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LG MC-8083CL User Manual

LG MC-8083CL
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MICROWAVE OVEN
SERVICE MANUAL
MODEL: MC-8083CL
CAUTION
BEFORE SERVICING THE UNIT,READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website http://biz.lgservice.com
P/NO : 3828W5S3948
August., 2004
Printed in Korea

Questions and Answers:

LG MC-8083CL Specifications

General IconGeneral
Power Output800 W
TurntableYes
ColorSilver
Cooking Levels5
Child LockYes

Summary

Safety Precautions

Specifications

Cautions

Microwave Radiation

Precautions regarding exposure to microwave energy during servicing.

Installations

Installing

Instructions for setting up the microwave oven in its intended location.

Earthing Instructions

Guidelines for correctly grounding the microwave oven for safety.

Operating Instructions

Features

Overview of the microwave oven's external components and their functions.

Control Panel

Description and function of each button and display element on the control panel.

Operating Sequence

Setting the Clock

Step-by-step guide to setting the oven's internal clock.

Microwave Cooking

Procedure for operating the oven using microwave cooking mode.

Grill Cooking

Procedure for operating the oven using grill cooking mode.

Schematic Diagram

Circuit Description

General Details

Basic overview of the oven's electrical system and power supply.

When Touching the Start Pad

Explanation of the circuit operation when the start button is pressed.

When the Door is Opened During Cooking

Circuit behavior when the oven door is opened while in operation.

Service Information

Tools and Measuring Instruments

List of necessary tools and equipment for servicing the microwave oven.

Microwave Leakage Test

Procedures and precautions for testing microwave radiation leakage.

Measurement With Outer Case Removed

Record Keeping and Notification After Measurement

Measurement of Microwave Power Output

Disassembly and Adjustment

Outer Case Removal

Step-by-step guide to removing the external casing of the microwave oven.

Power Supply Cord Removal

Instructions for safely disconnecting and removing the power cord.

Door Gross Assembly Removal

High Voltage Transformer Removal

Air Duct Assembly Removal

Magnetron Removal

Fan Motor Assembly Removal

High Voltage Capacitor and Diode Removal

Turntable Motor Removal

C-Motor, Thermistor and Sheath Heater Removal

PCB Assembly Removal

Interlock System

Interlock Continuity Test

Primary Interlock Switch Test

Procedure to test the continuity of the primary interlock switch.

Secondary Interlock Switch Test

Procedure to test the continuity of the secondary interlock switch.

Monitor Switch Test

Procedure to test the continuity of the monitor switch.

Component Test Procedure

High Voltage Transformer

Test procedure for measuring resistance of the high voltage transformer windings.

Magnetron

Test procedure for measuring resistance of the magnetron filament and chassis.

High Voltage Capacitor Test

High Voltage Diode Test

Fuse Test

Heater Element Test

Magnetron Thermostat Test

PCB Connector Test

Relay Tests (PCB)

Fan Motor Test

Turntable Motor Test

Circulation Motor Test

Trouble Shooting Summary

Microwave Oven Does Not Work

Troubleshooting steps for when the microwave oven fails to operate.

Output Power Is Too Low

Troubleshooting steps for when the microwave oven's output power is insufficient.

Sparks Occurring

Troubleshooting steps when sparks are observed inside the microwave oven.

Control Circuit Troubleshooting

Display Segment Issues

Issues with display segments indicating a probable defective control circuit.

Display Function Errors

Display errors when keypad inputs do not match the touched buttons or colon is not active.

Oven Operation Troubleshooting

Fuse Blows

Troubleshooting steps when the main fuse repeatedly blows.

Fuse Intact, Oven Inoperative

Troubleshooting steps when the fuse is intact but the oven does not operate.

Programming and Heat Troubleshooting

Oven Does Not Start Cooking

Issues where the oven does not initiate cooking after program setup.

Low Heat Output

Problems with low heat output during oven operation.

Microwave Oscillation Troubleshooting

No Microwave Oscillation

Diagnosis for no microwave oscillation when display and fan operate.

Power Level and Grill Troubleshooting

Incorrect Power Level Operation

Issues when the oven operates at full power regardless of the set lower power level.

Grill Heater Failure

Troubleshooting steps when the grill heater fails to operate.

Exploded View Sections

Door Parts

Exploded diagram showing all components of the microwave oven door assembly.

Control Panel Parts

Exploded diagram showing all components of the control panel assembly.

Oven Cavity Parts

Exploded diagram showing all components of the main oven cavity.

Interior Parts

Exploded diagram showing internal components of the microwave oven.

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