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LG MS-2642DP - User Manual

LG MS-2642DP
35 pages
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MICROWAVE OVEN
SERVICE MANUAL
MODEL : MS-2642DP
CAUTION
BEFORE SERVICING THE UNIT, READ THESAFETY PRECAUTIONS IN THIS MANUAL.
website: http://biz.lgservice.com

Questions and Answers

  • S
    Sharon RobertsAug 14, 2025
    What to do if setting time does not count down on LG Microwave Oven?
    • S
      Steve JonesAug 14, 2025
      If the setting time doesn't count down when you touch the START pad on your LG Microwave Oven, it could be due to a defective secondary switch, a defective PCB assembly, or a loose connection. Replace the secondary switch or PCB assembly, or connect them tightly.
  • K
    Kaylee HernandezAug 17, 2025
    Why is my LG Microwave Oven not heating properly?
    • D
      Danielle MillerAug 17, 2025
      If your LG Microwave Oven seems to be operating but produces little heat, it might be due to voltage lower than 90% of the output rating, a defective PCB assembly, or a defective magnetron. Replace PCB assembly or magnetron.
  • R
    Robert DukeAug 20, 2025
    Why is my LG Microwave Oven sparking?
    • L
      Larry GrayAug 20, 2025
      If sparks occur in your LG Microwave Oven, avoid using metallic ware for cooking, unless specified in the cooking guide. Also, do not use ceramic ware trimmed with gold or silver powder.
  • A
    Amanda BrewerAug 25, 2025
    Why does the fuse keep blowing in my LG MS-2642DP?
    • J
      Jeffrey MarksAug 25, 2025
      If the fuse blows in your LG Microwave Oven, the monitor switch may be malfunctioning, or there may be a shorted contact at the primary switch, or malfunction of secondary switch, or defective high voltage capacitor, or defective high voltage transformer. Replace the fuse, monitor switch, primary, monitor, secondary switches and RELAY(RY2) of P.C.B Assembly, high voltage capacitor or high voltage transformer.
  • P
    paul68Aug 27, 2025
    Why is the output power too low on my LG MS-2642DP?
    • C
      christineclarkAug 27, 2025
      If the output power of your LG Microwave Oven is too low, it could be due to low AC input voltage. Use the microwave oven at adequate line voltage. It is also possible that the food should be cooked for a longer time period.
  • A
    aliciavegaAug 30, 2025
    What causes no microwave oscillation in LG MS-2642DP?
    • K
      Kimberly JeffersonAug 30, 2025
      If there's no microwave oscillation even though the oven lamp and fan motor run in your LG Microwave Oven, it could be due to a defective PCB assembly, magnetron, high voltage transformer, high voltage capacitor, or high voltage diode. Replace the PCB assembly, magnetron, high voltage transformer, high voltage capacitor, or high voltage diode.
  • M
    Mr. John SmithSep 3, 2025
    Why does the LG Microwave Oven display the wrong number?
    • J
      josephcruzSep 3, 2025
      If the display of your LG Microwave Oven shows a number or figure different from the one touched, the PCB assembly may be defective. Replace the PCB assembly.
  • J
    Joseph BrownSep 6, 2025
    How to fix LG MS-2642DP fan motor or oven lamp not working?
    • M
      msweeneySep 6, 2025
      If the fan motor or oven lamp in your LG Microwave Oven doesn't turn on, it could be a defective fan motor or a defective oven lamp. Replace the fan motor or the oven lamp.
  • A
    Andrew RodriguezSep 9, 2025
    Why does my LG MS-2642DP Microwave Oven blow a fuse when I plug in other appliances?
    • H
      haasangelaSep 9, 2025
      To prevent a blown fuse or breaker in your LG Microwave Oven, avoid using other electrical appliances simultaneously when using the microwave oven.

Summary

Safety Precautions

Microwave Energy Safety

Precautions to avoid excessive microwave energy exposure during servicing and operation.

Specifications

Cautions

High Voltage and Radiation Hazards

Warnings about high voltage and microwave radiation risks during servicing.

Installations

Installation Guidelines

Instructions for proper placement and setup of the microwave oven.

Grounding Instructions

Essential safety procedures for grounding the appliance.

Operating Instructions

Features Overview

Description of the microwave oven's various functions and components.

Control Panel Layout

Identification and function of buttons and display elements on the control panel.

Operating Sequences

Schematic Diagram

Circuit Description

Service Information

Tools and Measuring Instruments

List of necessary tools and instruments for microwave oven servicing.

Microwave Leakage Testing

Methods for measuring and verifying microwave radiation leakage levels.

Leakage Measurement Procedures

Disassembly and Adjustment Procedures

Microwave Power Output Measurement

Method for testing the oven's microwave power output using a water load.

Component Removal: Case, Cord, Panel, PCB

Steps for removing outer case, power cord, control panel, and PCB assemblies.

Door Assembly Removal

Procedure for removing the main door assembly from the oven.

Magnetron and Turntable Motor Removal

Steps for removing the magnetron and turntable motor components.

HV Components, Fan Motor, and Interlock System

Procedures for removing HV transformer, capacitor, diode, fan motor, and description of interlock system.

Interlock System Continuity Testing

Testing the continuity of the primary, secondary, and monitor interlock switches.

Component Testing Procedures

High Voltage Transformer and Magnetron Testing

Resistance testing procedures for the high voltage transformer and magnetron.

Capacitor and Diode Testing

Resistance and continuity testing for high voltage capacitors and diodes.

Relay, Fan Motor, and Turntable Motor Testing

Testing procedures for relay, fan motor, and turntable motor resistance.

Troubleshooting Guide

Display and Control Circuit Troubleshooting

Diagnosing and resolving problems related to the oven's display and control inputs.

Power and Operation Troubleshooting

Diagnosing and resolving issues with the oven not operating or blowing fuses.

Cooking Performance Troubleshooting

Diagnosing and resolving problems related to cooking time, heat output, fan, and lamp operation.

No Microwave Oscillation Troubleshooting

Diagnosing and resolving issues when the oven lacks microwave oscillation.

Exploded View and Parts Identification

Door, Control Panel, and Latch Board Parts

Visual identification of parts for door, control panel, and latch board assemblies.

Oven Cavity, Interior, and Base Plate Parts

Visual identification of parts for oven cavity, interior, and base plate.

Door Parts Identification

Controller Parts Identification

Oven Cavity Parts Identification

Latch Board Parts Identification

Interior Parts Identification

Base Plate Parts Identification

Schematic Diagram of PCB

Printed Circuit Board Layout

LG MS-2642DP Specifications

General IconGeneral
Capacity26 l
ColorBlack
Cooking Levels5
DisplayLED
Turntable Diameter32 cm

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