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LG LMC1575SB - User Manual

LG LMC1575SB
55 pages
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Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication, modification, copying or transmission of
this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this
Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LMC1575BD
LMC1575ST
LMC1575SW
LMC1575SB
P/NO.: MFL69902602
MODEL:
MICROWAVE OVEN
SERVICE MANUAL
February, 2017
Printed in Korea
Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes

Questions and Answers

  • J
    Jeffrey RiosAug 9, 2025
    Why my LG LMC1575SB does not work?
    • A
      Anita MartinezAug 9, 2025
      If your LG Microwave Oven isn't working, first, avoid using other electrical appliances simultaneously to prevent blown fuses or breakers. Ensure the microwave plug is securely inserted into the outlet. Also, verify that the AC input voltage is adequate for the microwave's operation.
  • V
    Veronica KeithAug 20, 2025
    What to do if my LG LMC1575SB Microwave Oven sparks?
    • A
      Anthony RossAug 20, 2025
      If sparks occur inside your LG Microwave Oven, avoid using metallic ware or cookware with metallic trimming. Do not allow any metallic ware to touch the oven wall. Use only microwave-safe cookware as specified in the cooking guide.
  • M
    Mark MartinezAug 29, 2025
    How to fix uneven cooking in LG LMC1575SB Microwave Oven?
    • S
      shannonannaAug 29, 2025
      Uneven cooking in your LG Microwave Oven might occur due to the microwave's inherent intensity variations. Try using plastic wrap or a lid during cooking. For liquids like soup, cocoa, or milk, stir the contents once or twice during the cooking process.

Summary

Safety Precautions for Microwave Ovens

Microwave Energy Exposure Precautions

Safety measures to prevent microwave energy exposure during servicing.

Microwave Radiation Warning

Critical warning regarding exposure to microwave radiation.

Cautions and Warnings During Servicing

Inverter Power Supply Dangers

Hazards associated with the inverter power supply unit.

Installation Guide

Electrical Schematics and Circuitry

Service Information and Procedures

Microwave Leakage Testing Procedures

Methods for testing and measuring microwave radiation leakage.

Microwave Power Output Measurement

Procedure for measuring the oven's microwave power output.

Troubleshooting Guide

General Troubleshooting Cautions

Important safety and preliminary checks before troubleshooting.

Troubleshooting Oven Non-Operation and Fuse Issues

Troubleshooting steps for a non-operational oven and blown fuses.

Inverter PCB Troubleshooting

Inverter PCB Component Identification

Identifying key components on the inverter PCB for troubleshooting.

Error Code Reference

Error Code Symptoms and Remedies

Guide to error codes, their symptoms, and recommended solutions.

Symptom Analysis: Dead or No Heating

Troubleshooting Specific Symptoms

Detailed checks for 'Dead' or 'No Heating' symptoms using diagrams.

Inverter Wiring Inspection

Specific PCB Component Testing

Inverter;SMPS PCB (F-11) Testing

Testing procedure for the inverter/SMPS PCB related to F-11 error.

Symptom Analysis: Not Heating (Cool)

Inverter PCB IC Parts Testing

Testing specific IC parts on the inverter PCB for cooling-related issues.

LG LMC1575SB Specifications

General IconGeneral
Stylecountertop
Total Capacity1.5 cubic feet
Sensor Cookingyes
Timeryes
Microwave Power1200 watts
Voltage120 volts
Current14 amperes
Weight and Dimensions IconWeight and Dimensions
Depth17 inches
Height12.1 inches
Width21.4 inches
Net Weight26 pounds

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