Manuals / LG Electronics / Kitchen Appliance / Microwave Oven

LG Electronics LMV1625B, LMV1625W PROBLEM - D No buzzing when touching the key, between

Models: LMV1625W LMV1625B

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PROBLEM - D : No buzzing when touching the key, between

PROBLEM - D : No buzzing when touching the key, between

stages or at end of cooking

1

										Runs


Check normal					Replace			Normal
Check normal					Replace			Normal
	operation			circuit board				circuit board
circuit board

7-23

Image 34

LG Electronics LMV1625B, LMV1625W service manual PROBLEM - D No buzzing when touching the key, between

Contents

MICROWAVE OVEN SERVICE MANUALSAFETY PRECAUTIONS IN THIS MANUAL MODEL LMV1625B LMV1625WDURING SERVICING TO AVOID POSSIBLE EXPOSURE SAFETY PRECAUTIONS PRECAUTIONS TO BE OBSERVED BEFORE ANDTO EXCESSIVE MICROWAVE ENERGY FOREWORD TABLE OF CONTENTSSPECIFICATIONS 1,500W maximum Microwave oven+Cook top lamp+Ventilation fanMAGNETRON CAUTIONSMICROWAVE RADIATION GasketPRECAUTIONS ON INSTALLATION INSTALLATIONSGROUNDING INSTRUCTIONS OPERATING INSTRUCTIONS CONTROL PANELCONTROL PANEL INSTRUCTIONS OVERALL CIRCUIT DIAGRAM SCHEMATIC DIAGRAMMATRIX CIRCUIT FOR TOUCH KEY BOARD FEATURES AND SPECIFICATIONS FEATURES GENERAL INFORMATION FOR SERVICEGENERAL PRECAUTIONS IN USE TRIAL OPERATIONSERVICE INFORMATION PRECAUTIONS AND REPAIR SERVICE TIPSIf the oven operates with the door open, the service personnel should MICROWAVE LEAKAGE TESTEQUIPMENT Tell the user not to operate the ovenMEASUREMENT WITH THE OUTER CASE REMOVED NOTE WHEN MEASURINGPOWER OUTPUT MEASUREMENT MEASUREMENT WITH A FULLY ASSEMBLED OVENA. REMOVING POWER AND CONTROL CIRCUIT BOARD Figures 1, 2 and DISASSEMBLY INSTRUCTIONSIMPORTANT NOTES HOW TO REMOVE THE F.P.C. CONNECTOR HOW TO INSERT THE F.P.C. CONNECTORB. REMOVING THE OUT CASEFigure C REMOVING THE DOOR INTERLOCK SWITCHES Figures 9,10 D. REMOVING MAGNETRON G. DISASSEMBLING DOOR Figure F. REMOVING DOOR FigureCAUTION Be careful not to damage door seal plate with the screwdriver H. ASSEMBLING DOOR I. REMOVING THE VENTILATION FANASSYK. REMOVING THE TURNTABLE MOTOR CHECK THE DOOR LATCH AND SWITCH CLOSING INTERLOCK SYSTEMADJUSTMENT PROCEDURES ADJUST THE LATCH AND SWITCH CLOSINGTEST THE LATCH AND SWITCH SEQUENCE TEST THE MICROWAVE ENERGY LEAKAGEB. SECONDARY INTERLOCK SWITCH TEST INTERLOCK CONTINUITY TESTA. PRIMARY INTERLOCK SWITCH TEST C. MONITOR SWITCH TESTCOMPONENTS TEST AND CHECKOUT PROCEDURES, AND TROUBLE SHOOTINGTEST PROCEDURES RESULTSRESULTS TEST PROCEDURESCOMPONENTS Figure 25-aRESULTS TEST PROCEDURESCOMPONENTS Measure the resistance between terminalwCAUTION The relay connector 2White 1 CHECKOUT PROCEDURES FOR FUSE BLOWINGTEST PROCEDURES These two connectors are not InterDefective RELAY3 Replace RELAY3 PROBLEM B 2 CHECKOUT PROCEDURES FOR RELAY PROBLEM ARemove the mate connector of I/O CON from the circuit board GOOD8 Some of the indicators do no flicker light up 3 CHECKOUT PROCEDURES FOR CIRCUIT BOARDThe following symptoms indicate a defective circuit board 2 The unit with a normal relay continuously operatesRuns PROBLEM - C Unit does not heat up even if display counts down when PROBLEM - D No buzzing when touching the key, between Check 1. POWER SUPPLY DOOR PARTS EXPLODED VIEW13552A 13581A 13536A 13213A 13720D WTT021 14890A 14026A 14970A 13650A 268711 24781M 24810P WTP018 23572A WTT029 CONTROLLER PARTS23506A 34930R 35026G 33052A 33550L 36912C WTT022 35230A OVEN CAVITY PARTS33530A WTT021466001 LATCH BOARD PARTS43500A WSZ084WSZ002 INTERIOR PARTSI33390G 34370T 35889A36549V INTERIOR PARTS56912B 55231C 53550L 56804A44360A WSZ098 WSZ133 INSTALLATION PARTSWSZ203 WSZ204SCHEMATIC DIAGRAMPRINTED CIRCUIT BOARD P/NO. 3828W5S3242 Printed in Korea