LG LMA1180ST Service Manual
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LG LMA1180ST Service Manual

LG LMA1180ST Service Manual

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This Owner's Manual is provided and hosted by Appliance Factory Parts.
LG LMA1180ST
Owner's Manual
Shop genuine replacement parts for LG LMA1180ST
Find Your LG Microwave Parts - Select From 955 Models
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Summary of Contents for LG LMA1180ST

  • Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. LG LMA1180ST Owner's Manual Shop genuine replacement parts for LG LMA1180ST Find Your LG Microwave Parts - Select From 955 Models -------- Manual continues below --------...
  • Page 2 삼 흥 정 판 Internal Use Only Website http://biz.lgservice.com MICROWAVE OVEN SERVICE MANUAL MODEL: LMA1180ST CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. May, 2008 Printed in Korea P/NO : MFL06272509...

  • Page 3: Safety Precautions

    CAUTION MICROWAVE RADIATION DO NOT BECOME EXPOSED TO RADIATION FROM THE MICROWAVE GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Table Of Contents

    REPLACEMENT PARTS LIST - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 5: Specifications

    Owner's manual Glass turntable Roller Rest This microwave oven is designed for household use only. It is not recommended for commercial purposes. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 6: Cautions

    • NEVER put iron tools on the magnetron. • NEVER put anything into the latch hole and the interlock switches area. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 7: Installations

    7. Place the microwave oven as far away as possible from TV, RADIO, COMPUTER, etc., to prevent interference. INSURE PROPER GROUND AND FIRM CONNECTION BEFORE USE Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 8: Operating Instructions

    10. EZ-ON: Touch this pad to set and start quickly at 100% power level. 11. CLOCK: Used to set the time of day. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 9: Operating Sequence

    • Touch and hold 0 pad L appear on the display. TO CANCEL CHILD LOCK • Touch the • Touch and hold 0 pad L disappear. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 10: Schematic Diagram

    SCHEMATIC DIAGRAM LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 11: Circuit Description

    This 3.2 volts is applied to the magnetron to heat the magnetron filament through two noise-preventing choke coils. MICOM CONTROLLER Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Service Information

    4 mW/cm . Always start measuring of an unknown field to assure safety for operating personnel from radiation leakage. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 13 5 mW/cm.sq. Leakage for a fully assembled pin-in-head. oven (Before the latch switch (primary) is interrupted) with the door in a slightly opened position-less than 2 mW/cm.sq. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: Measurement Of Microwave Power Output

    5) Disconnect the leadwire from connector(CN1) of the PCB SUB ASS’Y. CAUTION: DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE SERVICING (refer to page 2-1) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 15 4) Remove the screw holding the high voltage capacitor bracket. Remove door assembly Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 Magnetron Waveguide Dome Taptite Screw Waveguide Bracket Magnetron Gasket Wire Leads Magnetron Turntable Motor LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 17 Make sure the primary, monitor, and secondary switches operate properly by following the continuity test procedure. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 18: Interlock Continuity Test

    Primary Switch Monitor Switch Secondary Switch NOTE : After checking for the continuity of switches, make sure that are connected correctly. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 19: Component Test Procedure

    (Wire leads removed) (Ohm-meter scale: Rx1) • Filament terminal 2. Measure the resistance. Normal: Infinite (Ohm-meter scale: Rx1000) • Filament to chassis Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 Some inexpensive meters may indicate infinite resistance in both direction. Measure the continuity (Reverse). Normal: Infinite. (Ohm-meter scale: Rx10000) Abnormal: Continuity. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 21 • MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION. • WHEN REMOVING THE WIRE LEADS FROM THE PARTS, BE SURE TO GRASP THE CONNECTOR, NOT THE WIRES. Copyright © 2007 LG Electronics. Inc. All right reserved. 5-10 LGE Internal Use Only...

  • Page 22: Trouble Shooting

    1. Use plastic wrap or lid. microwave by their 2. Stir once or twice while characteristics. cooking soup, cocoa or milk, etc. LGE Internal Use Only 5-11 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 23 4. Random programming when touching other pads. 5. Display is fixed at some figure and can not accept any input. Copyright © 2007 LG Electronics. Inc. All right reserved. 5-12 LGE Internal Use Only Only for training and service purposes...
  • Page 24 Continuity. Defective power Replace power Check continuity No continuity. supply cord. supply cord. of power supply cord. LGE Internal Use Only 5-13 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 25 NOTE: Simple test of power output-conducted by heating one liter water for one min. if available. Minimum 8.5 C temperature rise is normal condition. Copyright © 2007 LG Electronics. Inc. All right reserved. 5-14 LGE Internal Use Only Only for training and service purposes...
  • Page 26 2 and check continuity relay 2. (Operate the unit) LGE Internal Use Only 5-15 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 27: Exploded View

    #EV# EXPLODED VIEW INTRODUCTION MODEL: OVEN CAVITY PARTS INTERIOR PARTS BASE PLATE PARTS DOOR PARTS LATCH BOARD PARTS CONTROL PANEL PARTS -6-1-...
  • Page 28 #EV# DOOR PARTS 13581A 13536A 13552A 13213A 13551A 14026A 14970A -6-2-...
  • Page 29 #EV# CONTROLLER PARTS 24781M 23551A 268711 WTP018 24510L 24970A 23551B -6-3-...
  • Page 30 #EV# OVEN CAVITY PARTS 33112U WSZ185 33052A WTT010 33390G 35889A 36549S WTP013 -6-4-...
  • Page 31 #EV# LATCH BOARD PARTS 43500A 43501A 466001 466003 466001 WSZ085 -6-5-...
  • Page 32 #EV# INTERIOR PARTS 568771 WSZ002 56411A 948502 948504 56930V 50FZZA 948502 56201A WTT028 56549F WEB001 55900A WTT037 54974S WSZ002 56912B 56851D 54980A WEB001 50CZZH 948501 55262A WTT028 WSZ002 54810C 948503 34930W 56324A -6-6-...
  • Page 33 #EV# BASE PLATE PARTS 56170D 63302A WTT021 WSZ002 -6-7-...

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