate of the oven cavity NEVER put iron tools on the magnetronINSTALLING INSTALLATIONEARTHING INSTRUCTIONS 10cmOPERATING INSTRUCTIONS FEATURESCONTROL PANEL 1. SENSOR REHEAT 2. SENSOR COOKOPERATING SEQUENCE 1. CANCEL FUNCTION2. AUTO TOUCH 6. CHILD LOCKOnly for training and service purposes SCHEMATIC DIAGRAMLGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reservedWHEN TOUCHING THE START PAD WHEN SELECTING COOKING POWER LEVEL AND TIMEWHEN THE OVEN IS SET AT ANY LEVEL EXCEPT MAXIMUM WHEN THE DOOR IS OPENED DURING COOKINGIf the oven operates with the door open, the service personnel should SERVICE INFORMATIONTOOLS AND MEASURING INSTRUMENTS MICROWAVE LEAKAGE TESTMEASUREMENT WITH OUTER CASE REMOVED NOTES WHEN MEASURINGMEASUREMENT WITH A FULLY ASSEMBLED OVEN WARNING AVOID CONTACTING ANY HIGH VOLTAGE PARTSDISASSEMBLY AND ADJUSTMENT MEASUREMENT OF MICROWAVE POWER OUTPUTB. POWER SUPPLY CORD C. CONTROL PANEL ASSEMBLYE. DOOR MAIN ASSEMBLY REMOVAL D. PCB ASSEMBLY REMOVALCAUTION Be careful not to damage door seal plate by screwdriver G. MAGNETRON REMOVAL F. AIR DUCT ASSEMBLY REMOVALH. REMOVING THE TURNTABLE MOTOR I. HIGH VOLTAGE TRANSFORMER REMOVAL J. FAN MOTOR ASSEMBLY REMOVALK. HIGH VOLTAGE CAPACITOR AND DIODE REMOVAL L. INTERLOCK SYSTEMB. SECONDARY INTERLOCK SWITCH TEST A. PRIMARY INTERLOCK SWITCH TESTC. MONITOR SWITCH TEST TEST PROCEDURETEST PROCEDURE COMPONENT TEST PROCEDURECAUTIONS COMPONENTSCOMPONENTS TEST PROCEDURERESULTS Relay 5-10TEST PROCEDURE COMPONENTSCONDITION TROUBLE SHOOTINGCAUSE REMEDYRESULT CHECK5-12 CONDITION5-13 RESULTCONDITION CHECKCHECK CONDITIONCAUSE REMEDY5-15 NOTE Make sure the wire leads correct positionCONDITION CHECKINTRODUCTION EXPLODED VIEWOVEN CAVITY PARTS INTERIOR PARTS15006A 13581A 13552A 13536A 13213A 14890A 13720D 14026A 14970A DOOR PARTS24781M 23572A 23790D 268711 WTP018 23506A 24510L 24970A CONTROL PANEL PARTS33112U OVEN CAVITY PARTS33052A WTT010 33390G 36549S WTP013WSZ085 466001 43501A 43500A LARCH BOARD PARTSWTT021 WTP004 56501A 54974T INTERIOR PARTS56901A 56549F56170D 63302A 63303A 948502 65006B WSZ002 WTT021 BASE PLATE PARTS

Website http://biz.lgservice.com

MICROWAVE OVEN

SERVICE MANUAL

MODEL: MS3447GR

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

July, 2007

P/NO : MFL31039007

Printed in Korea