SERVICE MANUAL Microwave Oven EM
Contents
1. CONTROL CIRCUIT BOARD ga OF 09 00 5600 EEE so 8 da a loves GOL y SUS L A C132 y Jo BRAR gs L d 8 E O RISS S E o 3 30030 2 SX BERGER g CH o 7 uge ep lt Dist _ S107 _ HB jo DI am O RISO Qu6 2 D Lo Cp ngg 125 2 42 ona 7 40 mes De Op m dig OO R140 O A SD awet O aoe R164 OD wor 2 8 J126 E SERA LO CH DI 5 A se c17 es ige CH 510 Jia 8 L ZDIC IT nm D122 5 S a JB3 en A Seet h IH S 0122 O a Az Dis 0123 pi geil A Es ur a R139 472194 ao Ee 113 lt 327 2 C103 A t g Rios OS am Oper ao 3008 Rin o Bu H JB3 D110 DIO8 z RL2 RLI e LT oi 2 550 Brie 2 Figure 12 205 DG SANYO SANYO Electric Co Ltd OSAKA Japan DT2. R111 15K C117 1000P 50V R106 10K 5V R113 R107 10K 10K 8 L 5V C119 1000P 50V R109 10K A C130 0 1 u 25V 3 32 V 26 C107 l R602 te ipa 2 R601 0103 03402 10K 38 127 1 8K 2 R124 D113 3 9K ONE A 0104 A R125 1 8K SCH R129 100K 0105 03402 2 16V H R130 100K R188 IK a 30 B 31 5y RST ANHZ P16 PD P15 PD P14 PD P13 PD P12 PD P11 PD P10 PD PO7 PD PO6 PD PO5 PD P04 PD PO3 PD PO2 PD PO1 PD POO PD VEE P44 P43 P67 ANT P66 AN6 lt o P65 AN5 N oo P64 ANA P61 ANI sei O N2 _ vec VREF AVSS VSS P40 INTO P47 P22 PD P21 PD P20 PD P63 AN3 P45 CNTR1 P42 XIN XOUT P71 S102 Door XA 3 2 P Sensing P70 Si 20 R187 10K O P46 Sen 2 7K 0 01 u 50V 5 25 R150 D121 P41 O 10K R152 1K S302 XA 2P D122 MPGO6G CB101 RB101 S 1 ch SW305 1000Px6 op 100Kx6 LISP 5107 13P l eer EE DO O s w303 SW302 d SW301 Y x Inn E OM 180W 360W ox m y Ei o 5 A O09 GG 0 QQG OO OQ OEE RL4 m O x CB102 1000P x 5 Q110 A1348 D 16V RL6 sd 10K 0108 3402 Wr 10K api R138 R139 Le SES P17 PD 2108 x2 D115 R136 R137 O 35V Q109 A1348 2109 x2 RL1 Y me Wy 5 RD13ESB2 35V 0106 C123 A1503 0 01 u 50V a D114 KE R131 CH 1K 10 re BR RES C110 1u 77 hr 50V 59 AZ Nw Q 5V IA
3. SWITCHES on page 6 5 Make sure the interlock monitor switch opens be forethe primary interlock switch closes when the door is closed very slowly according to CHECK OUT PROCEDURE FOR SWITCHES on page 7 Test Procedures and Troubleshooting 4 10 Disassembly Instructions Exploded View and Parts List eee eee 15 22 Control Circuit le EE 23 Overall Circuit Diagram nennen 24 25 6 Make sure the microwave energy leakage should be no greater than 5 mW cm to allow to measurement uncertainty when measured with a detector All service adjustments must be made for minimum microwave energy leakage readings NOTE If the interlock monitor circuit operates and at the same time the fuse blows with the door opened be sure to replace the control circuit board because relay 3 and 4 on the control cir cuit board the door sensing switch and the elec tric circuit related on the door sensing switch which act as Secondary Interlock switch Interlock monitor switch Latch Lever Primary Interlock switch Latch Lever Door sensing switch Screws Figure 1 2 SPECIFICATIONS Microwave output 1 900W to 190W Frequency annen 2 450MHz Power Supply ee 230V 50Hz Rated current 12 8Amp Safety Device Thermal limitter Magnetron 150 C Open Thermistor Magnetron 165 C Open Thermistor Duct 12
4. UNE DE CES PIECES N UTILISER QUE DES PIECES NE DU FABRICANT Caution The voltage between filament leads of magnetron is about 3 3VA C but the filament carries 4KV D C high voltage with respect to grand Never touch these lead with bare hand during operation sga 6 TEST PROCEDURES AND TROUBLESHOOTING Primar GAUTION an e ra nd DISCONNECT THE POWER SUPPLY CORD FROM THE NA g WAL OUTLET WHENEVER REMOVING THE CABINET 7 FROMTHE UNIT N PROCEED WITH TESTS ONLY AFTER DISCHARGING THEHIGH VOLTAGE CAPACITOR AND REMOVING THE LEAD WIRES ON THE PRIMARY WINDING OF THE HIGH e lamen VOLTAGE TRANSFOREMER SEE FIGURE 3 Windings A TEST PROCEDURES COMPONENT CHECKOUT PROCEDURE RESULT 1 Check for resistance Across the filament ter Normal reading minal of the magnetron with an ohm meter on Less than 1 ohm Rx1 scale MAGNETRON 2 Check for resistance Between each filament Normal reading terminal of the magnetron and the chassis Infinite ohms ground with an ohm meter on highest scale 1 Measure the resistance Normal reading With an ohm meter on R x1 scale a Primary winding Approximately 1 0 ohms b Filament winding Less than 1 ohm c Secondary winding Approximately 60 ohms 2 Measure the resistance Normal reading with an ohm meter on highest scale a Primary winding to ground Infinite ohms b Filament winding to ground Infinite ohms HIGH VOLTAGE TRANSFORMER Note Remove varnish
5. of measured point COMPONENT CHECKOUT PROCEDURE RESULT HIGH VOLTAGE an ohm meter on highest scale CAPACITOR Including bleeder resistor HIGH VOLTAGE an ohm meter on highest scale DIODE Measure the resistance Across two terminals with an ohm meter on highest scale Measure the resistance Across two terminals with Normal reading Measure the resistance Across two terminals with Normal reading Momentarily indicates several ohms and gradually to 10 meg ohms Abnormal reading Indicates continuity or 10 meg ohms from the beginning Indicate about the middle position in one direct forward and infinite ohms in the reverse direction using meter with a 9 volt battery NOTE Some digital meter may show over even in a forward direction because low mea suring voltage of meter does not allow the meter to pass through the high volt age diode Abnormal reading Indicates continuity or infinite ohms in both directions Normal reading Indicate infinite ohms in both directions Abnormal reading Indicates continuity in both directions or continuity in one direction and infinite ohms in reversed direction WARNING When removing the cabinet you must disconnect the power supply cord from the wall outlet for your safety Only the checkout procedure below needs the power supply on TAKE GREAT CARE to avoid possible shock For your safety proceed with the test only after re moving the wire leads f
6. page 7 WHEN REPLACING ANY DOOR MICROSWITCH REPLACE WITH THE SAME TYPE SWITCH SPECI FIED ON THE PARTS LIST C REMOVING FUSE Remove the 10A fuse with screwdriver NOTES When replacing the 10A fuse be sure to use an exact repair part If the 10A fuse blows immediately check the primary interlock switch the relay 3 and 4 on the control cir cuit board and the interlock monitor switch according to CHECKOUT PROCEDURE FOR SWITCHES on page 8 and make sure to check the microwave en ergy leakage according to 1 ADJUSTMENT PROCE DURE FOR SWITCHES on page 1 when the primary interlock switch the relay 3 and 4 or the interlock moni tor switch is adjusted or replaced a 47 If the primary interlock switch the relay 3 and 4 or the the interlock monitor switch operate properly deter mine which of the followings is defective control cir cuit board blower motor gear motor high voltage trans former high voltage capacitor high voltage diode or magnetron If the high voltage diode is defective replace not only the high voltage diode but also the fuse diode D REMOVING DISPLAY CIRCUIT BOARD 1 Disconnect all lead wires of the Control panel from the Control PCB and Power PCB 2 Remove 4 screws securing the Control panel Ass y to the oven cavity 3 Push up and pull out the Control panel Ass y 4 Remove 4 screws securing the Display PCB 5 Take out the Display PCB and push up t
7. 0 C Open Fuse Cartridge Type 250V 10Ax2 Micro switch Relay Primary interlock Switch Interlock monitor Switch Door sensing Switch and Relay RL 3 and 4 Max input time Electronic Digital up to Manual 10min max 30min low power Overall Dimensions 422 W x540 D x335 H mm Oven cavity size 330 W x330 D x230 H mm Effective Capacity of Oven Cavity 19 1 liters Net weight 32Kg 3 POWER OUTPUT MEASUREMENT 1 Prepare 1000 5g tap water 2 Adjust water temperature to 10 2 C 3 Pour water into a container made of borosilicate Glass 190mm outer diameter cylinder maximum 3mm thickness Note Use the container kept on the room tem perature 4 place the container on the center of oven cavity 5 Set the heating time for 26 seconds and rating full power and then start oven 6 Take the container out immediately when heat ing time is up 7 Stir water for making even water temperature in the container 8 Measure water temperature Water temperature rise shall be 8 to 12 C 4 PRECATIONS AND REPAIR SERVICE TIPS PRELIMINARY A SINCE NEALY 4 000 VOLTS EXISTS IN SOME CIRCUITS OF THIS MICROWAVE OVEN RE PAIRS SHOULD BE CARRIED OUT WITH GREAT CARE B TO AVOID POSSIBLE EXPOSURE TO MICRO WAVE ENERGY LEAKAGE THE FOLLOWING PRECATIONS MUST BE TAKEN BEFORE SER VICING 1 Before the power is applied a Open
8. 4 617 055 9584 617 123 9942 617 196 9184 617 078 3132 617 179 6087 617 202 7845 617 120 4230 617 120 4148 617 120 3387 617 238 3026 617 077 6356 617 237 1726 617 267 4193 402 061 1505 617 131 3789 617 195 1295 617 214 4801 617 125 3832 617 266 5184 617 208 1403 617 192 2110 617 224 4006 617 202 0150 617 214 1619 617 130 4879 617 209 9422 617 120 3325 617 212 8535 617 121 9265 617 149 3054 617 120 3349 617 120 3332 617 207 6836 423 018 7609 DESCRIPTION CABINET FRAME PLATE ASS Y INSU SHEET CORD COMP CORD BUSH FRAME B C T INSU SHEET SHELF ASS Y STIRRER GUIDE LAMP OPENING COVER LAMP LAMP SOCKET CAVITY COVER THERMISTOR ASS Y CERAMIC RES 25J 20W RELAY SPECIAL WASHER FRAME REAR PLATE ASS Y BOTTOM BRACKET P C B COMP P C B COMP TERMINAL PLATE GEAR MOTOR UPPER P C B COMP P C B COMP HARNESS GEAR MOTOR LOWER ANTENNA SHAFT ANTENNA BEARING CLIP ANTENNA LOWER SPECIAL NUT ANTENNA UPPER CLIP FUSE 250V 10A 2475 SUS430 T0 4 UPPER LOWER LGCC T1 2 T0 4 P P POLYSTER TU METRO 240V 25W E 14 OKUNO PAO 2A250VT1 PEIGE MTST ERF 20HMJ250 LY2F T2 1115 BRASS T1 0 NI PLATIN LGD T1 2 60160 CONTROL NOISE FILTER FUSE CB 70921 MT 8 RELAY POWER M2CJ29AA49 H UL AL PFA AL AL MPS 04 0 NF M ES US Rw E ie es ee E E ee Main body Parts 2 Parts marked with this sign are supplied with high voltage exceeding 250
9. LLECTION key 1800W for 4 seconds continuously Accumulative cooking time will be cleared J CAUTION FOR CUSTOMER ON OPENING AND CLOSING DOOR When the Microwave oven is in operation should the customer open the door slightly and close the breaker of the house will occasionally be cut off It is necessary to explain to the customer not to exercise such matter When the Door is opened slightly between 2 or 3 mm distance primary interlock switch turn OFF and operation stops However door sensing switch will remain ON and if door is closed primary interlock switch activates and operation resumes immediately At such time microwave oven will start any time Therefore a big In rush currnet flows and thus Breaker will be cut off K RELEASING TYPE CONNECTOR This oven is provied with locked type connector When you remove a connector pull the connector while releasing the lock by pressing iAi point shown below Do not pull the wire of the connector Connector S1 S2 5102 S104 S105 Figure 13 Figure 13 Figure 14 E Pull connector case Never pull the wire Figure 15 The number of door operations 100 times Accumulative cooking time Operation Display window Turn the TIMER KNOB to left until display shows 0 The total cooking time appears in the display for 5 seconds e Touch START key first and also touch POWER SELECTION key until display changes e 0 appe
10. R 0 1MFD V 5220D 502 V 5930D 013 V 5330DK SUS304 WPB D0 65 SUS304 WPB D0 65 SUS304 WPB D0 7 6 6NYLON G 15 N5T C 1850 TEFRON SPG T1 0XD5XD13 SCH E eM E E E E we RRS Re Door Parts EM C1900MUK KEY No SERVICE PARTS DESCRIPTION 1 COND 01 GO K 12 13 14 15 16 17 18 19 617 201 9697 617 201 9680 617 120 3110 617 120 3127 617 226 5605 617 257 2970 617 121 5489 617 239 6354 617 178 0840 617 120 3028 617 102 7495 617 080 3847 617 068 3623 617 178 0833 617 068 1087 617 068 3579 617 140 5392 617 257 3045 DOOR HANDLE DOOR BASE ORNAMENT PLATE ORNAMENT PLATE DOOR COVER DOOR PANEL PACKING DOOR ASS Y CHOKE DIELECTRIC HINGE SPECIAL SCREW SPECIAL SCREW DOOR ARM LATCH SUP DOOR LATCH ARM PIN SPRING DOOR COMP 21 AL PP UPPER LOWER ABS CE10 T90 GLASS T3 2 FR PET SPHC T3 CAP TIGHT SELLATIONS SUS 304 D6 SECC J T1 0 DURACON GF25 S30C ZK SWP B D1 1 AAA Control panel Parts EM C1900MUK KEY No SERVICE PARTS 1 COND O E O N 9 10 11 12 13 617 226 5214 617 206 0873 617 193 6094 617 130 9348 617 073 7616 617 073 9672 617 266 5375 617 192 5920 617 206 9203 617 193 6315 617 213 8596 617 208 3377 617 213 8619 ACCESARIES KEY No SERVICE PARTS 617 197 4416 2 617 266 5320 41 DESCRIPTION CONTROL PLATE CONTROL PLATE CONTROL BASE ORNAMENT PLATE CAVITY GASKET PACKING COVER P C B COMP P C B COMP SWITCH ASS Y TIMER KNOB BODY PART
11. S BASE CONTROL COVER SPACER DESCRIPTION PARTS BAG COMP INST MANUAL Accesaries Item No 1 No 2 are not illustrated 99 Parts marked with this sign have special characteristics important for microwave leakage When replacing any of these parts use only manufacturers specified parts ACRIL 2 0 ABS SECC 10 6 D BOARD START ABS LGCC 11 0 T0 1 CH Q TY 9 OVERALL CIRCUIT DIAGRAM AC230V NOISE FILTER PRINTED CIRCUIT BOARD THERMAL INTERLOCK PROTECTOR SW 6 S1 XA 5 3 P N wm 3 Ho d elp e e INTERLOCK MAGNETRON LOWER VSTI PT1 H V TRANSFORMER THERMAL PROTECTOR MAGNETRON UPPER VST2 ZD12 R19 3 3K RD16ESB3X2 ZD13 V 2700 330 Q R15 2200 ZD14 RD3 9ESB1 R16 2200 PCM 1500 DT1 wesch at Just ee Jo SI S 3 C51 1000 u 16V D51 MPGO6G S i LU CPR2411GM d sch sech o jA SE PA KI S105 8P R101 10K R102 10K ZD51 RD5 6ESB3 d KREE EH D Ti T OON S108 XA 8P 2KH z R126 3 9K For R ks 3 PRAN 180K R128 680 Q d OT III wl gE a d LH L 145 Mo R112 47K e 131 R121 R122 10K vin 10K 50V ou A BZ1 5V m 07 wm 51 Nm 54 e e A A A Sl Bl g R103 10K o ST 5 25 103 k Weeden AMP 4P 5 R165 Ge ERS ur 1000P Ral O 5V 50 6
12. SANYO SERVICE MANUAL Microwave Oven EM C1900M UK Pro Code No Model No 437 624 00 EM C1900MUK Foreword Read this manual carefully especially precaution on microwave energy and follow the procedure strictly careless servicing and testing may expose yourself to the microwave energy leakage PRECAUTIONS 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 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 REFERENCE NO SM 6310023 00 TABLE OF CONTENTS Adjustment Procedures veeres a ee 2 Power output Measurement nennen 2 Pre
13. V Parts marked with this sign have special character istics important for microwave leakage When replacing any of these parts use only manufacturers specified parts E 18 4x10 19 57 SS e Tek AN A KE I Parts marked with this sign are supplied with high voltage exceeding 250V Parts marked with this sign have special characteristics important for microwave leakage When replacing any of these parts use only manufacturers specified parts Main body Parts 2 EM C1900MUK KEY No SERVICE PARTS 1 GO 0 O1 R 0 K 11 12 13 14 15 16 17 18 19 20 21 22 23 25 26 28 617 196 9245 415 003 1709 617 214 7628 617 120 3431 617 120 3448 617 206 8220 617 004 5230 617 160 0438 617 004 3724 617 178 1182 617 178 1175 617 178 1168 617 178 1205 617 178 1212 617 187 2217 617 178 1151 617 214 6553 617 214 4474 617 080 4196 617 242 5399 617 122 6379 617 120 3394 617 080 3830 617 080 5179 617 080 5186 DESCRIPTION BLOWER COMP MAGNETRON 2M282K M THERMOSTAT DUCT MAG UPPER DUCT MAG LOWER CAPACITOR MICRO SWITCH MONITOR MICRO SWITCH LATCH MICRO SWITCH DR SENS LATCH LEVER LATCH LEVER LATCH LEVER SPRING SPRING SPRING LEVER STOPPER HARNESS WITH DIODE HV TRANSFORMER SPECIAL SCREW CLIP GROMET FILTER ASS Y SPECIAL SCREW SPECIAL WASHER SPECIAL WASHER 220 NGT OSEN 150C UPPER LOWE
14. and close door several times to make sure sure the door interlock switch and interlock monitor monitor switch operation properly Listen for the clicking sound from switches make sure the interlock monitor switch is closed after the latch interlock switch is open when the door is opened See pages 1 and 8 b Make sure the perforated screen and the choke dielectric of the door are correctly mounted 2 After the power is applied a Open and close the door to see if the interlock mechanism operates properly b Check microwave energy leakage with a leak age detector and confirm the energy leakage is below 5mW c m 3 Do not operate the unit until it is completely repaired if any of the following conditions exists a Door is not closed firmly against the cavity front b The hinge is broken c The choke dielectric or the door seal is dam aged d The door is bent or warped or there is any other visible damage to the oven 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 defective parts in the microwave generating and transmission as sembly especially wave guide 4 Following items should be checked after the unit is repaired a The interlock monitor switch is connected cor rectly and firmly b The magnetron gasket on the magnetron is properly positioned c Wavegu
15. ars in the display TEE t it iH EE tk CE OS 0 Indication of remaining cooking time The volurne of the buzzer SCH gaere 1 To cancel remaining cooking time Operation e Turn the TIMER KNOB to left until display Ly shows 0 oo amp A E corre Na ENT Era La era En The display incicates number of current setting Touch START key first and also touch A boae POWER SELECTION key W until display 2 medium changes 3 loud Turn the TIMER KNOB to change setting e Wien you don t change setting skip steps a e 0 appears in the display e Touch START key e Volume of buzzer is set NE Maintenaunce The microwave ovens are designed manufactured and tested for years of dependable operation Howevre the oven may reguire service from time to time if the consumable components listed below are not replaced at the appropriate time For protection from unexpected service calls and undue inconvenience we recommend that the user has the listed parts replaced at the intervals belows at customer cost This will avoid the trouble of repeated service calls after the expiration of the warranty period Consumable components When more than 1 250 hours of accumulative cooking time or more than 200 000 cycles of door opening closing is observed by key operations See page 13 for more information the following consumable components shoud be replaced Maintenance light in wi
16. cautions and Repair Service Tips 2 Circuit Diagrami EAA naak ni paga pakan andaan 3 CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT BE EXPLOSEDTOTHE MICROWAVE ENERGY WHICH MAY RADIATE FROM THE MAGNETRON OR OTHER MICROWAVE GENE RATING DEVICE IF IT IS IMPROPERLY USE OR CONNECTED ALL INPUT MICROWAVE CONNEC TIONS WAVEGUIDE FLANGES AND GASKETS 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 1 ADJUSTMENT PROCEDURES TO AVOID POSSIBLE EXPOSURE TO MICROWAVE ENERGY LEAKAGE THE FOLLOWING ADJUST MENTS OF THE INTERLOCK SWITCHES SHOULD BE MADE ONLY BY AUTHORIZED SERVICE PER SONNEL PRIMARY INTERLOCK SWITCH INTERLOCK MONI TOR SWITCH AND DOOR SENSING SWITCH AD JUSTMENT Figure 1 1 Loosen 2 screws securing the lever stopper 2 Adjust the lever stopper position so that it is pushed up and pull backward until there is about zero gap between the latch lever and the switch body on the door primary interlock switch and the at the same time there is about zero gap between latch lever and the switch body on the door sensing switch when the door latch is securely locked 3 Tighten the lever stopper screws securely 4 Make sure the interlock monitor switch closes af ter the primary interlock switch opens the door is opened very slowly according to CHECKOUT PROCEDURE FOR
17. eit wi kian n Ss VER BORE pt Wer TRE URE Dn Gen e GR HEN ep gen DO vi Je ER POR Comp Control nn START a zeg mp epp Jr vr ep en em Ae Dun ap en Me en oeh a om e amp 4 AAA AAA ATA When When not Resistance touched_ touched 090 Value Less than More than b Kohms 1 meg ohms anna rmt When checking 900 W key connect ohm meter to the terminal 12 to 1 Bee to the CIRCUIT DIAGRAM on page 3 B TROUBLESHOOTING CONDITION Power is applied with normal voltage Timer is set Touch Select key TROUBLE No display cooking time Cooking opera tion will not start Oven dose not heat up Fuse 10A blows off immediately CHECK L Connection of S110 to S107 Power circuit board See page 6 Control circuit board See page 6 Primary Interlock switch See page 7 Thermal protector Door sensing switch See page 7 Control circuit board See page 6 Control circuit board See page 6 H V Transformer See page 4 H V Capacitor See page 5 Magnetron See page 4 Monitor switch See page 7 Blower motor Step down Transformer rt t RESULT REMEDY Poor Contact Reconnect Voltage Incorrect Voltage incorrect gt No continuity gt No continuity No continuity gt Voltage incorrect Voltage Incorrect Resistance
18. he lever end of the plastic fastener and remove the FPC connector from the connector socket S101 CAUTION When replacing new Display PCB please take big care that all 4 LED heads shoul dexacty be in serted into the square holes of control frame all at once Never force to push any LED lead in the PCB E REMOVING MAGNETRONS 1 Remove 2 screws securing the thermal limitter 2 Disconnect 2 lead wires from the magnetron terminals by removing 2 connectors 3 Remove thermistor lower magnetron by pulling horizontally 4 Remove 4 hex nuts upper magnetron or 2 hex nuts lower magnetron securing to the waveguide 5 Remove lower magnetron 6 Take out 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 make sure the microwave energy leakage is below the limit of the regulation 5mW cm F CHANGING POWERSUPPLY CORD See exploded view on page 15 1 Unfasten 1 screw for earth and pull out 2 wires of power cord from terminal plate 2 Remove1 screw for bottom bracket of cord bushing 3 install the new power supply cord with reverse procedure of above 1 to 2 WARNING For the changing the power supply cord never u
19. he upper Magnetron is located on the inside of the rear plate Le E 7 DISASSEMBLY INSTRUCTIONS OVEN MUST BE DISCONNECTED FROM ELECTRI TRICAL OUTLET WHEN MAKING REPLACEMENTS REPAIRS ADJUSTMENT AND CONTINUITY CHECKS BEFORE PROCEEDING WITH ANY RE PAIR WORK AFTER DISCONNECTING WAIT AT LEAST1MINUTE UNTIL THE CAPACITOR IN THE HIGHVOLTAGE AREA HAS FULLY DISCHARGED A REMOVING PRIMARY INTERLOCK SWITCH See Figure 1 on page 1 1 Disconnect all lead wires from the primary in terlock switch 2 Remove 2 screws securing the lever stopper 3 Remove 1 screw securing the switches Then pullout the switches 4 Make necessary adjustment and make micro wave energy leakage check according to 1 AD JUSTMENT PROCEDURE FOR SWITCHES an page 1 after it is replaced with new one and check proper operation of it according to CHECKOUT PROCEDURE FOR SWITCHES on page 7 B REMOVING INTERLOCK MONITOR AND DOOR SENSING SWITCH See Figure on page 1 1 Disconnect all lead wires from the interlock moni tor switch and door sensing switch 2 Remove 1 screw securing the these switches Then pull out the switches 3 Make necessary adjustments or replacement of switch by the reversing step 2 and check mi cro wave energy leakage according to 1 AD JUSTMENT PROCEDURE FOR SWITCHES on pagel after it is replaced with new one and check proper operation of it according to CHECKOUT PROCEDURE FOR SWITCHES on
20. ide and oven cavity are intact No leakage of microwave energy d The door can be properly closed and the safety switches work properly e The oven must be stopped when the door is opened or the time is up The oven must not be operated with any of the above components removed or bypassed HINT FOR LAMP CHANGE Before removing the cabinet pull out the main plug If you want to check the new lamp with the open Cabinet take care of the following safety cautions Do not touch live parts The lamp holder is not con nected to the earth protection lead by a metric SCrews 5 CIRCUIT DIAGRAM Netz EM C1900M Power Supply Alimentation Netvoeding TA n NOISE FILTER POWER PRINTED Ed CIRCUIT BOARD Geblasemotor Blower motor Ventilation moteur Ventilatiemotor DISPLAY Innenraumlicht PRINTED Cavity light CIRCUIT Lumiere du compartiment BOARD Binnenverlichting START SW Verriegelungsschalter gt Latch interlock O md Switch CONTROL Ei Interrupteur de PRINTED Verrouillage CIRCUIT Vergrendelschakelaar m mn d Interlock Monitor Switch SEN O INTERLOCK a Temperaturbegrenz NC RELAY ungs schalter RL3 RL4 5 O O Thermal limit switch O RL5 RL6 C Interrupteur de lim NC 3 itation de la tempe Interlock 2 TIMER SW rature Monitor Z Thermostaatschak elaar LL T r sensor schalter o Door sensing switch RL7 EE y Interru
21. incorrect Resistance incorrect Resistance incorrect Contact on No continuity Shorted gt Shorted gt Replace Replace Replace Replace Replace Replace Replace Replace Replace Replace Replace or Adjust Replace Replace CONDITION TROUBLE CHECK RESULT REMEDY H V Transformer gt Shorted gt Replace H V Capacitor gt Shorted gt Replace Magnetron gt Shorted gt Replace H V Diode gt Shorted gt Replace Fuse Diode gt Shorted gt Replace banah gt Magnetron ee gt Replace Uneven heating 3 Rotation oftopor e Rotation _ gt Repair or bottom anttena stop replace C ERROR INDICATION This model has some self diagnosis functions Display shows E depending on the trouble DISPLAY E 21 hermistor for duct of cavity top is operated by Buzzer will continuously beep tone Blower over heating of 120 C motor will stop immediately Then oven will stop heating E 31 Thermistor for lower magnetron or duct is shorted Blower motor will stop immediately Then oven will stop heating Thermistor for lower magnetron or duct is dis Oven will stop heating connected or removed from connector socket Blower motor will be operated Thermistor for Magnetron is operated by over Buzzer will continuously beep tone heating of 165 C Blower motor will stop immediately Then oven will stoo heating U 50 The purpose of this function is to p
22. ndow display indicates when accumulativ cooking time reaches 1 250 hours 1 Magnetron Tubu Part No 415 003 1709 2 Printed Circuit Board Relay Part No 617 202 0150 3 Switch base Assembly Part No 617 206 7865 4 Door Latch part No 617 068 1087 When more than 2 000 hours of accumulative cooking time is observed the following consumable components should be replaced 5 Blower motor Part No 617 196 9245 When slow rotating of blower motor is observed after removing dust from blower motor blower motor must be replaced 6 Door hinge Part No 617 120 3028 When a worn door hinge is observed and proper door adjustments can not be made the door hinge must be replaced 7 Door Assembly Part No 617 239 6354 When a worn door pin is observed and proper door adjustments can not be made the door assembly must be replaced o 14 8 EXPLODED VIEW AND PARTS LIST Main body Parts 1 45 4x12 Parts marked with this sign have special characteristics important for microwave leakage When replacing any of these parts use only manufacturers specified parts CS CA CO X Parts marked with this sign have special characteristics important for microwave When replacing any of these parts use only manufacturers specified parts leakage 16 Main body Parts 1 EM C1900MUK KEY No SERVICE PARTS 617 120 285
23. pteur sensitif de porte Deur sensor schakelaar e e Hochspannungs gt L transformator High Voltage transformer Transformateur a haute tension Hoogspannings Hochspannungs transformator transformator High Voltage transformer Kondensator Capacitor Transformateur a Condensateur haute tension Hoogspannings Condensator 1 00 pF transformator a a Kondensator T T Capacitor DB o Condensateur M wy a e m Condensator are Hard 1 00 uF Magnetron O50 850 Magn tron wu Wu SC Zea sl CU Tw Wea WED Magnetron L ors 519 Magn tron Der ner GLEICHRICHTEUR GLEICHRICHTEUR REDRESSEUR REDRESSEUR ANMERKUNGEN7 REMARQUES IMPORTANTES DAS ZEICHEN LA TEILE DIE MIT DIESEM ZEICHEN VERSEHEN SIND FUEHREN HOCHSPANNUNG SECONDARY LE SIGNE UEBER 250V LES PIECES MARQUEES DE CE SIGNE SONT SOUS HAUTE TENSION SUPERIEURES INTERLOCK A 250 V LATCH INTERLOCK DOOR DAS ZEICHEN TEILE DIE MIT DIESEM ZEICHEN VERSEHEN SIND HABEN SPEZIELLE arene INTERLOCK MONITOR SENSING S LE SIGNE lt EIGENSCHAETEN DIE FUER DIE LECKSTRAHLUNG BEI MIKROWELLEN WICHTIG SIND SWITCH SWITCH SWITCH SOLLTE EINES DIESER TEILE AUSGEWECHSELT WERDEN BITTE NUR VOM CONDIT HERSTELLER ANGEGEBEN ERSATZTEILE VERWENDEN ION No TM TM No NO LES PIECES MARQUEES DE CE SIGNE ONT DES SPECIFICATIONS IMPORTANTE DOOROPEN II POUR L IMPERMEABILITE AUX MICRO ONDES DOORCLOSE O IW 6 EN CAS DE CHANGEMENT DE L
24. revent opera Open and close the door and then touch Thermistor Chart 8000 7000 6000 5000 4000 3000 2000 1000 Magnetron Resistance K ohm 0 10 20 30 40 50 60 Temperature C HINT PROCEDURE FOR DETERMING WHETHER THE UPPER MAGNETRON CIRCUIT OR LOWER MAGNETRON CIRCUIT IS DEFECTIVE SYMPTOM One magnetron does not work giving less than normal heat Caution Make sure that cabinet outer wrap and rear plate are not removed from the oven for your safety 1 Operate oven as follows 1 Place a cup of water in the oven 2 Close the door 3 Touch Power selection key 1900W and set 50 seconds by turning TIMER KNOB then ou START key to operate the oven for 50 seconds with full power level 2 Determine if the Exhaust air is warm in the following positions 1 Put your hand near the exhaust duct outside of the rear plate to feel the exhaust Never remove the cabinet and rear plate from the oven for your safety when you put your hand near exhausting duct 2 If air from the upper position of the duct is not warm the upper magnetron circuit is defective If air from the lower position of the duct is hot warm the lower magnetron circuit is defective Cabinet outer wrap Rear Plate Rear Plate Upper position Exhaust Duct Lower position Figure 11 The H V Transformer for operat ing the lower Magnetron is located on the inside of the rear plate The H V Transformer for operat ing t
25. rom the primary winding of the high voltage transformer COMPONENT POWER P C B CONTROL P C B CHECKOUT PROCEDURE RESULT Check each voltage at connector 5104 and 5105 Normal reading after removing each connector female from power circuit board Pin No 3 Ground and 4 5 1 2 at S105 Pin No 1 and 2 at S104 CAUTION Proceed with the test only after removing the wire leads from the primary winding of high voltage transformer for your safety Test procedures a Make sure that the power supply cord is not plugged in b Remove the connector S104 and 105 from the power circuit board c Plug the power supply cord d And then measure each voltage Measure the voltage Between test points TP 1 TP 2 TP 3 and ground See figure 14 on page 23 Note Proceed with the check of the control P C B to see if any one of the measured values is different from the specified values Connection Pin No S105 3 to 4 3 to 5 3 to 1 3 to 2 5104 1 to 2 Test point TP TP 1 TP 2 TP 3 TP 4 Voltage V DC 12 DC 16 DC 30 DC 35 AC 2 4 Voltage V DC 5 DC 12 DC 16 DC 35 Measure the resistance between terminals of connector after removing it from S110 Figure 10 d NOTE When reconnecting the connector make sure the connector are properly inserted to the connector 5110 TCHBOARD Laad POR Comp Timer opp e eu o H pE DRE emm V
26. se other than following Key No Order No Parts Name 5 6171969184 Power cord Ass y UK 6 617078 3132 Cord bush UK 20 617 125 3832 Bottom bracket UK G REMOVING CERAMIC TRAY ASS Y See Fig 11 1 Take off the cabinet 2 Put insert a screwdriver in the 9 mm diameter hole locating at lower hinge of left side of the oven cavity And push the tray up with the screwdriver 3 Open the door and take out the tray very care fully o Door Screw driver H REMOVING DOOR Figure 11 Remove 2 hex nuts securing the upper hinge remove 3 hex nuts securing the lower hinge and remove1 special screwsecuring the door arm located at the bottom of the door sash NOTES After replacing the door be sure to check that the primary interlock switch the door sensing switch and the interlock monitor swich operate normally See pages 1 and 7 After replacing the door check for microwave ene rgy leakage with a leakage detector Microwave energy leakage must be below the limit of 5mW c m a 42 I HOW TO RESET THE MEMORY OF ACCUMU LATIVE COOKING TIME 1 Push the keys step by step as follows Turn the Timer Knob to left until display shows 0 Touch START key first and also touch POWER SELLECTION key 1800W until display changes The display will show accumulative cooking time in the display window 2 Then push the POWER SELLECTION key 1800W during cooking time appear in the display 3 Push the POWER SE
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