LG SolarDOM MP-9486SC Service Manual
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LG SolarDOM MP-9486SC Service Manual

Light oven “solardom”
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Website: http://biz.lgservice.com
LIGHT OVEN "SolarDOM"
SERVICE MANUAL
MODEL: MP-9486SC
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
February, 2006
P/NO : 382885S5381
Printed in Korea

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  • Page 1 Website: http://biz.lgservice.com LIGHT OVEN “SolarDOM” SERVICE MANUAL MODEL: MP-9486SC CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. February, 2006 P/NO : 382885S5381 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 MP-9486SC Power Requirement 230 Volts AC 50 Hz Single phase, 3 wire grounded Microwave 1650W Grill Max 2100W Combination Max 2800W Convection 1900W Power Output 900 Watts full microwave power (IEC60705) Microwave Frequency 2450 MHz Magnetron...

  • 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 oven and clean inside it with a soft, This oven is designed to be used in a fully earthed damp cloth. Check for damage such as misaligned condition.

  • Page 7: Operating Instructions

    OPERATING INSTRUCTIONS FEATURES Steamer Oven Front Plate Control Panel Deco. Window Door Screen Control Panel Door Frame STEAM COVER Choke Cover STEAM PLATE Safety Door Lock System STEAM WATER BOWL (Crispy Tray) HIGH Rack LOW Rack Metal Tray CONTROL PANEL 1.

  • Page 8: Operating Sequence

    OPERATING SEQUENCE The following is a description of component functions 6. SPEEDCOMBI COOKING during oven operation. *Speed Combi Categories Grill-1 + Microwave Power Level Co-1 1. SETTING THE CLOCK Grill-2 + Microwave Power Level Co-2 Turn Dial Grill-3 + Microwave Power Level Co-3 Stop/Clear Clock...

  • Page 9: Schematic Diagram

    SCHEMATIC DIAGRAM...

  • Page 10: Circuit Description

    CIRCUIT DESCRIPTION GENERAL DETAILS power of oven as POWER LEVEL. (refer to page 1-1) • 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 the oven supplied at its rated voltage and operated from the following formula : at its maximum microwave power setting with a load 4187 x (∆T) + 0.55 X (T )X M...
  • Page 14 D. DOOR 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. FAN MOTOR ASSEMBLY / REMOVAL J. REMOVING THE TURNTABLE MOTOR 1) Remove controller assembly, air-guide, power cord, 1) Remove the metal tray. latch board-R from upper. 2) Remove the turntable shaft VERY CAREFULLY. 2) Disconnect the leadwire from fan motor, latch board-R 3) Lay the unit down on its back.
  • Page 16 K. C-MOTOR, THERMISTOR REMOVAL PCB Bracket PCB Sub (Main) 1) Remove air-guide and controller assembly upper. PCB Holder 2) Disconnect the leadwire from the circulation motor PCB Sub terminal and oven thermostat. (Tact S/W) 3) Remove the screws of the thermistor, guide assy- Control Panel chamber and lift up the guide assy-chamber.
  • 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. 2) Disconnect the leadwire from the sheath heater 3) Remove the nuts from the oven cavity of the side.

  • 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 A.

  • 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 H.V. FUSE 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 Disconnect the 4 pin Check for P.C.B. connector. Cooking Start connector from P.C.B. (Refer to schemetic diagram) 1 2 3 4 RELAY OF P.C.B. Cooking Start (Wire leads removed.) Note: Relay Relay 1: Fan motor Circulation motor Relay 2: Oven lamp Turntable motor Relay 3: P.T.C Relay...
  • Page 23 COMPONENTS TEST PROCEDURE RESULTS CIRCULATION MOTOR Measure the resistance. Normal : Approx.165 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 Replace primary Malfunction of the Check continuity 1. Fuse blows. Continuity. and monitor monitor switch. 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 Check continuity 1.Setting time does No continuity. secondary switch secondary switch of secondary not count down...
  • Page 28 (TROUBLE 5) No microwave oscillation even though oven lamp and fan motor run (Display operates properly) CONDITION CHECK RESULT CAUSE REMEDY Defective P.C.B No microwave Disconnect the Replace P.C.B No continuity. oscillation. wire leads from assembly assembly 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 Output is full when Defective P.C.B. Replace P.C.B. Disconnect the Abnormal. you set lower assembly. assembly. wire leads from power level.

  • Page 30: Exploded View

    #EV# EXPLODED VIEW INTRODUCTION MODEL: MP-9486SC INTERIOR PARTS CONTROL PANEL PARTS OVEN CAVITY PARTS BASE PLATE PARTS LATCH BOARD PARTS DOOR PARTS...

  • Page 31: Door Parts

    #EV# DOOR PARTS 13581A 13552A 13213E WPZ016 WTP002 140262 14970A 140261 WPZ016 WMP022 14970A 13551A 14980A 13650A...
  • Page 32 #EV# CONTROL PANEL PARTS WTT028 268711 WTT028 24781M 24810P WTP004 24980A WTP004 268712 WTP004 249401 250201 24402A 268713 23551A 250201...
  • Page 33 #EV# OVEN CAVITY PARTS 35026C WTT021 33112U 35026G 33390M WNZ015 WTT010 33052M 33651A AGM30274606 34810H 34370T 33550S 343501 35026S 368771 33390C 35300S 36549S WTP013 63302A 54790A WTT028 647781 WTT028 647781 63303A WTT028...
  • Page 34 #EV# LATCH BOARD PARTS WSZ085 WSZ085 43501L 43501R 466001 43500R 466001 43500L 466003 44510A...
  • Page 35 #EV# INTERIOR PARTS (I) WTT028 WTT028 53504A 55264A 35300E 56201B 53550L 56324A 56912B WSZ002 WTT021 34890C WSZ085 WTT028 552652 35012A WTT021 WSZ085 552651...
  • Page 36 #EV# INTERIOR PARTS (II) WTT021 54811A WTP002 54975A WTT021 56930V 56901A WSZ002 948501 56170D WSZ002 WTT028 WTP002 WSZ002 54980A 56201A 56930M WNH002 WTT021 WTT028 55012E WSZ002 50FZZA 56411A 50CZZH 54810C 36549W 56322A 56851D 36549C 568771...

  • Page 37: Replacement Parts List

    REPLACEMENT PARTS LIST Rev.1 Feb 03, 2006 LOC. PART NO. DESCRIPTION ALTERNATE 382885A0001 MANUAL,OWNERS 382885S5381 MANUAL,SERVICE 387885A0143 COOK BOOK 389083L001A BOX,LABEL 13213E 383EW1A055B SERVICE PARTS 13551A 383EW1A095A SERVICE PARTS 383EW0A033A 13552A 3552W0A008A CHOKE COVER 13581A 3581W0A141X DOOR ASSEMBLY 13650A 3650W1A118C HANDLE,DOOR 3650W1A118B 140261...
  • Page 38 LOC. PART NO. DESCRIPTION ALTERNATE 50CZZH 0CZZW1H004S CAPACITOR,DRAWING[HIGH VOLTAGE] 50FZZA 3B74133N FUSE,DRAWING 3B70856K 53504A 3504W1A002A CHAMBER 53550L 3550W1A130A COVER,LAMP 54790A 4790W1A005A BARRIER 54810C 4810WRC002A BRACKET,CAPACITOR 54811A 4811W1A022A BRACKET ASSEMBLY 54975A 4975W1C003E GUIDE ASSEMBLY,AIR 54980A 4980W1A033A SUPPORTER 55012E 383EW1A065A SERVICE PARTS 55264A 5264W1A019A AIR TUNNEL...

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