MICROWAVE OVEN SERVICE MANUAL
Contents
1. Desliga Cancela Pratos Brosileiros gt Dial gt Liga 5 TIME COOKING Desliga Cancela gt Manual 3 amp Dial Power 39 Liga gt Dial Time Liga 6 MULTI STAGE COOKING 1ST STAGE Desliga Cancela gt Dial Liga gt Dial Time Liga 2ND STAGE Manual gt Dial Power gt Liga Dial Time gt Liga 4 2 gt m _ gt Dial Desliga Cancela Op es Liga gt Liga To select DEMO mode Desliga Cancela 3 Op es Fe Liga SCHEMATIC DIAGRAM GN FUSE SCHEMATIC DIAGRAM OVEN THERMOSTAT PRIMARY SWITCH RD H V TRANSFORMER H V CAPACITOR GRILL HEATER ASSY FAN MOTOR MONITOR SWITCH TURNTABLE MOTOR MAGNETRON H V DIODE SECONDARY SWITCH U A MGT THERMOSTAT NOTE DOOR IS OPENED BK BLACK RD RED YL YELLOW WH WHITE PK PINK BN BROWN BL BLUE GN GREEN 4 3 CIRCUIT DESCRIPTION GENERAL DETAILS The low voltage transformer supplies the necessary voltage to the micom controller when power cord is plugged in When the door is closed the primary switch is ON the secondary switch is ON and the monitor switch opens contact COM and NO WHEN SELECTING COOKING POWER LEVEL AND TIME The mic2. MAGNETRON THE OVEN IS TO BE SERVICED ONLY BY PROPERLY QUALIFIED SERVICE PERSONNEL 2 1 INSTALLATIONS BEFORE YOU BEGIN READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY INSTALLING 1 Empty the microwave oven and clean inside it with a soft damp cloth Check for damage such as misaligned door damage around the door or dents inside the cavity or on the exterior 2 Put the oven on a counter table or shelf that is strong enough to hold the oven and the food and utensils you put in it The control panel side of the oven is the heavy side Use care when handling 3 Do not block the vent and the air intake openings Blocking vent or air intake openings can cause damage to the oven and poor cooking results Make sure the microwave oven legs are in place to ensure proper air flow 4 The oven should not be installed in any area where heat and steam are generated because they may damage the electronic or mechanical 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 10cm 3 1 EARTHING INSTRUCTIONS This microwave oven is designed to be use
3. NOTE Leakage with the outer case removed less than 5 mW cm sq Leakage for a fully assembled oven Before the latch switch primary is interrupted with the door in a slightly opened position less than 2 mW cm sq 5 2 NOTES WHEN MEASURING Do not exceed meter full scale deflection The 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 the oven surface this may cause probe damage RECORD KEEPING AND NOTIFICATION AFTER MEASUREMENT After adjustment and repair of any microwave energy interruption or microwave energy blocking device record the measured values for future reference Also enter the information on the service invoice The microwave energy leakage should not be more than 4 mW cm sq after determining that all parts are in good condition functioning properly and genuine replacement parts which are listed in this manual have been used At least once a year have the electromagnetic energy leakage monitor checked for calibration by its manufacturer MEASUREMENT OF MICROWAVE POWER OUTPUT Microwave power output measurement is made with the microwave
4. SAFETY PRECAUTIONS 5 nnn Inside front cover SPECIFICATIONS 22 ESO O a REESE 1 1 ever O 2 1 INSTALLATIONS ara 3 1 OPERATING INSTRUCTIONS anna 4 1 FEATURES nee ee 4 1 CONTROL PANEL ee ee een 4 1 OPERATING SEQUENGE ne 4 2 SCHEMATIC DIAGRAM ana peat ee 4 3 CIRCUIT DESCRIPTION ee SE 4 4 SERVICE INFORMATION nun nun nn nn nun nnnnun nun nnnnuunnnnnnnnnnn 5 1 TOOLS AND MEASURING INSTRUMENTS m e mem e eme eee eee 5 1 MICROWAVE LEAKAGE TEST m meme eene eee 5 1 MEASUREMENT OF MICROWAVE POWER OUTPUT I I m me 5 3 DISASSEMBLY AND ADJUSTMENT e emm e ee e eme eee 5 3 INTERLOCK CONTINUITY TEST e oo 5 7 COMPONENT TEST PROCEDURE e eee eme eene eee 5 8 TROUBLE SHOOTING Gusto koo ae tee 5 12 EXPLODED VIEW czu ea as 6 1 REPLACEMENT PARTS LIST eere eno retineo rro nonna error anna annona serratis 7 1 SCHEMATIC DIAGRAM OE P C B dei aed enne LEER 8 1 PRINTED CIRCUIT BOARDS u em elo 8 2 PCB PARTS LIST neut III II IDEE 9 1 MODEL SPECIFICATIONS DESCRIPTION MB 319ML MB 319MLA Power Requirement MICROWAVE 1 400 Watts 12 0 120 Volts 60 Hz GRILL 1
5. Pa ce Me 4 sec 6 sec 8 sec 10 sec 12 sec 14 sec 16 sec 18 sec 20 sec 22 sec Wire leads removed Measure the resistance Ohm meter scale R x 1 Normal A Approx 85 100 ohm B Approx 10 25 ohm Abnormal Infinite or several ohms TURNTABLE MOTOR Wire leads removed Measure the resistance Ohm meter scale R x 1 Normal Approx 100 150 ohm Abnormal Infinite or several ohm NOTE MICROWAVE LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION WHEN REMOVING THE WIRE LEADS FROM THE PARTS BE SURE TO GRASP THE CONNECTOR NOT THE WIRES 5 11 TROUBLESHOOTING 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 Be careful of the high voltage circuit 3 Discharge the high voltage capacitor See page 2 1 4 When checking the continuity of the switches or of the high voltage transformer disconnect one lead wire from these parts and then check continuity with the AC plug removed To do otherwise may result in a false reading or damage to your meter 5 Do not touch any part of the ci
6. 12 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 programming when touching other pads 5 Display is fixed at some figure and can not accept any input 5 13 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 lighting 5 Display indicates a number different from one touched for example key in 5 and 3 appears in the display 6 Specific numbers for example 7 or 9 will not display when key pad is touched 7 Display does not count down with time blinking or up with clock operation 8 Display obviously jumps in time while counting down 9 Display counts down too fast while cooking 10 Each indicator light does not turn on after setting cooking cycle 11 Display time of day does not reappear when cooking is finished CONDITION CHECK RESULT CAUSE REMEDY 1 No input can be Check the conn Continuity Defective PCB Replace PCB programmed ection between assembly assembly membrane key assembly and T Loose Connect them PCB assembly connection tightly 2 Some inputs Replace key Everything works Defective key Replace key
7. BUTTON PWB PCB ASSEMBLY SUB PWB PCB ASSEMBLY SUB CANOPY MICA OUT CASE U BENDING TRAY GLASS TRAY METAL COVER HEATER SEAL RIVET ASSEMBLY SHAFT TURN TABLE HOLDER WIRE INSULATOR SHELF HEATER SHEATH ROTATING RING ASSEMBLY MOTOR CIRC SYNCHRONOUS HARNESS BOARD LATCH BOARD ASSEMBLY LATCH SWITCH MICRO SWITCH MICRO 42 lt O DDD DD DD DDD DD DD DDD DDD DW DW DW DD DDD DDD DD DDD DDD 8ABS0160958 6549W1S016A 6600W1K004C 3B73362E R SERVICE PARTS LOC NO 466003 466003 50CZZH 50FZZA 54810C 54826A 549745 55006 55262 55900 561700 561700 56324A 56411A 56549F 56851D 568771 56912B 56930V PART NO 3B73361E 3B73361E 6120W3H003F 3B74133K 4810W4C003C 4B70774A 4974W1S010A 5006WRA002A 5262W2A041A 2B72125B 6170W1D061A 6170W1D061A 6324W1A001B 6411W1A022B 6549W1F005B 6021W3B001M 6877W1A283B 6912W3B002G 6930WRT001B DESCRIPTION SWITCH MICRO SWITCH MICRO CAPACITOR DRAWING HIGH VOLTAGE FUSE DRAWING BRACKET CAPACITOR SPACER GUIDE SUCTION CAP FUSE DUCT FAN TRANSFORMER HIGH VOLTAGE TRANSFORMER HIGH VOLTAGE MAGNETRON POWER CORD ASSEMBLY MOTOR CIRC FAN CABLE ASSEMBLY HARNESS LAMP DRAWING THERMOSTAT lt O ALTER 6600W1K004B 3B73361D 0CZZW1H002F 6170W1D023B 6170W1D050A 6549W1F007B 6021W3B001K 63302L 3302W1A036G BASE PLATE 63302R 3302W1A035G BASE PLATE 63303L 3303W1A028M BASE PLATE ASSEM
8. FIXED CARBON FILM 22K OHM 1 6 W 5 52 R R22 0RD1001F609 RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 52 R R25 0RD3901F609 RESISTOR FIXED CARBON FILM 3 9K OHM 1 6 W 5 52 R R SERVICE PARTS PART NO DESCRIPTION SPECIFICATION 0RD1001F609 0RD1001F609 0RD2700F609 0RD1004F609 ORD2202F609 0RD1202F609 0RD4702F609 0RD4702F609 0RD5601F609 0RD5601F609 0RD1001F609 0RD4701F609 0RD1001F609 0RD5601F609 0RD5601F609 0RD5601F609 0RD5601F609 0RD5601F609 0RD5601F609 0RD5601F609 6920W5A008A 6920W5A008A 6920W5A008A 6920W2YD04A 6600W5R004A 6600W5R004A 6600W5R004A 6600W5R004A 6600W5R004A 6600W5R004A 6600W5R004A 6600W5R004A 6600W5R004A 6600W5R004A OIZZW5A106A 0DZ510009AF 0DZ750009BB RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RESISTOR FIXED CARBON FILM RELAY RELAY RELAY RELAY SWITCH TACT SWITCH TACT SWITCH TACT SWITCH TACT SWITCH TACT SWITCH TACT SWITCH TACT SWITCH TACT SWITCH TACT SWITCH T
9. TEST ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER SEE PAGE 2 1 2 ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD 1 LITER OF WATER IN CONTAINER IN THE OVEN COMPONENTS TEST PROCEDURE RESULTS HIGH VOLTAGE TRANSFORMER Wire leads removed PRIMARY TERMINAL 1 Measure the resistance Ohm meter scale Rx1 and Rx100 Primary winding Approx 0 2 0 4 ohm Secondary winding Approx 60 90 ohm Filament winding Less than 1 ohm Measure the resistance Ohm meter scale Rx1000 Primary winding to ground Normal Infinite Filament winding to ground Normal Infinite MAGNETRON Wire leads removed Measure the resistance Ohm meter scale Rx1 Normal Less than 1 ohm Filament terminal Measure the resistance Ohm meter scale Rx1000 Normal Infinite Filament to chassis 5 8 COMPONENTS TEST PROCEDURE RESULTS Antenna Chassis 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 CAPACITOR Measure the resistance Ohm meter scale Rx1000 Terminal to terminal Normal Momentarily indicates several ohms and then gradually returns to infinite Measure the resistance Ohm meter scale Rx1000 Terminal to case N
10. fan motor oven lamp do not turn on gt Check oven lamp 3 Abnormal Defective oven lamp Replace oven lamp Normal TROUBLE 4 Oven seems to be operating but little heat is produced in oven load CONDITION CHECK RESULT CAUSE REMEDY 5 2 Output is low Checa Lower than 90 of Decrease in power Suggest customer rating voltage source voltage contact local ORO with load electric power Normal utility company or qualified electrician Disconnect the Defective Replace wire leads from assembly assembly relay 2 and check on and off Normal time with multitester Measure the Defective Replace gt Abnormal gt gt output power magnetron magnetron NOTE Simple test of power output conducted by heating one liter water for one min if available Minimum 8 5 C temperature rise is normal condition 5 15 TROUBLE 5 No microwave oscillation even though oven lamp and fan motor run Display operates properly CONDITION CHECK RESULT CAUSE REMEDY No microwave Disconnect the No continuity Defective PCB Replace PCB oscillation wire leads from assemb
11. oven supplied at its rated voltage and operated at its maximum microwave power setting with a load of 1000 5 g of potable water The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 190mm The oven and the empty vessel are at ambient temperature prior to the start of the test initial temperature T1 of the water is 10 2 C It is measured immediately before the water is added to the vessel After addition of the water to the vessel the load is immediately placed on the center of the turntable which is in the lowest position and the microwave power switched on The time T for the temperature of the water to rise by a value A T of 102 15 measured where T is the time in seconds and AT is the temperature rise The initial and final water temperatures are selected so that the maximum difference between the final water temperature and the ambient temperature is 5 The microwave power output P in watts is calculated from the following formula 4187 x AT T is measured while the microwave generator is operating at full power Magnetron filament heat up time is not included about 3 sec The water is stirred to equalize temperature throughout the vessel prior to measuring the final water temperature Stirring devices and measuring instruments are selected in order to minimize addition or removal of hea
12. the oven if the oven is operative prior to servicing The service personnel should inform the manufacture importer or assembler of any certified oven unit found to have a microwave emission level in excess of 5 mW cm and should repair any unit found to have excessive emission levels at no cost to the owner and should ascertain the cause of the excessive leakage The service personnel should instruct the owner not to use the unit until the oven has been brought into compliance If the oven operates with the door open the service personnel should Tell the user not to operate the oven Contact the manufacturer The service personnel should check all surface and vent openings for microwave leakage Check for microwave leakage after every servicing The power density of the microwave radiation leakage emitted by the microwave oven should not exceed 4 mW cm Always start measuring of an unknown field to assure safety for operating personnel from radiation leakage 5 1 NECESSARY MEASURING INSTRUMENTS TESTER VOLTS DC AC Ohmmeter Microwave survey meter Holaday HI 1500 HI 1501 Narda 8100 8200 Inch scale 600 non conductive material beaker glass or plastic inside diameter approx 8 5 cm 31 2 in Cylindrical and made of borosilicate glass vessel max thickness 3 mm outside diameter approx 190mm height approx 90mm e Glass thermometer 100 C or 212 1 deg scale MEASURING MICRO
13. 050 Watts Single phase 2 wire grounded Power Output 1 000 Watts full microwave power IEC60705 Microwave Frequency 2 450 MHz Magnetron 2M246 Timer 0 99 min 99 sec Outside Dimensions 530 W x 315 x 394 Cavity Dimensions 350 W x 240 H x 365 D Net Weight 16 3 kg approx Shipping weight 18 7 kg approx Control Complement Touch Control System Clock 1 00 12 59 Microwave Power for Variable Cooking Power level Full power throughout the cooking time 220 Volts AC 60 Hz approx 90 of Full power 8 Reheat 6 Medium 4 Defrost 2 Simmer approx 80 approx 70 approx 60 approx 50 approx 40 approx 30 approx 20 approx 10 Nameplate Location Back Side Owner s manual 8 Cooking guide Accessories Glass turntable Rotating ring Grill Rack This microwave oven is designed for household use only It is not recommended for commercial purposes 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 during repair DO NOT operate on a 2 wire extension cord during repair and use NEVER TOUCH any oven components or wiring during operation BEFORE TOUCHING any parts of the oven always remove the power plug from the outlet For about 30 seconds after
14. ACT IC DRAWING DIODE ZENERS DIODE ZENERS 9 2 1K OHM 1 6 W 5 TA52 1K OHM 1 6 W 5 TA52 270 OHM 1 6 W 5 52 1M OHM 1 6 W 5 TA52 22K OHM 1 6 W 5 52 12K OHM 1 6 W 5 52 47K OHM 1 6 W 5 TA52 47K OHM 1 6 W 5 TA52 5 6K OHM 1 6 W 5 52 5 6K OHM 1 6 W 5 52 1K OHM 1 6 W 5 52 4 7K OHM 1 6 W 5 52 1K OHM 1 6 W 5 52 5 6K OHM 1 6 W 5 52 5 6K OHM 1 6 W 5 52 5 6K OHM 1 6 W 5 52 5 6K OHM 1 6 W 5 52 5 6K OHM 1 6 W 5 52 5 6K OHM 1 6 W 5 52 5 6K OHM 1 6 W 5 52 DQ1U DAIICHI 250VAC 12VDC DQ1U DAIICHI 250VAC 12VDC DQ1U DAIICHI 250VAC 12VDC OZF S 112LM1P OEG 240VAC 16A IT 1102AH T 200 IN SUNG 15V 20 IT 1102AH T 200 IN SUNG 15V 20MA IT 1102AH T 200 IN SUNG 15V 20MA IT 1102AH T 200 IN SUNG 15V 20MA IT 1102AH T 200 IN SUNG 15V 20MA IT 1102AH T 200 IN SUNG 15V 20MA IT 1102AH T 200 IN SUNG 15V 20MA IT 1102AH T 200 IN SUNG 15V 20MA IT 1102AH T 200 IN SUNG 15V 20MA IT 1102AH T 200 IN SUNG 15V 20MA HITACHI 64 DIP BK BRAZIL UZ 5 1BS PYUNG CHANG TP52 DO34 UZ 7 5BS PYUNG CHANG TP52 DO34 DUDUDDIDIIIIIIIIIIIIIIIII II IIIIIIII II VII DV 6920W5A007A 6920W2D010B 6920W2D010A 6920W5A012A R SERVICE PARTS Aug 2002 P NO 3828W5S1726 Printed in Korea
15. ARY INTERLOCK SWITCH TEST Disconnect the wire lead from the secondary switch Connect the ohmmeter leads to the common COM and normally open NO terminals of the switch The meter should indicate a open circuit in the door open condition When the door is 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 terminals of the switch The meter should indicate closed circuit in the door open condition When the door is closed meter should indicate an open circuit When the monitor switch operation is abnormal replace with the same type of switch NOTE After repairing the door or the interlock system it is necessary to do this continuity test before operating the oven RESULTS SWITCHES Wire leads removed Check for continuity of the switch with an Ohm meter Door open Primary Switch EN Monitor Switch cy Secondary Switch EN 5 7 NOTE After checking for the continuity of switches make sure that they are connected correcily COMPONENT TEST PROCEDURE CAUTIONS 1 DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE OUTER CASE FROM THE UNIT PROCEED WITH THE
16. BLY 63303R 3303W2A004K BASE PLATE ASSEMBLY 647781 4B73900A LEG 948501 4850W4C001D CUSHION 948502 4850W4C001J CUSHION 948503 3B72244G CUSHION 948504 3B72244C CUSHION WNZ015 4B71028B NUT DRAWING WSZ002 1SBF0402418 SCREW TAP TITE S BINDING HEAD WSZ085 4B70188C SCREW DRAWING WSZ184 1SZZW2Z001E SCREW DRAWING WTP004 1 1 0302418 SCREW TAPPING PAN HEAD WTPO13 1 1 0402418 SCREW TAPPING PAN HEAD WTT010 1TTG0402422 SCREW TAPPING TRUSS HEAD WTT021 1TTL0402418 SCREW TAPPING TRUSS HEAD WTTO28 WTT037 1TTL0402818 1TTL0403818 SCREW TAPPING TRUSS HEAD SCREW TAPPING TRUSS HEAD JJ JJ 20 b 7 DU 20120 20 DT IT ID DT DD DDD 22 22 22 22 22 2 22 2 29 0 2 2 Z0 ZU 2 R SERVICE PARTS SCHEMATIC DIAGRAM OF P C B MAGNETRON 9 CN1 020 R20 R50 1N4148 1K CR1 P NO 621 ZWSMOCZA 930 y dy D31 CIOS e 7 e 1N4148 OR sel s C3202 6 21 1 AMS 114YF 114YFA P NO ORR4702D61 47K 7 1 10W PH P3132 D32 1N4148 033 033 1N4148 CIOS a L 8020wZYDO4 7 D35 DOOR 1N4148 SWITCH GN 1 4148 8 1 P NO YA19D
17. LG MICROWAVE MODEL MB 319ML MB 319MLA AUTION BEFORE SERVICING THE UNIT READ THESAFETY PRECAUTIONS IN THIS MANUAL 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 A Do not operate or allow the oven to be operated with the door open B Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source and make repairs as necessary 1 interlock operation 2 proper door closing 3 seal and sealing surfaces arcing wear and other damage 4 damage to or loosening of hinges and latches 5 evidence of dropping or abuse 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 and microwave generation and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the owner CONTENTS Page
18. LICK LGEAZ R LED1 ODLZW5A003A LED LITEON LTL 12BGE 1 BK GREEN NA R Q01 OTR126609AA TRANSISTOR BIPOLARS KEC KTA1266 Y KTA1015 TP TO92 R Q02 OTR126609AA TRANSISTOR BIPOLARS KTA1266 Y KTA1015 TP TO92 R Q20 0TR107009AD TRANSISTOR BIPOLARS KRC 107M TP TO92M 50V 100MA R Q30 0TR105009AB TRANSISTOR BIPOLARS KEC KRC105M KRC1205 TP TO92 R Q31 0TR105009AB TRANSISTOR BIPOLARS KEC KRC105M KRC1205 TP TO92 R Q33 OTR105009AB TRANSISTOR BIPOLARS KEC KRC105M KRC1205 TP TO92 R Q50 0TR107009AD TRANSISTOR BIPOLARS KRC 107M TO92M 50V 100MA R Q80 0TR107009AD TRANSISTOR BIPOLARS KRC 107M TP TO92M 50V 100MA R R01 0RD1501G609 RESISTOR FIXED CARBON FILM 1 5K OHM 1 4 W 5 TA52 R R01 0RD1501F609 RESISTOR FIXED CARBON FILM 1 5K OHM 1 6 W 5 TA52 R R02 0RD1501G609 RESISTOR FIXED CARBON FILM 1 5K OHM 1 4 W 5 TA52 R R02 0RD4701F609 RESISTOR FIXED CARBON FILM 4 7K OHM 1 6 W 5 TA52 R R03 0RD1001F609 RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 TA52 R R04 0RD1001F609 RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 52 R R10 ORDO202F609 RESISTOR FIXED CARBON FILM 20 OHM 1 6 W 5 TA52 R R11 0 00102 609 RESISTOR FIXED CARBON FILM 10 OHM 1 6 W 5 TA52 R R12 0RD0102F609 RESISTOR FIXED CARBON FILM 10 OHM 1 6 W 5 TA52 R R13 0RD1003F609 RESISTOR FIXED CARBON FILM 100K OHM 1 6 W 5 TA52 R R20 0RD1001F609 RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 52 R R21 0RD2202F609 RESISTOR
19. OR P NO 6630WSVO39G YCH200 13PIN AMB 316XF 316XFA P NO 6024WRYAO6B ES1005A SEIL The unit of ELECTROLYTIC CAPACITOR is uF V ex 220 25V 220 uF 25 V 2 The unit of CERAMIC CAPACITOR is pF ex 223P 22510 pF with built in bios resistor The unit of RESISTOR is ohm and K 1000 M K K 4 The transistor in the hidden circle line is transistor PRINTED CIRCUIT BOARD Zn 22 0233 Ep 6870W2A233A we 00M0C07627 vol ceo HE R81 w CR R83 w 001 a css TE RO1 m 201 J100 er jA mi 55 Pc Fas GK ve Y2 O O CO O GRILL O MICROWAVE O O 8 2 P C B PARTS LIST a PART NO DESCRIPTION SPECIFICATION SVG ALTER AR3 0RZ4702G610 RESISTOR DRAWING 47KOHM 1 4W 5 3216 BULK 8 PIN R C01 0CK1040K949 CAPACITOR FIXED CERAMIC 0 1UF D 50V 80 20 F Y5V TA52 R C02 0CE2276H638 CAPACITOR FIXED ELECTROLYTIC 220UF SMS SG 25V 20 FM5 TP 5 R C03 0CE2276H638 CAPACITOR FIXED ELECTROLYTIC 220UF SMS SG 25V 20 FM5 TP 5 R C03 0CE2276H638 CAPACITOR FIXED ELECTROLYTIC 220UF SMS SG 25V 20 FM5 TP 5 R C04 0CE4756K638 CAPACITOR FIXED ELECTROLYTIC 4 7UF SMS SG HR 50V 20 FM5 TPS R C05 0CK2230K949 CAPACITOR FIXED CERAMIC 22NF D 50V 80 20 F Y5V 52 R C06 0CK1040K949 CAPACITOR FIXED CERAMIC 0 1UF D 50V 80 20 F Y5V
20. RTS LATCH BOARD PARTS INTERIOR PARTS 6 6 BASE PLATE PARTS LOC NO 01 02 05 13213A 13536A 13552A 13581A 13720D 14026A 14890A 14970A 15006A 23572A 23790D 243501 24510L 247815 249401 24970A 250201 250202 250203 250204 250205 268711 268712 33052M 33112U 33390G 33390M 33550H 34036W 340511 34370T 34930W 35012A 35026G 353005 35889A 365495 368771 43500A 43501A 466001 466001 REPLACEMENT PARTS LIST PART NO 3828W5A1811 3828W581726 3850W3D065A 3213W1A028B 3536WRA001L 3552W1A037A 3581W1A250B 3720W0D180C 4026W2A012A 4890W1D039W 4970WRAO001C 5006W3A017A 3572W0A221C 3790W2A001B 4350W3A022A 4510W3L004A 4781W1S086H 4940W3A020A 4B72023A 5020W2A159A 5020W2A158A 5020W3A141A 5020W2A084A 5020W3A140A 6871W2S234B 6871W2S233A 3052W3M011C 3112W1U015S 3390W1G010A 3390W1A011A 3550W1A084B 4036W3W001A 4051W3A001A 4370W3A003A 4B72510F 5012W3A020A 5026W1A037E 5300W1S002C 5889W2A005J 6549W1S002A 4B75297B 3500W1A004A 3501W1A003H 3B73362F 3B73362F DESCRIPTION MANUAL OWNERS MANUAL SERVICE LABEL COOKING GUIDE DOOR FRAME ASSEMBLY SEAL TAPE CHOKE COVER DOOR ASSEMBLY PANEL DOOR LATCH GLASS SPRING CAP CHOKE COVER PANEL CONTROL WINDOW DIGITRON RING LEVER CONTROLLER ASSEMBLY SEMI MICOM KNOB SPRING BUTTON BUTTON BUTTON BUTTON
21. TA52 R C10 0 2230 949 CAPACITOR FIXED CERAMIC 22NF D 50V 80 20 F Y5V 52 R C11 OCE4766K638 CAPACITOR FIXED ELECTROLYTIC 47UF SMS SG 50V 20 5 TP 5 R 20 0CK2230K949 CAPACITOR FIXED CERAMIC 22NF D 50V 80 20 F Y5V TA52 R C21 0CK2230K949 CAPACITOR FIXED CERAMIC 22NF D 50V 80 20 F Y5V TA52 R C25 0CK2230K949 CAPACITOR FIXED CERAMIC 22NF D 50V 80 20 F Y5V TA52 R C80 0CK2210K519 CAPACITOR FIXED CERAMIC 220PF D 50V 10 B Y5P 52 R C81 0CK2210K519 CAPACITOR FIXED CERAMIC 220PF D 50V 10 B Y5P 52 R C82 0CK2210K519 CAPACITOR FIXED CERAMIC 220PF D 50V 10 B Y5P 52 R C84 0CK2210K519 CAPACITOR FIXED CERAMIC 220PF D 50V 10 B Y5P 52 R CU4 4850W4C001D CUSHION 9T 15W 40L RUBBER R D01 0DD400209AD DIODE SWITCHING 1N4002 PYUNG CHANG TP52 DO41 R D02 0DD400209AD DIODE SWITCHING 1N4002 PYUNG CHANG TP52 DO41 R D03 0DD400209AD DIODE SWITCHING 1N4002 PYUNG CHANG 52 DO41 R 010 0DD400209AD DIODE SWITCHING 1N4002 PYUNG CHANG 52 DO41 R D20 0DD414809AD DIODE SWITCHING 1N4148 PYUNG CHANG 52 DO35 R D30 0DD414809AD DIODE SWITCHING 1N4148 PYUNG CHANG 52 DO35 R D31 0DD414809AD DIODE SWITCHING 1N4148 PYUNG CHANG 52 DO35 R 032 0DD414809AD DIODE SWITCHING 1N4148 PYUNG CHANG 52 DO35 R D33 0DD414809AD DIODE SWITCHING 1N4148 PYUNG CHANG TP52 DO35 R DP1 6302W5A015A DIGITRON HNM 07SS30 7 AMB 314XF W POOL R 01 6024WRYA06B VOLUME ROTARY ES1005A SEIL 24C
22. WAVE ENERGY LEAKAGE Pour 275 15cc of 20 5 68 9 F water in a beaker which is graduated to 600 cc and place the beaker on the center of the turntable Set the energy leakage monitor to 2 450 MHz and use it following the manufacturer s recommended test procedure to assure correct result When measuring the leakage always use the 2 inch bcm spacer supplied with the probe Operate the oven at its maximum output Measure the microwave radiation using and electromagnetic radiation monitor by holding the probe perpendicular to the surface being measured Move probe along shaded area Probe scanning speed Less than 2 5 cm sec 1 in sec MEASUREMENT WITH OUTER CASE REMOVED When you replace the magnetron measure for microwave energy leakage before the outer case is installed and after all necessary components are replaced or adjusted Special care should be taken in measuring the following parts Circled area of Fig below Around the magnetron The waveguide WARNING AVOID CONTACTING ANY HIGH VOLTAGE PARTS y 7 534 R AS as 4 2 We MEASUREMENT WITH A FULLY ASSEMBLED OVEN After all components including the outer case are fully assembled measure for microwave energy leakage around the door viewing window the exhaust opening and air inlet openings Microwave energy leakage must not exceed the values prescribed below
23. cannot be membrane as specified membrane membrane programmed assembly and assembly assembly check operation 3 Display shows a Still have trouble gt Defective PCB BERSA Replace PCB number or figure assembly assembly different from one touched 4 Random 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 Check continuity fen Malfunction of the Replace fuse FUSS BONS of monitor CORR monitor switch primary monitor switch with ES door closed ae switches an continuity RELAY RY2 of P C B Assembly Replace fuse Check continuity Continuity Shorted contact at Replace fuse of primary the primary switch primary monitor switch with secondary door opened No continuity switches and RELAY RY2 of P C B Assembly Check continuity Continuity E Replace fuse of secondary ENIS h primary monitor switch with gt opened ad Switches an No continuity RELAY RY2 of P C B Assembly Disconnect one Defective high Replace high side of the wire lead connected from transformer to the high voltage capacitor and operate the unit voltage capacitor vol
24. d in a fully earthed condition It is imperative therefore to make sure it is properly earthed before servicing WARNING THIS APPLIANCE MUST BE EARTHED OPERATING INSTRUCTIONS FEATURES Oven Front Plate Window Door Screen Door Seal Display Window Control Panel Door Open Button Safety Door Lock System Turntable Rotating Ring Grill Rack Metal Tray 8 Turntable Shaft CONTROL PANEL 1 BRAZILLIAN COOK This menu has been pre programmed to cook food automatically by one touch 2 MENUS LIGHT To let your microwave cook your selections 3 OPTION You can select on off of beeper scroll speed control and on off of Demo 4 AUTO COOK This oven s menu has been Pal O 1 preprogrammed to automatically to cook food 2 5 AUTO REHEAT This oven s menu has been to preprogrammed to automatically reheat food 4 6 AUTO DEFROST To select the desired auto weight defrost programmed with dial 7 AUTO CRISP 6 8 STOP CLEAR To stop oven and clear all entries Prato Crocante Desligo Cancelo except time of day 8 9 MANUAL 10 START This feature allows oven to begin 10 functioning 11 DISPLAY WINDOW Provides indications of the functions selected normally current time displayed e a gt ff eijao Mandioca Arroz Auto Reaquecer 5 4 1 OPERATING SEQUENCE The following is a description of co
25. ly assembly relay 2 and check continuity gt Continuity of relay 2 Operate the unit Check high vol Defective high Replace high tage transformer voltage voltage transformer transformer gt Normal Check high vol wl Abnormal Defective high Replace high i tage capacitor voltage capacitor voltage capacitor gt Normal Check high vol Defective high Replace high gt tage diode voltage diode voltage diode 1 Normal Check Abnormal Defective Replace magnetron magnetron magnetron NOTE Make sure the wire leads in the correct position When removing the wire leads from the 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 Output is full power when you set lower power level Disconnect the wire leads from relay 2 and check continuity relay 2 Operate the unit Abnormal Defective PCB assembly Replace POB assembly 5 16 EXPLODED VIEW INTRODUCTION OVEN CAVITY PARTS INTERIOR PARTS BASE PLATE PARTS DOOR PARTS LATCH BOARD PARTS CONTROL PANEL PARTS 6 1 DOOR PARTS 6 2 CONTROLLER PARTS OVEN CAVITY PA
26. microwave leakage tighten the mounting screws properly making sure there is no gap between the waveguide and the magnetron Air Duct Waveguide Dome Waveguide Bracket Magnetron Gasket Magnetron 5 5 G REMOVING THE TURNTABLE MOTOR 1 Remove the turntable and rotating ring 2 Lay the unit down on its back 3 Remove the turntable motor cover The turntable base cover is easily removed by pinching the eight parts with a wire cutting 4 Disconnect the leadwire from the turntable motor terminals 5 Remove the screw securing the turntable motor to the oven cavity ASSEMBLY 6 After repairing the motor rotate the removed turntable motor cover 7 Fit the turntable motor cover s projecting part to the base plate slit NOTE 1 Remove the wire lead from the turntable motor VERY CAREFULLY 2 Be sure to grasp the connector not the wires when removing Turntable Motor Wire Leads HIGH VOLTAGE TRANSFORMER REMOVAL 1 Discharge the high voltage capacitor 2 Disconnect the leadwire from magnetron high voltage transformer and capacitor 3 Remove the screw holding the high voltage transformer to the baseplate I FAN MOTOR ASSEMBLY REMOVAL 1 Discharge the high voltage capacitor 2 Disconnect the leadwire from fan motor and high voltage capacitor 3 Remove the two screws holding the the suction guide ASSEMBLY to the oven cavity 4 Remove the two scre
27. mponent functions during oven operation 1 SETTING THE CLOCK Desliga Cancela Manual gt Dial gt Liga Dial Liga gt Dial Liga NOTE 1 This is a 24 hour clock 2 Clock will operate as long as power is applied to the oven 2 CANCEL FUNCTION Touch the Desliga Cancela pad whenever you need to cancel an entry or a function currenily in use The display will either return to the last item entered or to the clock 3 QUICK START Desliga Cancela gt Liga 4 ONE TOUCH COOKING 7 AUTO WEIGHT DEFROST COOKING 2X Dial Desliga Cancela 3 Auto Descongela Number gt Liga 8 CHILD LOCK This oven has a CHILD LOCK feature TO SET CHILD LOCK Touch the Desliga Cancela button Touch and hold Desliga Cancela button DESATIVADO appear on the display TO CANCEL CHILD LOCK Touch the Desliga Cancela button Touch and hold Desliga Cancela button ATIVADO appears 9 CUSTOM SET You can select ON OFF of beeper language speed DEMO mode To select sound ON OFF m Opc es gt Desliga Cancela Op es Liga To select language speed
28. ng the door be sure to check that the primary switch monitor switch and secondary switch operate normally 2 After replacing the door check for microwave energy leakage with a survey meter Microwave energy must be below the limit of 4 mW cm with a 275 ml water load 3 When mounting the door assembly to the oven assembly be sure to adjust the door assembly parallel to the chassis Also adjust so the door has no play between the inner door surface and oven frame assembly If the door assembly is not mounted properly microwaves may leak from the clearance between the door and the oven 5 4 Remove choke cover Remove door MAGNETRON REMOVAL 1 Disconnect the leadwire from the magnetron 2 Carefully remove the mounting screws holding the magnetron and the waveguide 3 Remove the magnetron ASSEMBLY until the tube is clear from the waveguide NOTE 1 When removing the magnetron make sure its dome does not hit any adjacent parts or it may be damaged 2 When replacing the magnetron be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition 3 After replacing the magnetron check for microwave leakage with a survey meter around the magnetron Microwave energy must be below the limit of 5 mW cm With a 275 ml water load Make sure that gasket is rigidly attached to the magnetron To prevent
29. om controller memorizes the function you set The time you set appears in the display window e Each indicator light turns on to indicate that the stage has been set WHEN TOUCHING THE START PAD The coil of the relay is energized by the micom controller Power input is supplied to the high voltage transformer through the fuse to the primary switch and relay 2 Turntable rotates PRIMARY SWITCH O FUSE a HN MONITOR TRANS SWITCH 4 FORMER SECONDARY 5 RELAY 21 SWITCH ET 66 9 MICOM CONTROLLER The fan motor rotates and cools the magnetron by blowing air coming from the intake on the base plate The air is also directed into the oven to exhaust the vapor in the oven through the upper plate Cooking time starts counting down 3 3 volts AC is generated from the filament winding of the high voltage transformer This 3 3 volts is applied to the magnetron to heat the magnetron filament through two noise preventing choke coils 4 4 A high voltage of approximately 2100 volts AC is generated in the secondary of the high voltage transformer which is increased by the action of the high voltage diode and charging of the high voltage capacitor The negative 4 000 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 2 by the applied signal to va
30. ormal Infinite HIGH VOLTAGE DIODE NOTE Some inexpensive meters may indicate infinite resistance in both direction Measure the continuity Forward Ohm meter scale Rx10000 5 Normal Continuity Abnormal Infinite Measure the continuity Reverse Ohm meter scale Rx10000 5 9 Normal Infinite Abnormal Continuity COMPONENTS TEST PROCEDURE RESULTS HEATER ELEMENT Measure the resistance Normal Wire leads removed Multi meter scale RX1 Gill heater Approx 15 Q at 20 30 Measure the resistance with 500V 100M Normal Ohm insulation resistance meter more than 1 0M Q NOTE Make sure heater is fully cooled when tested MAGNETRON 0 C Approx 180 C Approx 180 C THERMOSTAT e OVEN x 0 C Approx 145 C Approx 145 C THERMOSTAT e FUSE Check the continuity of the switch Normal Abnormal Wire leads removed with an Multi meter 2 os NOTE If the fuse is blown check primary the secondary 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 Replace just the fuse if the switches operate normally 5 10 COMPONENTS TEST PROCEDURE RESULTS RELAY 2 Check for continuity of relay 2 with an ohm meter Remove wire leads from relay 2 and operate the unit Relay 2
31. rcuit on the PCB since static electric discharge may damage this control panel Always touch yourself to ground while working on this panel to discharge any static charge built up in your body Micom model only CONDITION CAUSE REMEDY Microwave oven Inserting many plugs into one Avoid using other electrical does not work outlet and using them at the appliances when you use the same time microwave oven blown fuse or breaker Microwave oven plug is not Insert microwave oven plug inserted tightly securely Output power is too low Low AC input voltage Use the microwave oven at adequate line voltage Food temperature is too low gt This may not be a defect It is possible that the food should be cooked for a longer time period Sparks occur Using metallic ware and lg Do not use metallic ware for allowing it to touch the oven cooking except that noted in wall the cooking guide Ceramic ware trimmed in Do not use any type of gold or silver powder is used cookware with metallic trimming Uneven cooking Inconsistent intensity of Use plastic wrap of lid microwave by their 2 Stir once or twice while characteristics cooking soup cocoa or milk etc 5
32. ry the average output power of microwave oven as POWER LEVEL refer to page 1 1 One complete cycle of the relay 2 is 22 seconds WHEN THE DOOR IS OPENED DURING COOKING Both the primary switch and relay 2 cut off the primary winding voltage of the high voltage transformer ON OFF of relay 2 is coupled electrically with opening and closing of the secondary switch When the door is opened the secondary switch is opened and when the door is closed the secondary switch is closed The cooking time stops counting down Relay stops functioning As the door is opened if the contact of primary switch and relay 2 and or secondary switch fail to open the fuse opens due to the large current surge caused by the monitor switch activation which in turn stops magnetron oscillation PRIMARY SWITCH FUSE H V TRANS FORMER MONITOR SWITCH SECONDARY SWITCH LT RELAY 2 Sa MICOM CONTROLLER SERVICE INFORMATION TOOLS AND MEASURING INSTRUMENTS NECESSARY TOOLS Tools normally used for TV servicing are sufficient Standard tools are listed below Diagonal pliers Long nose pliers Phillips screwdriver Flat blade screwdriver Wrench size 5mm Nutdriver size 5mm Adjustable wrench Soldering iron Solder e Vinyl insulation tape Polishing cloth MICROWAVE LEAKAGE TEST CAUTIONS Be sure to check microwave leakage prior to servicing
33. t P WATER LOAD TURNTABLE DISASSEMBLY AND ADJUSTMENT A OUTER CASE REMOVAL 1 Disconnect the power supply cord from the outlet 2 Remove the screws from the rear of the case The outer case must be moved backward to be lifted off B POWER SUPPLY CORD 1 Remove the outer case 2 Disconnect two terminals and remove one screw of the ground terminal C CONTROL PANEL ASSEMBLY 1 Open the door 2 Disconnect the leadwire from RELAY RY2 of the PCB SUB ASSEMBLY 3 Disconnect the leadwire from connector CN1 of the PCB SUB ASSEMBLY 4 Lift up and pull out control panel assembly carefully from the cavity CAUTION DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE SERVICING refer to page 2 1 5 3 Remove the screw 155 DE D PCB ASSEMBLY REMOVAL 1 Remove the control panel assembly from the cavity Refer to control panel assembly removal on previous page 2 Remove screws which hold the SUB ASSEMBLY to the control panel 3 Disconnect the flat cable from the SUB ASSEMBLY and take off the SUB ASSEMBLY PCB Sub Asm N Control Panel E DOOR MAIN ASSEMBLY REMOVAL 1 Open the door 2 Remove the choke cover very carefully with a flat blade screwdriver CAUTION Be careful not to damage door seal plate by screwdriver 3 Lift up and push the door NOTE 1 After replaci
34. tage capacitor Fuse blows again Defective high volt age transformer Replace high volt age transformer NOTE All these switches must be replaced at the same time Refer to page 5 7 5 8 2 Fuse does not blow of power supply cord supply cord Check continuity H No continuity Defective Replace of thermostat thermostat thermostat gt Continuity 3 Check continuity No continuity Defective power Replace power supply cord 5 14 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 1 Setting time Check continuity No continuity Defective Replace does not count of secondary secondary switch secondary switch down when switch with touching START door closed gt Continuity pad gt Check the con Continuity Defective PCB Replace PCB nection between assembly assembly CN1 connector gt and ECE No continuity Loose connection 3 SOR BET hem assembly tightly 2 Fan motor or 1 9 Check fan motor gt Abnormal Defective fan motor gt Replace
35. the oven stops an electric charge remains in the high voliage capacitor When replacing or checking you must discharge the high voltage capacitor by shorting across the two terminals with an insulated screwdriver Remove your watches whenever working close to or replacing the Magnetron DO NOT touch any parts of the control panel circuit A resulting static electric discharge may damage this P C B NEVER operate the oven with no load NEVER injure the door seal and front plate of the oven cavity NEVER put iron tools on the magnetron NEVER put anything into the latch hole and the interlock switches area MICROWAVE RADIATION Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating device if it is improperly used or connection All input and output microwave connections waveguide flange and gasket must be secure never operate the device without a microwave energy absorbing load attached Never look into an open waveguide or antenna while the device is energized Proper operation of the microwave oven requires that the magnetron 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 ANTENNA Gasket COOLING FIN FILAMENT TERMINALS MAGNETRON CHASSIS GROUND
36. ty test procedure ADJUSTMENT DIRECTION SECONDARY SWITCH MONITOR SWITCH PRIMARY SWITCH INTERLOCK CONTINUITY TEST WARNING FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS ALL THESE SWITCHES MUST BE REPLACED AT THE SAME TIME 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 PRIMARY INTERLOCK SWITCH TEST When the door release button is depressed slowly with the door closed an audible click should be heard at the same time or successively at intervals When the button is released slowly the latches should activate the switches with an audible click If the latches do not activate the switches when the door is closed the switches should be a adjusted in accordance with the adjustment procedure Disconnect the wire lead from the primary switch Connect the ohmmeter leads to the common COM and normally open NO terminal of the switch The meter should indicate an open circuit in the door open condition When the door is closed the meter should indicate a closed circuit When the primary switch operation is abnormal make the necessary adjustment or replace the switch only with the same type of switch COMPONENTS TEST PROCEDURE B SECOND
37. ws holding the fan motor ASSEMBLY to the suction guide ASSEMBLY J HIGH VOLTAGE CAPACITOR AND DIODE REMOVAL 1 Discharge the high voltage capacitor 2 Disconnect the leadwire from fan motor and high voltage capacitor 3 Remove the screw holding the suction guide ASSEMBLY to the oven cavity 4 Remove the screw holding the high voltage capacitor bracket and remove the high voltage diode earth Screw Fan Motor H V Diode K 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 2 MOUNTING OF THE PRIMARY MONITOR SECONDARY SWITCHES TO THE LATCH BOARD 3 INSTALLATION AND ADJUSTMENT OF THE LATCH BOARD TO THE OVEN ASSEMBLY Mount the latch board to the oven assembly Adjust the latch board in the arrow direction so that oven door will not have any play in it when the door is closed Tighten the mounting screw Check for play in the door by pushing the door release button Door movement should be less than 0 5 mm 1 64 inch Don t push the door release button while making this adjustment Make sure that the latch moves smoothly after adjustment is completed and that the screws are tight Make sure the primary monitor and secondary switches operate properly by following the continui
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