LG Electronics LMV1825SBQ, MV1825SW service manual Table of Contents

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FOREWORD

Read this Manual carefully. Failure to adhere to or observe the information in this Manual may result in exposing yourself to the Microwave Energy normally contained within the oven cavity.

TABLE OF CONTENTS
	(Page)
SAFETY PRECAUTIONS	Inside front page
SPECIFICATIONS	1-1
CAUTIONS	2-1
INSTALLATION	3-1
OPERATING INSTRUCTIONS	4-1
CONTROL PANEL	4-1
CONTROL PANEL INSTRUCTIONS	4-2
OVERALL CIRCUIT DIAGRAM	5-1
SCHEMATIC DIAGRAM	5-1
MATRIX CIRCUIT FOR TOUCH KEY BOARD	5-2
GENERAL INFORMATION FOR SERVICE	6-1
GENERAL PRECAUTIONS IN USE	6-1
TRIAL OPERATION	6-1
FEATURES AND SPECIFICATIONS FEATURES	6-1
SERVICE INFORMATION	7-1
PRECAUTIONS AND REPAIR SERVICE TIPS	7-1
MICROWAVE LEAKAGE TEST	7-2
POWER OUTPUT MEASUREMENT	7-3
DISASSEMBLY INSTRUCTIONS	7-4
INTERLOCK SYSTEM	7-12
INTERLOCK CONTINUITY TEST	7-14
TEST AND CHECKOUT PROCEDURES AND TROUBLE SHOOTING	7-15
A. TEST PROCEDURES	7-15
B. CHECKOUT PROCEDURES	7-18
C. TROUBLE SHOOTING	7-21
EXPLODED VIEW	8-1
REPLACEMENT PARTS LIST	8-8
SCHEMATIC DIAGRAM OF PCB	8-14
PRINTED CIRCUIT BOARD	8-15
PCB PARTS LIST	8-16

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Contents Microwave Oven Safety Precautions in this ManualPage Table of Contents Specifications Microwave Radiation Grounding Instructions InstallationControl Panel Operating InstructionsControl Panel Instructions Schematic Diagram Overall Circuit DiagramMatrix Circuit for Touch KEY Board General Precautions in USE Features and Specifications FeaturesTrial Operation Preliminary Precautions and Repair Service TipsEquipment Microwave Leakage TestMeasurement with the Outer Case Removed Power Output MeasurementImportant Notes Disassembly InstructionsHOW to Insert the F.P.C. Connector HOW to Remove the F.P.C. ConnectorRemoving the OUT CASEFigure Removing the Door Interlock Switches Figures 9,10 Removing Magnetron Removing Door Figure Removing Stirrer FANAssembling Door Removing the Ventilation MotorReplacing the Humidity Sensor Removing the Turntable Motor Interlock Mechanism Interlock SystemTest the Latch and Switch Sequence Interlock Continuity Test Components Test Procedure ResultsTest Procedures Test and Checkout PROCEDURES, and Trouble ShootingHIGH-VOLTAGE Diode FPC Connector Power Level Checkout ProceduresCheckout Procedures for Relay Problem a Checkout Procedures for Circuit Board Trouble Shooting Circuit board Poor Check the contact of relay 2see Normal Operation Circuit board Fuse Exploded View Control Panel Oven Cavity Latch Board Interior 50FZZA Installation Schematic Diagram of P.C.B Printed Circuit Board May