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Summary of Contents for LG MS-1145KYL
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Page 1: Microwave Oven
Website http://biz.lgservice.com MICROWAVE OVEN SERVICE MANUAL MODEL: MS-1145KYL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. September, 2005 P/NO : MFL31039201 Printed in Korea... -
Page 2: 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 3: Table Of Contents
CONTENTS (Page) SAFETY PRECAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Inside front cover SPECIFICATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-1 CAUTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-1 INSTALLATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1... -
Page 4: Specifications
SPECIFICATIONS ITEM DESCRIPTION Model MS-1145KYL Power Requirement 120 Volts AC 60 Hz 1500 Watts Single phase, 3 wire grounded Power Output 1100 Watts full microwave power (IEC60705) Microwave Frequency 2450 MHz Magnetron 2M246 - 050GF Timer 0 ~ 9 min. 99 sec. -
Page 5: 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 6: Installations
INSTALLATIONS BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY. INSTALLING EARTHING INSTRUCTIONS 1. Empty the microwave oven and clean inside it with This microwave oven is designed to be used in a fully a soft, damp cloth. Check for damage such as earthed condition. -
Page 7: Operating Instructions
OPERATING INSTRUCTIONS FEATURES Oven Front Plate Window Door Screen Door Seal Display Window Control Panel Safety Door Lock System Turntable Roller rest CONTROL PANEL 1. INDICATORS 2. CONTROL DE UN TOQUE 3. AUTO DEFROST: Used to select the desired auto weight defrost programmed with weight pad. -
Page 8: Operating Sequence
OPERATING SEQUENCE The following is a description of component functions 5.MULTI-STAGE COOKING during oven operation. 1ST STAGE 1. SETTING THE CLOCK TIME NUMBER Parar/Borar PODER PARAR/BORAR RELOJ NUMBER RELOJ NUMBER ex.) To set 4:30,touch number key [4 ],[3 ], and [0 ]. 2ND STAGE NOTE: 1) This is a 12 hour clock. -
Page 9: Schematic Diagram
SCHEMATIC DIAGRAM... -
Page 10: Circuit Description
CIRCUIT DESCRIPTION • A high voltage of approximately 2100 volts AC is GENERAL DETAILS generated in the secondary of the high voltage • The low voltage transformer supplies the necessary transformer which is increased by the action of the high voltage to the micom controller when power cord is voltage diode and charging of the high voltage plugged in. -
Page 11: Service Information
SERVICE INFORMATION TOOLS AND MEASURING INSTRUMENTS NECESSARY MEASURING INSTRUMENTS NECESSARY TOOLS Tools normally used for TV servicing are sufficient. • TESTER (VOLTS-DC, AC, Ohmmeter) • Microwave survey meter Standard tools are listed below. - Holaday HI-1500 • Diagonal pliers HI-1501 •... - Page 12 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.
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Page 13: 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 ±... -
Page 14: Diode Removal
D. DOOR ASSEMBLY / REMOVAL E. HIGH VOLTAGE TRANSFORMER REMOVAL 1) Open the door. 2) Remove the protector very carefully with a flat- 1) Discharge the high voltage capacitor. blade screwdriver. 2) Disconnect the leadwire from magnetron, high voltage CAUTION : Be careful not to damage door seal plate transformer, and capacitor. - Page 15 H. AIR DUCT ASSEMBLY / REMOVAL J. REMOVING THE TURNTABLE MOTOR 1) Remove the turntable. 1) Disconnect the leadwire from lamp. 2) Remove the turntable shaft VERY CAREFULLY 2) Remove the mounting screw to Latch Board. with a slotted screwdriver. 3) Lay the unit down on its back.
- Page 16 K. PCB ASSEMBLY REMOVAL L. INTERLOCK SYSTEM 1) Remove the control panel assembly from the 1) INTERLOCK MECHANISM cavity. (Refer to control panel assembly removal The door lock mechanism is a device which has on previous page.) been specially designed to eliminate microwave 2) Remove screws which hold the PCB SUB ASS’Y to activity when the door is opened during cooking the control panel.
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Page 17: 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 FOR PRIMARY SWITCH TYPE NO.SZM-V 16-FA-62 OR VP-532A-OF FOR MONITOR SWITCH TYPE NO.SZM-V 16-FA-63 OR VP-533A-OF FOR SECONDARY SWITCH A. -
Page 18: 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 19 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 20 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 Relay 1 10 sec 12 sec 12 sec...
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Page 21: 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 22 (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 23 (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 24 (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 25 (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.
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Page 26: Exploded View
#EV# EXPLODED VIEW INTRODUCTION MODEL: MS-1145KYL OVEN CAVITY PARTS INTERIOR PARTS BASE PLATE PARTS DOOR PARTS LATCH BOARD PARTS CONTROL PANEL PARTS... -
Page 27: Door Parts
#EV# DOOR PARTS 13581A 13536A 13552A 13213A 14890A 13551A 14026A 14970A WTT028 13650A... -
Page 28: Controller Parts
#EV# CONTROLLER PARTS 24781M 268711 23551A WTT028... -
Page 29: Oven Cavity Parts
#EV# OVEN CAVITY PARTS 33112U WTT021 33052A WTT010 33390G 35889A 36549S WTP013... -
Page 30: Latch Board Parts
#EV# LATCH BOARD PARTS 43500A 466001 43501A 466003 466001 WSZ085... -
Page 31: Interior Parts
#EV# INTERIOR PARTS WSZ002 568771 56411A 948502 56930V 50FZZA 948502 56201A WTT028 56549F WEB001 55900A WTT037 54974S WSZ002 56912B 56851D 54980A WEB001 50CZZH 948501 55262A WEB001 54810C 948503 56324A... -
Page 32: Base Plate Parts
#EV# BASE PLATE PARTS 56170D 63302A WTT021 WSZ002... -
Page 33: Replacement Parts List
REPLACEMENT PARTS LIST Rev.1 May 03, 2006 LOC. PART NO. DESCRIPTION ALTERNATE 3828W5A8445 Manual,Owners MFL31039201 Manual,Service MAY30330201 Box,Color 13213A 3213W0A012A Frame Assembly,Door 13536A 3536W1A003E Tape,Sealing 13551A 383EW1A112A Parts Assembly 13552A 3552W0A017A Cover,Choke 13581A 3581W0A127J Door Assembly 13650A 3650W1A156B Handle,Door 14026A 4026W1A036A Locker 14890A... - Page 34 LOC. PART NO. DESCRIPTION ALTERNATE WSZ002 1SBF0402418 Screw,Taptite WSZ085 4B70188C Screw,Customzied WTP013 1TPL0402418 Screw,Tapping WTT010 1TTG0402422 Screw,Tapping WTT021 1TTL0402418 Screw,Tapping WTT028 1TTL0402818 Screw,Tapping WTT037 1TTL0403818 Screw,Tapping R : SERVICE PARTS...
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