MICROWAVE OVEN SERVICE MANUAL
Contents
1. EQUIPMENT TESTER VOLTS DC AC Ohmmeter Microwave survey meter Holaday 1500 HI 1501 8100 8200 600 cc non conductive material beaker glass or plastic inside diameter approx 8 5 cm 31 2 in Glass thermometer 100 C or 212 F 1 deg scale MEASURING MICROWAVE ENERGY LEAKAGE Narda Pour 275 15cc of 20 5 C 68 9 F water in a beaker which is graduated to 600 cc and place the beaker on the oven 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 THE OUTER CASE REMOVED 1 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 Around the magnetron The waveguide WARNING AVOID CONTACTING ANY HIGH VOLTAGE PARTS MEASUREMENT WITH A FULLY ASSEMBLED OVEN 1 After all components including2. 1984109 MOUS seop 8 IN3180Hd eoueisiso1 1081109 128440301 INO 40128uuoo JO uid pue N ueewjeq anses os 74 0 7 IVLSONY3HL ALIAVO NINO 61 Z uo ONIMOTA ISNA SAHNAHOOHd 100303HO 908 ISNA 5 H3MOd Paya Japno SI p109 Ajddns ueuw Aejdsip ul seop HO LIS ISVIId NIIHOHA 3 MUL Q 30 d T3H MUJ AV IdSIQ L 9 abed uo NOLLVHAdO TVIHL Pee Bugoousejqno siu Sumoo ONLLOOHS 2 dy SWejqold 2 7 21 eoe deu 91 4 360 ees nai G A H JO jnunuoo eouejsisei xoeuo jewuouqy 91 4 aBed ees 9 A H eouejsisei jo eui 2 JeuuoN x s L 2 abed ees MDA AH JO eoueisiseJ SINSESW l II w suny 1 EWON O NH 80UEJSISSH cim
3. BUON L A 986 o x o 1 I euuoN MO euog I LS Jojosuuoo E Jo 1 1 91 2 60 ees c ejas joejuoo Bunees Y Jo 1 1 3 suny JEWJON 1981109 10 3 1004 o p1eoq Ainunuoo 1VISONHIHL S3HOLIMS MOOTHILNI AHVOINOO3S ANY AHVIWIHd 2 HIMOA 40 SI ex 1 15 USUM umop sjunoo e dsip JI dn jou yun 3 NITAOHd 7 22 jo pue Jo seDejs usemiaq Asy au Buiyono uaym Burzznq ON 3 THOHd 7 23 suny suny ASSY 1900 JeuuoN ASSY 40 0W suni ON MO 19EUOI joejuoo 1981109 joejuoo 1004 p LE 5 ees LS 10J99UU09 jo sowy pue E MO 1 1
4. 13581A 3581W0A155B DOOR ASSEMBLY 136501 3650W1A184B HANDLE DOOR 136502 3650W1A185B HANDLE DOOR 136503 3650W1A189F HANDLE DOOR 13720D 3720W0D414B PANEL DOOR 14026A 4026W2A019C LATCH 14890A 4890W1A065U GLASS 14970A 4970WRA001G SPRING 20CZZH OCZZW1M001C CAPACITOR DRAWING MOTOR CONDENSER 23506A 350681A003B KEY MEMBRANE 23572A 3720W0C305B PANEL CONTROL 24781M 4781W1M463B CONTROLLER ASSEMBLY KEY PAD 24810P 4810W1A401A BRACKET CONTROL PANEL 268711 6871W1A497A PWB PCB ASSEMBLY SUB 33052A 3052W1A002A CANOPY RESIN 33112U 3112W0U052N OUT CASE U BENDING 33390G 1B71961H TRAV GLASS 33530A 3530W0A055B GRILLE VENT 33550L 3550W3A095C COVER LAMP 33740A 3740W1A005E PROTECTOR MECH 340511 4051W3A001A RIVET ASSEMBLY 34370T 4370W1A011B SHAFT TURN TABLE 34810Q 4810W1A149A BRACKET MOUNT 34810T 4810W1A150D BRACKET LAMP 34890C 4890W1A045A GLASS 34930R 4930W1A069A HOLDER COOK AUXILIARY 34960A 4960W1A021B MOUNT 35026G 5026W1A048C SHELF 35230A 5230W1A012B FILTER MECH GREASE 5230W1A012A 35889A 5889W2A012F ROTATING RING ASSEMBLY 365498 6549W1S013K MOTOR CIRC SYNCHRONOUS 36549V 6549W1V006F MOTOR CIRC VENTILATION 3
5. Be sure to check microwave leakage prior to servicing 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 e If the oven operates with the door open the service personnel should Tell the user not to operate the oven Contact the manufacturer and CDRH Center for Devices and Radiological Health immediately NOTE Address on CDRH Office of Compliance HFZ 312 Center for Devices and Radiological Health 1390 Piccard Drive Rockville Maryland 20850 The service personnel should check all surface and vent openings for microwave emission testing Check for microwave energy leakage after every servicing The power density of the microwave radiation leakage emitted by the microwave oven should not exceed 1mW cm sq And always start measuring of an unknown field to assure safety for operating personnel from radiation leakage NOTE The standard is 53mW cm sq while in the customer s home 1mW cm sq stated here is manufacturer s own voluntary standard for units in customer s home
6. FILTER AS AD BK i GER E WH GND T 4 TRANSFORMER RD 3 VENT MOTOR A ae a OVEN LAMP WH BK YL ot 34 2131415 6 s WH 213141516 rich BI 6 RV8 RD RD C L BR PK I LOW m CONDENSER vu Bd 7 PK SLOW COOKTOP LAMP ku BA s BL Ya BI 3 GN 11 I ER SWITCH LL GY YL TURNTABLE MON W MOTOR MONITOR SWITCH POWER WH YL Nop c RYS a m HY TRANSFORMER WH Ce a H V MAGNETRON OVEN THERMOSTAT WH SECONDARY SWITCH BK WIRE COLORS CONTROL MODULE SYMBOL COLOR WH RDGYBKBLPKBRBL WH WHITE 123456789 1011 12 BK BLACK RD RED YL YELLOW PK PINK 12 PIN CONNECTOR CN1 BL BLUE BR BROWN GN GREEN GY GREY 5 1 MATRIX CIRCUIT FOR TOUCH KEY BOARD KEY MATRIX STOP KITCHEN AUTO 6 0 START JET TIMER EZ pog RER 5 2 GENERAL INFORMATION FOR SERVICE GENERAL PRECAUTIONS IN USE A Never operate the unit when it is empty Operating the oven with no load may shorten the life of the magnetron Whenever cooking dry foods dried fish bread etc or a small amount of food be sure to put a glass of water into the cooking compartment The glass turntable may become hot after operating be careful when touching it Aluminum foil should be
7. 3 CHECKOUT PROCEDURES FOR CIRCUIT BOARD The following symptoms indicate a defective circuit board 1 The start function fails to operate but the high voltage Systems the interlock switches the door sensing and the relay check good 2 The unit with a normal relay continuously operates 3 Proper temperature measurement is not obtained 4 The buzzer does not sound or continues to sound 5 Some segments of one or more digits do not light up or they continue to light up or segments light when they should not 6 Wrong figures appear 7 The figures of all digits 8 Some of the indicators do no flicker light up 9 The clock does not keep time properly NOTE A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON 7 20 Asy pieoq 1 euuoN E 1981109 yono yono e2e doH joejuoo 1004 LS 10 99UU09 Jo 1 LE 128440201 8DUEJSISOH 81 4 pue s aes LS Jojoauuoo Asy yono JO eouejsiseJ DINSESWI eouejsise1 1284100 JO pue
8. BASE PLATE ASSEMBLV 63861A 3861W1A043A KIT ASSEMBLV 65862B 4810W1A151A BRACKET MISC 65862D 4900W1A001B DAMPER WMT024 1MTC0403019 SCREW MACHINE TRUSS HEAD WSZ002 1SBF0402418 SCREW TITE S BINDING HEAD WSZ085 4B70188C SCREW DRAWING WTP013 1TPL0402418 SCREW TAPPING PAN HEAD WTP015 1TPL0402618 SCREW TAPPING PAN HEAD WTP018 1TPL0402818 SCREW TAPPING PAN HEAD WTT010 1TTG0402422 SCREW TAPPING TRUSS HEAD WTT021 1TTL0402418 SCREW TAPPING TRUSS HEAD WTT028 1TTL0402818 SCREW TAPPING TRUSS HEAD D DI DI U D Dj DI U DI Dj Dj DI U Dj DI DI DI U D DI U DI D D DI DI U D DW 22 DI DI D D Dj 22 D 221 DI DI DI D D D D D 201 U WTT029 1TTL0402822 SCREW TAPPING TRUSS HEAD SERVICE PARTS LOC NO REPLACEMENT PARTS LIST FOR MODEL LMV1630BB BLACK PART NO DESCRIPTION Rev 1 Feb 21 2006 ALTERNATE 01 3828W5A8536 MANUAL OWNERS 02 38288550009 MANUAL SERVICE 04 3828W5U0529 MANUAL INSTALLATION 05 3850W1D069G LABEL COOKING GUIDE 06 1 4922W5A057B TEMPLATE 06 2 4922W5A060B TEMPLATE 07 3840W1T006F CARD TECHNICAL 10 3890W3Y924J BOX YELLOW 13213A 3213W1A049F DOOR FRAME ASSEMBLY 13536A 3536W1A012B SEAL TAPE 13552A 3552W1A032H CHOKE COVER
9. 2 p RR joejuoo ON N UBAO pue yeisouueu 30 11 63 eui 5 F 0 ATddNS H3MOd L SI 44O NO U8UM jou seop UOREJRUS NITO 7 24 EV EXPLODED VIEW INTRODUCTION Model LMV1630WW LMV1630BB LMV1630ST OVEN CAVITY PARTS INTERIOR PARTS LATCH BOARD PARTS DOOR PARTS CONTROL PANEL PARTS 8 1 EV DOOR PARTS LMV1630WW LMV1630BB For Model LMV1630ST For Model EV CONTROLLER PARTS LMV1630BB LMV1630WW For Model a a 9 z G E LMV1630ST For Model EV For Model LMV1630WW For Model LMV1630BB ___LMV1630ST_ OVEN CAVITY PARTS 8 4 LATCH BOARD PARTS EV INTERIOR PARTS 8 6 EV INTERIOR PARTS Il EV INSTALLATION PARTS OWNERS service C02 D lt 104 gt DE UPPER WALL l G06 20 MANUAL MANUAL MANUAL GUDE TEMPLATE TEMPLATE 8 8 LOC NO REP
10. 24 POPCORN Touch this pad when popping popcorn in your microwave oven MELT Touch this pad to melt butter or margarine chocolate cheese marsh mallow SOFTEN Touch this pad to soften butter ice cream cream cheese frozen juice HOLD WARM Touch this pad to keep hot cooked foods warm in your microwave oven for up to 99 minutes 99 seconds KITCHEN TIMER Touch this pad to set the kitchen timer START Touch this pad to start a function If you open the door after oven begins to cook retouch START STOP CLEAR Touch this pad to stop the oven or clear all entries LESS Touch this pad to subtract ten seconds of cooking time each time you press it Ez ON Touch this pad to set and start quickly at 100 power level TURNTABLE ON OFF Touch this pad to control the turntable on or off LIGHT Touch this pad to turn the cooktop countertop light on or off OVERALL CIRCUIT DIAGRAM SCHEMATIC DIAGRAM xNote 120 VAC 60HZ H 1 DOOR OPENED amp COOK OFF MODE ON SE an 2 LIVE TERMINAL OF LAMP SOCKET FUSE 2044 0 MUST BE CONNECTED WITH BLACK OR BLUE WIRE 1 ae
11. NOTE After checking for the continuity of switches make sure that they are connected correctly WARNING FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS TYPE NO SZM V16 FA 63 OR VP 533A OF OR V 5230Q FOR PRIMARY SWITCH TYPE NO SZM V16 FA 62 OR VP 532A OF OR V 5220Q FOR MONITOR SWITCH TYPE NO SZM V16 FA 63 OR VP 533A OF OR V 5230Q FOR SECONDARY SWITCH 7 13 TEST AND CHECKOUT PRECEDURES AND TROUBLESHOOTING 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 LEAD WIRES FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER 2 ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD 1 LITER OF WATER IN CONTAINER IN THE OVEN A TEST PROCEDURES COMPONENTS TEST RESULTS TRANSFORMER FILAMENT SECONDARY WINDING PRIMARY WINDING 1 Remove wire leads 2 Measure resistance ohm meter scale Rx1 Primary winding Approx 0 2 to 0 5 ohms Secondary winding Approx 50 to 120 ohms Filament winding 0 ohm 3 Measure resistance ohm meter scale Rx1000 Primary winding to ground Normal Infinite Filament winding to ground Normal Infinite MAGNETRON Antenna Gasket Chassis gt Filament 1 Remove wire leads Install the magnetron seal in the correct
12. Monitor Interlock Switch Secondary Interlock Switch D REMOVING MAGNETRON E REMOVING STIRRER FAN Figures 11 Through 12 Figures 13 and 14 1 Remove the vent grille by loosening two screws 1 Remove one rivet ASS Y securing it to the oven Figure 11 upper plate by using knife blade 2 Remove the outcase See page 7 6 2 Remove the stirrer fan cover 3 Remove four tap tite screws securing the 3 Remove the stirrer fan magnetron to the wave guide 4 Disconnect the leadwire 5 Remove the magnetron VERY CAREFULLY NOTES When removing the magnetron make sure that its dome does not hit any adjacent parts or it may be damaged 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 After replacing the magnetron check for microwave energy leakage with a survey meter Check microwave energy leakage must be below the limit of 5 mW cm service adjustments should be made for minimum microwave energy leakage readings Figure 13 mount all Figure 14 Figure 12 7 8 F REMOVING DOOR Figure 15 H ASSEMBLING DOOR 1 Remove the vent grille by two screws securing it to 1 When mounting the door assembly to the oven the outcase loosening assembly be sure to adjust the door assembly 2 Lift up and draw the door parallel to the chassis Also adjust so the door has no NOTES play between the inner
13. SPECIFICATIONS FEATURES nn nnne rentre trennen nnn 6 1 f A A RH e ege 7 1 PRECAUTIONS AND REPAIR SERVICE TIPS 7 1 MICROWAVE LEAKAGE TEST tet t a AO EA da 7 2 POWER OUTPUT 7 3 DISASSEMBLY INSTRUCTIONS iit oaza dalia bla 7 4 INTEREOCK SYSTEM etre et rte tr e eee Mi ei alias 7 11 INTEREOCK CONTINUITY p a vta 7 13 TEST AND CHECKOUT PROCEDURES AND TROUBLESHOOTING esee 7 14 A TEST PROCEDURES eft dee regt AWA EE Eee Deo 7 14 B CHEGKOUT PROCEDURES sei ee A Aia 7 19 C TROUBLESHOOTING 7 21 EXPLODED VIEW RIRs pe a n epe a e qr on 8 1 REPLACEMENT PART LIS Tico A 9 1 SPECIFICATIONS Rated Power Consumption 1500W maximum Microwave oven Cook top lamps Ventilation fan Microwave Output i 1000W IEC60705 Frequency 2450 MHz 50 MHz Power Supply 120 60 Hz Rated Current 14 Amp Microwave oven Cook top lamps Ventilation fan Magnetron Cooling Forced Air Cooling Rectification L Rectification Voltage Double Half Wave Door Sealing Choke System Safety Devices Oven Thermostat Op
14. VENTILATION MOTOR TEST 1 Remove lead wires 2 Measure resistance ohm meter scale Rx1 High speed Blue and Black wire Low speed Blue and White wire Slow speed Blue and Grey wire RESULTS Normal High speed Approximately 60 to 75 ohm Low speed Approximately 110 to 125 ohm Slow speed Approximately 65 to 85 ohm TURNTABLE MOTOR 1 Remove wire leads 2 Measure resistance ohm meter scale Rx1000 Normal Approximately 2 5 to 3 5 Kohms Abnormal Infinite or several STIRRER MOTOR 1 Remove lead wires 2 Measure resistance ohm meter scale Rx1000 Normal Approximately 120 to 135 ohms Abnormal Infinite COMPONENTS TOUCH KEY BOARD TEST Measure the resistance between terminal pins of connector KEY CONNECTOR NOTE When reconnecting the FPC connector make sure that the holes on the FPC connector are properly engaged with hooks on the plastic fastener MATRIX CIRCUIT FOR TOUCH KEY BOARD CONNECTOR KEY CON RESULTS When When not Resistance touched touched value ess than More than 400 ohms 1 mega ohm 1 2 3 4 5 6 7 STOP UTO pid START CLOCK SEEN EZ ON Dale SOFTEN x 4 4 4 Ku 4 1 2 3 4 6 MELT 4 4 4 4 4 A 4 e e 7 8 9 0 WATER REHEAT MORE 4 4 4 4 Lo 4 4 HOT BABY OAT POPCOR COOK SOUP LESS DOS ROOD M p 4 VENT L
15. cavity Figure 20 4 Disconnect the leadwire from the turntable motor terminals b Remove the 1 screws securing the turntable motorto the oven cavity ASS Y Figure 21 NOTES Remove the leadwire from the turntable motor VERY CAREFULLY Be sure to grasp the connector not the wires when removing Es Figure 19 Wire Leads e 4 Turntable Motor Figure 21 INTERLOCK SYSTEM 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 ADJUSTMENT PROCEDURES To avoid possible exposure to microwave energy leakage adjust the door latches and interlock switches using the following procedure The Interlock Monitor and Primary Interlock Switch act as the final safety switch protecting the user from microwave energy The terminals between COM and NC of the Interlock Monitor must close when the door is opened After adjusting the Interlock Monitor Switch make sure that it is correctly connected Mounting of the primary monitor secondary switches to the latch board Latch Board Primary Interlock Switch Interlock Monitor Switch Secondary Interlock Switch Figure 23 a LATCH 0 1 64 Figure 23 b LATCH BOARD 0 1 64 CHECK THE DOOR LATCH AND SWITCH CLOSING NOTE The outer cove
16. door surface and oven frame assembivif the door assembly is not mounted properly microwaves may leak from the clearance between the door and the oven After replacing the door be sure to check that the primary interlock switch the secondary interlock switch and the interlock monitor switch is in good operating normally After replacing the door check for microwave sz j energy NU leakage with a survey meter Microwave energy t leakage must be below the limit of 5mW em With a 275 ml water load REMOVING THE VENTILATION FAN ASS Y 1 Remove the mounting plate by removing two screws securing it to the back plate See Figure 17 2 Remove the two screws securing the MOUNT ALL and one screw securing the ventilation fan ASS Y See Figure 18 a Figure 15 G DISASSEMBLING DOOR Figure 16 1 Remove the dielectric choke by using knifeblade or small screw driver etc 2 Remove two screws securing it to the door handle CAUTION Be careful not to damage door seal plate with the screwdriver MOUNT ALL Figure 16 Figure 18 a 7 9 3 Carefully pull the ventilation motor ASS Y out ofthe microwave oven See Figure 18 b Figure 18 b J REMOVING THE TURNTABLE MOTOR 1 Remove the glass tray and rotating ring 2 Remove the turntable shaft VERY CAREFULLY with a hand Figure 19 3 Remove the base plate by removing 8 screws securing it to the oven
17. 1A003A FAN 56170D 6170W1D119C TRANSFORMER HIGH VOLTAGE 6170W1D119A 56170D 6170W1D119C TRANSFORMER HIGH VOLTAGE 6170W1D119E 56201A 2B72130F FILTER ASSEMBLY CIRC 6201W1A014B 56201A 2B72130F FILTER ASSEMBLY CIRC 6201W1A014E 56324A 2B71165R MAGNETRON 2B71165P 56411A 6411W1A019M POWER CORD ASSEMBLY 56804A 6620G00007A SOCKET CIRC LAMP 56851D 6021W3B001S CABLE ASSEMBLY 6021W3B001G 56851D 6021W3B001S CABLE ASSEMBLY 6851W1A002B 568771 6877W1A597N HARNESS 56912B 6912W1Z004A LAMP DRAWING 56930V 6930W1A003E THERMOSTAT 6930W3A001S 63300M 3300W0A030A PLATE MOUNTING 63302A 3302W0A047H BASE PLATE 63303A 3303W1A072L BASE PLATE ASSEMBLY 63861A 3861W1A043A KIT ASSEMBLY 65862B 4810W1A151A BRACKET MISC 65862D 4900W1A001B DAMPER WMTO24 1MTCO403019 SCREW MACHINE TRUSS HEAD WSZ002 1SBF0402418 SCREW TAP TITE S BINDING HEAD WSZ085 4B70188C SCREW DRAWING WTP013 1TPL0402418 SCREW TAPPING PAN HEAD WTP015 1TPL0402618 SCREW TAPPING PAN HEAD WTP018 1TPL0402818 SCREW TAPPING PAN HEAD WTT010 1TTG0402422 SCREW TAPPING TRUSS HEAD WTTO20 1TTLO402416 SCREW TAPPING TRUSS HEAD WTT021 1TTL0402418 SCREW TAPPING TRUSS HEAD WTT028 1TTL0402818 SCREW TAPPING TR
18. 5E PROTECTOR MECH 340511 4051W3A001A RIVET ASSEMBLY 34370T 4370W1A011B SHAFT TURN TABLE 34810Q 4810W1A149A BRACKET MOUNT 34810T 4810W1A150C BRACKET LAMP 34890C 4890W1A045A GLASS 4890W4A001G 34930R 4930W1A069A HOLDER COOK AUXILIARY 34960A 4960W1A021B MOUNT 35026G 5026W1A048C SHELF 35230A 5230W1A012B FILTER MECH GREASE 5230W1A012A 35889A 5889W2A012F ROTATING RING ASSEMBLY 365498 6549W1S013K MOTOR CIRC SYNCHRONOUS 36549V 6549W1V006F MOTOR CIRC VENTILATION 36912C 6912W1Z004B LAMP DRAWING 6912W1Z002B 43500A 3500W1A028B BOARD LATCH 43501A 3501W1A019D BOARD ASSEMBLY LATCH 44510A 4510W3A012C LEVER 466001 6600W1K001D SWITCH MICRO D DI DI D D Dj DI Dj DI Dj Dj U U Dj Dj Dj DI U D DI Dj DI U DW Dj DI U D D Dy DI DI D D Dj Dj D 221 D D DI D D D D 20 201 U 6600W1K004C SERVICE PARTS LOC NO PART NO DESCRIPTION ep lt ALTERNATE 466001 6600W1K001D SWITCH MICRO 6600W1K003D 466003 6600W1K001C SWITCH MICRO 6600W1K004B 466003 6600W1K001C SWITCH MICRO 6600W1K003C 50CZZH OCZZW1H004B CAPACITOR DRAWING HIGH VOLTAGE OCZZW1H004G 50CZZH OCZZW1H004B CAPACITOR DRAWING HIGH VOLTAGE OCZZW1H002H 50CZZH OCZZW1H004B CAPACITOR DRAWING HIGH VOLTA
19. 6170D 6170W1D119E TRANSFORMER HIGH VOLTAGE 6170W1D119A 56170D 6170W1D119E TRANSFORMER HIGH VOLTAGE 6170W1D119C 50CZZH OCZZW1H004B CAPACITOR DRAWING HIGH VOLTAGE OCZZW1H004G 50CZZH OCZZW1H004B CAPACITOR DRAWING HIGH VOLTAGE OCZZW1H001Q 50CZZH OCZZW1H004B CAPACITOR DRAWING HIGH VOLTAGE OCZZW1H002H 50FZZA 3B74133Q FUSE DRAWING 3B74133K 53300A 3300W1A003D PLATE BOTTOM 53300B 3300W1A045C PLATE BOTTOM 53550F 3550W1A126B COVER STIRRER FAN 53550L 3550W1A189A COVER LAMP 53740A 3740W1A011B PROTECTOR MECH 54810A 4810W1A305B BRACKET THERMOSTAT 54810C 4810W1A313A BRACKET CAPACITOR 54930F 4930W1A068A HOLDER STIRRER FAN 55231C 5230W1A011A FILTER MECH CHARCOAL 2B72706D 55231C 5230W1A011A FILTER MECH CHARCOAL 5230W1A011B 55262A 5208W0A006C DUCT 55892A 5892W1A003A FAN 56201A 2B72130F FILTER ASSEMBLY CIRC 6201W1A014B 56201A 2B72130F FILTER ASSEMBLY CIRC 6201W1A014E 56324A 2B71165R MAGNETRON 2B71165P 56411A 6411W1A019M POWER CORD ASSEMBLY 56804A 6620G00007A 56804 6620G00007A SOCKET CIRC LAMP 56851D 6021W3B001S CABLE ASSEMBLY 6021W3B001G 56851D 6021W3B001S CABLE ASSEMBLY 6851W1A002B 568771 6877W1A597N
20. 69126 6912W1Z004B LAMP DRAWING 43500A 3500W1A028B BOARD LATCH 43501A 3501W1A019D BOARD ASSEMBLY LATCH 44510A 4510W3A012C LEVER 466001 6600W1K001D SWITCH MICRO D DI DI U D Dj DI Dj Dj Dj Dj DI U D Dj Dj DI U D DI DI U U D Dj DI U D D 22 DI DI D D Dj Dj D 221 D DI DI D D D D 20 201 U 6600W1K004C SERVICE PARTS LOC NO PART NO DESCRIPTION ep lt ALTERNATE 466001 6600W1K001D SWITCH MICRO 6600W1K003D 466003 6600W1K001C SWITCH MICRO 6600W1K003C 466003 6600W1K001C SWITCH MICRO 6600W1K004B 50CZZH OCZZW1H004B CAPACITOR DRAWING HIGH VOLTAGE OCZZW1H004G 50CZZH OCZZW1H004B CAPACITOR DRAWING HIGH VOLTAGE OCZZW1H002H 50CZZH OCZZW1H004B CAPACITOR DRAWING HIGH VOLTAGE OCZZW1H001Q 50FZZA 3B74133Q FUSE DRAWING 3B74133K 53300A 3300W1A003D PLATE BOTTOM 53300B 3300W1A045C PLATE BOTTOM 53550F 3550W1A126B COVER STIRRER FAN 53550L 3550W1A189A COVER LAMP 53740A 3740W1A011B PROTECTOR MECH 54810A 4810W1A305B BRACKET THERMOSTAT 54810C 4810W1A313A BRACKET CAPACITOR 54930F 4930W1A068A HOLDER STIRRER FAN 55231C 5230W1A011A FILTER MECH CHARCOAL 2B72706D 55231C 5230W1A011A FILTER MECH CHARCOAL 5230W1A011B 55262A 5208W0A006C DUCT 55892A 5892W
21. A 3052W1A002A CANOPY RESIN 33112U 3112W0U052N OUT CASE U BENDING 33390G 1B71961H TRAV GLASS 33531A 353181A001A GRILLE ASSEMBLV 33550L 3550W3A095C COVER LAMP 33740A 3740W1A005E PROTECTOR MECH 340511 4051W3A001A RIVET ASSEMBLY 34370T 4370W1A011B SHAFT TURN TABLE 34810Q 4810W1A149A BRACKET MOUNT 34810T 4810W1A150D BRACKET LAMP 34890C 4890W1A045A GLASS 34930R 4930W1A069A HOLDER COOK AUXILIARY 34960A 4960W1A021B MOUNT 35026G 5026W1A048C SHELF 35230A 5230W1A012B FILTER MECH GREASE 5230W1A012A 35889A 5889W2A012F ROTATING RING ASSEMBLY 365498 6549W1S013K MOTOR CIRC SYNCHRONOUS 36549V 6549W1V006F MOTOR CIRC VENTILATION 36912C 6912W1Z004B LAMP DRAWING 43500A 3500W1A028B BOARD LATCH 43501A 3501W1A019D BOARD ASSEMBLY LATCH 44510A 4510W3A012C LEVER 466001 6600W1K001D SWITCH MICRO 6600W1K004C 466001 6600W1K001D SWITCH MICRO D DI DI U D Dj DI Dj DI Dj Dj DI U D Dj Dj DI U DW DI U 22 U D Dj DI D D D 22 DI DI D D Dj Dj D 221 D D DI D D D D 20 201 U 6600W1K003D SERVICE PARTS LOC NO PART NO DESCRIPTION ep lt ALTERNATE 466003 6600W1K001C SWITCH MICRO 6600W1K003C 466003 6600W1K001C SWITCH MICRO 6600W1K004B 5
22. CN1 Figure 1 4 Remove 5 screws securing the circuit board Circuit Board Figure 2 b Remove the FPC connector from the terminal socket following HOW TO REMOVE THE FPC CONNECTOR on the next page 6 Remove the circuit board from the control bracket carefully Control Bracket FPC Connector S1 Circuit Board Figure 3 HOW TO REMOVE THE CONNECTOR Follow the steps below as illustrated in Figures 4 and 5 to remove the F P C connector 1 Hold the edges of the plastic fastener with thumb and forefinger Figure 4 2 Lift up the lever of the plastic fastener from the terminal socket by lightly pressing the lever end with forefinger Figure 5 3 Remove the F P C connector from the terminal socket Plastic fastener Connector Terminal socket Figure 4 Plastic fastener Connector Terminal socket Figure 5 HOW TO INSERT THE CONNECTOR Follow the steps below as illustrated in Figures 6 and 7 to insert the F P C connector 1 Insert the F P C connector into the terminal Socket securely with the fingers 2 Hold the plastic fastener with thumb and forefinger of the other hand and push it slowly into the terminal socket Figure 6 NOTE When reconnecting the F P C connector make sure that the holes on the F P C connector are properly engaged with the hooks on the plastic fastener Lock the level of the plasti
23. GE OCZZW1H001Q 50FZZA 3B74133Q FUSE DRAWING 3B74133K 53300A 3300W1A003D PLATE BOTTOM 53300B 3300W1A045C PLATE BOTTOM 53550F 3550W1A126B COVER STIRRER FAN 53550L 3550W1A189A COVER LAMP 53740A 3740W1A011B PROTECTOR MECH 54810A 4810W1A305B BRACKET THERMOSTAT 54810C 4810W1A313A BRACKET CAPACITOR 54930F 4930W1A068A HOLDER STIRRER FAN 55231C 5230W1A011A FILTER MECH CHARCOAL 2B72706D 55231C 5230W1A011A FILTER MECH CHARCOAL 5230W1A011B 55262A 5208W0A006C DUCT 55892A 5892W1A003A FAN 56170D 6170W1D119C TRANSFORMER HIGH VOLTAGE 6170W1D119A 56170D 6170W1D119C TRANSFORMER HIGH VOLTAGE 6170W1D119E 56201A 2B72130F FILTER ASSEMBLY CIRC 6201W1A014B 56201A 2B72130F FILTER ASSEMBLY CIRC 6201W1A014E 56324A 2B71165R MAGNETRON 2B71165P 56411A 6411W1A019M POWER CORD ASSEMBLY 56804A 6620G00007A SOCKET CIRC LAMP 56804A 6620G00007A SOCKET CIRC LAMP 56851D 6021W3B001S CABLE ASSEMBLY 6021W3B001G 56851D 6021W3B001S CABLE ASSEMBLY 6851W1A002B 568771 6877W1A597N HARNESS 56912B 6912W1Z004A LAMP DRAWING 56930V 6930W1A003E THERMOSTAT 6930W3A001S 63300M 3300W0A030A PLATE MOUNTING 63302A 3302W0A047M BASE PLATE 63303A 3303W1A072N
24. HARNESS 56912B 6912W1Z004A LAMP DRAWING 56930V 6930W1A003E THERMOSTAT 6930W3A001S 63300M 3300W0A030A PLATE MOUNTING 63302A 3302W0A047H BASE PLATE 63303A 3303W1A072L BASE PLATE ASSEMBLY 63861A 3861W1A043A KIT ASSEMBLY 65862B 4810W1A151A BRACKET MISC 65862D 4900W1A001B DAMPER WMTO24 1MTCO403019 SCREW MACHINE TRUSS HEAD WSZ002 1SBF0402418 SCREW TAP TITE S BINDING HEAD WSZ085 4B70188C SCREW DRAWING WTP013 1TPL0402418 SCREW TAPPING PAN HEAD WTP015 1TPL0402618 SCREW TAPPING PAN HEAD WTP018 1TPL0402818 SCREW TAPPING PAN HEAD WTT010 1TTG0402422 SCREW TAPPING TRUSS HEAD WTTO20 1TTL0402416 SCREW TAPPING TRUSS HEAD WTTO21 1TTL0402418 SCREW TAPPING TRUSS HEAD WTT028 1TTL0402818 SCREW TAPPING TRUSS HEAD WTT029 1TTL0402822 SCREW TAPPING TRUSS HEAD DD U U D D DI Dj DI Dj Wy U U Dj DI Dj DI 2 D DI U DI 2 DI DI DI U U DI 22 DI DI D D Dj 22 D 221 D Dy DI D D D D D D D SERVICE PARTS
25. LACEMENT PARTS LIST FOR MODEL LMV1630WW WHITE PART NO DESCRIPTION Rev 1 Feb 21 2006 ALTERNATE 01 3828W5A8536 MANUAL OWNERS 02 38288550009 MANUAL SERVICE 04 3828W5U0529 MANUAL INSTALLATION 05 3850W1D069G LABEL COOKING GUIDE 06 1 4922W5A057B TEMPLATE 06 2 4922W5A060B TEMPLATE 07 3840W1T006F CARD TECHNICAL 10 3890W3Y924H BOX YELLOW 13213A 3213W1A049F DOOR FRAME ASSEMBLV 13536A 3536W1A012B SEAL TAPE 13552A 3552W1A032H CHOKE COVER 13581A 3581W0A155A DOOR ASSEMBLV 136501 3650W1A184A HANDLE DOOR 136502 3650W1A185A HANDLE DOOR 136503 3650W1A189G HANDLE DOOR 13720D 3720W0D414A PANEL DOOR 14026A 4026W2A019C LATCH 14890A 4890W1A065T GLASS 14970A 4970WRA001G SPRING 20CZZH OCZZW1M001C CAPACITOR DRAWING MOTOR CONDENSER 23506A 350681A003A KEY MEMBRANE 23572A 3720W0C305A PANEL CONTROL 24781M 4781W1M463A CONTROLLER ASSEMBLY KEY PAD 24810P 4810W1A401A BRACKET CONTROL PANEL 268711 6871W1A497A PWB PCB ASSEMBLY SUB 33052A 3052W1A002A CANOPY RESIN 33112U 3112W0U052M OUT CASE U BENDING 33390G 1B71961H TRAV GLASS 33530A 3530W0A055A GRILLE VENT 33550L 3550W3A095C COVER LAMP 33740A 3740W1A00
26. ROCEDURES on page 7 12 when the primary interlock secondary interlock switches and or the interlock monitor switches are adjusted or replaced 2 CHECKOUT PROCEDURES FOR RELAY PROBLEM A FAN motor turns on without touching START key PROBLEM Oven lamp turns on without touching START key when the door is closed E when the door is closed Remove the mate connector of I O CON from the circuit board Does the unit still operate YES GOOD je LE Defective Replace the circuit board Replace Wire Assembly Wire Assembly Remove the mate connector of I O CON from the circuit board Does the unit still operate YES pe Defective Wire Assembly YES GOOD Replace the circuit board Replace Wire Assembly PROBLEM B FAN motor turns on When the door is closed and PROBLEM B Oven lamp turns on When the door is closed and START key is touched YES Measure the voltage at pin NO 1 4 of CN1 Voltage reading 120 V AC pe ps Replace the Defective circuit board FAN motor Replace FAN motor START key is touched YES p Measure the voltage at pin NO 1 4 of CN1 Voltage reading 120 V AC ud ka Replace the Defective circuit board Oven lamp Replace Oven lamp
27. ROST COOK KITCHEN HOLD TIME GLOCK TIMER WARM 3 START SOFTEN MELT 1 4 2 5 7 8 9 C CLEAR 0 LESS POWER TURNTABLE LEVEL ON OFF EZ ON VENT LIGHT HI LOW OFF HI LOW OFF 44 GO amp CONTROL PANEL INSTRUCTIONS 1 DISPLAY The Display includes a clock and indicators to tell you time of day cooking time settings and cooking functions selected COOK Touch this pad to cook fresh vegetable frozen vegetable rice or casseroles REHEAT Touch this pad to reheat dinner plate soup sauce casserole roll muffin KIDS MEAL Selects type of dish to reheat hot dog baby food oat meal or soup AUTO DEFROST Meat poultry fish Touch this pad to select food type and defrost food by weight QUICK DEFROST This pad provides you with the RAPID defrosting method for 1 0 pound frozen foods 7 TIME COOK Touch this pad to set a cooking time 8 CLOCK Touch this pad to enter the time of day 9 NUMBER Touch number pads to enter cooking time power level quantities or weights 10 MORE Touch this pad to add ten seconds of cooking time each time you press it 11 POWER LEVEL Touch this pad to select a cooking power level 12 LIGHT HI LOW OFF Touch this pad to turn the Vent on or off 13 HOT WATER Touch this pad when heating water in your microwave oven 4 2 14 15 16 17 18 19 20 21 22 23
28. S TO BE SERVICED ONLY BY PROPERLY QUALIFIED SERVICE PERSONNEL INSTALLATIONS BEFORE YOU BEGIN READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY PRECAUTIONS ON INSTALLATION A Plug the power supply cord into a 120V AC 60Hz single phase power source with a capacity of at least 20 amperes B Avoid placing the unit in a location where there is direct heat or splashing water C Install the unit on the mounting plate firmly D Place the unit as far away as possible from TV radio etc to prevent interference GROUNDING INSTRUCTIONS For personal safety this appliance must be fully grounded at all times In the event of an electrical short circuit grounding reduces the risk of electrical shock The plug must be plugged into an outlet that is properly installed and grounded CAUTION This unit is equipped with a 3 prong plug for your safety If the wall outlet is a grounded 3 hole type the unit will be grounded automatically Plug with Ground Prong Properly Polarized and Grounded Outlet WARNING Improper use of the grounding plug can result in a risk of electric shock Do not under any circumstances cut or remove the third ground prong from the power cord plug 3 1 GGG Of e OPERATING INSTRUCTIONS CONTROL PANEL AUTO TOUCH COOK REHEAT POPCORN HOTWATER KIDS MEAL HOTDOG SOUP OATMEAL BABY FOOD AUTO QUICK DEFROST DEF
29. USS HEAD D DI DI U D Dj DI U DI Dj Wy U U Dj DI Dj DI 2 D DI U DI 2 DI DI DI U D DW DW DI DI 221 D Dj 22 D 221 DI DI DI D D D D D 201 U WTT029 1TTL0402822 SCREW TAPPING TRUSS HEAD SERVICE PARTS LOC NO REPLACEMENT PARTS LIST FOR MODEL LMV1630ST STAINLESS PART NO DESCRIPTION Rev 1 Feb 21 2006 ALTERNATE 01 3828W5A8536 MANUAL OWNERS 02 38288550009 MANUAL SERVICE 04 3828W5U0529 MANUAL INSTALLATION 05 3850W1D069G LABEL COOKING GUIDE 06 1 4922W5A057B TEMPLATE 06 2 4922W5A060B TEMPLATE 07 3840W1T006F CARD TECHNICAL 10 3890W3Y924K BOX YELLOW 13213A 3213W1A049F DOOR FRAME ASSEMBLY 13536A 3536W1A012B SEAL TAPE 13551A 383EW5A334B SERVICE PARTS 13552A 3552W1A032H CHOKE COVER 13581A 3581W0A155C DOOR ASSEMBLV 136501 3650W1A184C HANDLE DOOR 136502 3650W1A185C HANDLE DOOR 136503 3650W1A179C HANDLE DOOR 14026A 4026W2A019C LATCH 14890A 4890W1A065U GLASS 14970A 4970WRA001G SPRING 20CZZH OCZZW1M001C CAPACITOR DRAWING MOTOR CONDENSER 23551A 478181A001A CONTROLLER ASSEMBLY SUB 24781M 4781W1M463C CONTROLLER ASSEMBLY KEY PAD 24810P 4810W1A401A BRACKET CONTROL PANEL 268711 6871W1A497A PWB PCB ASSEMBLY SUB 33052
30. Website http us Igservice com LG MICROWAVE OVEN MODEL LMV1630WW LMV1630BB LMV1630ST CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL January 2006 P NO 38288580009 Printed in Korea CAUTION WARNING TO SERVICE TECHNICIANS PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY Do not operate or allow the oven to be operated with the door open 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 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 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 A Microwave leakage check to verify compliance with the Federal performance standard should be performed on each oven prior to release to the owner Proper operatio
31. Y LEAKAGE body of the switches in the following sequence Make sure the microwave energy leakage is below the Primary Interlock Switch limit of 1mW cm with a 275 ml water load and Secondary Interlock Switch 5mW cm with a 275 ml water load without the cabinet when measured with a survey meter Interlock Monitor Switch Adjust the latch board until the switches operate in this sequence See Steps 3 and 4 6 Close the oven door slowly and be sure it is tightly closed Watch the three switches to make sure they are zero to the body of the switches in the following sequence Interlock Monitor Switch Primary Interlock Switch Secondary Interlock Switch NOTE The Interlock Monitor Switch is an added safety check on the Primary and Secondary Interlock Switches If the Primary and Secondary Interlock Switches allow the oven to operate with the door open the Monitor Switch will blow the fuse 7 12 INTERLOCK CONTINUITY TEST A PRIMARY INTERLOCK SWITCH TEST B SECONDARY INTERLOCK SWITCH TEST When the door is opened slowly an audible click Disconnect the wire lead from the secondary should be heard at the same time or successively switch at intervals and the latches should activate the Connect the ohmmeter leads to the common switches with an audible click COM and normally open NO terminals of the If the latches do not activate the switches when the switch The meter should indicate a open circuit in door is closed the s
32. avoided because it will disrupt cooking and may cause arcing However small pieces may be used to cover some parts of food to slow the cooking Any aluminum foil used should never be closer than 2 5 cm to any side wall of the oven TRIAL OPERATION After installation the following sequences and results should be checked carefully A B Put a container filled with water about 1 liter into the oven and close the door tightly Set cooking time for 10 minutes by touching 1 and then 0 three times 1 0 0 0 appears in the display window Touch the START key Make sure the cavity light comes on The unit will begin cooking and the display window will show the time counting down by seconds After about 5 minutes make sure the primary interlock switch the secondary interlock switch and the interlock monitor switch operate properly by opening and closing the door several times Touch the START key each time the door is closed Continue operating the unit Two short and a long beep sound signal is heard when the time is up The unit will shut off automatically Confirm the water is hot Finally measure the output power according to POWER OUTPUT MEASUREMENT on page 7 3 6 1 FEATURES AND SPECIFICATIONS FEATURES A The safety systems incorporated in this model are 1 Primary interlock switch 2 Secondary interlock switch Interlock monitor switch Choke system Oven cavity t
33. c fastener into the hook of the terminal socket securely by releasing the fingers Figure 7 Plastic fastener Connector Terminal Socket Figure 6 Plastic fastener Terminal socket Figure 7 B REMOVING THE OUT CASE Figure 8 1 Remove the vent grille by removing two screws securing it to the out case Remove two screws securing it to the air duct Remove the mounting plate by turning the screws 1 or 2 screws securing it to the out case Remove two screws on the left central edge and one screw on the right central edge of Base plate Remove the Mount All from the out case by removing one screw securing it to the out case Remove six screws of the rear cavity Remove the outcase 2 we 4 Du Mount All Power cord cover Mounting Plate Out Case Vent Grille Figure 8 7 6 C REMOVING THE DOOR INTERLOCK SWITCHES Figures 9 10 1 Disconnect the wire leads from the interlock switches 2 Remove two screws securing the Latch Board 3 Make necessary replacements and check microwave energy leakage according to ADJUSTMENT PROCEDURES on page 7 12 Latch Board Monitor Interlock Switch Figure 10 SYMBOL COLOR WH WHITE BK BLACK BR BROWN RD RED YL YELLOW PK JPINK BL BLUE GY GREY GN GREEN N P Not Provided 7 7 Latch Board Primary Interlock Switch
34. cted so that the maximum difference between the final water temperature and the ambient temperature is 5 K 6 The microwave power output P in watts is calculated from the following formula NOTE WHEN MEASURING 1 Do not exceed meter full scale deflection 2 The test probe must be removed no faster than 1 inch sec 2 5cm 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 possibly cause probe damage 3 4 RECORD KEEPING AND NOTIFICATION AFTER MEASUREMENT 1 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 Should the microwave energy leakage not be more than 1 mW cm 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 2 3 lt 4 187 Mw T2 T1 0 55Me T2 t is measured while the microwave generator
35. en at 90 C 5 C Close at 0 C 5 C Fuse 20A Primarv Interlock Switch Secondarv Interlock Switch Interlock Monitor Switch Magnetron 2M214 161GP Cook top Lamp 120 V 3S0W Cavity Lamp 125 V 30 W or 40 W Timer i teen es Digital up to 99 min 99 sec in each cooking stage MAY Tempered Safety Glass Overall Dimensions 2915 16 W x167 16 H x17 8 D Oven Cavity Size 207 8 W x93Ae H x143Ae D Effective Capacity of Oven Cavity 1 6 Accessories Owner s Manual amp Cooking Guide Installation Manual Exhaust Adapter Exhaust Damper Mounting Kit and Filter Glass Tray Metal Rack Rotating Ring Assembly SWITCH CHART PRIMARY SECONDARY INTERLOCK SWITCH MODE INTERLOCK INTERLOCK MONITOR SWITCH SWITCH SWITCH COM COM COM CONDITIONS NO NO NC DOOR OPEN OPEN OPEN CLOSE DOOR CLOSED CLOSE CLOSE OPEN NOTE Use the above switch chart with circuit diagram on page 5 1 1 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 during repair DO NOT operate on a 2 wire extensi
36. hermostat Note This thermostat located on the oven cavity will open and stop the unit from operation only if a high temperature is reached such as a fire created by overcooking food woe 3 4 5 Any one of 10 power output levels ranging OW to 1000W can be selected by the touch control and electronic computer system Cooking time can be displayed on the digital readout Three different cooking stages Include Defrost can be changes from one cooking stage to another This is made possible with the memory function of the microprocessor SERVICE INFORMATION PRECAUTIONS AND REPAIR SERVICE TIPS PRELIMINARY A SINCE NEARLY 4000 VOLTS EXISTS IN SOME CIRCUITS OF THIS UNIT REPAIRS SHOULD BE CARRIED OUT WITH GREAT CARE The filament leads of magnetron carry High Voltage with respect to ground Extreme caution must be exercised Never plug the unit into a power source to determine which component is defective in high voltage section B TO AVOID POSSIBLE EXPOSURE TO MICROWAVE ENERGY LEAKAGE THE FOLLOWING PRECAUTIONS MUST BE TAKEN BEFORE SERVICING 1 Before the power is applied a Make sure the primary interlock switch the secondary interlock switch and the interlock monitor switch operate properly by opening and closing the door several by opening and closing the door several times b Make sure the perforated screen and the dielectric choke of the door are correctly and firml
37. ight T T HOLD COOK POWER QUICK Hi Low Off Hi Low Off ON OFF WARM TIME LEVEL DEFROST i RZE 4 e E FPC CONNECTOR Top 1 n 3 4 z gt 9 10 7 13 NOTES AMICROWAVE ENERGY 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 B CHECKOUT PROCEDURES 1 CHECKOUT PROCEDURES FOR FUSE BLOWING CAUTION REPLACE BLOWN FUSE WITH 20 AMPERE FUSE PROBLEMS CAUSES Fuse blows immediately after the door is closed Improper operation of the primary interlock secondary Fuse blows immediately after interlock switches and or the interlock monitor switch the door is opened Fuse blows when the door is closed and START Malfunction of the high voltage transformer the high key is touched voltage capacitor including the diode the magnetron the blower motor or the circuit board NOTES e the fuse is blown by an improper switch operation replace all switches and the fuse at the same time After replacing the defective switches with new ones make sure that they are correctly connected Check for microwave energy leakage according to INTERLOCK ADJUSTMENT P
38. is operating at full power Magnetron filament heat up time is not included about 3 sec 7 The water is stirred to equalize temperature throughout the vessel prior to measuring the final water temperature 8 Stirring devices and measuring instruments are selected in order to minimize addition or removal of heat P Where P is the microwave power output in watts Mw is the mass of the water in grams Mc is the mass of the container in grams is the ambient temperature C T1 is the initial temperature of the water in C T2 is the final temperature of the water in C tis the heating time in seconds excluding the magnetron filament heat up time WATER LOAD TURNTABLE DISASSEMBLY INSTRUCTIONS IMPORTANT NOTES UNIT MUST BE DISCONNECTED FROM ELEC TRICAL OUTLET WHEN MAKING REPAIRS RE PLACEMENTS ADJUSTMENTS AND CONTIN UITY CHECKS WHEN RECONNECTING THE WIRE LEADS TO ANY PART MAKE SURE THE WIRING CONNE CTIONS AND LEAD COLORS ARE CORRECTLY MATCHED ACCORDING TO THE OVERALL CIR CUIT DIAGRAM ESPECIALLY SWITCHES AND HIGH VOLTAGE CIRCUIT A REMOVING POWER AND CONTROL CIRCUIT BOARD Figures 1 2 and 3 1 Remove a screw securing the control panel assembly to the oven cavity 2 Remove the control panel with pushing it upward 8 Remove the connectors CN1 and wire leads RY7 from the circuit board Circuit Board Power Transformer
39. n of the microwave ovens requires that the magnetron be assembled to the wave guide 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 Routine service safety procedures should be exercised at all times Untrained personnel should not attempt service without a thorough review of the test procedures and safety information contained in this manual FOREWORD Read this Manual carefully Failure to adhere to or observe the information in this Manual may result in exposing yourself to the Microwave Energy normally contained within the oven cavity TABLE OF CONTENTS Page SAFELY PREGAUTIONS 3 ha Sanii Inside front page SPECIFICATION S sar rrt D e e RE Toe a RR Re RM ERE D HERR 1 1 CAUTIONS EE 2 1 INSTAEEATIONS irit rtr ete tru xac au 3 1 OPERATING INSTRUCTIONS cuisine E RR EMERGERE OT RUE 4 1 CONTROLPANEL ilaele abside se 4 1 CONTROL PANEL INSTRUCTIONS iii 4 2 OVERALL CIRCUIT DIAGRAM iii 5 1 SCHEMATIC DIAGRAM EG e i e od e e a ren 5 1 MATRIX CIRCUIT FOR TOUCH KEY BOARD 5 2 GENERAL INFORMATION FOR 8 6 1 GENERAL PRECAUTIONS IN USE 6 1 mE 6 1 FEATURES AND
40. on 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 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 2 1 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 MAGNETRON CHASSIS GROUND FILAMENT TERMINALS MAGNETRON THE OVEN I
41. position Check that the seal is in good condition 2 Measure resistance ohm meter scale Rx1 e Filament terminal 3 Measure resistance ohm meter scale Rx1000 e Filament to chassis Normal Less than 1 ohm Normal Infinite 7 14 COMPONENTS TEST s Remove wire leads RESULTS CAPACITOR 2 Measure resistance ohm meter scale Rx1000 Terminal to terminal Normal CO Momently indicates zs several ohm and then gradually returns to infinite Terminal to case Normal Infinite 00 0 R DIODE 1 Measure continuity Forward Normal Continuity Some inexpensive ohm ohm meter scale Rx1000 Abnormal Infinite meters may indicate infinite resistance in both directions AZ 2 Measure continuity Reverse Normal Infinite ZY ohm meter scale Rx1000 Abnormal Continuity 2 TR RELAY 2 1 Measure continuity Power ohm meter scale Rx1 Level Open Close 2 Remove the lead wires and operate oven at 1 4 Sec 18 Sec power level 1 through power level 10 2 6 Sec 16 Sec 3 8 Sec 14 Sec 4 10 Sec 12 Sec 5 12 Sec 10 Sec 6 14 8 Sec 7 16 6 8 18 Sec 4 Sec 9 120 8 2Sec 10 22Sec OSec FAN MOTOR 1 Remove wire leads Normal Approximatelv 2 Measure resistance ohm meter scale Rx1 Terminal 85 to 105 ohms Terminal 8 15 to 25 ohms Abnormal Infinite or several COMPONENTS
42. r of the microwave oven is removed 1 Set the microwave oven on its side so that you can see the latch board and the switches as shown in Figure 23 a 2 Close the door tightly and check gaps A and B to be sure they are no more than 1 64 0 5 mm See Figure 23 b for close up view of gaps A and B door latches If all gaps are less than 1 64 0 5 mm adjustment of the latch board may not be necessary Go to Steps 5 and 6 to check the sequence of the switches NOTE To correct sequence of the Primary Interlock Switch Secondary Interlock Switch and the Interlock Monitor Switch is very important If any gap is larger than 1 64 0 5 mm you will need to adjust the latch board Go to step 3 and follow all steps in order ADJUST THE LATCH AND SWITCH CLOSING 8 Loosen the two screws holding the plastic latch board as shown 4 With the oven door closed tightly move the latch board upward toward the top of the oven and or away from the door latch until the gaps are less than 1 64 0 5 mm Hold the latch board tightly in this position until you check the sequence of the switches in steps 5 and 6 TEST THE LATCH AND SWITCH SEQUENCE 7 When you achieve the proper sequence of switches in Steps 5 and 6 tighten the latch board 5b Open the oven door slowly Watch the door latch screws at that point the Secondary Switch Release Rod and Lever on the switches to make sure they are zero to the TEST THE MICROWAVE ENERG
43. the outer panels 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 NOTES Leakage with the outer panels removed less than 5 mW cm Leakage for a fully assembled oven Before the latch switch primary is interrupted with the door in a slightly opened position less than 1 mW cm 55 POWER OUTPUT MEASUREMENT 1 Microwave power output measurement is made with the microwave oven supplied at its rated voltage and operated at its maximum microwave power setting with a load of 1000 5 g of potable water 2 The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 1 8 3 mm and an outside diameter of approximately 7 6 190mm 8 The oven and the empty vessel are at ambient Temperature TO prior to the start of the test 4 The initial temperature T1 of the water is 10 1 C 50 F 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 5b The time t for the temperature of the water to rise by a value T of 10 1 K is measured where t is the time in seconds and T is the temperature rise The initial and final water temperatures are sele
44. witches should be a adjusted the door open condition When the door is closed in accordance with the adjustment procedure meter should indicate an closed circuit When the Disconnect the wire lead from the primary switch secondary switch operation is abnormal make the Connect the ohmmeter leads to the common necessary adjustment or replace the switch only COM and normally open NO terminal of the with the same type of switch switch The meter should indicate an open circuit in the door open condition C MONITOR SWITCH TEST 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 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 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 COMPONENTS TEST PROCEDURE RESULTS SWITCHES Check for continuity of the Door Wire leads removed switch with an Ohm meter open Primary Switch ZA Monitor Switch ae Secondary Switch EN
45. y mounted 2 After power is applied a Make sure the interlock switch mechanism is operating properly by opening and closing the door b Check microwave energy leakage must be below the limit of 5 mW cm All service adjustments should be made for minimum microwave energy leakage readings 7 1 3 Do not operate the unit until it is completely repaired if any of the following conditions exist The unit must not be operated a The door does not close firmly b The hinge is broken c The door seal is damaged d The door is bent or warped or there is any other visible damage on the unit that may cause microwave energy leakage NOTE Always keep the seal clean e Make sure that there are no defective parts in the interlock mechanism f Make sure that there are no detective parts in the microwave generating and transmission assembly especially waveguide 4 The following items should be checked after the unit is repaired a The interlock monitor switch is connected correctly and firmly b The magnetron gasket is properly positioned and mounted c The waveguide and the oven cavity are intact no microwave energy leakage d The door can be properly closed and the safety switches work properly e The unit must stop when the door is opened or the time is up The unit must not be operated with any of the above components removed or by passed MICROWAVE LEAKAGE TEST CAUTIONS
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