SERVICE MANUAL SUPPLEMENT for Model EM-C120
Contents
1. INTERLOCK DOOR MONITOR SENSING INTERLOCK SWITCH SWITCH MADE e DOOR CLOSED Caution The voltage between filament leads of magnetron is about 3 3VA C but the filament carries 4KV DC high voltage with respect to ground Never touch these leads with bare hand during operation 4 TEST PROCEDURES AND TROUBLESHOOTING PRIMARY CAUTION WINDINGS DISCONNECT THE POWER SUPPLY CORD FROM THE WALL bw Secondary OUTLET WHENEVER REMOVING THE CABINET FROMTHE UNIT Windings PROCEED WITH TESTS ONLY AFTER DISCHARGING THE HIGH Ce VOLTAGE CAPACITORS AND REMOVING THE LEAD WIRES ON THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORM d ERS FOR LOWER AND UPPER MAGNETRONS Filament SEE FIGURE 3 Windings A TEST PROCEDURES Figure 2 1 Measure the resistance Normal reading HIGH VOLTAGE With an ohm meter on R x1 scale TRANSFORMER a Primary winding Approximately 1 0 ohms b Filament winding Less than 1 ohm c Secondary winding Approximately 83 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 Note Remove varnish of measured point Figure 3 5 DISASSEMBY INSTRUCTIONS F CHANGING POWER SUPPLY CORD See exploded view on page 5 1 Unfasten 1 screw for ground and pull out the 2 wires of the power cord from the terminal plate 2 Remove 1 screw for the bottom bracket of the c2. eg Ed Dici VC po t 0114 C111 y yr ok AG t1u 50V C33829 gie ESL EON rud ayy 10K Riaz fe n n 0113 KZ are SAGRA gi Seege mem Dida 195133 bi SIE COR MAO AMD HO PED ANNI stt RIALO RIR R140 2 TK Dm S ie men RIGA 2 7K s d n 8163 2 7K eee md DT CHIn3 1000Px5 TR 0110 Ai348 e AN af dai A 0116 porch 10K d 0108 C3402 aet dior Y Po R498 Mic NI d TE 10k 7 0107 62402 84 20K ey Uiss i338 DO RLI PIO Le p X CARA eee 8134 i A TK 10K e115 O 35V 30Y C a3 0 Of es BOY o O14 a 15 L LLL SEET Wiring of High voltage Circuit Upper Magnetron Red wire Lower Magnetron Red wire Filament Winding Black A Pink Light Blue d Red wire Lower Transformer Filament Winding K Transformer Red wire Wiring of Switches Upper Capacitor Monitor switch s AN Brown C Inside ae I9 Orange C Case e Blue NC Inside Tt Pink NO Insde n Brown Viewed from back Ss a e ange di Are White y IST Black Yellow Interlock switch Purple SG Purple LL Bin A Door sensing switch 16 GARLAND
3. GARLAND SERVICE MANUAL SUPPLEMENT for Model EM C120 Microwave Oven CAUTION WARNING TO SERVICE TECHNICIANS 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 e i A microwave leakage check to verify compliance with the Federal performance standard should be performed on each oven prior to release to the owner For U S A e ii A microwave leakage check to verify compliance with the Canadian Regulation HEALTH AND WELFARE SOR 79 920 should be performed on each oven prior to release to
4. tively 2 Use an accurate thermometer and measure each water temperature respectively 2 Place beakers side by side in center of the ceramic tray 3 Close the door set the TIME for two minutes Touch the START key and heat the water for exactly two minutes 4 Take the beakers out immediately stir the water and measure the water temperatures respectively 5 Calculate the temperatures rise of water in each beaker Then calculate the average value of the two temperature ses rei 6 The teperature rise shall be in the following range Average Temp Rise Minimum 15 4 C Maximum 18 8 C Power output is affected by the line voltage under load 7 For correct Power output measurement the line voltage under load must be 120 2 Volts 3 CIRCUIT DIAGRAM CIRCUIT DIAGRAM FOR i ac120v LI MODEL EM C120 _ PRINTED CIRCUIT BOARD NOISE FILTER SECONDARY 3 lt INTERLOCK sw INTERLOCK Q Em CONTROL o eus TOUCH KEY PRINTED S103 PANEL CIRCUIT o 00 0 29 e BOARD LTE LO PROTECTOR o THERMAL 270 HV TRANSFORMER omg DIANA ee RAMAN S it VIII Age CANONS ea es VOLTAGE CAPACITO R IR I SW Switch BM Blower GM Antenna Motor CL Lamp ITOR HIGH MAGNETRON S THERMISTOR Se CAPAC HIGH l y C CAVITY FIRE 4 THERMISTOR poon BENI PRIMARY MAGNETRON MAGNETRON INTERLOCK LOWER UPPER
5. 1 SPECIFICATIONS Microwave output 1 200W to 120W Frequency e 2 450MHz Power supply 120V 60Hz Rated current 15 Amp Safety Device Thermal protector Magnetron 150 C 270 F Open Thermostat 80 C 144 F Close Thermistor Magnetron 200 C 360 F Open 108 C 194 F Close Thermistor Duct 120 C 216 F Open Fuse Cartridge Type 250V 10A Micro switch Relay Interlock Switch Interlock monitor Switch Door sensing Switch and Relay RL 3 and RL 4 Max input time Electronic Digital up to Manual 10min Memory 30min 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 1liters Net weight 29Kg Test PROCCOUICS iei eo vates donde dau at an 3 Disassembly Instructions 3 44 Exploded View and Parts List 5 12 Overall Circuit Diagram 13 016 2 POWER OUTPUT MEASUREMENT NOTE The power output specification 1200W on this model is measured with IEC measurement The power output is measured with two 2 liters water is equiva lent to 1200W in measurement with IEC when mea sured with the following power output 1 1 Fill two beakers one liter of tap water respec
6. PEL PIO ond POT POR POS OA POI i POR 1 POF eoot 4 VEE PGA ANG P61 CANI PG LARE VEC VREF AVSS VSS Paty ENT Pasi mond P21 FES FARI 4 Pas LCHF 24 4 PAZ XIN XOUT d NU 48 ep ie pe SE ee 3 LOK tok iov 6 o 100K 100K PTL bm PIG CPO PIB CPO PRA CPOE PiIS3CDI PE CPD FLID PIOPPO FOT CPO POS CPD POS CPO f POA CPO POS CRO sont OS CP 4 POL CPD FOO PO VEE PGS FANS LMB857 35688 Pt KE C 1 1 roz ARZ YEG YREF AVS Vas Pag PINTO PeR PD qj P21 P0 4 POLPO P63 FANI Pas AIZNTRA PAR NIN HERAF DN d 5102 Door m 8e Sens ing PT SW Pay Pag gemet A A one amp Ot u 50Y ag RIBI 100K T Rise l dar Hae 10K piss 580V ea Pag O 5V piz2 urcosa d 6 110 13f E Ee T E Sd cato w PEO fog PAN i PES prre pr wide P54 PRI esa fm Hotty IT POL p a START 9 MEMORY POWERIT I ME ia EI DN f t io ie Co S Dou im ar pra e enn ma K i tal x ce Pica 1000P 50v PSO fremont AAA 5v 8143 100K 256340344 80 Lok EIL M ws pa L Aia dl ma or seer tn a ese UD a LOK I m d 10K LD par LI nl appt 9 e i TI MASS nr i a 32 p33 en Greg anlag PB
7. the pattern outline shown below when the door surface is surveyed NOTE Periodically check to be sure that the probe tip is not worn or dirty The following U S standard applies to microwave ov ens 21 CFR 1030 10 Performance Standard for Microwave Ovens It requires that the power density of the microwave radiation emitted by a microwave oven shall not ex ceed five 5 milliwatts per square centimeter at any point 5 centimeters about 2 inches or more from the external surface of the oven All microwave ovens exceeding the emission level of 4 mW cm must be reported to Dept of Service for mi crowave ovens and the manufacturer immediately The owner should be told not to use the microwave oven until it has been repaired completely If a microwave oven is found to operate with the door open report to Dept of Service the manufacturer and CDRH immediately Also tell the owner not to use the oven CDRH Center for Device and Radiological Health The interlock monitor switch acts as the final safety switch protecting the customer from microwave radia tion If the interlock monitor switch operates properly and the door interlocs switch fails the fuse will blow If this happens all interlock switches must be replaced The contacts of the interlock switches may be welded together Power output Measurement 1 Precautions and Repair Service Tips 1 Gircult RU e EE 2
8. 212 121 149 120 120 207 020 PART ND 2854 9584 3639 3520 1561 1332 1349 6087 3844 4230 3963 3387 5147 3592 3370 35599 1264 1505 6477 9446 2110 6484 9422 3325 8535 9265 3054 3349 3332 6836 2708 DESCRIPTION sss CABINET FRAME PLATE ASS Y INSU SHEET FRAME REAR PLATE ASS Y CORD ASS Y CORD BUSH BOTTOM BRACKET FRAME BRACKET P C B COMP RELAY SHELF ASS Y DUCT LIGHT OPENING COVER LAMP 120V 20M LAMP SOCKET PROTECT COVER THERMISTOR ASS Y THERMAL PROTECTOR 140 C CERAMIC RES 25 OHM 20W P C B COMP CONTROL P C B COMP NOIZE FILER TERMINAL PLATE P C B COMP POWER GEAR MOTOR ANTENNA SHAFT ANTENNA BEARING CLIP ANTENNA LOWER SPECIAL NUT _ ANTENNA UPPER CLIP FUSE 250V 10A 4 PO PO PO Re PO PO PO og po ee jh NN ho RA FO fO fO 5 RR ORA RR L La RA o bo Au pe Main body Parts 2 NOTE All component have special characteristics for safety and must be replaced using parts listed In this manual All service on M W ovens should be performed by a qualified technician using approved testing equipment Customers should not attempt replace component marked with a A symbol t geg ef Sie ef e pue ae Ee iii er 4 4x10 NOTE All component have special characteristics for safety and must be replaced using parts listed in this manual All service on M W ovens should be performed by a qualified techni
9. KEY NO SERVICE PART NO DESCRIPTION ssi Ot 617 201 9697 DOOR HANDLE 617 201 9680 DOOR BASE 617 120 3127 ORNAMENT PLATE LOWER 617 120 3110 ORNAMENT PLATE UPPER 617 120 3073 DOOR COVER 617 209 9385 DOOR PANEL 617 121 5489 PACKING 617 178 0734 DOOR ASS Y 617 178 1441 DOOR PANEL 10 617 178 0840 CHOKE DIELECTRIC 11 617 120 3028 HINGE 12 411 089 2500 WASHER F 5X10X0 8 13 617 080 3847 SPECIAL SCREW 15 617 068 3623 DOOR ARM 17 617 068 1087 DOOR LATCH 18 617 140 5392 SPRING 19 617 068 3579 ARM PIN om oO wb B UID rs i 1 1 1 1 1 e 1 1 1 2 2 1 1 e 2 Note DOOR ASSEMBLY Part No 617 178 0734 consists of parts listed on the above Key 1 thru 19 EE Control panel Parts NOTE All component have special characteristics for safety and must be replaced using parts listed in this manual All service on M W ovens should be performed by a qualified technician using approved testing equipment Customers should not attempt replace component marked with a A symbol S 617 205 1161 KEY BOARD 617 120 3516 CONTROL PLATE 617 120 3493 CONTROL BASE 617 201 9895 ORNAMENT PLATE 617 073 7616 CAVITY GASKET 617 073 9672 PACKING COVER 617 211 7904 P C B COMP DISPLAY 617 125 9872 INSU SHEET 617 208 3377 CONTROL COVER vi CO OS ua P tf P9 I 1 1 1 1 1 1 1 1 1 Items not illustrated 617 130 3797 MENU LABEL 1 617 205 1376 OPERATING INSTRUCTIONS 1 12 CO
10. NTROL CIRCUIT BOARD d e Neien CN Ii tbe PRE 1018 bed A sd 3 22 5 Ravage e d F UE l DK 4133 REIT IENE TABI SA 1482 13 8 OVERALL CIRCUIT DIAGRAM we 8109 UP JE reg agit RAI Y n de F2 FUSE EI MIS reque AE SETRE jLTER T a CPR2411GM TT BOISE f e e amp i ae e s EN bd amp H s ui in E Lad gw SS sent THERMAL 1 Lo RIOOL 10K R103 10K Ss NT R104 10R moe SY T K ci6 2 1000P 50V 5 TT EELA RIGO 10K o CE w te id fe E tNTERLOCX id QC R102 10K CHWITOSR Se 5 MONITOR Sv H v BELLE UE ae THERMAL PROTECTOR THERMAL PROTECTOR AAA BON R107 10K RITI 47 SK RA C149 3 1000P 80V MAGNETRON MAGNE TRO LOWER UPPER Cied DO 0j 81 1000P 50V MI OI sa VSTI vsT2 0 1u 25VvT__ 3 32 GEN Oum seme R22 LOK QLCIOT HE E l zi SY BY RE26 3 BK OO 0 s Sin EU OMO E ozon OOK i R124 0113 i GR 1090 25y e 40 P201 DG 010 504 80182583x2 2213 2012 8 E R129 100K a 23 EBVO Rizo 100K 4 254 0108 C3402 Ca eta 1000u d MPGOGG C31 W ER E 1 Tet Cio PIZZI
11. cian using approved testing equipment Customers should not attempt replace component marked with a A symbol Main body parts 2 KEY NO 1 617 d 415 3 617 A 617 5 617 6 617 8 617 9 617 10 617 11 617 12 617 13 617 14 617 15 617 16 617 17 617 18 617 19 617 20 617 21 617 Z 617 e3 617 4 411 25 617 _ 26 617 28 617 29 411 30 617 Note SWITCH BASE ASSEMBLY Part No 617 205 1208 consists of parts listed on the above Key ep thru 17 SERVICE 140 002 140 120 120 184 118 160 004 178 178 178 178 178 187 178 209 205 080 122 122 120 004 080 080 080 055 078 PART_NO 1585 7702 1257 3431 3448 8441 9247 0438 3724 1182 1175 1168 1205 1e12 2217 1151 9453 1260 4196 8908 6379 3394 3506 3830 5179 5186 0202 3422 DESCRIPTION 000 LL BLOWER COMP MAGNETRON 2M 232K M THERMAL PROTECTOR 150 C DUCT MAG UPPER DUCT MAG LOWER HN CAPACITOR 0 6MFD 2 4K MICRO SWITCH MONITOR MICRO SWITCH DOOR LATCH MICRO SWITCH DOOR SENSING LATCH LEVER LATCH LEVER LATCH LEVER SPRING SPRING SPRING LEVER STOPPER HARNESS WITH H V DIODE H V TRANSFORMER SPECIAL SCREW CLIP GROMMET AIR FILTER ASS Y NUT HEX FLG WZSRT5 SPECIAL SCREW SPECIAL WASHER SPECIAL WASHER gt 0000 NUT HEX 5 wie wes ee PROTECT PACKING oe La e TO ose ORG k t PO k Sch k BO PO UM FO de t de de RA t de deb RR PO R BR k oh OD RA DI Door Parts
12. ord bushing 3 Install the new power supply cord with the reverse procedure of above 1 to 2 WARNING For changing the power supply cord never use other than the following Key No Order No Parts Name 5 617 140 1561 Power cord Ass y 6 617 140 1332 Cord bush 7 617 140 1349 Bottom bracket Maintenance The microwave ovens are designed manufactured and tested for years of dependable operation However the oven may require 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 below 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 the following consumable components will be replaced Maintenance light in window display indicates when accumulative cooking time reaches 1 250 hours EJBBg 58H o oo Light 1 Magnetron Tube Part No 415 002 7702 2 Printed Circuit Board Relay Part No 617 137 3844 3 Switch base Assembly Part No 617 205 1208 4 Door Latch part No 617 068 1087 When more than 2 000 hours of accumulative cooking time is observed the following consumable compo nents sh
13. ould be replaced 5 Blower motor Part No 617 140 1585 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 617 178 0734 When a worn door pin is observed and proper door adjustments can not be made the door assembly must be replaced 6 EXPLODED VIEW AND PARTS LIST Main body Parts 1 4x12 NOTE All component have special characteristics for safety and must be replaced using parts listed in this manual All service on M W ovens should be performed by a qualified technician using approved testing equipment Customers should not attempt replace component marked with a A symbol NOTE All component have special characteristics for safety and must be replaced using parts listed In this manual All service on M W ovens should be performed by a qualified technician using approved testing equipment Customers should not attempt replace component marked with a A symbol Main body parts 1 KEY NO SERVICE 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 402 617 617 617 617 617 617 617 617 617 617 617 617 423 120 055 137 130 140 140 140 179 137 120 223 120 005 120 120 130 140 061 208 209 192 208 209 120
14. the owner For CANADA FORM EM C120 02 05 CAUTION For microwave energy emission On every service call A check for micro wave energy emission must be made according to the following manner Measurement of energy emission Measurement must be made with the microwave oven operating at its maximum output and containing a load of 275 15 milliliters of tap water initially at 20 5 celsius 68 9 F placed within the cavity at the center NOTE The water container must be a 600 milliliter bea ker and made of an electrically none conduc tive material such as glass or plastic The cook tray must be in place when measuring emission A properly operating door and seal assembly will nor mally register emission no greater than 4 mW cm to allow for measurement uncertainty with the cooking shelf or tray in place All repairs must be performed in such a manner that microwave energy emission Is minimal Follow the instructions supplied with the detector be ing used and perform an R F emission test around the door front and all edges and vent of the outer case The cabinet wrapper must be in place and the oven fully assembled When performing an emission survey with the meter on FAST RESPONCE the movemint of detector probe shall not exceed one 1 inch per second In the area emitting the highest reading switch the meter to SLOW RESPONSE and take a reading for minimum of three 3 seconds We recommended
Download Pdf Manuals
Related Search