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LG DLE3777W Service Manual

LG DLE3777W
41 pages
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Website:http://www.LGservice.com [For U.S.A]
www.lg.ca [For Canada]
ELECTRIC & GAS DRYER
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE
TROUBLES CORRECTLY BEFORE OFFERING SERVICE.
MODEL :
DLE5977W/DLG5988W
DLE5977B/DLG5988B
DLE3777W/DLG3788W
DLE5977WM/DLG5988WM
DLE5977SM/DLG5988SM
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LG DLE3777W Specifications

General IconGeneral
TypeElectric
Capacity7.4 cu. ft.
ColorWhite
Steam RefreshNo
Steam SanitaryNo
Allergiene CycleNo
Drying RackYes
Reversible DoorYes
SmartDiagnosisYes
ENERGY STAR QualifiedYes
Temperature SettingsHigh, Medium High, Medium, Low, Ultra Low
FeaturesSensor Dry, Wrinkle Care
Drying ProgramsMultiple

Summary

Electric & Gas Dryer Service Manual

Service Manual Introduction

Title page of the service manual for LG electric and gas dryers.

Important Safety Notices

General Safety Warnings

General warnings about power disconnection and grounding for safe servicing.

Gas Leak Safety Procedures

Steps to follow in case of detecting a gas leak.

Electrostatic Discharge (ESD) Precautions

Guidelines for preventing damage from electrostatic discharge to electronic components.

Specifications

Dryer Model Specifications

Detailed specifications for LG dryers, including dimensions and capacity.

Optional Accessories

Information on optional dryer accessories like racks and pedestals.

Features and Benefits

Dryer Features Overview

Highlights of the dryer's key features and user benefits.

Installation Instructions

Dryer Rack Installation

Instructions for installing the dryer rack inside the drum.

Stacking Kit Installation

Step-by-step guide for securely stacking the dryer on a washer.

Pedestal Installation

Instructions for mounting the dryer onto an optional pedestal.

Electrical Connections

4-Wire Receptacle and Direct Wire

Guidance for 4-wire power supply and direct wiring configurations.

3-Wire Receptacle and Direct Wire

Guidance for 3-wire power supply and direct wiring configurations.

3-Wire Direct Connection Details

Detailed steps for a 3-wire direct electrical connection.

4-Wire Power Cord Connection

Instructions for connecting a 4-wire power supply cord.

3-Wire Power Cord Connection

Instructions for connecting a 3-wire power supply cord.

Optional 3-Wire Connection Method

Steps for an optional 3-wire connection configuration.

Gas Supply Connection

Connecting Gas Supply Pipe (Gas Dryer)

Procedure for connecting the gas supply pipe to the gas dryer.

Dryer Cycle Processes

Sensor Dry Cycle Details

Details on Sensor Dry cycle types, settings, and operation.

Manual Dry Cycle Details

Details on Manual Dry cycle types, settings, and operation.

Component Testing

Thermal Cut Off & Thermostat Testing

Testing procedures for thermal cut-offs and thermostats.

Door & Idler Switch Testing

Procedures for testing door and idler switches.

Heater, Thermistor, Motor Testing

Testing resistance values for heater, thermistor, and motor components.

Gas Valve, Igniter, Frame Detect Testing

Testing procedures for gas valve, igniter, and flame detector.

Outlet Thermostat Testing

Testing procedures for auto and manual reset outlet thermostats.

Motor Diagram and Schematic

Centrifugal Switch Operation

Diagram and explanation of the centrifugal switch in stop and run modes.

Control Panel Layout

PWB Assembly Display Layout

Diagram showing the layout of the PWB assembly display.

PWB Assembly Component Layout

Diagram showing the detailed layout of the PWB assembly.

Wiring Diagrams

Electric Dryer Wiring Diagram

Wiring schematic for the electric dryer model.

Gas Dryer Wiring Diagram

Wiring schematic for the gas dryer model.

Diagnostic Testing

Activating Diagnostic Mode

Steps to activate the diagnostic test mode for troubleshooting.

Diagnostic Test Actions and Results

Table detailing actions, display readings, and expected results for tests.

Test 1: Electrical Supply Check

Procedure to check the 120VAC electrical supply to the controller.

Test 2: Thermistor Resistance

Procedure to measure thermistor resistance with power off.

Test 3: Motor Resistance Check

Procedure to test motor resistance, door switch, and idle switch.

Test 4: Moisture Sensor Test

Procedure to test moisture sensor readings and voltage output.

Test 5: Door Switch Test

Procedure to test door switch resistance in open and closed states.

Test 6: Electric Heater Switch Test

Procedure to test heater switch and safety thermostats in electric dryers.

Test 7: Gas Valve Test

Procedure to test gas valve voltage and resistance.

Gas Setting Conversion

Valve and Orifice Adjustment

Steps for converting between Natural Gas and Propane Gas settings.

Disassembly Instructions

Top Plate Removal

Procedure for removing the dryer's top plate.

Control Panel Assembly Removal

Steps to remove the control panel assembly and its components.

Cover Cabinet Removal

Procedure for removing the dryer's cabinet cover.

Tub Drum (Front) Disassembly

Steps to disassemble the front tub drum assembly.

Drum Assembly & Belt Adjustment

Instructions for drum assembly and loosening the drive belt.

Drum Lamp Replacement

Procedure for replacing the lamp inside the dryer drum.

Dryer Exhaust Duct Modification

Instructions for changing or modifying the dryer exhaust duct.

Filter Assembly Removal

Procedure for removing the dryer's filter assembly.

Blower Housing Disassembly

Steps to disassemble and remove the blower housing.

Back Cover Removal

Procedure for removing the dryer's back cover.

Air Duct Removal

Procedure for removing the dryer's air duct.

Roller Replacement

Steps to remove and replace the dryer rollers.

Exploded Views

Control Panel & Plate Assembly Diagram

Exploded view of the control panel and associated plates.

Cabinet & Door Assembly Diagram

Exploded view of the dryer's cabinet and door assembly.

Drum & Motor Assembly (Electric Type)

Exploded view of the drum and motor assembly for electric dryers.

Drum & Motor Assembly (Gas Type)

Exploded view of the drum and motor assembly for gas dryers.

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