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Contents
1. PON FORWARD REVERSE SMALL 1 lt Transistor NPN Transistor T FORWARD REVERSE SMALL mc ec SMALL 5 250 ce FORWARD REVERSE PNP Transistor SMALL SMALL FORWARD REVERSE ES 310k0 m 40 282 EXPLODED VIEW AND PARTS LIST 080 oZe s ae 5 115 NOTE 1 When ordering replacement part s please use part number s shown in this parts list Do not use description of the part 2 Important safety notice Components identified mark have special characteristics important for safety When replacing any of these components use only manufacturer s specified parts 3 Alphabet marks in Remarks colums HNE etc indicate parts applicable to only models as follows JPG For New Zealand YNG For Singapore For Malaysia For Australia For Hong Kong VPE For South Africa elc TNE For Thailand Indonesia Parts without these marks can be used for all models Ref No Part No Part Name amp Description ES Remarks T 100654600 CAUTION LABEL Y A00065540MN CAUTION2. No beep tone sting OPERATION DISPLAY OPERATION DISPLAY Open the door ard aka water ad Press FROG pao aga Display stops blinking n You completed programming the 2 a tone option bE EP 7 Goss te doo wil rotura tane vis ttr he wi ren t ator niue E u 6 To Read Cycle Counter 8 To Lock Program of Memory Pad OPERATION DISPLAY OPERATION DISPLAY T Open the door and wave Lope Pug the power supply corn wall recepaco Display must bo ban 2 wile pressing STOFIRESET a 2 Pross ara oid he FROG pad press POWER LEVEL 1 display shows P and L 46 0010 ine oven has boon nn in Approximately 8 seconds used 1 000 mes LU Iu NOTE When oven sin program lock 9909 moans ne oven has been used deploy wi not show m anything and ramain bai iy 1 22 n 7 To Select Beep Tone Options ON OFF of Tone OPERATION DIBPLAY To Release the Memory Pad Program Lock OPERATION DISPLAY T Pag he power supply 2 Press PROG pod i 0 age STOF RESET pad press and hold in gt PROG pad unt tn shows 2 Press 2 b EP Approximately 6 seconds Eo NOTE When oven In program mode vit not P 4 Press p
3. 9 370 Ret No Part No D ipti Pes 8 Description RES Remarks Di XYEANERICIBT SCREW 2 02 DOOR BTU T D3 A30013700AP DOOR A 0 id Da 3005370085 UPPER HINGE 1 55 302 37008 DOOR E 1 06 130181480 DOOR KEY 1 07 23021400048 DOOR KEY SPRING 1 08 307031708 HANDLE PEICE A 1 1 09 0858860 ace 010 ANESIS4BUOAP HANDLE i Dii 31453708 DOOR SCREEN A TT 012 A31463700AP DOOR SCREEN 1T Di3 A32863700AP HANDLE SPACER 014 88 SCREW 2 8 015 XTNANE4 8BN SCREW 2 4X8 016 8 SCREW 2 ied ESCUTCHEON BASE ASSEMBLY NE 1037 9 8 370 Ref No Part No Part Name amp Description Set Remarks ET A603L37008P D P CIRCUIT 0 T ATL WICOMPONENT NE 037 JPGRNGOPGYNG A 60313700 D P CIACUIT 0 if RTL WICOMPONENT NE 1037 MNE TNENPE 2 A64793700QP MEMBRANE SWITCH 2 ABOON3700AP ESCUTCHEON A 1 4 A802537008P_ CUSHION RUBBER A 1 A80343700AP_ ESCUTCHEON BASE 1 1273700 BACK PANEL 1 A82843700BP SPACER CUSHION 1 E8 A83423700BP CUSHION RUBBER B 1 E9 A01726210JP CAUTION LABEL 1 NE 1037 JPG PACKING AND ACCESSORIES
4. continuity 8 Normal cold resistance readings should be as follows Secondary winding Approx 60 Q 1000 Filament winding Appox 00 Primary winding Approx 0Q 20 2 High voltage capacitor A Check continuity of capacitor with mater on highest OHM scale 8 A normal capacitor show continuity for short tme and thon indicate once the capacitor is charged C A shorted capacitor wil show continuous continuity D An open capacitor will show constant E Resistance between each terminal and chassis should be infinite 3 Magnetron Continuity checks can only indicate an open filament or a shorted magnetron To diagnose for an open flament shorted magnetron HIGHEST HIGH VOLTAGE CAPACITOR SCALE 04 032M Isolate magnetron from the circuit disconnecting the leads 8 A continuity check across magnetron flament terminals should indicato one ohm or less A continuity check between each filament terminal and magnetron case should read open ANTENNA HIGHEST SCALE xi SCALE FILAMENT TERMINALS 4 Diode Isolate the diode from the circuit by disconnecting the leads 8 With the ohmmetar set on the highest resistance scale measure the resistance across the diode terminals Reverse the meter leads and again obs
5. DESCRIPTION OPERATING SEQUENCE 1 Variable power cooking control The of power relay B s energized intermittently by the digital programmer circuit when the oven set at any power selection except for High power position The digital programmer circuit controls the ON OFF time of power relay B contacts In order to vary the output power ofthe microwave oven from Low High power One companies ON and OFF cycle of power relay B is 22 seconds The relation between indications on the control panel and the output of the microwave oven is as shown in table NOTE The ON OFF time ratio does not correspond with the percentage of microwave power since approximately 2 seconds are required for heating of magnetron filament ON OFF TINE OF m POWER SETTING POWER W FOWERBELAY E RY wmm 1 705 88 iest procedure Specifications subject to change without notice CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING Unlike many other appliances the microwave ovan is high voltage high current equipment Though it is free from danger in ordinary use extreme care should be taken during repair CAUTION Servicemen should remove their watches whenever working close to replacing the magnetron 1 Check the grounding Do not operate on 2 wire extension cord The microwave oven is designed to
6. memory was provouty e 200 Programmed he pad number anch level wl appsar in e d ER LEVEL pad 2 nes 3 4 Ses MED power m ee 1 The pad number and Stage Heating wil appear in the display again oe co Lng OPERATION DISPLAY OPERATION DRY gt PN Sets to MED power ud your setting program 3n u Press 3 B pads PROG 2 Sets to 30 seconds 5 n n 2 LL Coq mu CTUM 5 5 ER PITE Ca m apear inn 30 ri DEF fog oo 5 4 WEIT ao Heating Indicator and then the double n n been completed the display will heating time wil appear in he display bank Dyer blank 5 Memory Pad Heating OPERATION VP power sy ooo wa 4 Memory setting for 2nd stage OPERATION DSRUAY Vere s EA o Dyer for single stage E Place a water load in the oven and n c im worden 2 Press POWER LEVEL pad 3 times 3 Press 2 pad PROG 1 Sets defrost power for 2nd stage Sets for 2 minutes 3 1 BBB B nrn LL erm Tm beeps Display blinks zero He
7. ORDER NO MOD9706148C3 ice Manual Microwave Oven NE 1037 Specifications Power Source 220V _ 50 Hz single phase 230 V 240 V_50 Hz single phase Required Power 68A 1450W 66A 1490W Output HI high 950 W IEC705 high 1000 W IEC705 MED medium 480W MED medium _ 500W DEF defrost 340W DEF detrost 340W Frequency 2450 MHz Outer Dimensions W X D X H 510 mm X 360 mm X 306 mm Cavity Dimensions W X D X 330 mm X 330 mm X 200 mm Net Weight 18kg Shipping Weight 20 HI high 30 minutes MED medium 99 minutes 99 seconds DEF defrost 99 minutes 99 seconds Memory 10 Memory Pads with Double Quantity X2 Pad Specifications subject to change without notice Panasonic 197 Matsushita Electric Industrial AI rights reserved Unauthorized copying and distribution is violation of law A WARNING This service information is designed for experienced repair technicians only and is not designed for use by tha general public It does not Contain wamings or cautions to advise non technical individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in
8. used when grounded Its imperative therefore to sure itis grounded properly before beginning repair work 2 Warning about the electric charge in the high voltage capacitor For about 30 seconds after the oven is turned an electric charge remains in the high voltage capacitor When replacing or checking parts remove tha power plug from the outet and short tho terminal of ta high voltage terminal of lead wire from diode to chassis ground with an insulated handie Screwdriver to discharge WARNING There is high voltage present with high current capabilities in the circuits of the high voltage winding and filament winding of the high voltage transformer It is extremely dangerous to work on or near these circuits with oven energized DO NOT measure the voltage in the high voltage circuit including filament voltage of magnetron HIGH VOLTAGE CAPACITOR 1 003 Touch chassis side rel then shot tothe high voltage capacitor termina WARNING Never touch any circuit wiring with your hand nor with an insulated tool during operation 6 Confirm after repair A After repair or replacement of parts make sure that the screws of the oven ete are neither loose nor missing Microwaves might leak if screws are not propery tightened 8 Make sure that electrical connections are tight before inserting the plug into the wall outlet CAUTION MICROWAVE RADIATION DO NO
9. FR P7 P8 8 370 Ref No Part No Part Name amp Description Res Remarks 00033700 INSTRUCTION BOOK 1 JPGIOPQVPE A00033700HN INSTRUCTION BOOK 1 NE 1087 WNQYNOMNE 000337007 INSTRUCTION BOOK 3 NEWGTTNE P2 A01023700JP PACKING 5 1 NE1037 JPG P2 01023700MN PACKING CASE PAPER 3 2 010237000 PACKING CASE PAPER 3 NE 1037 GPO Pe 01023700 PACKING CASE PAPER 3 NE 1087 YNG P2 AO1023700HN PACKING CASE PAPER 3 P2 ADI023700TN PACKING CASE PAPER 1 NETOS TNE P2 01023700 8 PACKING CASE PAPER 1 1 0 7 AOT0437008P UPPER FILLER 1 010537008 LOWER FILLER 1 A01064830AP VINYL COVER 1 P6 107200 DOOR SHEET 1 PT 010837008 TRAY PACKING 42037000 OPERATING GUIDE 1 NEWS JPGIOFQVPE A04203700HN OPERATING GUIDE 1 NEST 40420370078 OPERATING GUIDE 1 NE 1037 TNE AD0324040XN EARTH CAUTION LABEL 1 etos TNE P10 A91644000XN__ EARTH LEAD 3 Near TNE WIRING MATERIAL MAGNETRON To chassis HIGH VOLTAGE CAPACITOR PROTECTOR DP ncc Second 000 1 fich VOLTAGE wa TRANS
10. E Power Level Indicator HI high MED medium DEF defrost 1 Manual Heating for Single Stage OPERATION PROCEDURE OPERATION DISPLAY OPERATION DISPLAY Plug the power supply cord wat pads m e101 LL 2 Open me door Press START pe ume or bat a water load in 1o ovon ana n sages ve dapayed 3 tna dor 3100 3 Press POWER LEVEL pad once Sets to HIGH power S When the fist stage tme sup you haar one beep sound nd stage un Logs 4 Press pads Suis to 2 minutes 6 When ne time is up you hear 5 beeps Display inks zero 5 Press START poa Sets to 2 minut 7 Open te door enc take out the water tad Display stops bring When tne tme s up you hear 5 Display inks zero 8 Cose the door 1 minute ater spay wit lum blank T Open the door ard ake cut he water Display stops tanking n 3 Memory Setting for Single Stage Operation 8 Oven not program lock mode OPERATION DISPLAY Cos Press PROG pas p 1 minuta Jalar splay etum NOTE Display must be bank to 2 Press ys 2 Manual Heating for 2nd Stage Sesto memory pad 5 5 OPERATION DISPLAY sup 1 o 4 tor st 2 Bn
11. LABEL T 1037 YNO E 000737007 NAME LABEL AO0078700MN NAME LABEL T NEATINGO A00073700QP NAME LABEL T REST GPO 3 A00073700YN NAME LABEL REWGTYNG 3 A00073700HN NAME LABEL 0378 3 A000737001N NAME LABEL 037 THE 3 A00073700VP NAME LABEL 3 NE 1037 VPE 22 4 A010T3700BP SHELF 1 5 A02840000MK NUMBER LABEL 1 NE 1037 VNO 6 2395708 CORD LABEL 3 NE 1037 MNOYNORNEITNE _ 6 239 00 CORD LABEL 1 1037 VPE 9 200006 CUSHION RUBBER B T 8 ANEOS21000AH CUSHION RUBBER C T 9 ANE0921000JK CUSHION RUBBER 1 002000 CUSHION RUBBER 2 22 ANEO962000A0 CUSHION RUBBER D 11 096300080 CUSHION RUBBER D T 10013700 BASE 11 1008 1180 RUBBER FOOT 747 A100837008P CABINET BODY 0 1 A104037008P REINFORCE BRACKET T 10493700 CUSHION RUBBER 1 1 2 200 3700 OVEN 1 NOTE 4 A203P3700BP_ ANTENNA 1 A30073700BP_ LOWER HINGE 1 3020 1480 DOOR HOOK A AES 3097 1480 SPRING 1 A3136 1480 HOOK SPACER 1 3137 1480 HOOK SPACER 1 138 1480 HOOK SPACER 1 186370089 DOOR PANEL 07 1863700 DOOR PANEL 1 A400A3700BP_ FAN MOTOR 1 A4008 1480_ 1 A402537008P AIR GUIDE A 1 41445540 ORIFICE 1 AG00B3700HN H V TRANSFORMER T AL7KVA 6011 1540 TEMP SENSOR 1 304080 INCANDESCENT LAMP 1 1 A603
12. Measurement of microwave output The output power of magnetron be determined by performing IEC standard test procedures However due to the complexity of IEG test procedures itis recommended to test the magnetron using the simple method outlined below Necessary Equipmet w ilerbeaker Glass thermometer Wrist watch or stopwatch NOTE Check the line voltage under load Low voltage will lower the magnetron output Take the temperature readings and heating time as accurate as possible the beaker with exactly one liter of tap water Stir the water using the thermometer and record tha beaker s temperature recorded as T1 8 Place the beaker on the center of glass cook plate 8 in for High power and heat it for exactly one minute C Stir he water again and read the temperature of the beaker recordad as T2 0 The normal temperature rise 2 1 at High power position for each model own in table SWITCH SHOULD lt 1MM ACTUATOR LEVER DOOR SCREW PRIMARY LATCH SWITCH DOOR HOOK ASSY SHORT SWITCH SECONDARY LATCH SWITCH snew 06 095 Please confirm that the gap between the switch housing and switch actuator levers is no more than 1 0 mm when the door is closed ABLE 1 1min test Min 86 C Min 82 C 1000W IEC 705 950W IEC 705 TROUBLESHOOTING GUIDE CAUTION Check gr
13. and flat cable of key board screws holding DPC Remove metal tim from escutcheon 8 Poal off the tab of membrane kay board from escutcheon base Pee off the display fitr from escutcheon baso 1 Push the upper part of key board display window porton trom back of escutcheon base and peel off escutcheon sheet and membr NOTE 1 The membra base with double Therefore applying hot air such recommended for smoother remova 2 When installing new membrane key board make sure that the surface of escutcheon base is cleaned sufficiently so that any problems shorted contacts or uneven surface can be avoided 3 Alignment position of membrane key board is as follows see figure Membrane key board Right and upper edges Escutcheon sheet Right and lower edges key board completaly from escutcheon base board is attached to the escutcheon d adhesive tape using a hair dryer is 3 Low voltage transformer and or power relays RY1 RY2 RY4 NOTE Be sure to ground any static electric charge built up on your body before handling the DPC A Using solder wick or a desoldering tool and 30W soldering iron careful remove solder from the terminal pins of tho low voltage Transformer andior power relays NOTE Do not use a soldering iron or desoldering tool of more than 30 watts on DPC contacts With the terminal pins clean
14. does not accept key input Program 1 tis not 72 Open or loose connection of membrane key pad to DPC Fiat cable Shorted or open _ 4 Defective DPC 3 Oven lamp and fan motor turn on when 1 Misalignment or loose wiring of Adjust door and latch switches oven is plugged in with door closed 4 Timer starts count down but no microwave oscillation 2 Defective primary latch switch 3 Open or loose wiring of power relay Yn 4 Defective power relay RY1 5 Defeciive DPC 6 Open or loose connection of high voltage circuit especially magnetron flament circuit NOTE Large contact resistance will bring lower magnetron flament voltage E and causing magnetron to lower output and or intermittent Hv Transformer according to component test procedure and replace if itis defective TROUBLE 2 Fuse is blown SYMPTOM CAUSE CORRECTIONS 1 fuse is blown 1 Shorted lead wire 2 Defective short switch a 4 Shoried H V Capacitor 5 Shorted RV D 6 Defective magnetron 8 Shorted Protector diode Crack of ach switches and door NOTE Be sure to replace protector diode toget In this case only 02 of protector diode ther with thosa Components may be shorted due to faulty Component Therefore if protector diode is not replaced together high voltage t
15. serious injury death WARNING This product should be serviced only by trained qualified personnel This service manual covers products for following markets When troubleshooting or replacing parts please refer to the country identifications shown below for your applicable product specification For Singapore VPE MNQ For Malaysia For Hong Kong JPG For South Africa For Australia For New Zealand CONTENTS CONTROL PANEL OPERATING PROCEDURE SCHEMATIC DIAGRAM sn DESCRIPTION OF OPERATING SEQUENCE CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE COMPONENT TEST PROCEDURE MEASUREMENTS AND ADJUSTMENTS 2 TROUBLESHOOTING GUIDE EXPLODED VIEW AND PARTS LIST SCHEMATIC DIAGRAM amp PARTS LIST OF DIGITAL PROGRAMMER CIRCUIT OUTLINE DIAGRAM NE 1037 4 Digital Display Window see below 2 Power Level Pad o 8 Program Pad 4 Double Quantity x2 Pad 5 Start Pad 6 Stop Reset Pad 2 7 Memory Pads 8 Control Panel 9 Door Safety Lock System 3 10 Oven Window 7 11 Oven Lamp 15 ro 11 5 srant 8 Program Change Indicator B Double Quantity x2 Heating Indicator C Memory Pad Number and Heating Time Display min sec D Stage Heating Indicator
16. 74760GP_ CAPACITOR BRACKET 1 A606V3700BP_ PROTECTOR DIODE EI 1 Ret No Part No Part Description Res Remarks 38 2 244 6 6 MAGNETRON T 39 6090408085 3 40 A 6142 1450 MICROSWITCH T 166 3 26 PRIMARY LATCH SWITCH 41 A61425180AP MICROSWITCH 1 302 2 SECONDARY LATCH SWITCH 42 A61443660AP ANTENNA MOTOR 1 340 43 A61455840GP THERMAL CUTOUT T 44 61524650 1 45 ANE6161 3X0 MICRO SWITCH 1 V 16G 1C25 SHORT SWITCH 46 62024000 DIODE ST 1 47 A A628042108P FUSE 1 m5 48 A A65953700BP FUSEB 1 7 49 AGGZY37008P NOISE FILTER 0 1 50 900 37000 CORD WIPLUG 1 1037 230 240 71 50 A900C3700MN AC CORD W PLUG 1 NE 1037 MNOYNO HNE 220 2007 50 A900C3700TN AC CORD W PLUG 1 1037 TNE 220V 50 AX A900C3700VP AC CORD W OUT PLUG 1 1037 VPE 220V 51 A90353700BP_ CORD BRACKET 1 527 XTC4 108C SCREW A CABINET BODY 53 410 0 SCREW 4 0110 FOR MAGNETRON 54 XYCA4 BE12 SCREW 1 4X12 FOR EARTH 55 SCREW 4X8 FOR HINGE 56 ANE00057JOXN EARTH LABEL 1 1037 TNE NOTE 4 Please order name plate together SON DOOR ASSEMBLY
17. 9232425 10 2 5 CERAMIC CAPACITOR 4 c22 ECEAIHKA2R2B ELECTROLYTIC CAPACITOR AL 1 22 50 29 30 ECBTIHIOIKBS CERAMIC CAPACITOR 2 O 001MF SOV 33 435 36 ECBTIHGBIKBS CERAMIC CAPACITOR 4 one AEEMMDO4907W CONNECTOR AEEMTIFDZBTM CONNECTOR 1 AEEMMFOODO4W CONNECTOR 1 AEFFTARISGWT CERAMIC RESONATOR 1 011 12 AEDNERAI502 DIODE SI 2 108 015467 MA196 TAS DIODE SI 12 ota 18 19 20 22 23242526 27 DISP 1008 FLUORESCENT TUBE 50940509 1 NE 1037 940507 1 NE 1037 JPGMNQ OPO YNO 102 AEIC102977AN 10 1 SN102977AN AN6752 1 5 24 0 2502012 TRANSISTOR SI2W 1 2 2 2 TRANSISTOR SI 400MW 1 a00MHz UN4111 TA TRANSISTOR SI 300MW 2 049 UNA211 TA TRANSISTOR S1 300MW 2 0567 250131805 TRANSISTOR SI 400MW RIV 237 ERDS2TJ221T CARBON FILM RESISTOR 2200 AW R13 14 17 18 ERDSZT IST CARBON FILM RESISTOR 4 rk aw ene RI52124 ERDS2T 103T CARBON FILM RESISTOR 7 10K0 114W 5 26 29 3241 RIG ERDS2TJ681T CARBON FILM RESISTOR 1 6800 1 aw 5 RI9 2730 ERDS2TJ222T CARBON FILM RESISTOR 3 22K0 1 4W 5 R20 42 43 EROS2TJ102T CARBON FILM RESISTOR 5 She R22 ERDS2TJ333T CARBON F
18. FORMER S 370 I q Ref Part No Part Name amp Description Set Remarks Wi AISORSTOBE LEAD WIRE HARNESS We AGGESSTOOBP TEAD WIRE 1 Wa 2025537008 LEAD WIRE 1 wa 509665200 FERRITE 1 sa Ret Part No Part Name amp Descri roe Remarks REF NO 49 NOISE FILTER U Cr ECQUZATOAMN POLYESTER CAPACITOR T 2 3 ECKMNA472AE CERAMIC CAPACITOR 2 00047 2507 CNT AEEMMDO0703W CONNECTOR 1 F1 623160108 FUSE HOLDER 2 F2 A62316000GP_ FUSE HOLDER 2 Li 21 1810 FILTER COIL 1 Ri 02 12402 RESISTOR GA ERD25FJ5645 CARBON FILM RESISTOR EEA ZNR1 20100 621 VARISTOR 1 a 758231 ERZC10DK112A_ VARISTOR 2 a DIGITAL PROGRAMMER CIRCUIT SCHEMATIC DIAGRAM ConTaoL 777 T Omum iy KA DIGITAL PROGRAMMER CIRCUIT PARTS LIST Ref No PartNo Description P Remarks 52 REFBZGEPZOTL BUZZER 1 amp 0RRZ 0 ELECTROLYTIC CAPACITORAL 1 ECAIHMIOIB ELECTROLYTIC CAPACITOR AL 1 C14 7 18 AECFS0F1042 CERAMIC CAPACITOR 8 OMFISOV 21262731 32 Cis 1008 ELECTROLYTIC CAPACITOR AL 1 01
19. ILM RESISTOR 1 G9KQ AN 5 82334 ERDS2TJ4T CARBON FILM RESISTOR 2 R2528 ERDS2TJ330T CARBON FILM RESISTOR 2 5 ERDS2TJ105T CARBON FILM RESISTOR R33 ERDS2TJ472T CARBON FILM RESISTOR 1 ATKO UAW SS ERDS2TJ470T CARBON FILM RESISTOR 2 5 Rao ERDS2TJ122T CARBON FILM RESISTOR 1 t2Kovaw ene POWER RELAY 3 G5 TP M ERIB RY3 M AEBGGSNIATB POWER RELAY 1 GSN TAtBV SPACER 2 SPACER CUSHION 1 ETPATKONGIWN LV TRANSFORMER 1 ETPATKDNGIWN 2 2 1 COMPOUND RESISTOR 2 10004 201 2586 5211 DIODE SI 1 056 62 202 227 83 DIODE SI 1 RD27ES3 203 2 1 DIODE SI 1 204 DIODESI 1
20. SISTANCE VALUE 30K 120K at 10 C 30 C 50 86 efi oHm SCALE NOTE OHMMETER SHOULD HAVE A MINIMUM 6 VOLT BATTERY FORWARD REVERSE SEVERAL HaNDRED Kal E 04 0334 5 scave en FORWARD REVERSE en 04039 MEASUREMENTS AND ADJUSTMENTS 1 Adjustment of Primary latch switch Secondary latch switch and short switch A When mounting Primary latch switch Secondary latch switch and short switch to door hock assembly mount the Primary latch the short switch to the door switch the Secondary latch switci hook assembly as shown in table NOTE No specific adjustment during installation of Primary latch switch Secondary latch switch and short switch to the door hook is necessary When mounting the door hook assembly to the oven assembly adjust the door hook assembly by moving itin the directon of arrow in table so that the oven door will not have any play in it Check for play in tha door by pulling the door assembly Make sure that the latch keys move smoothly after adjustment is completed Completely tighten tne screws holding the door hook assembly to the oven assembly C Reconnect short switch and check the continuity of the monitor circuit and all latch switches again by following the components tast procedures 2
21. T BECOME EXPOSED TO RADIATION FROM THE MICROWAVE GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY 3 When parts must be replaced remove the power plug from the outlet 4 When the 10 250V fuse is blown due to the operation of short switch WARNING When the 10A 250V fuse is blown due to the operation of short switch you must replace Primary latch switch and short switch Also replace power relay 1 when the continuity check reads shorted contacts 1 2 This is mandatory Refer to Adjustments and Measurement for these switches B When replacing the fuse confirm that it has the appropriate rating for these models C When replacing faulty switches be sure mounting tabs ara not bent broken or otherwise deficient in their ability to hold the switches Avoid inserting nails wire etc through any holes in the unit during operation Never insert a wire any other metal object through the lamp holes on the cavity any other holes or gaps because such objects may work as an antenna and cause microwave leakage IMPORTANT NOTICE 1 The following components have potentials above 250V while the appliance is operated Magnetron High voltage transformer High voltage diode High voltage capacitor Protector diode Pay special attention on these portions 2 When the appliance is operated with the door hinge or magnetron fixed incorrectly the microwave leakag
22. ad aga show anying and remain bank NE 1037 SCHEMATIC DIAGRAM DANGER HIGH VOLTAGE AREA MAGNETRON NOTE Door is dosed Unt not operate CHASSIS GROUND Fuse VARISTOR NOSE ALTER SW PRIMARY INTER LOCK SWITCH UPPER i i 1 SECONDARY INTER 1 LOCK SWITCH LOWER 1 suis SWITCH Lowen THERMAL CUT OUT 1 RELAY an 1 RELAY RELAY STER woron a 7 LOW VOLTAGE TRANSFORMER HIGH VOLTAGE CAPACITOR THERMISTOR DIODE DIGITAL PROGRAMMER CIRCUIT 419942 WH PROTECTOR DIODE WIRING DIAGRAM NOTE When replacing check tne lead wire colour as shown Colours shown by indicate colours ead wire connector housing W MAGNETRON Tocess u BOUE PRIMARY LATCH SWITCH 8 bul HIGH VOLTAGE m 9 PROTECTOR 00 DIODE SECONDARY LATCH SWITCH SW2 8T D GH VOLTAGE ECT w B TRANSFORMER Qa 2 Re Sle 420 S Lern 2 ee EE SHORT SWITCH SW BACT EPG
23. e can reach more than 5mWicmr After repair or exchange it is very important to check if magnetron and the door hinge is correctly fixed DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 1 Magnetron A Discharge the high voltage capacitor Remove 2 screws holding magnetron thermal cutout C Remove 1 screw holding air guide A 0 Disconnect 2 high voltage lead wires from magnetron filament terminals E Remove 4 screws holding the magnetron NOTE After replacement of the magnetron tighten mounting screws properly making sure there is no gap between the waveguide and the magnetron to prevent microwave leakage CAUTION When replacing the magnetron be sure the antenna gasket is in place CAUTION When connecting 2 filament lead wires to the magnetron terminals be sure to connect the lead wires in the correct position The lead wire of high voltage transformer should be connected to terminal and the lead wire from high voltage capacitor should be connected to terminal 2 Digital Programmer Circuit DPC and membrane key board NOTE Be sure to ground any static electric charge built up on your body before handling the DPC A Disconnect connectors from D P C B Remove 2 screws holding escutcheon base and slide tho iculchoon base upward slightly C Release fiat cable connactor s lock of by pushing both levers to insida and pull them upward
24. ed and seperated trom DPC contacts remove the defective transformer power relays and install new transformer power relays making sure terminal pins are inserted completely Resolder all terminal contacts carefully DANGER HIGH VOLTAGE AIR GUIDE A THERMAL MAGNETRON CUTOUT 08 082 4 Fan motor Disconnect 2 load wires from fan motor terminals B Disconnect lead wires from noise fiter PCB terminals C Disconnect 4 high voltage load wires from high voltage capacitor terminals 0 Ramova 5 screws holding fan motor and orifice assy and detach the orifice assy with fan motor from oven assy Remove fan blade from the fan motor shaft by pulling it straight F Separate the fan motor from the orifice assy by freeing 2 catch hooks on the orifice assy 5 Temp sensor thermal protector Cut a lead wire at the top of sensor terminals 8 Remove 1 screw holding tha temp sensor and replace with new one C Solder the lead wires securely to the sensor terminals 6 Door assembly A Open the door and remove door from door E by carefully puling outward stating from upper right hand comer Remove door key and door key spring Remove 2 screws holding side frame of door A D Seperate the door A from the door E by freeing catch
25. erve the resistance reading Meter with 6V 9V higher voltage batteries should be used to chack the front to back resistance of the diode otherwise an infinite resistance may be readin both directions normal diode s resistance will be infinite one direction and Several hundred in the other direction 5 Membrane key board Membrane switch assembly Check continuity between switch terminals by tapping an appropriate pad on the key board The contacts assignment ofthe respective pads on the key board is as shown in diga programmer circi 6 Protector diode Isolate the protector diode assembly trom the circuit by disconnecting its leads With the ohmmeter set on the highest resistance scale measure the resistance across the protector diode terminals Reverse the meter leads and again observe the resistance reading normal protector diode s resistance wil be infinite in both directions itis faulty if it shows continuity in one or both directions 7 Temp sensor Thermal protector sensor is mounted on exhaust guide Its purpose is to automaticaly shut off the oven in case the cavity overheats for any The therr al protector wil operate at 257 F 125 C Tha device is connected to the DPC on touch control models When the thermal protector exceeds its temperature wil turn of the power to oven cavity and display wl go to reset mode The cooking program can be reset after cool down THERMISTOR RE
26. hooks on the door A using a flat screwdriver After replacement of the defective component parts of the door reassemble it and follow the instructions below for proper NOISE ALTER ORIFICE ASSY REMOVE 5 SCREWS FAN BLADE HIGH VOLTAGE MOTOR CAPACITOR 277 OVEN ASSEMBLY en installation and adjustment so as to prevent an excessive microwave leakage 1 When mounting the door to the oven be sure to adjust the door parallel to the bottom line of the oven face plate by moving the upper hinge and lower hinge in the direction necessary for proper alignment 2 Adjust so thatthe door has no play between the inner door surface and oven front surface Ifthe door assembly is mounted property microwave power may leak from the clearance between tha door and oven 8 Perform the microwave leakage test DOOR 01 026 2415 7 Stirrer motor A Remove tha motor cover by breaking at the 8 spots indicated by arrows with a cutter or the lke See Figure NOTE After breaking off the motor cover make sure that cutoff portions are properly trimmed off or bend to inside so that sharp edge will expose to outside 8 Disconnect 2 lead wires connected to the stirrer motor C Remove the stirrer motor by removing 2 screws NOTE To reinstall the motor cover use 4X6 screw 8 Floor shelf and or moving antenna A Inserta philips t
27. ounding before checking for trouble Be careful of the high voltage circuit Discharge high voltage capacitor When checking the continuity of the switches or the high voltage transformer disconnect one lead wire from these paris and then check continuity with the AC plug removed do otherwise may result a false reading or damage to your meter When disconnecting a plastic connector from a terminal you must hold the plastic connector instead of the lead wire and then disconnect it otherwise lead wire may be open or the connector cannot by removed 5 Do not touch any parts of the circuitry on the digital programmer circuit since static electric discharge may damage this control panel Always touch yourself to ground while working on this panel to discharge any static charge in your body 6 A 220 230 240V is present at the shaded area the digital programmer circuit Terminals of power relay s and primary circuit of low voltage transformer When troubleshooting be cautious of possible electrical shock hazard First of all operate the microwave oven following the correct operating procedures in order to find tha exact cause of any trouble TROUBLE 1 Oven does not start cooking SYMPTOM CAUSE CORRECTIONS 1 Oven is dead Fuse is OK 72 Open thermal cutout Magnetron No display and no operation at 8 Open iow voltage transformer 4 Defective DPC 2 Oven
28. ransformer willbe damaged over heated TROUBLE 3 Other troubles SYMPTOM CAUSE CORRECTIONS 11 Mirowave outputs 1 Decrease in power source voltage electrician Oven takes longer time to cook food 2 Open or loose wiring of magnetron flament circuit intermittent oscilaton 3 Aging change of magnetron 12 Fan motor and oven lamp tum on when 1 Shorted primary latch switch door is opened 31 Oven does not operata and retur to T Opan or loose wiring of temp si heck screws on escutcheon base plugged in mode 73 Detectve OC Reter to DPC troubleshooting 21 Loud buzzing noise can be heard T Loose fan and fan molor 2 Loose screws on Transformer 5 Oven stops operation during cooking secondary latch switch 3 Operation of thermal cutout Magnetron amp Stirrar motor doos not rotate T Open or loose wiring of molor 2 Detective stirrer motor 7 appears in display window 1 Open temp sensor 2 Defective D C 8 appears in display window 1 Shor temp sensor 2 Defecive D P S appears in display window and oven 1 Foods overcooked and oven exhaust After cool down approx 10 minutes beeps temperatur too high over 130 C Unplug oven to reset display 10 F44 appears in display window 1 Malfunctioning keypad stays on for more than 2 minutes 214 Trouble related
29. to Digital Programmer Circuit SYMPTOM CHECK RESULT CAUSE CORRECTIONS No display when oven ls frst Printed use pattem of DPG STEP2 Plugged in Open NOTE Shorted circuit of ZNA LV Oven Lamp Replace DPC 2 Low vottage transformer Abnomnal Ov wr secondary voltage er 3 IC 1 pin 1 voltage Abnormal 201 01 miner of ace zr 4 1 1 27 voltage Abnormal 1 2 Mpinoricz Normal 5v IC 1 DISPLAY No key input 1 Membrane switch continuity Abnormal Membrane switch 13 sound 1 pin 23 voltage Abnormal 13 Normal 82 03 04 09 Power relay A RY 3 does not 12 1 pin 12 voltage while operation Abnormal 14 bam he 5 su nortumon RY 2 tums 1 2 No microwave oscilaton at any 1 10 and pin 20 votages Abnormal power soting while operation at high power See 10 59 20 59 Abnormal a 10 8 Dark or unclear display 1 Replace display and check mm 7 DISPLAY _ i operation Abnormal Missing of Replace 16 1 and check operation 13 unnecessary segment Abnormal DISPLAY HOW CHECK THE SEMICONDUCTORS USING OHM METER
30. ype screwdriver or equivalent approx 27 5 em in shaft length in the hole in the et side oven wall as shown in Figure B Careful lit up the fior shelf by prying up with the screwdriver the floor shel is ited up over me level of oven front opening Remove the floor shelf by lifting it out through the oven front To repisoe moving antenna 10 Remove the moving antenna by simply ting it up the sire molor shat NOTE When replacing the moving antenna make sure the plastic stirrer spacers are correctly in place They are necessary to stabilize the antenna by gliding around the oven bottom as the antenna turns MOTOR COVER screw 08 08 HOLE FOR FLOOR SHELF REMOVAL SCREWDRIVER ovat COMPONENT TEST PROCEDURE CAUTION 1 High voltage is present at the high voltage terminal of the high voltage transformer during any cook cycle 2 Itis neither necessary nor advisable to attempt measurement of the high voltage 3 Before touching any oven components or wiring always unplug the oven from its power source and discharge the high voltage capacitor 1 High voltage transformer A Remove connections tom the transformer terminals and check PRIMARY WINDING TERMINALS FILAMENT wwoNG N 100 TERMNALS scaLe SECONDARY WINDING TERMINALS 609 1000
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