LG DLE3777W Service Manual
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LG DLE3777W Service Manual

Electric & gas dryer
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See also: Owner's Manual
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
Website:http://www.LGservice.com [For U.S.A]
www.lg.ca [For Canada]

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Summary of Contents for LG DLE3777W

  • Page 1 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...

  • Page 2: 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.

  • Page 3: Table Of Contents

    CONTENTS 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.

  • Page 4: Specifications

    SPECIFICATIONS I Name : Electric and Gas Dryer I Power supply : Please refer to the rating label regarding detailed information. I Size : 68.6X98.3X76.1 (cm) I Dryer capacity : IEC 7.3cu.ft. I Weight : 126 (Ibs) Specifications are subject to change by manufacturer. I ACESSORIES Dryer rack (1 each) Stacking kit (1 each)
  • Page 5 DLE5977WM DLE5977S DLE5988WM DLG5988S DLE5977B DLE3777W DLE5977W DLE5977SM DLG5988B DLG3788W REMARK ITEM DLG5988W DLG5988SM Color Blue White Black Titanium Blue White Material & Top Plate Porcelain Painted Finishes Door Trim Chromate + STS Deco Blue White POWER SUPPLY 120V / 240V 60Hz (26A) MOTOR 250W (4.5A)

  • Page 6: Features And Benefits

    FEATURES AND BENEFITS DLE5977W/DLG5988W/DLE5977B/DLG5988B/DLE5977WM/DLG5988WM/DLE5977SM/DLG5988SM DLE3777W/DLG3788W INSTALLATION INSTRUCTIONS Dryer Rack Installation Instructions Put the dryer rack into Make sure that dryer is Open the door. the drum evenly placed right onto the Hold the dryer rack drum inside and door rim.

  • Page 7: Stacking Kit Installation Instructions

    Stacking Kit Installation Instructions To ensure safe and secure installation, please observe the instructions below. W A R N I N G Secure stacking kit side bracket to the washer with a screw on the back of bracket. Do not attempt installation with one person. Repeat Steps 2, 3, 4 for the other side.
  • Page 8 Pedestal Installation Instructions Attach the double-faced tape of the bracket to the For washer, dryer, and combo LG 27 dryer as shown so the bent parts of the brackets align with the edge and can be attached to the pedestal with screws.
  • Page 9 Review the following options to determine the appropriate electrical connection for your home: 4-wire connection : Direct wire 4-wire receptacle (NEMA type14-30R) Important : use 4-wire connection in the places such as mobile homes and areas where 3-wire connections is not available. Use the instructions at this section if your home has a 4-wire receptacle (NEMA type 14-30R) and you Prepare minimum 5ft(1.52m) of length in order for...
  • Page 10 3-wire connection : Direct wire Option 1: 4-wire connection with a Power supply cord. Important : use 3-wire connection in the places such as mobile homes and areas where 3-wire • lf your local codes or ordinances do not allow the connections is not available.
  • Page 11 Option 3: Optional 3-wire Option 2: 3-Wire Connection with connection. a Power Supply Cord • If your local codes or ordinances do not allow the lf your local codes or ordinances permit the connection of a frame-grounding conductor to the connection of a frame-grounding conductor to the neutral wire, use the instructions under this neutral wire, use these instructions.

  • Page 12: Connect Gas Supply Pipe (Gas Dryer Only)

    3-2. Connect Gas Supply Pipe (Gas Dryer ONLY) For further assistance, refer to section on Gas Requirements. 1. Make certain your dryer is equipped for use with the 3. Connect to gas supply pipe using a new flexible type of gas in your laundry room. Dryer is equipped stainless steel connector.

  • Page 13: Dryer Cycle Process

    DRYER CYCLE PROCESS Default Conditions of operation and termination Drying Cooling Wrinkle care Cycle Temp- Display erature time Electro- Temp- Default Temp- Level Time sensor Control time Control** 68 ± 4°C 47 ± 5°C HEAVY DUTY HIGH (Normal) 54min Saturation (5min) COTTON/ 66 ±...

  • Page 14: Component Testing Information

    COMPONENT TESTING INFORMATION When checking the Component, be sure to turn the power off, and do voltage discharge sufficiently. CAUTION Component Test Procedure Check result Remark 1. Thermal cut off Measure resistance of terminal If thermal fuse is open must •...
  • Page 15 Component Test Procedure Check result Remark 7. Heater Measure resistance of the • Electric type following terminal Terminal : 1 (COM) - 2 Resistance value : 10Ω Terminal : 1 (COM) - 3 Resistance value : 10Ω Terminal : 2 - 3 Resistance value : 20Ω...
  • Page 16 Component Test Procedure Check result Remark 13. Outlet Thermostat Measure resistance of terminal • Gas type (Auto reset) to terminal • Gas funnel ∞ Open at 203 ± 7°F (95 ± 5°C) Resistance value Continuity < 1Ω Close at 158 ± 9°F (70 ± 5°C) •...

  • Page 17: Motor Diagram And Schematic

    MOTOR DIAGRAM AND SCHEMATIC When checking Component, be sure to turn Power off, then do voltage discharge sufficiently. NOTE Contact On / Off by Centrifugal Switch STOP MODE RUN MODE (When Motor does not operate) (Motor operates) Centrifugal switch Centrifugal switch (Pull Drive forward)

  • Page 18: Control Lay - Out

    PWB ASSEMBLY DISPLAY LAY-OUT MODEL DISPLAY AS DIAGNOSTIC TEST OPTION PART MODEL P/No DISPLAY OP 1 OP 2 OP 3 OP 4 OP 5 OP 6 DLE5977WM/SM, DLE5977W/B 18:FO 6871EC1115A DLG5988WM/SM, DLG5988W/B 19:FO 6871EC1115B DLE3777W 18:F1 6871EC1115C DLG3788W 19:F1 6871EC1115D PWB ASSEMBLY LAY-OUT...

  • Page 19: Wiring Diagram

    WIRING DIAGRAM ORANGE ORANGE BLUE BLUE PINK PINK BLUE COIL INNER BLUE YELLOW COIL OUTER BLUE THERMOSTAT BLUE SAFETY GRAY WHITE SWITCH SWITCH BROWN BROWN YELLOW CENTRIFUGAL CENTRIFUGAL BROWN BROWN WHITE BLACK BLACK WHITE WHITE MODEM MODEM...

  • Page 20: Diagnostic Test

    DIAGNOSTIC TEST 1. This TEST should be used for Factory test /Service test. Do not use this DIAGNOSTIC TEST other than specified. 2. Activating the Heater manually with the Door open may trip the Thermostat attached to the Heater, therefore do not activate it manually.

  • Page 21: Test 1 120Vac Electrical Supply

    Test 1 120VAC Electrical supply When measuring power, be sure to wear insulated gloves, to and avoid an Caution electric shock. Trouble Symptom No power was applied to Controller. (LED, Display off) Measurement Condition With Dryer Power On; Connector linked to Controller. •...

  • Page 22: Test 2 Thermistor Test

    Test 2 Thermistor Test --- Measure with Power Off Before measuring resistance, be sure to turn Power off, and do voltage discharge. Caution (When discharging, contact the metal plug of Power cord with the Ground.) During Diagnostic Test, tE1 and tE2 Error occur. Trouble Symptom During operation, Heater would not turn off, or remains on.

  • Page 23: Test 3 Motor Test

    Test 3 Motor test Before measuring resistance, be sure to turn Power off, and do voltage discharge. Caution (When discharging, contact the metal plug of Power cord with earth line.) Trouble Symptom Drum will not rotate; No fan will function; No Heater will work. Measurement Condition Turn the Dryer’s Power Off, then measure resistance.

  • Page 24: Test 4 Moisture Sensor

    Test 4 Moisture sensor Before measuring resistance, be sure to turn Power off, and do voltage discharge. Caution (When discharging, contact the metal plug of Power cord with earth line.) Trouble Symptom Degree of dryness does not match with Dry Level. Measurement Condition Turn the Dryer’s Power Off, then measure resistance.

  • Page 25: Test 5 Door Switch Test

    Test 5 Door switch test Before measuring resistance, be sure to turn Power off, and do voltage discharge. Caution (When discharging, contact the metal plug of Power cord with earth line.) Door Opening is not sensed.(During operation, when opening Door, Drum motor and Trouble Symptom Heater run continuously;...

  • Page 26: Test 6 Heater Switch Test - Electric Type

    Test 6 Heater switch test - Electric Type Before measuring resistance, be sure to turn Power off, and do voltage discharge. Caution (When discharging, contact the metal plug of Power cord with earth line.) While operating, Heating will not work. Trouble Symptom Drying time takes longer.

  • Page 27: Test 7 Gas Valve Test - Gas Type

    Test 7 GAS Valve test - Gas Type Caution When measuring power, be sure to wear insulated gloves, to avoid electric shock. While operating, Heating will not work. Trouble Symptom Drying time takes longer. Measurement Condition With dryer power on Power On &...

  • Page 28: Change Gas Setting (Natural Gas, Propane Gas)

    CHANGE GAS SETTING (NATURAL GAS, PROPANE GAS) Warning After Natural Gas Setting, applying Propane Gas Orifice or wrong use of Natural Gas Orifice will result in fire. Conversion must be made by a qualified technician. Initially , Natural Gas mode is set. Propane Gas Orifice is on sale as a Service Part to authorized servicers only.
  • Page 29 GAS VALVE FLOW START KEY PUSH “VALVE 1” ON IGNITE ON IGNITE TEMPERATURE ABOUT 370”F FRAME DETECT OPEN IGNITE OFF “VALVE 2” ON GAS IGNITION FRAME DETECT CLOSE DRYING “VALVE 2” OFF GAS IGNITION GAS VALVE STRUCTURE START VALVE 1 IGNITER FRAME OPEN...

  • Page 30: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS Disassemble and repair the unit only after pulling out power plug from the outlet. Remove 3 screws on the upper plate. Push the top plate back ward. Lift the top plate...
  • Page 31 Remove 2 screws on the control panel frame. Disconnect the connectors. Pull the control panel assembly upward and then forward. Remove 9 screws on the PWB(PCB) assembly, display. Remove 4 screws on the PWB(PCB) assembly, main. Disassemble the control panel assembly.
  • Page 32 Disassemble the top plate. Disassemble the control panel assembly. Disassemble the door assembly. Remove 2 screws. Remove 4 screws from the top of cabinet cover. Disconnect the harness of door switch.
  • Page 33 Disassemble the top plate. Remove Cover Cabinet. Disconnect the door lamp and electrode sensor connector. Remove 4 screws. Disassemble the Tub Drum [Front]. Disassemble the top plate. Remove the Cabinet Cover and Tub drum [front]. Loosen belt from motor and idler pulleys. Carefully remove Drum out.
  • Page 34 Remove a screw and exhaust duct. 2-1. Detach and remove a knockout at the botton, left or right side as desired. (Right Side Vent not available on Gas dryer) the order of work. 2-2. Reconnect the another duct[11 in(28cm)] to the DUCT blower housing, and attach the duct to the TAPE...
  • Page 35 Remove the filter. Remove 3 screws. Remove Cover Gride. Disconnect electrode sensor. Disassembly the top plate. Remove the Cabinet Cover and Tub Drum [Front]. Remove the Drum assembly. Remove 2 screws and cover(Air guide). Remove the bolt and washer. Remove the fan. Disconnect the motor clamp and motor.
  • Page 36 Disassemble the top plate. Remove the Cover Cabinet. Remove filter and 2 screws. Remove the air duct. Disassemble the top plate. Remove the Cover Cabinet and Tub Drum [Front]. Remove the Drum assembly and Tub Drum [Rear]. Disconnect Air duct from the Tub Drum [Front]. Remove the roller from the Tub Drum [Front] and Tub Drum [Rear].

  • Page 37: Exploded View

    EXPLODED VIEW 12-1. Control Panel & Plate Assembly A210 A130 A140 A120 A110...

  • Page 38: Cabinet & Door Assembly

    12-2. Cabinet & Door Assembly A700 A800 A570 A560 A390 A330 A600 A550 A300 A500 A320 A305 A310 A530 A510 A520 A525 A430 A540 A400 A450 A410 A460 A420...

  • Page 39: Drum & Motor Assembly : Electric Type

    12-3-1. Drum & Motor Assembly : Electric Type F200 K400 K120 K140 K100 K130 K251 K250 K310 K330 K320 K340 K222 K221 K620 K230 K210 K250 K350 K360 K610 K550 K560 K251 K240 K530 K640 K651 F140 K510 K520 K540 F130 K650 F110...

  • Page 40: Drum & Motor Assembly : Gas Type

    12-3-2. Drum & Motor Assembly : Gas type F200 K400 K120 K140 K100 K130 K251 K250 K310 K330 K320 K340 K222 K221 K620 K230 K210 K250 K350 K360 K610 K550 K560 K251 K240 K530 K640 K651 K510 K520 K540 M141 M150 M240 M220...

  • Page 41: Replacement Parts List

    Apr. 2004 PRINTED IN KOREA P/No.:3828EL3005A...

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