LG MS2349H Service Manual
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LG MS2349H Service Manual

LG MS2349H Service Manual

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삼
흥
정
판
MICROWAVE OVEN
SERVICE MANUAL
MODEL: MS2349H
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL30190715
Internal Use Only
Website: http://biz.lgservice.com
March, 2010
Printed in Korea

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  • Page 1 삼 흥 정 판 Internal Use Only Website: http://biz.lgservice.com MICROWAVE OVEN SERVICE MANUAL MODEL: MS2349H CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. March, 2010 P/NO : MFL30190715 Printed in Korea...

  • Page 2: 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 3: 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 4: Specifications

    Owner's manual Glass turntable Rotating ring 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 5: 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 6: Installations

    The wire which is colored brown must be connected to the terminal in the plug which is marked with the letter L or colored red. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 7: Operating Instructions

    10. MORE/LESS: Used to change cooking time. WEIGHT: Used to select the weight of food. 11. START/Q-START: To quickly set the cooking time directly. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: Operating Sequence

    STOP/ MICRO TIME START NUMBER OF CLEAR STOP/ QUICK WEIGHT START DEFROST CLEAR (kg) 2ND STAGE MICRO TIME MICRO TIME START Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Schematic Diagram

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

  • Page 10: Circuit Description

    This 3.2 volts is applied to the magnetron to heat the magnetron filament through SECONDARY RELAY 2 SWITCH 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 11: Service Information

    5 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 12 5 mW/cm.sq. Leakage for a fully assembled 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 13: Measurement Of Microwave Power Output

    2) Disconnect two terminals, and remove one screw of the earth terminal. 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 14 4) Remove the screw holding the high voltage capacitor bracket. Fan Motor ASS Y Suction Guide Remove door assembly H.V. H.V. Capacitor Transformer H.V. Diode Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 Lamp Air Duct 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 16 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 17: 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 18: Component Test Procedure

    Normal: Less than 1 Ω • Between Filament terminal 2. Measure the resistance. (Ohm-meter scale: Rx1000) Normal: ∞ • Filament to chassis Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 Some inexpensive meters may indicate infinite resistance in both direction. Normal: ∞ Measure the continuity (Reverse). (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 20 • 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 21: Trouble Shooting

    2. Use plastic wrap or lid. characteristics. 3. Stir once or twice while 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 22 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 23 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 24 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 25 Check high vol- Defective high Replace high Abnormal tage diode. voltage diode. voltage diode. Normal Check Defective Replace Abnormal magnetron. magnetron. magnetron. LGE Internal Use Only 5-15 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 26 • When Removing the wire leads from the parts, be sure to grasp the connector, not the wires. • When removing the magnetron, be sure to install the magnetron gasket in the correct position and in good condition. Copyright © 2007 LG Electronics. Inc. All right reserved. 5-16 LGE Internal Use Only...

  • 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 MAY000 MFL552 -6-1-...
  • Page 28 #EV# DOOR PARTS 13581A 13536A 13552A 13213A 14890A 13720D 14026A 14970A -6-2-...
  • Page 29 #EV# CONTROL PANEL PARTS 24781M 23572A 268711 23506A WTP013 -6-3-...
  • Page 30 #EV# OVEN CAVITY PARTS WTT021 33112U 33052A 33390G 36549S 34370T 35889A WTP013 -6-4-...
  • Page 31 #EV# LATCH BOARD PARTS WSZ085 466001 43500A 43501A 466003 466001 44510A -6-5-...
  • Page 32 #EV# INTERIOR PARTS 568771 WSZ062 56411A 56930V 50FZZA 56201A WTT028 56549F WSZ002 55900A WTT037 54974S 56912B 50CZZH 948501 WSZ002 55262A WSZ002 56851D 34930W 56901A 54810C WTT028 56324A WSZ002 -6-6-...
  • Page 33 #EV# BASE PLATE PARTS 56170D 63302A 63303A WTT021 65006B WSZ002 -6-7-...

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