LG WM3670H A Series Service Manual
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LG WM3670H A Series Service Manual

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WASHING MACHINE
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE
PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
MODELS : WM3670H*A
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication, modification, copying or
transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity
from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in
this Service Manual.
Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONFIDENTIAL

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Summary of Contents for LG WM3670H A Series

  • Page 1 Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.

  • Page 2: Table Of Contents

    10-1. Cabinet and Control Panel Assembly ................... 5 10-2. Drum and Tub Assembly ...................... 5 10-3. Dispenser Assembly ......................5 11. Wiring Diagram ..........................5 Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 3: Specifications

    F ailure to follow all of the safety warnings in this manual could result in pro pe rty damage, injury to persons or death. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 4: Features And Technical Explanation

    NFC (Tag On Function) This feature uses LG Smart DiagnosisTM, Cycle Download, and Laundry Stats when you touch the LG appliance’s Tag On logo with your NFC equipped smartphone. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 5 If a power failure has occurred while in operation, the door will unlock after 5 minutes. Clicking sounds can be heard when the door is locked/unlocked. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 6 Tag On icon on the appliance . NFC reading performance of your smart phone must be higher than a certain level for using this function. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 7: Parts Identification

    Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 8: Installation And Test

    Keep the shipping bolts and spanner for future use. Insert the 4 caps (provided) into the hole. Keeping Turn clockwise to raise; counterclockwise to lower. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 9 CONNECT POWER PLUG • Avoid connecting several electric devices, • Connect the power plug to the wall outlet. as doing so may cause a fire. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 10 • Listen for a click to determine if the • If SERVICE is needed during door is unlocking. check, remove the remaining water by pulling out the hose cap. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 11: Operation

    5. OPERATION 5-1. CONTROL PANEL FEATURES WM3670H*A Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 12 Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 13 Water Plus : To add water during wash and rinse cycle. event wrinkles. Steam : Use this option for extra cleaning power. Wash Temp., Spin speed, Soil Level, Signal Button Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 14: Cycle Guide

    Ì Ì Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 15: Special Functions

    Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 16: Explanation Of Each Process

    UE. • If the eccentricity is good, the intermittent spin starts. • During this process, the drain pump works for drainage intermittently. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 • After door switch is off, end signal is displayed in the case of manual type and it takes around 2 minute to turn off door switch. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 18: Test Mode

    6. TEST MODE SPIN SPEED SOIL LEVEL Turns on all lamps and locks the door. WASH/RINSE DELAY WASH Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 19: Troubleshooting

    7. TROUBLESHOOTING Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 20 Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 21: Troubleshooting With Error

    7-3. TROUBLESHOOTING WITH ERROR INLET VALVE ERROR Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 22 Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 23 (Red 3P, male) - part of wire Replace the Check the IPM in the MAIN PWB controller. ASSEMBLY. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 24 45 Celsius and must not have more amount of supplied water Replace Does the spring of Latch than it should. Door Hook actuate? Assembly. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 25 UNBALANCE ERROR OVER FLOW ERROR WASH/RINSE DELAY WASH [Note] Installation check list Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 26 (21~23 ±10%) Fix the air Is the AIR CHAMBER and chamber the tube clogged? and remove the foreign material. Replace the MAIN PWB assembly. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 27: Troubleshooting Else

    Display PWB Reconnect Is the connector connected or repair to PCB/Noise filter the connector. disconnected or disassembled? Connecting connector MAIN PWB~ Display PWB Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 28 BUTTON DOESN’T WORK Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 29 Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 30 (1) Liquid chlorine Bleach Compartment (2) Liquid fabric Softener Compartment (3) Prewash Compartment (4) Main Wash Compartment Is the detergent caked or Clean the hardened? dispenser. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 31 (3) Prewash Compartment (4) Main Wash Compartment Is the liquid detergent/ Clean the cap softener/bleach cap clogged? container. Bleach cap Softener Liquid detergent cap Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 32: Before Using The Tag On Function

    7-5. Before using the Tag On function Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 33: Component Testing Information

    MAIN PW B A SS E MBLY FUSE Test points Result Test Points Result WH (1) to RD (3) WH (3) to RD (1) Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 34 – maximum of 3 times of the authorizing period. - Upon the fourth authorization of the impulse, the position of CAM goes back to the door-close position. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 35 700-1500 At 77 °F °C (3) to (4) 60-90 At 77 °F °C (4) to (5) Infinity (2) to (4) 120 Vac Voltage Input Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 36: Stator Assembly

    Test points (Windings) WINDINGS Result Test Points Result (Windings) (1) to (2) 5-15 (2) to (3) 5-15 (3) to (1) 5-15 Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 37: Pump Motor Assembly

    Two pump mot ors are used to dra in t he tub Test Drain Pump points (1) (2) Result Drain Pump Test Points Result 10-20 Ω (1) to (2) Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 38: Inlet Valve Assembly

    8-5. INLET VALVE ASSEMBLY Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 39 Circuit in the MAIN PCB / Wiring Diagram Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 40 26.1 k At 104°F (40°C) At 140°F (60°C) 12.1 k 8.5 k At 158°F (70°C) At 203°F (95°C) 3.8 k At 221°F (105°C) 2.8 k Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 41: Disassembly Instructions

    DISPLAY PWB ASSEMBLY assembly. 8 Disassemble the display PWB assembly. 9 Disconnect the NFC connector. Disassemble the NFC PCB from the PCB assembly, display Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 42 Disconnect the POWER connector and the pressure switch assembly. Remove the protective cover. PROTECT COVER Disconnect the connectors. Unscrew 1 screw on the back. Remove the main PWB. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 43: Dispenser Assembly

    Unscrew 2 screws from the back of the cabinet. NOISE FILTER Disassemble two (or three) connectors from the noise filter. Unscrew a screw from the top bracket. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 44 Put a flat ( - ) screwdriver or putty knife into the hinge slots at the bottom of the cover and pry it out. Unscrew the screw from the lower side of the cabinet cover. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 45 NOTE : When assembling the cabinet cover, connect the door switch connector. Lift and separate the cabinet cover. Disassemble the clamp assembly. Disassemble the gasket. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 46 Open the door and remove the gasket using the special gasket pliers. Unscrew the 2 screws. NOTE • Reconnect the connector after replacing the door switch assembly. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 47 Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 48 Unscrew 2 screws on the back of the top plate. TOP PLATE ASSEMBLY Pull the top plate backward and upward as shown. Disconnect the connector. Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 49 Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 50 M410 F215 A485 F210 A176 F110 A455 A450 A175 A104 A105 A106 A102 A111 A110 A410 A103 A150 A154 A152 A101 A141 A156 A390 A151 A153 A100 A131 A130 A430 A140 A133 A440 A300 A310 A220 A303 A200...
  • Page 51 K200 K123 K143 K360 K610 F140 K411 K611 K410 K141 K110 K111 K140 F3 15 K142 F310 K190 F463 F464 K570 K516 K135 K320 K530 K510 K340 K131 K130 K344 K346 K349 F464 K520 K347 F468 F468 K550 K540 F145 K342 K105 K348...
  • Page 52 F322 F323 F462 F321 F300 F170 F160 F227 F226 F225 F430 F220 F120 F130 F432...

  • Page 53: Wiring Diagram

    11. Wiring Diagram 결선도수정 필요 Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 54 P/No. MFL68588909...

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