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LG GR-391SCA User Manual

LG GR-391SCA
38 pages
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CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY
PRECAUTIONS" IN THIS MANUAL.
MODEL: GR-391SCA
REFRIGERATOR
SERVICE MANUAL
Ref. No.
GR-432SCA
GR-431SCA
GR-482SCA
COLOR: SUPER WHITE
http://biz.lgservice.com
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LG GR-391SCA Specifications

General IconGeneral
ColorSilver
Ice MakerNo
Water DispenserNo
TypeTop Freezer
Shelves MaterialGlass

Summary

Safety and Servicing Precautions

Servicing Precautions

Guidelines for safe and effective servicing of the refrigerator unit.

Specifications

Technical specifications and parameters for the refrigerator models.

Parts Identification

Visual identification and labeling of refrigerator components.

Disassembly Procedures

Step-by-step instructions for disassembling refrigerator parts.

Refrigerator Door Disassembly

Procedure for removing and disassembling the refrigerator door.

Door Switch Removal

Steps to remove and disconnect the door switch.

Thermistor Access

Guidance on accessing and removing the thermistor component.

Fan and Fan Motor Removal

Instructions for removing the fan and its motor assembly.

Defrost Control Assembly Removal

Procedure for removing the defrost control assembly.

Lamp Replacement

Steps to remove and replace the internal lamps.

Control Box-R Removal

How to access and remove the control box.

Replacement of Door Opening Type

Instructions for changing the door opening direction.

Adjustment Procedures

Procedures for adjusting refrigerator components.

Compressor Adjustment and Notes

Details on compressor operation, composition, and usage notes.

PTC Starter Details

Explanation of PTC starter composition, role, and usage.

Circuit Diagram

Schematic representation of the refrigerator's electrical circuit.

Troubleshooting Guide

Guide to diagnosing and resolving refrigerator issues.

Compressor and Electric Component Troubleshooting

Troubleshooting steps for compressor and related electric parts.

PTC and OLP Troubleshooting

Diagnosing issues related to PTC starter and Over Load Protector.

Other Electric Component Troubleshooting

Troubleshooting other electrical components in the refrigerator.

Service Diagnosis Chart

A chart for diagnosing common refrigerator complaints and remedies.

Refrigerating Cycle Troubleshooting

Troubleshooting and information regarding the refrigeration system.

Description of Function & Circuit of MICOM

Explanation of the MICOM's functions and circuit details.

Refrigerator Function Overview

Description of the refrigerator's basic functions and controls.

Defrosting Cycle Details

Details on the automatic defrosting cycle and its operation.

Sequential Electric Component Operation

Explains the sequential start-up of electric components to prevent damage.

Refrigerator Fan Control

How the refrigerator compartment cooling fan operates.

Error Diagnostic Modes

Information on error codes and diagnostic modes for faults.

PCB Functionality Overview

Detailed breakdown of the Printed Circuit Board (PCB) functions.

Power Circuit Diagram

Diagram and explanation of the power supply circuit.

Oscillation Circuit

Description of the oscillation circuit for clock generation.

Reset Circuit Function

Function of the reset circuit for initializing the system.

Load Drive Circuit

Circuitry for driving various loads like fans and compressors.

Temperature Sensor Circuit

Details of the temperature sensor circuits and their readings.

Door Open Detection Circuits

How the door open/close status is detected.

Temperature Compensation Circuits

Compensation circuits for temperature control.

Key Button and Display Circuit

Circuitry for user interface buttons and indicator lights.

Sensor Resistance Specifications

Table of resistance values for temperature sensors at different temperatures.

7-4 Troubleshooting

Comprehensive troubleshooting guide for various refrigerator issues.

Power Source Issues

Diagnosing issues related to the power source.

Poor Cooling Troubleshooting

Troubleshooting steps when the refrigerator has no or poor cooling.

Defrosting Issues

Diagnosing and resolving defrosting problems.

Main PWB Assembly and Parts List

Assembly diagram and parts list for the main PCB.

Main PWB Assembly Layout

Schematic layout of the main Printed Circuit Board components.

Replacement Parts List

List of replaceable parts with part numbers and specifications.

Main PWB Circuit Diagram

Detailed circuit diagrams for the main PWB.

Exploded View of Refrigerator Parts

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