LG DLE3777 Service Manual

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

Apr. 2004 PRINTED IN KOREA

P/No.:3828EL3005A

To avoid personal injury, disconnect power before servicing this product. If electrical power is required

for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks.

WARNING !

WHAT TO DO IF YOU SMELL GAS:

IMPORTANT SAFETY NOTICE

The information in this service guide is intended for use by individuals possessing adequate backgrounds of electrical, electronic, and mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.

RECONNECT ALL GROUNDING DEVICES

If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are

removed for service, they must be returned to their original position and properly fastened.

IMPORTANT

Electrostatic Discharge (ESD)

Sensitive Electronics

ESD problems are present everywhere. ESD may damage or weaken the electronic control assembly. The new control assembly may appear to work well after repair is finished, but failure may occur at a later date due to ESD stress.

Use an anti-static wrist strap. Connect wrist strap to green ground connection point or unpainted metal in the appliance.

- OR -

Touch your finger repeatedly to a green ground connection point or unpainted metal in the appliance.

Before removing the part from its package, touch the anti-static bag to a green ground connection point or unpainted metal in the appliance.

Avoid touching electronic parts or terminal contacts; handle electronic control assembly by edges only. When repackaging failed electronic control assembly in anti-static bag, observe above instructions.

■ Do not try to light a match, or cigarette, or turn on

any gas or electrical appliance.

■ Do not touch any electrical switches. Do not use any

phone in your building.

■ Clear the room, building or area of all occupants.

■ Immediately call your gas supplier from a neighbor’s

phone. Follow the gas supplier’s instructions carefully.

■ If you cannot reach your gas supplier, call the fire

department.

1. SPECIFICATIONS ..................................................................................................................4

2. FEATURES AND BENEFITS .................................................................................................... 6

3. INSTALLATION INSTRUCTIONS ........................................................................................... 6

4. DRYER CYCLE PROCESS..................................................................................................... 13

5. COMPONENT TESTING INFORMATION ..............................................................................14

6. MOTOR DIAGRAM AND SCHEMATIC..................................................................................17

7. CONTROL LAY - OUT .........................................................................................................18

8. WIRING DIAGRAM ............................................................................................................19

9. DIAGNOSTIC TEST .............................................................................................................20

9-1. TEST 1 120VAC ELECTRICAL SUPPLY..........................................................................21

9-2. TEST 2 THERMISTOR TEST --- MEASURE WITH POWER OFF .......................................22

9-3. TEST 3 MOTOR TEST ................................................................................................23

9-4. TEST 4 MOISTURE SENSOR ....................................................................................24

9-5. TEST 5 DOOR SWITCH TEST ...................................................................................25

9-6. TEST 6 HEATER SWITCH TEST - ELECTRIC TYPE...........................................................26

9-7. TEST 7 GAS VALVE TEST - GAS TYPE.........................................................................27

10. CHANGE GAS SETTING (NATURAL GAS, PROPANE GAS) ...............................................28

11. DISASSEMBLY INSTRUCTIONS .........................................................................................30

12. EXPLODED VIEW..............................................................................................................37

12-1. CONTROL PANEL & PLATE ASSEMBLY.......................................................................37

12-2. CABINET & DOOR ASSEMBLY...................................................................................38

12-3-1. DRUM & MOTOR ASSEMBLY : ELECTRIC TYPE ........................................................39

12-3-2. DRUM & MOTOR ASSEMBLY : GAS TYPE...............................................................40

13. REPLACEMENT PARTS LIST.................................................................................................41

CONTENTS

SPECIFICATIONS

■ Name : Electric and Gas Dryer

■ Power supply : Please refer to the rating label regarding detailed

information.

■ Size : 68.6X98.3X76.1 (cm)

■ Dryer capacity : IEC 7.3cu.ft.

■ Weight : 126 (Ibs)

Specifications are subject to change by manufacturer.

■ ACESSORIES

Dryer rack (1 each) Stacking kit (1 each)

Purchased Separately

Pedestal (1 each)

Purchased Separately

See page 6 for how to use. See page 7 for how to use. See page 8 for how to use.

Temperature

Moisture

High / Low / Off

Sensor

124 / 144

Door Trim

Top Plate

Color

Blue WhiteChromate + STS Deco

PaintedPorcelain

Blue White

120V / 240V 60Hz (26A)

POWER SUPPLY

LAMP

HEATER

MOTOR

7.3 cu.ft.

Electronic

GAS VALVE

5400W (22.5A)

250W (4.5A)

15 W (125mA)

13 W (110mA) x 2

ELECTRICITY

CONSUMPTION

Blue White

Black Titanium

Material & Finishes

DLG3788W

DLG5988W

DLG5988B

ITEM

Child Lock

Reversible Door

Interior Light

Product (WxHxD)

Packing (WxHxD)

Sound levels

Dryer Rack

Drum

No. of Dry Levels

No. of Dry Options

No. of Programs

DRUM CAPACITY

CONTROL TYPE

No. of Temperature Controls

Weight (lbs) : Net / Gross

AC 120V

(GAS TYPE)

AC 240V (ELECTRIC TYPE)

Electrode sensor

Termistor

AC 120V

REMARK

Avaiable

27" x 42

x 28

" x 44

x 30

Stainless Steel

DLE5977WM DLE5988WM

DLE3777W

DLE5977W

DLE5977B

DLE5977S DLG5988S DLE5977SM DLG5988SM

FEATURES AND BENEFITS

INSTALLATION INSTRUCTIONS

DLE5977W/DLG5988W/DLE5977B/DLG5988B/DLE5977WM/DLG5988WM/DLE5977SM/DLG5988SM

DLE3777W/DLG3788W

Open the door.

Hold the dryer rack with both hands.

Put the dryer rack into the drum

Make sure that dryer is evenly placed right onto the drum inside and door rim.

Dryer Rack Installation Instructions

To ensure safe and secure installation, please observe the instructions below.

Place washer firmly on a stable, even and solid floor as product installation instructions describes in owner’s manual.

Peel protective paper off the tape from the stacking kit side bracket.

Fit the stacking kit side bracket firmly to the side of top plate by attaching the doublefaced tape to top plate as picture shows.

Secure stacking kit side bracket to the washer with a screw on the back of bracket. Repeat Steps 2, 3, 4 for the other side.

Place the dryer on top of the washer by fitting legs as shown in the picture. Avoid finger injuries - be careful not to pinch fingers between the washer and dryer. Slide washer slowly backwards to the stopper of kit.

Insert the front stacking kit. Push the front stacking kit back to the stoppers of side stacking kit.

Screw both sides of the front kit.

• Do not use stacking kit with a gas dryer in potentially unstable conditions like a mobile home.

Stacking kit

Do not attempt installation with one person.

Incorrect installation procedure can cause serious accidents and physical Injuries.

The weight of the dryer and the height of installation makes the stacking procedure too risky for one person. This procedure should be performed by 2 or more experienced service personnel.

W ARNING

1 2

Stacking Kit Installation Instructions

For washer, dryer, and combo LG 27

25.4

(64.5cm)

2.86

(7cm)

18.7

(47.5 cm)

(68.6cm)

7.24

(18.4cm)

Pedestal Installation Instructions

Attach the double-faced tape of the bracket to the dryer as shown so the bent parts of the brackets align with the edge and can be attached to the pedestal with screws.

NOTE :

Attach the lower side first.

Be sure to press the adhesive parts of the brackets firmly to the appliance.

Install the eight (8) screws(supplied) to attach the brackets to the pedestal.

Move the dryer to the desired place.

NOTE :

The appliance and pedestal assembly must be placed on a solid and level floor for proper operation. Adjust the legs of the appliance and pedestal by turning with a wrench. Then, adjust the lock unt toward the pedestal while holding the pedestal leg using a wrench.

Remove pedestal, installation hardware, and instructions from the shipping carton.

Position dryer on top of the pedestal.

Remove the paper from the bracket.

for washer/ combo

for dryer

Use the instructions at this section if your home has a 3-wire receptacle (NEMA type 10-30R) and you will be using a UL listed, 120/240 volt minimum, 30 amp, dryer power supply cord.

Review the following options to determine the appropriate electrical connection for your home:

If this type is available at your home. you will be connecting to a fused disconnect or circuit breaker box

Important : use 4-wire connection in the places such as mobile homes and areas where 3-wire connections is not available.

Prepare minimum 5ft(1.52m) of length in order for dryer to be replaced.

First, peel 5 inch (12.7cm) of covering material from end. Make a 5 inch of ground wire bared. After cutting 1

/2 inch (3.8cm) from 3 other wires. peel insulation back 1inch (2.5cm). Make ends of 3 wires a hook shape.

Then, put the hooked shape end of the wire under the screw of the terminal block(hooked end facing rightward) and pinch the hook together and screw tightly.

Use the instructions at this section if your home has a 4-wire receptacle (NEMA type 14-30R) and you will be using a UL listed, 120/240 volt minimum, 30 amp, dryer power supply cord.

If this type is available at your home. you will be connecting to a fused disconnect or circuit breaker box

1. Connect neutral wire(white) of power cord to center

terminal block screw.

2. Connect red and black wire to the left and right

terminal block screws.

3. Connect ground wire(green) of power cord to external

ground screw and move neutral ground wire of appliance and connect it to center screw.

4. Make sure that the strain relief screw is tightened.

and be sure that all terminal block nuts are on tight and power cord is in right position.

(12.7 cm)

(8.6 cm)

(2.5 cm)

(12.7 cm)

(2.5 cm)

(8.9 cm)

3-wire direct

4-wire receptacle (NEMA type14-30R)

3-wire receptacle (NEMA type10-30R)

4-wire direct

(12.7 cm)

(8.6 cm)

4-wire connection : Direct wire

(12.7 cm)

(8.6 cm)

(2.5 cm)

(12.7 cm)(12.7 cm)

(2.5 cm)

(8.9 cm)

d e

Important : use 3-wire connection in the places such as mobile homes and areas where 3-wire connections is not available.

Prepare minimum 5ft(1.52m) of length in order for dryer to be replaced.

First, peel 3 1/2 inch (8.9cm) of covering material from end and bare 1 inch from the ends.

1. Connect neutral wire(white) of power cord to center terminal block screw.

2. Connect red and black wire to the left and right terminal block screws.

3. Make sure that the strain relief screw is tightened and be sure that all terminal block nuts are on tight and power cord is in right position.

Then, put the hooked shape end of the wire under the screw of the terminal block(hooked end facing rightward) and pinch the hook together and screw tightly.

(2.5 cm)

(8.9 cm)

3-wire connection : Direct wire

1. Connect neutral wire(white) of power cord to center terminal block screw.

2. Connect red and black wire to the left and right terminal block screws.

3. Connect ground wire(green) of power cord to external ground screw and move neutral ground wire of appliance and connect it to center screw.

4. Make sure that the strain relief screw is tightened. and be sure that all terminal block nuts are on tight and power cord is in right position.

• lf your local codes or ordinances do not allow the use of a 3 wire connection, or you are installing your dryer in a mobile home, you must use a 4wire connection.

Option 1: 4-wire connection with

a Power supply cord.

1. Connect neutral wire(white) of power cord to center terminal block screw.

2. Connect ground wire of appliance and neutral wire of power cord to center terminal block screw.

3. Connect red and black wire to the left and right terminal block screws.

4. Make sure that the strain relief screw is tightened. and be sure that all terminal block nuts are on tight and power cord is in right position.

5. Connect a independent ground wire from external ground connector to proper ground.

lf your local codes or ordinances permit the connection of a frame-grounding conductor to the neutral wire, use these instructions. If your local codes or ordinances do not allow the connection of a frame-grounding conductor to the neutral wire, use the instructions under Section 3: Optional

3-wire connection.

Option 2: 3-Wire Connection with

a Power Supply Cord

• If your local codes or ordinances do not allow the connection of a frame-grounding conductor to the neutral wire, use the instructions under this section.

Option 3: Optional 3-wire

connection.

3-2. Connect Gas Supply Pipe (Gas Dryer O NLY)

1. Make certain your dryer is equipped for use with the type of gas in your laundry room. Dryer is equipped at the factory for Natural Gas with a 3/8” N.P.T. gas connection.

2. Remove the shipping cap from the gas connection at the rear of the dryer. Make sure you do not damage the pipe thread when removing the cap.

3. Connect to gas supply pipe using a new flexible stainless steel connector.

4. Tighten all connections securely. Turn on gas and check all pipe connections (internal & external) for gas leaks with a non-corrosive leak detection fluid.

5. For L.P. (Liquefied Petroleum) gas connection, refer to section on Gas Requirements.

For further assistance, refer to section on Gas Requirements.

1 New Stainless Steel Flexible Connector - Use

only if allowed by local codes (Use Design A.G.A. Certified Connector)

2 1/8” N.P.T. Pipe Plug

(for checking inlet gas pressure)

3 Equipment Shut-Off Valve-Installed within 6’

(1.8 m) of dryer

4 Black Iron Pipe

Shorter than 20’ (6.1 m) - Use 3/8” pipe Longer than 20’ (6.1 m) - Use 1/2” pipe

5 3/8” N.P.T. Gas Connection

Time

DRYER CYCLE PROCESS

Cycle

HEAVY DUTY

3Hr

Off Time: 6min

On Time: 10sec

Temperature Control for each cycle

HIGH

MID

HIGH

MEDIUM

LOW

ULTRA

LOW

(HIGH)

(MID

HIGH)

COTTON/

TOWELS

NORMAL

PERM

PRESS

DELICATES

ULTRA

DELICATE

SPEED DRY

FRESHEN UP

AIR DRY

(Normal)

54min Saturation

Saturation

55min

41min

36min

32min

34min

25min

min

(5min)

N/A

68±4°C

66±4°C

60±4°C

52±3°C

45±3°C

(70±5°C)

(66±5°C)

heater

47±5°C

38±5°C

(47±5°C)

N/A

Saturation

Load

Sensor

Dry *

Manual

Dry **

Default

Drying

Electro-

sensor

Temp-

Control

Default

time

Temp-

Control**

Cooling Wrinkle care

Conditions of operation and termination

Temp-

erature

Dry

Level

Display

time

Motor

Heater

* Sensor dry : “Dry Level” is set by users. ** Manual dry : “Temperature control” is set by users. Default settings can be adjusted by users.

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