LG MP-9483SL Service Manual
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LG MP-9483SL Service Manual

LG MP-9483SL Service Manual

Light oven “solardom”
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삼
흥
정
판
LIGHT OVEN "SolarDOM"
SERVICE MANUAL
MODEL: MP-9483SL
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : 3828W5S6150
MP-1283SL
Website: http://biz.lgservice.com
April, 2005
Printed in Korea

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  • Page 1 삼 흥 정 판 Website: http://biz.lgservice.com LIGHT OVEN “SolarDOM” SERVICE MANUAL MODEL: MP-9483SL MP-1283SL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. April, 2005 P/NO : 3828W5S6150 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 MP-9483SL / MP-1283SL MODEL Power Requirement 120 Volts AC 60 Hz Single phase, 3 wire grounded Microwave 1550W Grill Max 1300W Convection 1680W Power Output 900 Watts full microwave power (IEC60705) Microwave Frequency 2450 MHz 2M214 -240GP...

  • 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 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 7: Operating Instructions

    OPERATING INSTRUCTIONS FEATURES HIGH Rack Oven Front Plate Control Panel Deco. Window Door Screen Control Panel Door Frame LOW Rack Choke Cover Safety Door Lock System Metal Tray CONTROL PANEL 1. Display Window: You can show time of day, cooking time, power 9.

  • Page 8: Operating Sequence

    OPERATING SEQUENCE 6. SPEED COMBI COOKING The following is a description of component functions during oven operation. *Speed combi Categories 1. SETTING THE CLOCK Turn Dial Stop/Clear Clock Desired Enter hour Grill & Convection & Speed Combi Turn Dial Desired Enter Turn Dial minute...

  • Page 9: Schematic Diagram

    SCHEMATIC DIAGRAM...

  • Page 10: Circuit Description

    CIRCUIT DESCRIPTION power of oven as POWER LEVEL. (refer to page 1-1) GENERAL DETAILS • One complete cycle of relay 4 is 32 seconds. • The low voltage transformer supplies the necessary voltage to the micom controller when power cord is WHEN THE DOOR IS OPENED DURING plugged in.

  • Page 11: 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 • Diagonal pliers - Holaday HI-1500 • Long nose pliers HI-1501 •...

  • Page 12: Record Keeping And Notification After Measurement

    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 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 from the following formula : the oven supplied at its rated voltage and operated at its maximum microwave power setting with a load 4187 X (∆T) + 0.55 X (T ) X M of (1000 ±...
  • Page 14 D. DOOR GROSS ASSEMBLY REMOVAL F. AIR GUIDE ASSEMBLY REMOVAL 1) Disconnect power. 1) Remove the screw on the Bracket upper and lift out 2) Open the door from oven. insert “JIG ” into the choke the Bracket upper. cover hole of door. 2) Remove the mounting screw from magnetron, 3) Lift the door from front cavity.
  • Page 15 H. VENT MOTOR ASSEMBLY REMOVAL J. REMOVING THE TURNTABLE MOTOR 1) Remove the metal tray. 1) Remove controller assembly, air-guide, power cord, 2) Remove the turntable shaft VERY CAREFULLY. latch board-R from upper. 3) Lay the unit down on its back. 2) Disconnect the leadwire from fan motor, latch board- 4) Remove the turntable motor cover.
  • Page 16 K. C-MOTOR, THERMISTOR REMOVAL 1) Remove air-guide and controller assembly upper. 2) Disconnect the leadwire from the circulation motor terminal and oven thermostat. 3) Remove the screws of the thermistor, guide assy- chamber and lift up the guide assy-chamber. 4) Remove a hex nut securing the circulation fan to shaft of the C-motor.
  • Page 17 N. UPPER HEATER REMOVAL O. LOWER HEATER REMOVAL 1) Remove the screw securing the air-guide to the 1) Disconnect the leadwire from the sheath heater. upper. 2) Remove the base plate from cavity. 3) Remove the nuts from the oven cavity of the side. 2) Disconnect the leadwire from the sheath heater 4) Remove the Gasket, Ring and Heater Bracket.

  • Page 18: 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 B.

  • Page 19: 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 20: Test Procedure

    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 then...
  • Page 21 COMPONENTS TEST PROCEDURE RESULTS FUSE Check for continuity of the fuse with an Normal Abnormal multi-meter. NOTE: If the fuse is blown, check the primary, the secondary, and the monitor switches, H.V.D. and H.V.C. before replacing the fuse. If the fuse is blown by improper switch operation replace the defective switch and the fuse at the same time.
  • Page 22 COMPONENTS TEST PROCEDURE RESULTS Cooking Start Disconnect the 5 pin Check for P.C.B.connector. connector from P.C.B. (Refer to schematic diagram) Cooking Start RELAY OF P.C.B. (Wire leads removed.) Note: Relay Relay 1: Fan motor Circulation motor Relay 2: Oven lamp Turntable motor Relay 3: P.T.C Relay (Positive...
  • Page 23 COMPONENTS TEST PROCEDURE RESULTS CIRCULATION MOTOR Measure the resistance. Normal : Approx. 48.5 ohm. (Wire leads removed) (Multi-meter scale: R x 1) Abnormal : Infinite or several ohm. Check continuity between switch KEY PCB Key P.C.B. Main P.C.B terminals, by pressing an appropriate pad on key board.

  • Page 24: 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 OVEN. THIS CAN ELIMINATE AN UNNECESSARY SERVICE CALL. CAUTIONS 1. Check grounding before checking for trouble. 2.
  • Page 25 (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 26 (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 primary Check continuity 1. Fuse blows. Continuity. monitor switch. and monitor of monitor switches.
  • Page 27 (TROUBLE 3) Display shows all figures set, but oven does not start cooking while desired program times are set and START button is touched. CONDITION CHECK RESULT CAUSE REMEDY Defective Replace 1.Setting time does Check continuity No continuity. secondary switch secondary switch not count down of secondary...
  • Page 28 (TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run. (Display operates properly) CONDITION CHECK RESULT CAUSE REMEDY No microwave Defective P.C.B Replace P.C.B Disconnect the No continuity. oscillation. assembly. assembly. wire leads from relay 4 and check continuity Continuity.
  • Page 29 (TROUBLE 6) Oven does not cook properly when programmed for the set power level (Operates properly on HIGH) CONDITION CHECK RESULT CAUSE REMEDY Defective P.C.B Replace P.C.B Output is full when Disconnect the Abnormal. assembly. assembly. you set lower wire leads from power level.

  • Page 30: Exploded View

    #EV# EXPLODED VIEW INTRODUCTION MODEL: MP-9483SL MP-1283SL INTERIOR PARTS CONTROL PANEL PARTS OVEN CAVITY PARTS BASE PLATE PARTS LATCH BOARD PARTS DOOR PARTS...

  • Page 31: Door Parts

    #EV# DOOR PARTS 13552A 13581A 13213E WPZ016 WTP002 140262 14970A 140261 WPZ016 WMP022 14970A 13551A 14980A 13650A...
  • Page 32 #EV# CONTROL PANEL PARTS WTT028 24781S 24810P • discard original & replace with Part Supplied in Kit - Must Change Simultaneously WTP004 - Original P/No : (6871W1S074C) (6871W1S260U) 24980A (6871W1S112B) 268711 WTT028 WTP004 268712 WTP004 250201 249401 24402A 268713 23551A 250201...
  • Page 33 #EV# OVEN CAVITY PARTS • discard original & replace with Part Supplied in Kit (Tray & Shaft) Before 35026C 33112U WTT021 35026G P/NO : 3390W1A013B 4370W1A004B After 33390M 34370T WNZ015 WTT010 33052M 34810H 343501 368771 WNZ015 35300S 36549S WTP013 63302A 54790A WTT028 647781...
  • Page 34 #EV# LATCH BOARD PARTS WSZ085 WSZ085 43501L 43501R 466001 43500R 466001 43500L 466003 44510A...

  • Page 35: Interior Parts

    #EV# INTERIOR PARTS WTT028 WTT028 53504A 35264A 35300E 53550L 56324A 56912B WSZ002 WTT021 34890C WSZ209 WTT028 552652 350122 WTT021 WSZ209 552651...
  • Page 36 #EV# BASE PLATE PARTS WTP002 54975A WTT021 56930V WSZ002 55012E WTT021 WSZ002 56170D WTP002 54980A 56201A 56930M 56549F WTT028 56322A 50FZZA 56411A 350121 50CZZH 54810C 33660A 36549W WMP021 56851D 55900A WWS005 WWP008 WNH003 568771...
  • Page 37 -41-...

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