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LG LRE3061ST Service Manual

LG LRE3061ST
80 pages
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CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LRE3061ST
LRE3061BD
P/NO : MFL37118352
March 2016
Printed in Korea
MODEL:
30” Freestanding Electric Range
SERVICE MANUAL
Internal Use Only

Table of Contents

Other manuals for LG LRE3061ST

Questions and Answers:

LG LRE3061ST Specifications

General IconGeneral
Stylesingle oven, freestanding
Colorstainless steel
Total Capacity6.3 cubic feet
Inductionno
Number of Oven Racks2
Number of Oven Rack Positions7
Interior Lightyes
Fuelelectric
Weight and Dimensions IconWeight and Dimensions
Depth28 inches
Height47 7/16 inches
Width30 inches
Net Weight167 pounds

Summary

LG Service Manual

Pre-Servicing Caution

Important safety warning before servicing the unit.

Model Identification

Lists the specific models covered by this manual.

FORWARD

Safety Precautions for Technicians

Critical safety guidelines and warnings for technicians.

GENERAL INFORMATION

Important Safety Instructions

Detailed safety precautions for appliance operation and service.

Model & Serial Number Label Locations

Guidance on locating important identification labels.

Appliance Specifications Overview

Technical details and characteristics of the appliance models.

USING YOUR RANGE

General Information and Rating Label

Overview of the appliance's operational features and rating label.

Control Panel Features Overview

Explanation of the buttons and display on the control panel.

COMPONENT ACCESS

Component Locations Diagram

Identifies the physical location of various internal components.

Removing Control and Back Panel Components

Step-by-step guide for disassembling control and back panel components.

COMPONENT ACCESS (Continued)

Removing PCBs and Shielding

Procedures for removing printed circuit boards and shielding.

Removing Cooktop and Door Components

Steps for accessing and removing cooktop elements, glass, door latch, and switch.

Removing Oven Heating Elements and Fan

Steps for removing broil element, convection fan assembly.

Removing Oven Light, Sensor, and Door Gasket

Instructions for removing oven light, sensor, and door gasket.

Removing Oven Door and Side Panel

Steps for removing oven door, handle, inner glass, and side panel.

Specific Component Access Details

Details for convection motor, sensor, heater, door switch, lamp, surface units, warming zone.

COMPOSITION OF CONTROL

Wiring Diagram and Key Matrix

Electrical schematic and key matrix diagram.

Main, Relay, and Display PCBs

Information about the main, relay, and display PCBs.

Key Pad and Control Board Components

Details on the keypad interface and control board composition.

GENERAL FUNCTIONALITY AND TROUBLESHOOTING

Failure Code Summary and Basic Checks

List of error codes and overview of basic troubleshooting checks.

Diagnostic Flow Charts

Diagnostic flowcharts for troubleshooting specific issues.

Trouble Shooting Guide and Schematics

Comprehensive troubleshooting guide and electrical schematics.

Exploded Views Overview

Visual breakdown of appliance parts for identification and replacement.

GENERAL SAFETY INSTRUCTIONS

GENERAL SAFETY INSTRUCTIONS (Continued)

GENERAL SAFETY INSTRUCTIONS (Continued)

GENERAL SAFETY INSTRUCTIONS (Continued)

GENERAL: MODEL & SERIAL NUMBER LOCATIONS

GENERAL: APPLIANCE SPECIFICATIONS

GENERAL: DETAILED SPECIFICATIONS

USING YOUR RANGE: OPERATION

Rating Label and Functional Operation Modes

Information about the rating label and functional operation modes.

USING YOUR RANGE: CONTROL PANEL

Control Panel Button Functions Explained

Detailed explanation of the control panel buttons and functions.

USING YOUR RANGE: OPERATION DETAILS

Surface Units and Warming Zone Operation

Instructions for operating surface units and the warming zone.

Clock, Timer, and Key Pad Operations

Procedures for clock, timer, and key control pad operations.

Oven Light and Setting Pad Usage

How to operate the oven light and use the setting pad for various functions.

USING YOUR RANGE: ADVANCED SETTINGS

Temperature, Language, and Unit Settings

How to adjust oven temperatures and change display language/units.

Alarm, Volume, and Mode Settings

Controls for alarms, volume, and special modes.

Baking, Broiling, Warming, and Lockout

Operation procedures for baking, broiling, warming, and key lockout.

Easy Clean Functionality

Instructions for using the self-cleaning feature.

USING YOUR RANGE: SMART DIAGNOSIS

Smart Diagnosis Procedure Guide

Guide for using the diagnostic feature via phone or app.

COMPONENT ACCESS: LOCATIONS

Control Board and PCB Locations

Location of the main, relay, display, and buzzer PCBs.

Oven and Cooktop Component Locations

Location of surface elements, door switch, oven light, broil heater, convection motor, oven sensor, and hinge hanger.

COMPONENT ACCESS: CONTROLLER ASSEMBLY

Removing Controller Covers and PCBs

Steps to remove controller covers, lamp cover, back cover, and detach PCBs.

Removing Support Assembly and Cooktop PCB

Steps to remove the PCB support assembly and cooktop display PCB.

COMPONENT ACCESS: COOKTOP AND CONTROLLER

Removing Cooktop Plate and Controller Assembly

Steps to remove the cooktop plate assembly and controller assembly.

Separating Control Panel and Key Membrane

Instructions for separating the control panel and keypad membrane.

COMPONENT ACCESS: PCBS

Removing Main and Relay PCBs

Procedures for removing the main and relay PCBs.

COMPONENT ACCESS: COOKTOP

Removing Ceramic Glass Cooktop and Surface Elements

Steps to remove the ceramic glass cooktop and surface heating elements.

COMPONENT ACCESS: DOOR SWITCH

Removing the Oven Door Switch

Steps to remove the oven door switch.

COMPONENT ACCESS: BROIL ELEMENT

Removing the Broil Element

Procedures for removing the oven broil element.

COMPONENT ACCESS: CONVECTION SYSTEM

Removing Convection Heater and Fan Components

Steps to remove convection heater, fan blade, and fan motor.

COMPONENT ACCESS: OVEN LIGHT

Removing Oven Light & Socket Assembly

Steps to remove the oven light and socket assembly.

COMPONENT ACCESS: OVEN SENSOR

Removing Oven Temperature Sensor

Procedures for removing the oven temperature sensor.

COMPONENT ACCESS: OVEN DOOR

Removing and Replacing Lift-off Oven Door

Detailed steps for oven door removal and reinstallation.

COMPONENT ACCESS: OVEN DOOR HANDLE

Removing Oven Door Handle Assembly

Steps for removing the oven door handle assembly.

COMPONENT ACCESS: OVEN DOOR COMPONENTS

Removing Door Handle, Hinge Hanger, and Inner Glass

Steps for removing door handle, hinge hanger, and inner glass.

COMPONENT ACCESS: OVEN DOOR INNER GLASS

Removing Oven Door Inner Glass Assembly

Continued steps for inner glass assembly removal.

COMPONENT ACCESS: OVEN DOOR GASKET

Removing the Oven Door Gasket

Steps to remove and replace the oven door gasket.

COMPONENT ACCESS: SIDE PANEL

Removing Oven Door Gasket and Side Panel

Steps for gasket and side panel removal.

COMPONENT ACCESS: SIDE PANEL (Continued)

Removing the Side Panel

Continued steps for side panel removal.

COMPONENT TEST: GENERAL PROCEDURES

Convection Motor Resistance Test

How to test the convection motor's resistance.

COMPONENT TEST: SENSORS AND HEATERS

Oven Sensor and Convection Heater Resistance Test

How to test oven sensor and convection heater resistance.

Door Switch Continuity Test

How to test the door switch continuity.

COMPONENT TEST: LAMPS AND ELEMENTS

Oven Lamp and Broil Heater Resistance Test

How to test oven lamp and broil heater resistance.

COMPONENT TEST: SURFACE UNITS (LR/RR)

Left/Right Rear Surface Unit Element Test

How to test left/right rear surface unit elements.

COMPONENT TEST: SURFACE UNIT (RF)

Right Front Surface Unit Element Test

How to test the right front surface unit element.

COMPONENT TEST: SURFACE UNITS (LIMITERS)

Left/Right Rear Surface Unit Limiter Test

Testing the limiter terminals for surface units.

COMPONENT TEST: WARMING ZONE

Warming Zone Element and Limiter Test

How to test the warming zone element and its limiter.

COMPOSITION OF CONTROL: WIRING DIAGRAMS

Overall Wiring Diagram

Complete electrical wiring diagram of the appliance.

COMPOSITION OF CONTROL: FUNCTION MAPPING

Wiring Diagram - Function Mapping

Diagram showing how control functions map to wiring terminals.

COMPOSITION OF CONTROL: PCB IDENTIFICATION

Control PCB Identification and Layout

Visual identification of Main, Relay, Display PCBs, Buzzer PCB, and Key Pad.

COMPOSITION OF CONTROL: MAIN PCB DETAILS

Main PCB Connector Details

Close-up view of the main PCB with connector labels.

COMPOSITION OF CONTROL: OVEN RELAY PCB DETAILS

Oven Relay PCB Connector Details

Close-up view of the oven relay PCB with connector labels.

COMPOSITION OF CONTROL: COOKTOP PCB AND KEYPAD

Cook Top Display PCB and Key Pad Layout

Close-up view of the cooktop display PCB and keypad layout.

CHECK THE FAILURE CODE

Displaying and Reading Failure Codes

Step-by-step guide to display and read error codes.

FAILURE CODE ANALYSIS

Appliance Failure Code List and Checks

Table listing error codes, descriptions, detection methods, and check points.

BASIC CHECK SUMMARY

Troubleshooting Common Symptoms

Diagnostic steps for oven lamp, overheating, no heating, sensor errors, and door lock failures.

CHECKING FLOW CHART BY FAILURE

Power Failure (Dead) / No Display Troubleshooting

Troubleshooting flowchart for power or display issues.

POWER FAILURE TROUBLESHOOTING

Power Failure Troubleshooting Steps

Detailed steps for diagnosing power and display failures.

POWER FAILURE WIRING CHECK

Electric Wiring and Connector Check for Power Issues

Verifying electric wiring and connector integrity for power issues.

NO HEATING (F9) DIAGNOSTICS

No Heating (F9) Diagnostic Steps

Diagnostic steps for oven or cooktop not heating.

OVEN NOT HEATING TROUBLESHOOTING

Oven Not Heating - Connector Check

Checking connectors for loose or disconnected wires when oven does not heat.

NO HEATING DIAGNOSTICS: THERMISTOR AND RELAYS

No Heating - Thermistor and Relay Checks

Testing thermistor and heater relays for heating failures.

COOKTOP NO HEATING DIAGNOSTICS

Cooktop No Heating Troubleshooting

Diagnostic steps for cooktop heating issues.

OVEN NOT HEATING: CONNECTOR AND HEATER

Oven Not Heating - Connector and Heater Resistance

Checking oven connectors and heater resistance.

COOKTOP HEATER RESISTANCE VALUES

SENSING FAIL (F1, F2) DIAGNOSTICS

Sensing Fail (F1, F2) Diagnostic Steps

Diagnostic steps for sensing failures.

SENSING FAIL TROUBLESHOOTING

Sensing Fail (F1, F2) - Connector and Thermistor Check

Checking connectors and thermistor for sensing failures.

OVEN HOT (F6) DIAGNOSTICS

Oven Hot (F6) Diagnostic Steps

Diagnostic steps for oven overheating issues.

OVEN HOT (F6) THERMISTOR AND RELAY CHECKS

Oven Hot (F6) - Thermistor and Relay Checks

Testing thermistor and heater relays for oven hot errors.

OVEN HOT (F6) THERMISTOR VALUE CHECK

Oven Hot (F6) - Thermistor Value Check

Checking the thermistor value in test mode.

KEYPAD FAILURE (F3 ERROR) DIAGNOSTICS

Keypad Failure (F3 Error) Troubleshooting

Diagnostic steps for keypad input errors.

F3 ERROR (KEYPAD FAILURE) TROUBLESHOOTING

F3 Error Troubleshooting Steps

Steps to diagnose keypad input errors.

APPENDIX: KEY OPERATION TEST

Key Operation Test Procedure

Procedure for testing the functionality of keypad buttons.

TROUBLE SHOOTING: GENERAL PROBLEMS

Oven Not Operating and Heating Issues

Possible causes and solutions for oven not operating or heating.

Surface Element Heating and Indicator Issues

Solutions for surface elements with low heat and indicator problems.

Oven Light and Cycling Issues

Steps to fix a non-functional oven light and diagnose cycling issues.

TROUBLE SHOOTING: TIMER, DOOR, AND ELEMENT ISSUES

Timer, Programming, and Door Latch Issues

Solutions for timer programming and door latch/open problems.

Baking, Broiling, and Element Burnout

Diagnosing baking, broiling, and element burnout issues.

Door Difficulty and Oven Use Recommendations

Addressing door opening difficulties and oven use recommendations.

TROUBLE SHOOTING: DOOR, GASKET, AND FAN ISSUES

Oven Door Alignment, Gasket, and Rack Fit

Adjusting door alignment, gasket, and rack fit.

Initial Usage Smoke and Self-Clean Smoking

Managing initial usage smoke and self-clean smoke.

Convection Fan Noise and Temperature Inaccuracies

Troubleshooting convection fan noise and temperature inaccuracies.

Failure Codes Reference

Reference to failure code troubleshooting.

SCHEMATIC DIAGRAM: OVERVIEW

Radiant Cook-Top Schematic Diagram

Schematic for the radiant cooktop components and wiring.

SCHEMATIC DIAGRAM: STRIP CIRCUITS

Strip Circuits for Oven Light, Broil, Easy Clean

Simplified circuit diagrams for oven light, broil, and easy clean functions.

Strip Circuits for Convection Modes

Simplified circuit diagrams for convection bake and roast modes.

SCHEMATIC DIAGRAM: COOK-TOP ELEMENTS

Cook-top Element Wiring Diagrams

Wiring diagrams for CR, RR, LR, RF, LF cook-top elements.

EXPLODED VIEW: INTRODUCTION

Exploded View: Controller Parts

Exploded view of the control panel and related components.

Exploded View: Cooktop Parts

Exploded view of the cooktop surface and elements.

Exploded View: Door Parts

Exploded view of the oven door components.

Exploded View: Drawer Parts

Exploded view of the drawer assembly.

Exploded View: Cavity Parts

Exploded view of the main oven cavity components.

EXPLODED VIEW: DOOR PARTS

EXPLODED VIEW: CONTROLLER PARTS

EXPLODED VIEW: COOKTOP PARTS

EXPLODED VIEW: DRAWER PARTS

EXPLODED VIEW: CAVITY PARTS

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