LG LSRM205ST Service Manual
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LG LSRM205ST Service Manual

LG LSRM205ST Service Manual

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This Owner's Manual is provided and hosted by Appliance Factory Parts.
LG LSRM205ST
Owner's Manual
Shop genuine replacement parts for LG LSRM205ST
Find Your LG Microwave Parts - Select From 955 Models
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Summary of Contents for LG LSRM205ST

  • Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. LG LSRM205ST Owner's Manual Shop genuine replacement parts for LG LSRM205ST 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: LSRM205ST CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. April, 2010 P/NO : MFL06272515 Printed in Korea...

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS This device is to be serviced only by properly qualified service personnel. Consult the service manual for proper service procedures to assure continued safety operation and for precautions to be taken to avoid possible exposure to excessive microwave energy. PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY...

  • Page 4: Table Of Contents

    CONTENTS (Page) SAFETY PRECAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Inside front cover SPECIFICATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-1 CAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-1 INSTALLATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1...

  • Page 5: Specifications

    SPECIFICATIONS ITEM DESCRIPTION Model LSRM205ST Power Requirement 120 V~ 60 Hz 1600 Watt (14.0 A) Single phase, 3 wire grounded Power Output 1200 Watt full microwave power (IEC60705) Microwave Frequency 2450 MHz Magnetron 2M246 - 050GF Timer 0 ~ 9 min. 99 sec.

  • Page 6: Cautions

    CAUTIONS Unlike other appliances, the microwave oven is MICROWAVE RADIATION high-voltage and high-current equipment. Personnel should not be exposed to the Though it is free from danger in ordinary use, microwave energy which may radiate from the extreme care should be taken during repair. magnetron or other microwave generating device if it is improperly used or connection.

  • Page 7: Installations

    INSTALLATIONS BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY. INSTALLING GROUNDING INSTRUCTIONS 1. Empty the microwave oven and clean inside it with For personal safety,this appliance must be fully a soft, damp cloth. Check for damage such as grounded at all times.

  • Page 8: Operating Instructions

    OPERATING INSTRUCTIONS FEATURES CONTROL PANEL 1. DISPLAY : The display includes a clock and indicators that tell you time of day, cooking time settings, and cooking functions selected. 2. SENSOR TOUCH : This pad allows you to cook most of your favorite foods without having to select cooking times and power levels.

  • Page 9: Operating Sequence

    OPERATING SEQUENCE 7. CHILD LOCK The following is a description of component functions during oven operation. This oven has a CHILD LOCK feature TO SET CHILD LOCK 1. CANCEL FUNCTION STOP/CLEAR • Touch Touch the pad whenever you need to STOP/CLEAR •...

  • Page 10: Schematic Diagram (Ii)

    SCHEMATIC DIAGRAM...

  • Page 11: Circuit Description

    CIRCUIT DESCRIPTION GENERAL DETAILS • A high voltage of approximately 2100 volts AC is • The low voltage transformer supplies the necessary generated in the secondary of the high voltage voltage to the micom controller when power cord is transformer which is increased by the action of the high plugged in.

  • Page 12: Service Information

    SERVICE INFORMATION TOOLS AND MEASURING INSTRUMENTS NECESSARY TOOLS NECESSARY MEASURING INSTRUMENTS Tools normally used for TV servicing are sufficient. • TESTER (VOLTS-DC, AC, Ohmmeter) Standard tools are listed below. • Microwave survey meter - Holaday HI-1500 • Diagonal pliers HI-1501 •...

  • Page 13: Measurement With Outer Case Removed

    MEASUREMENT WITH OUTER CASE NOTES WHEN MEASURING REMOVED • Do not exceed meter full scale deflection. • The test probe must be removed no faster than • When you replace the magnetron, measure for 1 inch/sec (2.5 cm/sec) along the shaded area, microwave energy leakage before the outer case is otherwise a false reading may result.

  • Page 14: Measurement Of Microwave Power Output

    MEASUREMENT OF MICROWAVE POWER OUTPUT • Microwave power output measurement is made with • The microwave power output P in watts is calculated the microwave oven supplied at its rated voltage and from the following formula : operated at its maximum microwave power setting with 4187 x (∆T) + 0.55 X (T ) X M a load of (1000±5) g of potable water.

  • Page 15: Pcb Assembly Removal

    D. PCB ASSEMBLY REMOVAL Remove choke cover 1) Remove the control panel assembly from the cavity. (Refer to control panel assembly removal on previous page.) 2) Remove screws which hold the PCB SUB ASS’Y to the control panel. 3) Disconnect the flat cable from the PCB SUB ASS’Y and take off the PCB SUB ASS’Y Remove door Assembly E.

  • Page 16: Removing Sensor

    F. AIR DUCT ASSEMBLY / REMOVAL G. REMOVING SENSOR 1) Disconnect the leadwire from PCB Assembly. 1) Disconnect the leadwire from lamp. 2) Remove a screw securing the sensor duct. 2) Remove the mounting screw to the magnetron. G. MAGNETRON REMOVAL 1) Disconnect the leadwire from themagnetron.

  • Page 17: Removing The Turntable Motor

    H. REMOVING THE TURNTABLE MOTOR I. HIGH VOLTAGE TRANSFORMER 1) Remove the turntable and rotating ring. REMOVAL 2) Lay the unit down on its back. 1) Discharge the high voltage capacitor. 3) Remove the turntable motor cover. 2) Disconnect the leadwire from magnetron, high voltage The turntable base cover is easily removed by transformer, and capacitor.
  • Page 18 L. INTERLOCK SYSTEM 1) INTERLOCK MECHANISM The door lock mechanism is a device which has been specially designed to eliminate completely microwave activity when the door is opened during cooking and thus to prevent the danger resulting from the microwave leakage. ADJUSTMENT DIRECTION PRIMARY...

  • Page 19: Interlock Continuity Test

    INTERLOCK CONTINUITY TEST WARNING : FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS. TYPE NO.SZM-V 16-FA-63 OR VP-533A-OF OR V-5230Q FOR PRIMARY SWITCH TYPE NO.SZM-V 16-FA-62 OR VP-532A-OF OR V-5220Q FOR MONITOR SWITCH TYPE NO.SZM-V 16-FA-63 OR VP-533A-OF OR V-5230Q FOR SECONDARY SWITCH A.

  • Page 20: Component Test Procedure

    COMPONENT TEST PROCEDURE CAUTIONS 1. DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE OUTER CASE FROM THE UNIT. PROCEED WITH THE TEST ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER.
  • Page 21 COMPONENTS TEST PROCEDURE RESULTS Antenna Gasket Chassis Filament NOTE: When testing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition. HIGH VOLTAGE Measure the resistance. Normal: Momentarily indicates CAPACITOR (Ohm-meter scale: Rx1000) several ohms, and...
  • Page 22 COMPONENTS TEST PROCEDURE RESULTS RELAY 2 Check for continuity of relay 2 with an POWER ohm-meter. LEVEL (Remove wire leads from relay 2 and operate the unit.) 4 sec 18 sec 6 sec 16 sec 8 sec 14 sec 10 sec 12 sec 12 sec 10 sec...

  • Page 23: Trouble Shooting

    TROUBLE SHOOTING WHEN YOU GET A COMPLAINT FROM YOUR CUSTOMER, EVALUATE THE COMPLAINT CAREFULLY. IF THE FOLLOWING SYMPTOMS APPLY, PLEASE INSTRUCT THE CUSTOMER IN THE PROPER USE OF THE MICROWAVE OVEN. THIS CAN ELIMINATE AN UNNECESSARY SERVICE CALL. CAUTIONS 1. Check grounding before checking for trouble. 2.
  • Page 24 (TROUBLE 1) The following visual conditions indicate a probable defective control circuit. 1. Incomplete segments. • Segment missing. • Partial segment missing. • Digit flickering (NOTE: Slight flickering is normal.) 2. Colon does not turn on or blink. 3. A distinct change in the brightness of one or more numbers in display. 4.
  • Page 25 (TROUBLE 2) Oven does not operate at all, Display window does not display any figures, and no input is accepted. CONDITION CHECK RESULT CAUSE REMEDY Malfunction of the Replace fuse, Check continuity 1. Fuse blows. Continuity. monitor switch. primary, monitor, of monitor secondary switch (with...
  • Page 26 (TROUBLE 3) Display shows all figures set, but oven does not start cooking while desired program times are set and START pad is touched. CONDITION CHECK RESULT CAUSE REMEDY Defective Replace Check continuity 1.Setting time No continuity. secondary switch. secondary switch. of secondary does not count switch (with...
  • Page 27 (TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run. (Display operates properly) CONDITION CHECK RESULT CAUSE REMEDY No microwave Defective PCB Replace PCB Disconnect the No continuity. oscillation. assembly assembly wire leads from relay 2 and check continuity Continuity.

  • Page 28: Exploded View

    #EV# EXPLODED VIEW INTRODUCTION MODEL: SENSOR PARTS OVEN CAVITY PARTS INTERIOR PARTS BASE PLATE PARTS DOOR PARTS LATCH BOARD PARTS CONTROL PANEL PARTS MAY000 MFL552 -6-1-...

  • Page 29: Door Parts

    #EV# DOOR PARTS 13581A 13552A 13536A 13213A 13551A 14026A 14970A -6-2-...

  • Page 30: Controller Parts

    #EV# CONTROLLER PARTS 24781M 23551A 268711 23550D WTP018 24510L 24970A 23551B -6-3-...

  • Page 31: Oven Cavity Parts

    #EV# OVEN CAVITY PARTS 33112U WSZ185 Button Head (Torx style 2) 33052A WTT 020 33390G 36549S 35889A WTP 013 -6-4-...

  • Page 32: Latch Board Parts

    #EV# LATCH BOARD PARTS WSZ 085 43501A 43500A WTT028 56912B 466001 55262A 466003 466001 -6-5-...

  • Page 33: Interior Parts

    #EV# INTERIOR PARTS 568771 WSZ002 56411A 50 FZZA 948501 56930V 34930W 56201A 56549F WTT028 54974S WEB001 55900A WTT037 35012A WSZ 002 50CZZH 54810C WTT028 WEB001 56324A 56851D WSZ 002 -6-6-...

  • Page 34: Base Plate Parts

    #EV# BASE PLATE PARTS 63303L 56170D 63302L 63303R 63302R WTT021 65006B WSZ002 65006B WTT028 -6-7-...

  • Page 35: Sensor Parts

    #EV# SENSOR PARTS WSZ002 WTP004 56501A 54974T -6-8-...

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