LG SolarDOM MP-1283SL Service Manual Download Page 33

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6-4

35026G

35026C

33390M

34370T

P/NO : 3390W1A013B

• discard original & replace with Part Supplied in Kit (Tray & Shaft)

Before

After

4370W1A004B

33112U

WTP013

36549S

63302A

WNZ015

35300S

WTT028

WTT010

WTT021

63303A

WTT028

647781

WTT028

647781

54790A

368771

33052M

34810H

343501

WNZ015

OVEN CAVITY PARTS

#EV#

Summary of Contents for SolarDOM MP-1283SL

Page 1: ... SolarDOM SERVICE MANUAL MODEL MP 9483SL MP 1283SL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL Website http biz lgservice com P NO 3828W5S6150 April 2005 Printed in Korea 삼 흥 정 판 ...

Page 2: ...r and other damage 4 damage to or loosening of hinges and latches 5 evidence of dropping or abuse C Before turning on microwave power for any service test or inspection within the microwave generating compartments check the magnetron wave guide or transmission line and cavity for proper alignment integrity and connections D Any defective or misadjusted components in the interlock monitor door seal...

Page 3: ...CE 4 2 SCHEMATIC DIAGRAM 4 3 CIRCUIT DESCRIPTION 4 4 SERVICE INFORMATION 5 1 TOOLS AND MEASURING INSTRUMENTS 5 1 MICROWAVE LEAKAGE TEST 5 1 MEASUREMENT OF MICROWAVE POWER OUTPUT 5 3 DISASSEMBLY AND ADJUSTMENT 5 3 UPPER LOWER HEATER 5 7 INTERLOCK CONTINUITY TEST 5 8 COMPONENT TEST PROCEDURE 5 9 TROUBLE SHOOTING 5 14 EXPLODED VIEW 6 1 REPLACEMENT PARTS LIST 7 1 CONTENTS ...

Page 4: ...90 min 527 W x 392 H x 480 D mm 440 W x 204 H x 420 D mm 28 kg 31 kg 1 Microwave Power level 3 Convection 40 C 100 230 C MAX 900W 600W 360W 180W 90W 2 GRILL 4 SPEED COMBI Upper Sheath Heater 1200W 5 SPEED AUTO COOK Owner s manual High rack Low rack Metal tray 1 1 ITEM MODEL Power Requirement Power Output Microwave Frequency Magnetron Timer Outside Dimensions Cavity Dimensions Net Weight Shipping w...

Page 5: ...tron be assembled to the waveguide and cavity Never operate the magnetron unless it is properly installed Be sure that the magnetron gasket is properly installed around the dome of the tube whenever installing the magnetron 2 1 CAUTIONS Unlike other appliances the microwave oven is high voltage and high current equipment Though it is free from danger in ordinary use extreme care should be taken du...

Page 6: ...ical parts of the unit Do not install the oven next to a conventional surface unit or above a conventional wall oven 5 Use microwave oven in an ambient temperature less than 104 F 40 C 6 Place the microwave oven on a sturdy and flat surface at least 10 cm 4 inches from the wall 7 Place the microwave oven as far away as possible from TV RADIO COMPUTER etc to prevent interference GROUNDING INSTRUCTI...

Page 7: ...gthen or shorten the cooking time at any point by turning the dial knob except defrost mode 9 Defrost You can select the food type and the weight of the food 10 Favorite The cooking program can be stored in the memory of your oven up to 9 modes FA 1 FA 9 11 Micro You can select five power level settings 12 Stop Clear You can stop over and clear all entries except time of day Press Stop Clear Butto...

Page 8: ...red cooking time Start Stop Clear Function Convection Enter Desired cooking time Start Turn Dial Desired convection temp 40 C 100 C 230 C Stop Clear Function Defrost Turn Dial Desired defrost category Enter Food weight Start Stop Clear Fuction Auto cook Turn Dial Desired auto cook category Enter Food weight Start Stop Clear Stop Clear Touch and Hold Stop Clear Stop Clear Touch and Hold Stop Clear ...

Page 9: ...SCHEMATIC DIAGRAM 4 3 ...

Page 10: ...00 Volts DC is applied to the filament of the magnetron WHEN THE OVEN IS SET AT ANY LEVEL EXCEPT MAXIMUM The micom controller controls the ON OFF time of relay 4 by the applied signal to vary the average output power of oven as POWER LEVEL refer to page 1 1 One complete cycle of relay 4 is 32 seconds WHEN THE DOOR IS OPENED DURING COOKING Both the primary switch and relay 4 are cut off primary win...

Page 11: ...is graduated to 600 cc and place the beaker on the center of the turntable Set the energy leakage monitor to 2450 MHz and use it following the manufacturer s recommended test procedure to assure correct result When measuring the leakage always use the 2 inch 5cm spacer supplied with the probe Operate the oven at its maximum output Measure the microwave radiation using and electromagnetic radiation...

Page 12: ...e test probe must be removed no faster than 1 inch sec 2 5 cm sec along the shaded area otherwise a false reading may result The test probe must be held with the grip portion of the handle A false reading may result if the operator s hand is between the handle and the probe When testing near a corner of the door keep the probe perpendicular to the surface making sure the probe horizontally along t...

Page 13: ...microwave power output P in watts is calculated from the following formula 4187 X T 0 55 X T2 T0 X M T T2 Temperature after heating T0 Temperature of bowl M Weight of bowl is measured while the microwave generator is operating at full power Magnetron filament heat up time is not included The water is stirred to equalize temperature throughout the vessel prior to measuring the final water temperatu...

Page 14: ...ator U F AIR GUIDE ASSEMBLY REMOVAL 1 Remove the screw on the Bracket upper and lift out the Bracket upper 2 Remove the mounting screw from magnetron upper chamber and front plate G MAGNETRON REMOVAL 1 Remove controller assembly Bracket upper and air guide from upper 2 Disconnect the leadwire from the high voltage choke filter transformer and Magnetron 3 Carefully remove the mounting screws holdin...

Page 15: ...h voltage diode earth screw J REMOVING THE TURNTABLE MOTOR 1 Remove the metal tray 2 Remove the turntable shaft VERY CAREFULLY 3 Lay the unit down on its back 4 Remove the turntable motor cover The turntable base cover is easily removed by pinching the six parts with a wire cutting 5 Disconnect the leadwire from the turntable motor terminals 6 Remove the screw securing the turntable motor to the o...

Page 16: ...lder 3 Remove the PCB holder PCB Bracket 4 Remove screws which hold the control panel 5 Disconnect the flat cable from the PCB SUB ASS Y and take off the PCB SUB ASS Y M 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 resultin...

Page 17: ... support F B to reflector 8 Remove the heater support F B of reflector 9 Disconnect the leadwire from ceramic heater 10 Remove the ceramic heater and halogen heater O LOWER HEATER REMOVAL 1 Disconnect the leadwire from the sheath heater 2 Remove the base plate from cavity 3 Remove the nuts from the oven cavity of the side 4 Remove the Gasket Ring and Heater Bracket 5 Remove the sheath heater in th...

Page 18: ... closed meter should indicate an closed circuit When the secondary switch operation is abnormal make the necessary adjustment or replace the switch only with the same type of switch C MONITOR SWITCH TEST Disconnect the wire lead from the monitor switch Connect the ohmmeter leads to the common COM and normally closed NC terminals of the switch The meter should indicate closed circuit in the door op...

Page 19: ...RESULTS HIGH VOLTAGE TRANSFORMER Wire leads removed MAGNETRON Wire leads removed 1 Measure the resistance Ohm meter scale Rx1 and Rx100 Primary winding Secondary winding Filament winding 2 Measure the resistance Ohm meter scale Rx1000 Primary winding to ground Filament winding to ground 1 Measure the resistance Ohm meter scale Rx1 Filament terminal 2 Measure the resistance Ohm meter scale Rx1000 F...

Page 20: ...0 Terminal to case Measure the continuity Forward Ohm meter scale Rx10000 Measure the continuity Reverse Ohm meter scale Rx10000 Normal Momentarily indicates several ohms and then gradually returns to infinite Normal Infinite Normal Continuity Abnormal Infinite Normal Infinite Abnormal Continuity NOTE When testing the magnetron be sure to install the magnetron gasket in the correct position and be...

Page 21: ...es operate normally Normal Abnormal HEATER ELEMENT Wire leads removed Measure the resistance Multi meter scale Rx1 Measure the resistance with 500V 100M ohm insulation resistance meter NOTE Make sure heater is fully cooled when tested Normal Upper sheath heater Approx 12 ohm 120V 1200W Lower sheath heater Approx 38 ohm 120V 375W Upper Ceramic heater Approx 27 ohm 120V 500W Upper Halogen heater App...

Page 22: ...ter FAN MOTOR Wire leads removed TURNTABLE MOTOR Wire leads removed Measure the resistance Ohm meter scale R x 1 Check for P C B connector Measure the resistance Ohm meter scale R x 1000 Normal Approx 14 0 ohm Abnormal Infinite or several ohm Normal Approx 2 3 kohm Abnormal Infinite or several ohm NOTE A MICROWAVE LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON MAKE ...

Page 23: ...ressing an appropriate pad on key board The contacts assignment of the respective pads on the key board is as shown left figures NOTE A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON MAKE SURE THE WIRE LEADS ARE CORRECT POSITION WHEN REMOVING THE WIRE LEAD FROM THE PARTS BE SURE TO GRASP THE CONNECTOR NOT THE WIRES 1 2 3 4 5 6 7 8 9 10 18 1 2 3 4 5 ...

Page 24: ...ng on this panel to discharge any static charge built up in your body CONDITION The oven does not work Inserting many plug into one plug outlet and using them at the same time causes overloading The oven plug is not inserted tightly Output power is too low Low AC input voltage Food temperature is too low Using metallic ware and allowing it to touch the oven wall Sparks occurring Inconsistent inten...

Page 25: ... input Defective PCB assembly Replace PCB assembly 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 One or more digits in the display are not...

Page 26: ...stat and Lower voltage transformer Check continuity of magnetron thermostat No continuity 1 Fuse blows Continuity Malfunction of the monitor switch Replace primary and monitor switches Check continuity of monitor switch with door closed Check continuity of primary switch with door opened No continuity Disconnect one side of the wire lead connected from transformer to the high voltage capacitor and...

Page 27: ...ntinuity Continuity Defective P C B assembly Replace P C B assembly Loose connection Connection then tightly Output is low Lower than 90 of rating voltage Normal Decrease in power source voltage with load Suggest customer contact local electric power utility co or qualified electrician Check the power source voltage Disconnect the wire leads from relay 4 and check on and off time with multitester ...

Page 28: ...l Defective high voltage transformer Replace high voltage transformer Check H V transformer Abnormal Defective high voltage capacitor Replace high voltage capacitor Check H V capacitor Abnormal Defective high voltage Diode Replace high voltage Diode Check H V diode normal Abnormal Defective magnetron Replace magnetron Check Magnetron normal TROUBLE 5 No microwave oscillation even though oven lamp ...

Page 29: ...E Make sure the wire leads correct position When removing the wire leads from 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 1 Heater is not operating Abnormal Normal Malfunction of the heater Replace Heater Abnormal Normal Malfunction of the thermostat and relay 5 6 7 Replace Ther...

Page 30: ...DOOR PARTS CONTROL PANEL PARTS BASE PLATE PARTS OVEN CAVITY PARTS LATCH BOARD PARTS INTERIOR PARTS 6 1 EXPLODED VIEW INTRODUCTION EV MODEL MP 9483SL MP 1283SL ...

Page 31: ...6 2 14970A 140262 WPZ016 14970A 140261 WPZ016 13551A 14980A 13650A 13581A 13213E 13552A WTP002 WMP022 DOOR PARTS EV ...

Page 32: ...h Part Supplied in Kit Must Change Simultaneously Original P No 6871W1S074C 6871W1S260U 6871W1S112B 24781S 268711 WTT028 WTP004 249401 24402A 250201 23551A 268712 250201 268713 WTP004 WTP004 24810P 24980A WTT028 CONTROL PANEL PARTS EV ...

Page 33: ...B discard original replace with Part Supplied in Kit Tray Shaft Before After 4370W1A004B 33112U WTP013 36549S 63302A WNZ015 35300S WTT028 WTT010 WTT021 63303A WTT028 647781 WTT028 647781 54790A 368771 33052M 34810H 343501 WNZ015 OVEN CAVITY PARTS EV ...

Page 34: ...6 5 466001 43501L 43500L 44510A 466003 466001 43500R 43501R WSZ085 WSZ085 LATCH BOARD PARTS EV ...

Page 35: ...6 6 350122 56324A WSZ002 53504A 35264A WTT028 WTT028 WSZ209 552652 53550L 56912B WTT028 34890C 35300E WSZ209 552651 WTT021 WTT021 INTERIOR PARTS EV ...

Page 36: ...2 56930V 56411A WSZ002 56549F WTT021 56170D 350121 33660A WMP021 56930M 54810C 50CZZH 50FZZA 56201A 56851D 54980A 568771 55900A WWP008 WNH003 56322A WWS005 36549W 54975A WSZ002 WTT021 55012E WTP002 BASE PLATE PARTS EV ...

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