SERVICE MANUAL SUPPLEMENT for Model EM-C160
Contents
1. GARLAND SERVICE MANUAL SUPPLEMENT for Model EM C160 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 11 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 to2. PACKING DOOR ASS Yy DOOR PANEL p CHOKE DIELECTRIC HINGE WASHER F 5X10X0 8 SPECIAL SCREW DOOR ARM DOOR LATCH SPRING ARM PIN PI PO PI e p PY PY p p ps PJ jue pu pb pu pt Control panel Parts KEY NO SERVICE PART NO 1 gt 3 4 5 6 7 A 5 Items not illustrated 617 617 617 617 617 617 617 617 617 KEY NO SERVICE PART NO 205 120 120 201 073 073 211 125 208 1161 3516 3493 98953 7616 9672 7904 9872 3377 617 130 3797 617 205 1376 CONTROL BASE 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 com ponent marked with a A symbol Pan ame E DESCRIPTION u an 9 KEY BOARD CONTROL PLATE ORNAMENT PLATE CAVITY GASKET PACKING COVER P C B COMP DISPLAY INSU SHEET CONTROL COVER padi u u po pmb jol e pot p MENU LABEL o FE 4 OPERATING INSTRUCTIONS 02 1 ee CONTROL CIRCUIT BOARD AMT gt nim JOR A TE ten o ARER O EEN FE Ae Mee He ana eg IRSE ARANA RADAR EN ER AN IA a O HS AMNION TA BONE 0 URIEL ARA IMA Y o ND ORR A LE E ee RE y 3 TON 1018 IS O ger RI IDAS A ES Ma WA Nengah aa Fe RI ZN Tan Sie SA Fra m 3 y cos lt Osa mos Rg
3. 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 20W 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 AS Py r py pe e P3 ro A E ES EA 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 woe a ah s DT AS an a a a a a a aa S an 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 technician using approved testing equipment Customers should not attempt replace component marked with a A symbol Main body Parts 2 KEY NO SERVICE PART NO DESCRIPTION __ Note SWITCH BASE ASSEMBLY 17 617 415 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 411 617 617 617 411 617 140 002 140 120 120 197
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5. the owner For CANADA FORM EM C160 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 275415 milliliters of tap water initially at 20 5 celsius 689 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 RESPONGE the movement of the detector probe shall not exceed one 1 inch per second Inthe area emitting the highest reading switch the meter to SLOW RESPONSE and take a reading for minimum of three 3 seconds We recommen
6. 118 160 004 178 178 178 178 178 187 178 209 205 080 122 122 120 004 080 080 080 055 078 1370 6408 1257 3431 3448 5604 9247 0438 3724 1182 1175 1168 1205 1212 2217 1151 9453 1253 4196 8908 6379 3394 3506 3830 5179 5186 0202 3422 BLOWER COMP MAGNETRON 2M254 M THERMAL PROTECTOR 150 C DUCT MAG UPPER DUCT MAG LOWER CAPACITOR 0 93MFD 2 4KWV 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 a TRANSFORMER N6T C160US SPECIAL SCREW CLIP GROMMET a amp AIR FILTER ASS Y NUT HEX FLG W SRT 5 SPECIAL SCREW SPECIAL WASHER SPECIAL WASHER NUT HEX 5 PROTECT PACKING Part No 617 205 1208 consits of parts listed on the above Key 8 thru AN 5 Fa PTR os Door Parts KEY NO SERVICE PART NO DESCRIPTION _ 1 2 3 4 5 6 gt 8 9 617 617 617 617 617 617 617 617 617 10 617 11 617 12 411 13 617 15 617 17 617 18 617 19 617 Note DOOR ASSEMBLY Part No 617 178 0734 consits of parts listed on the above Key 1 thru 19 201 201 120 120 120 209 121 178 178 178 120 089 080 068 068 140 068 9697 9680 3127 3110 3073 9385 2489 0734 1441 0840 3028 2500 3847 3623 1087 5392 3579 DOOR HANDLE DOOR BASE ORNAMENT PLATE LOWER ORNAMENT PLATE UPPER DOOR COVER DOOR PANEL
7. ded 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 interlock 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 TABLE OF CONTENTS SDECIICALIONS ir laa 1 Power output Measurement cccoccccccccccnccncncnonnnnnnnnon 1 Test Procedu
8. 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 2 4 EXPLODED VIEW AND PARTS LIST mis Main body Parts 1 5 1 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 PART NO DESCRIPTION DM SM e 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 617 402 617 617 617 617 617 617 617 617 617 617 617 617 423 120 055 137 130 140 140 140 179 137 120 223 120 005 120 120 130 140 061 210 209 192 208 209 120 212 121 149 120 120 207 020 2854 9584 3639 3520 1318 1332 1349 6087 3844 4230 3963 3387 5147 3592 3370 3599 1264 1505 3419 9446 2110 6453 9422 3325 8535 9265 3054 3349 3332 6836 2708 CABINET ce FRAME PLATE ASS Y INSU SHEET FRAME REAR
9. res lassen 2 Exploded View and Parts List 3 10 1 SPECIFICATIONS Microwave output 1 600W to 160W FrEQUENCY coooccccccconcncnncnonanoss 2 450MHz Power supply oocccoccccocncooo 208V 60Hz Rated current 13 Amp Safety Device Thermal protector Magnetron 150 C 270 F Open Thermostat 80 C 144 FP 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 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 32Kg Control Circuit BOard c ccccceccececcececeeees 11 2 POWER OUTPUT MEASUREMENT NOTE The power output specification 1600W on this model is measured with IEC measurement The power output is measured with two 2 liters water is equiva lent to 1600W in measurement with IEC when mea sured with the following power output 1 1 Fill two beakers one liter of tap water respec tively 2 Use an accurate thermometer and measure each water temperature respec
10. tively 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 temperature rise of water in each beaker Then calculate the average value of the two temperature rises f ct 6 The teperature rise shall be in the following range Average Temp Rise Minimum 20 5 C Maximum 25 1 C Power output is affected by the line voltage under load 7 For correct Power output measurement the line voltage under load must be 208 2 Volts 3 TEST PROCEDURES AND TROUBLESHOOTING PRIMARY CAUTION WINDINGS DISCONNECT THE POWER SUPPLY CORD FROM THE WALL SS Secondary OUTLET WHENEVER REMOVING THE CABINET FROM THE UNIT Windings PROCEED WITH TESTS ONLY AFTER DISCHARGING THE HIGH A VOLTAGE CAPACITORS AND REMOVING THE LEAD WIRES ON THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORM ERS FOR LOWER AND UPPER MAGNETRONS Filament SEE FIGURE 1 Windings A TEST PROCEDURES of Figure 1 COMPONENT CHECKOUT PROCEDURE RESULT 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 50 ohms 2 Measure the resistance Normal reading with an ohm
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