LG MS2647GR Service Manual
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LG MS2647GR Service Manual

LG MS2647GR Service Manual

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MICROWAVE OVEN

SERVICE MANUAL
MODEL: MS2647GR
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL31039006
MS2647GRS
Internal Use Only
Website http://biz.lgservice.com
July, 2007
Printed in Korea

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Summary of Contents for LG MS2647GR

  • Page 1: Microwave Oven

    Internal Use Only Website http://biz.lgservice.com MICROWAVE OVEN SERVICE MANUAL MODEL: MS2647GR MS2647GRS CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. July, 2007 P/NO : MFL31039006 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. STOP/CLEAR: Used to stop over and clear all entries except time of day. 11. START/Q-START: One tap allows over to begin functioning. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: Operating Sequence

    • Touch the Stop pad • Touch STOP pad L disappears. 4. Q-START Stop Q-Start 5. MICROWAVE COOKING Stop Power 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 MICOM CONTROLLER the magnetron to heat the magnetron filament through two noise-preventing choke coils. 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 .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: Diode Removal

    2) Disconnect the leadwire from magnetron, high voltage transformer, and capacitor. 3) Remove the screw holding the high voltage transformer to the baseplate. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 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 CAUTION: CHECK THE CORRECT POSITION FIG. 1 MAGNETRON H.V. TRANSFORMER H.V. DIODE H.V. CAPACITOR PRIMARY CIRCUIT PROTECTOR 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 Normal: ∞ resistance in both direction. Measure the continuity (Reverse). Abnormal: Continuity. (Ohm-meter scale: Rx10000) 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

    INTRODUCTION MODEL: MS2647GR MS2647GRS OVEN CAVITY PARTS INTERIOR PARTS BASE PLATE PARTS DOOR PARTS LATCH BOARD PARTS CONTROL PANEL PARTS LGE Internal Use Only -6-1- Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 28: Door Parts

    #EV# DOOR PARTS 15006A 13581A 13552A 13536A 13213A 14890A 13720D 14026A 14970A Copyright © 2007 LG Electronics. Inc. All right reserved. -6-2- LGE Internal Use Only Only for training and service purposes...

  • Page 29: Control Panel Parts

    #EV# CONTROL PANEL PARTS 24781M 23790D 23572A 268711 WTP018 23506A 24510L 24970A 250201 LGE Internal Use Only -6-3- Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 30: Oven Cavity Parts

    #EV# OVEN CAVITY PARTS 33112U WTT021 WTT010 33052A 33390G 34370T 36549S 35889A WTP013 Copyright © 2007 LG Electronics. Inc. All right reserved. -6-4- LGE Internal Use Only Only for training and service purposes...
  • Page 31 #EV# LATCH BOARD PARTS WSZ085 43501A 43500A 466001 466003 466001 LGE Internal Use Only -6-5- Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 56201A WTT028 56549F 54974S WEB001 55900A WTT037 50CZZH WSZ002 56912B 56901A 34930W WEB001 948501 54810C 56851D 55262A WTT028 56324A WSZ002 Copyright © 2007 LG Electronics. Inc. All right reserved. -6-6- LGE Internal Use Only Only for training and service purposes...
  • Page 33 #EV# BASE PLATE PARTS 56170D 63302A 63303A 647781 WSZ002 WTT030 WTT021 LGE Internal Use Only -6-7- Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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