SERVICE MANUAL SUPPLEMENT for Model EM-S100
Contents
1. 2 00 in the display window Touch the START key and heat the water exactly for two minutes 4 Take the beakers out immediately stir the water and measure the water temperature respectively 5 Calculate the temperature rise of water in each beaker Then calculate the average value of two temperature rises Output power can be calculated by the equation Power Output W 70 x Dt Where Dt is an average temperature rise in degrees Centigrade 6 Output shall be in the following range AverageTemperature Rise Power Output Minimum 10 9 C 763W Maximum 14 0 C 980W Power Output is affected by the line voltage under load 7 For correct Power Output measurement the line voltage under load must be 120 2volts 1 a Before the power is applied Open and close door several times to make sure the primary interlock switch the interlock monitor switch and the door sensing switch operate proper ly Listen for the clicking sound from the switches Make sure the interlock monitor switch closes after the primary interlock switch is opens when the door Is Opened See pages 1 and 6 Make sure the perforated screen and the choke dielectric of the door are correctly mounted After the power is applied Open and close the door to see if the interlock mechanism operates properly Check microwave energy leakage with a leakage detector and confirm the energy leakage is below 5 mW cm Do not operate the2. GARLAND SERVICE MANUAL SUPPLEMENT for Model EM S100 Microwave Oven CAUTION WARNING TO SERVICE TECHNICIANS PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE IO 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 t
3. 617 225 2377 Washer Receptacle Rest Turn Table Antenna Complete Protective Cover SCR TPG TRS 4x 6 DA SCR TPG PAN 3 x6 Z1 Thermal Fuse 167 C Special Washer Protective Cover Protective Cover Cover AA AA AA AA sesch Ill SWITCHES AND MICROWAVE PARTS NOTE All component have special characteristics for safety and must be replaced using parts listed in this manual All service on MAN ovens should be performed by a qualified technician using approved testing equipment Customers should not attempt replace component marked with a AN symbol Key Z O Part No Description Q ty 200 JO O1 OQ NN i ch do N O O1 Bb W N 411 082 5201 617 200 9278 617 199 8283 411 006 6604 617 124 1235 415 002 6101 423 014 2509 617 177 6157 617 201 6382 617 162 1990 617 197 6670 617 182 2373 411 011 5609 617 198 4996 617 206 9180 617 124 1280 617 197 7417 SCR TPG TRS 4 x 10 Z1 H V Transformer YS P360 Stay Cavity amp Magnetron SCR TPG PAN 3x6 Z1 Thermostat Magnetron 122 C Magnetron 2M219H B A Fuse 250V 15A Power PCB Lead Wire Ass y including Diode Space Partition Blower H V Capacitor including Resistor 0 97 uf 2 2KV Capacitor Band Bolt Hex 4 x 10 Z1 Duct Mag Exhaust Lamp 125V 15W Lamp Socket Blower Motor mb sch h AA AA o bo sch o mb ll ll ll PL Key NO Part No Descripti
4. CHECKOUT PROCEDURE FOR SWITCHES on page 6 6X Make sure the microwave energy leakage is below the limit of the regulation 5mW cm when measured with a dectector All service adjustments must be made for minimum microwave energy leakage readings For U S A 6 Make sure the microwave energy leakage is below the limit of 1mW cm at 275cc water load 5mW cm at no load and 5mW cm at 275cc water load without cabinet when measured with a detector All service adjustments must be made for minimum microwave energy leakage readings For Canada Test Procedures and Troubleshooting 4 10 Disassembly Instructions 11 14 Exploded View and Parts List CN 15 19 Overall Circuit Diagram 20 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 2 on the control circuit board the door sensing switch and the electric circuit related on the door sensing switch which act as Secondary Interlock Switch Door Latch Lever Stopper Door Sensing Switch Interlock Monitor Switch Screws Figure 1 Latch Lever Primary Interlock Switch 2 SPECIFICATIONS 4 PRECAUTIONS AND REPAIR SERVICE TIPS PRELIMINARY SINCE NEARLY 2 000 VOLTS EXISTS IN SOME CIRCUITS OF THIS MICROWAVE OVEN REPAIRS SHOULD BE CARRIED
5. OUT WITH GREAT CARE TO AVOID POSSIBLE EXPOSURE TO MICROWAVE ENERGY LEAKAGE THE FOLLOWING PRE CAUTIONS MUST BE TAKEN BEFORE SERVICING Rated Power Consumption 1600W A Microwave Output 1000W i Frequency 2 450MHz 50MHz Power Supply 120V 60Hz Rated Current 12 9Amp B Safety Devices Thermal Fuse open at 167 C for Cavity Thermal Protector open at 122 C for Magnetron Fuse Cartridge Type 15A Primary Interlock Switch Door Sensing Switch and Relay 2 Interlock Monitor Switch TMC upp ud eund REGE as Electronic Digital up to 99 min 99 sec Overall Dimensions 525 W x 420 D x 283 H mm Oven Cavity Size 350 W x 371 D x 208 H mm Turn Table Diameter 340mm Effective Capacity of Oven Cavity 26 liters Net Weight Approx 16 5kg 3 POWER OUTPUT MEASUREMENT NOTE The power output specification 1000 W on this model is measured with IEC measurement The power output is measured with two 2 liters water is equivalent to 1000 W in measurement with IEC when measured with the following power output 1 Fill two beakers glass or plastic with each one liter of tap water about 20 C and measure the water temper ature Use a thermometer with a 1 10 degree gauge 2 Place the beakers side by side in the centre of the glass tray 3 Close the door set the TIME for two minutes
6. Power Output Measurement 2 Precautions and Repair Service Tips 2 Circuit Diagram 3 1 ADJUSTMENT PROCEDURES TO AVOID POSSIBLE EXPOSURE TO MICROWAVE ENERGY LEAKAGE THE FOLLOWING ADJUSTMENT OF THE INTERLOCK SWITCHES SHOULD BE MADE ONLY BY AUTHORIZED SERVICE PERSONNEL The service center should have the designated detector to measure the microwave energy leakage after the repair or adjustment NOTE Detector to be used at the service center is NARDA 8100 8200 or the equivalent PRIMARY INTERLOCK SWITCH INTERLOCK MONITOR SWITCH AND DOOR SENSING SWITCH ADJUSTMENT Figure 1 1 Loosen 2 screws securing the lever stopper 2 Adjust the lever stopper position so that it is pushed forward and pull backward until there is about zero gap between the latch lever and the switch body on the primary interlock switch and at the same time there is about zero gap between the door latch 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 after the primary interlock switch opens when the door is opened very slowly according to CHECKOUT PROCEDURE FOR SWITCHES on page 6 5 Make sure the interlock monitor switch opens before the primary interlock switch closes when the door is closed very slowly according to
7. e RELAY 1 a9 CONNECTOR 102 Te NO DOOR SENSING SWITCH A I L EES CONNECTOR si S101 CAPACITOR Ee CIRCUIT RESISTOR 0 97MFD STEP DOWN BOARD MAGNETRON 10 MEG OHM 2 2KV TRANSFORMER 2 Figure 2 NOTE All component have special characteristics for safety and must be replaced using parts listed in this manual All service on MAN ovens should be performed by a qualified technician using approved testing equipment Customers should not attempt replace component marked with a AN symbol Caution The voltage between filament leads of magnetron is about 3 3VA C but the the filament carries 4KV DC high voltage with respect to ground Never touch these leads with bare hand during operation 6 TEST PROCEDURES AND TROUBLESHOOTING AUTIO DISCONNECT THE POWER SUPPLY CORD FROM THE WALL OUTLET WHENEVER REMOVING THE CABINET FROM THE UNIT PROCEED WITH THE TESTS ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE LEAD WIRES FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER SEE FIGURE 3 Secondary Windings A TEST PROCEDURES Filament Windings Primary Windings Figure 3 COMPONENT CHECKOUT PROCEDURE RESULT 1 Check for resistance Across the filament terminals of the magnetron with an ohm meter on H x 1 scale 0 Ohm meter MAGNETRON Figure 4 2 Check for resistance Between each fila ment terminal of the magnetron and
8. enesgeegg a oa oe gt seeoespo es an o e WEE PO ecoccoci eee ege od PS ggf soso PEEL w PS 69909909 e Lo y Ly Y ae Blower Motor E REMOVING FUSE Remove the 15A fuse with a screwdriver NOTES When replacing the 15A fuse be sure to use an exact repair part f the 15A fuse blows immediately check the primary interiock switch the relay 2 on the control circuit board and the interlock monitor switch according to CHECKOUT PROCEDURE FOR SWITCHES on page 6 And make sure to check the microwave energy leakage according to 1 ADJUSTMENT PROCEDURES on page 1 when the primary interlock switch the relay 2 or the interlock monitor switch is adjusted or replaced If the primary interlock switch the relay 2 and the interlock monitor switch operate properly determine which of the followings is defective control circuit board blower motor high voltage transformer high voltage capacitor high voltage diode or magnetron REMOVING CONTROL CIRCUIT BOARD See exploded view on page 18 and Figure 13 1 Remove the connector S1 S102 and the connector for the relay 2 from the control circuit board 2 Remove 1 screw securing the control panel complete to the oven cavity 3 Remove the FPC connector from the connector S101 while grasping up both lever ends of the plastic fastener 4 Remove 2 screws securing the control circuit board to the control base 5 Lif
9. p 8 Q YA 103 e gd LOBOS lou h 2 1015 S 8 0z 2 Paral P T z zh uc BIA e i a JO 75 as s cp 24 2 2 e SEN P 2 SO TP 1 age CH o M NN TP 2 SS bos ol DS CR Rug S 0920 RIT 9 ww u TP 4 SE gt N R109 RIS C gt o Q R e TP 5 St as ee NO R17 gt x ZD13 CH D 2 R18 30 0 De o C gt R19 E D 20 D CH 3 20 olg D103 J ZD12 O i H D R J7 a GROUND C es Zi ld 9 OVERALL CIRCUIT DIAGRAM AOS CH wa Aa e 901H 1015 aa QU I IME ML x9 LOLH Lord E el LINDYID ASZILVLO NOI LVZIIVILINI Lolo LINDHIO lOHINOO NIVIN NN ARIAS ASL 91d O Suma ih a 6BLLY 2010 MET SLLY olla NSHI MOOTHALNI JOHINOO H3MOd REENEN RE lt lt quvoq AJA dol LOLS Sold tela AOS d0001 ACE FILLY MiP SILA Jtr VIG 010 MOL q 0096 0cLH MEF c8919 LUH oo Aosiit 2 2 010 09 MOOL CL MOOL 8214 S M00l cl AS 6c AOS d00L SOLO dqge LBW 1 LNOX NIX td LHINO Std ENY 9d ddozd dd Izd dd eed ttd 3dA dd 00d dd l d dd 20d dd 80d dd 0d dd S d dd 90d dd 40d dd Old dd Ild dd Zld dd id dd tld dd S 1d ad id LINDYIO AlddNS HAMOd ZHAN ISH AO M DOZZ AL
10. NORTE ker a aa J GARLAND
11. ROL PANEL PARTS NOTE All component have special characteristics for safety and must be replaced using parts listed in this manual All service on MAN ovens should be performed by a qualified technician using approved testing equipment Customers should not attempt replace component marked with a id Part No Description Q ty d Part No Description Q ty 4 617 208 7634 Control Frame 5 617 124 1129 Control Base 6 411 160 6205 SCR TPG TRS SRT 4 x 10 Z1 7 617 206 7964 Power amp Control Circuit Board 8 9 1 1 617 208 7610 Control Sheet Also order Touch Key 1 Board when replacing Control Sheet 2 6172072548 Touch Key Board Also order Control 1 Sheet when replacing Touch Key Board 3 6171241341 Control Plate 1 411 129 5805 SCR TPG BIN 3 x 10 Z1 617 080 9559 Spring Door Release Lever 0 617 124 1143 Door Release Lever PO N sch PRINTED MATTER Items Not Illustrated Se Part No Description Q ty 617 208 7757 Operating Instructions 1 617 208 7702 Carton Box Complete 1 617 208 7597 Name Plate 1 CONTROL CIRCUIT BOARD Part No 617 206 7964 EE C DTT KPC 4594V 0 ICH SEL bie o D122L1q5 SE EE MD HB TIL RIGS RI37 RISB 550200000001 1 6008 121 rut Ta a R a ala e Du R3 RRRS 22 R125 c lt G oF Sp Q 2 c101 Dune A e S Or O00000 Sa a opt HE o NN B YY cO 37N 220 A RIO 01
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14. ard you Figure 10 a Switch Stoppers 5 Make necessary adjustments or replacements of the Interlock door sensing switch by reversing step 3 and check GE i microwave energy leakage according to 1 ADJUSTMENT PROCEDURES on page 1 after it is replaced with new one and check proper operation of it according to CHECKOUT PROCEDURE FOR SWITCHES on page 6 Primary Interlock Switch Upper kel Switch Stopper Z DOOR Lan SENSING SWITCH Switch Stoppers Figure 10 b Interlock Switch Replacement when replacing faulty switches be sure switch mounting tabs are not bent broken or otherwise deficient in their ability to secure the Lower switches in place Switch Stopper Figure 10 a C REMOVING BLOWER MOTOR Duct mag exhaust Blower Base Figure 11 Top View and 12 1 Remove screw securing the stay 2 Disconnect all lead wires from the blower motor Thermal Protector and H V capacitor Screw J 3 Remove 2 screws securing the blower base and SJ disengage 3 hooks from the rear plate of cavity Figure 12 4 Remove 1 screw securing the blower motor with the blower base D REMOVING MAGNETRON Figure 11 Top View After removing the blower motor Stay Duct mag intake 1 Remove duct mag exhaust Remove the screw securing the stay 2 Remove 1 screw securing the thermal protector 3 Disconnect 2 lead wires from the magnetron 4 Remove 3 screws securing the magnetron to
15. e 1 Primary Interlock Terminals COM and NO Interlock Monitor Terminals COM and NC CAUTION After checking the switches make sure that the interlock monitor switch is properly connected according to the CIRCUIT DIAGRAM on page 3 pJeoq Hno pJeoq HOI 991105ul l suny 01JUO9 BLWJON joJjuo9 85eld tj SHEHA I AS I 0 Zu I RA I c oDed oos 440 10 NO DJe0q N2119 JOMUOD uo preoq Aen pasos Panes oBeyon jddns samod 19940 Yono IEUUON Ae yono eoejdeu 9ouelsisoH suny I I Leg ODO JN ID 0 s 9 o6ed ses pJeoq fas L DISOO Ady yono AO yna 041u02 jo eoue siso1 429u25 eDe1o uoe3 I uim OOO y pJeoq nona ODO i Jo31uo2 ooe do4 000 SE pieoq WOU 10 LOLS 10 99uuoo YO sung IOJJUO9 BULON jo Buneas 1061102 oSuelsis 1 uoe3 p1eoq Ady uonol I G A l O co LA I a SHOA Ocl peog noo JOUJUOD UO LS 10 99uuoo q L r1 BulAoweas Jaye Uld pue 3180ud OZE O Uld US9MISQ S 10 199uuoo JO XA A ddns 1amod IVWAOZ 29u2 CL eBed uo ISNA 9NIAOW3H 3 998 uMotq s esnj eui JI P1009 JAMOd OY pue JABO 10J 1012910144 euJ8u1 uoneuBeul ASBSSODOU Ji JO JOJ99 01d jeuueu yu eoejdey esnj jo Ajuinunuoo WOU shay eui Bulyono Aq mopuim ejdsip ay ul e dsip siui 10 ejdsip ON Wa1T8OHd 1 L1ns3au 3ON3afno3as dailS ONILOOHS31anouHl 8 pJe0q 1In24Jl9 p4eoq noo EET INDJI In2Jl wo Speoj Gin ayy Bu Aou81 011009 JEUJON 01Ju09 eo
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17. he owner For CANADA FORM EM S100 02 05 CAUTION For microwave energy emission On every service calls check for microwave 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 275215 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 beaker and made of an electrically none conductive material such as glass or plastic The cook tray must be in place when measuring emission A properly operating door and seal assembly will normally 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 are minimal Follow the instructions supplied with a detector being used and performed an R F emission test around the door front and edges and all edges and vent of the outer case The cabinet wrapper must be in place and the oven fully assembled When performing emission survey with the meter on FAST RESPONSE the movement of a 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 the patte
18. ity or 10 meg ohms from the beginning Normal reading Indicates about the middle position in one direction forward direction and infinite ohms in the reverse direction using meter which is provided with a 9 volt battery NOTE Some digital meter may show over even in a forward direction because low measuring voltage of meter does not allow the meter current to pass through the high voltage diode Abnormal reading Indicates continuity or infinite ohms in both directions TP 1 TP 2 3 IP 4 Lad 2 15V 30V 2 0V DC DC AC COMPONENT CHECKOUT PROCEDURE RESULT Measure the resistance between terminals of MM a it f 101 FPC connector after removing it from S101 When Wan anal touched touched Less than More than 1K Ohms 1 MEG Ohm Figure 9 When checking START key connect ohm meter as illustration below Resistance value NOTE When reconnecting the FPC connector make sure the holes on the connector are properly inserted in hooks of the plastic fastener in S101 MATRIX CIRCUIT FOR TOUCH KEY BOARD FPC CONNECTOR TOUCH KEY BOARD ohm meter OQ OO O OOO gt gt gt 300 QON O O TERMINALS OF FPC CONNECTOR Figure 9 CHECKOUT PROCEDURE FOR SWITCHES Disconnect the lead wires from the switches and check for the continuity of the switches connecting an ohm meter to its terminals SWITCHES See Figure 1 on pag
19. k for microwave energy 1 REA jl leakage with a detector Microwave energy leakage must be below Os E the limit of 1mW cm at 275cc water load 5mW cm at no load d and 5mW cm at 275cc water load without the cabinet when measured with a detector For CANADA Figure 17 8 EXPLODED VIEW AND PARTS LIST CAVITY 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 AN symbol Z O Part No Description Q ty Key No Part No Description Q ty A cO OO O O G N e 617 186 2072 411 082 5201 411 160 6007 617 182 7675 411 160 6106 617 224 3467 617 150 2657 411 010 5808 617 138 5601 617 221 6096 411 011 0802 617 180 6137 411 089 2500 Cabinet SCR TPG TRS 4x10 Z1 SCR TPG TRS SRT 4x 10 Z1 Power Cord SCR S T PAN 4 x 10 Z1 Oven Cavity Not Service Part Gear Motor SCR EVR PAN 4 x 10 Z1 Bottom Plate Not Service Part Plastic Foot with Canoe Clip Bolt Hex SW W 5 x 14 Hinge Lower Washer F5 x 10 x 0 8 N M sch eck O sch 14 15 617 120 8481 617 220 5052 617 199 1048 617 215 2714 617 181 4248 617 162 1938 411 069 1707 411 006 6604 617 200 0381 617 080 5315 617 224 1081 617 224 1098
20. nsert a thin flat blade screwdriver between the choke dielectric and the door main frame and lift up the choke dielectric to release hooks one by one Figure 15 2 Remove the choke dielectric Figure 16 Door 3 To detach the door cover Insert a thin flat blade screwdriver between door cover and the door panel K REMOVING TURNTABLE MOTOR COVER and release the projections inside door cover eee Se y 4 To detach the door panel Insert a thin flat blade Figure 17 a between the door cover and door main 1 Turn over the oven on its back r i AME Hooks 2 Cut the 6 joints of the bottom plate using diagonal vu N pliers nipper 3 Separate the motor cover from bottom plate 4 Remove 2 screws securing turntable motor to the cavity and take it out al Note Bent the cut joints inside slightly for safety and Hooks bey Hooks be careful of sharp edge Motor Cover RED SEEN 6 Joints Bottom Plate Main Frame Choke Dielectric VOR a y a Ze D Moos Figure 15 elle ZE manana S SAA L9 Rt s NOTES s D The choke dielectric may be damage when it is removed a Zb When reinstalling it replace it with new ones if it is damaged 3 CS Dy AH 4 p e After installing the door in place check for microwave energy 8 CL M SURE leakage with a detector Microwave energy leakage must be below ISI Z the limit of 5mW cm2 For U S A C IO After installing the door in place chec
21. on Q ty 18 411 082 5201 SCR TPG TRS 4 x 10 Z1 2 19 617 196 8507 Blower Fan 1 20 617 124 1181 Latch Lever 1 21 617 152 4741 Micro Switch Primary Interlock 1 V 5930D 22 617 004 5575 Micro Switch Interlock Monitor 1 V 5220DZ 23 6171524741 Micro Switch Door Sensing 1 V 5930D 24 6171241198 Latch Lever 1 25 617 124 1174 Lever Stopper 1 26 411 102 5907 SCR ETG TRS 4 x 10 N2 2 27 28 617 117 3505 Harness Door Sensing 1 29 617 124 3796 Lead Wire Assy 1 30 411 160 6106 SCR S T PAN 4 x 10 Z1 1 31 411 007 5903 SCR TPG BIN 4 x 10 Z1 1 32 617 208 7689 Clip 2 DOOR PARTS NOTE All component have special characteristics for safety and must be replaced using parts listed in this manual All service on MAN ovens should be performed by a qualified technician using approved testing equipment Customers should not attempt replace component marked with a AN symbol Part No Description Q ty ipd Part No Description Q ty 1 617 208 7504 Door Cover 1 2 4111789908 SCR S TPGFLT4x8 2 3 617 208 7511 Door Panel 1 4 617 208 7481 Door Main Frame Also order 1 Door Sheet when replacing Door Main Frame 5 4110541903 Nut Hex Flg W SRT 5 2 617 180 6151 411 011 0802 617 124 0948 617 124 0931 617 101 1494 617 179 2478 Hinge Upper Bolt Hex SW W 5 x 14 Choke Dielectric Door Sheet Spring Door Latch py sch CONT
22. rn 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 ovens 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 exceed five 5 milliwatts per square centimeter at any point 5 centimeter 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 microwave ovens and the manufacturer immediately and 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 radiation If the interlock monitor switch operates properly and the door interlocks 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 Adjustment Procedures 1 SPECIICALONS uod abes dese wa deae ut ud PARE u S u dot 2
23. s OVEN 7 DISASSEMBLY INSTRUCTIONS MUST BE DISCONNECTED FROM ELECTRICAL OUTLET WHEN MAKING REPLACEMENTS REPAIRS ADJUSTMENTS AND CONTINUITY CHECKS BEFORE PROCEEDING WITH ANY REPAIR WORK AFTER DISCONNECTING WAIT AT LEAST 1 MINUTE UNTIL THE CAPACITOR IN THE HIGH VOLTAGE AREA HAS FULLY DISCHARGED WHEN REPLACING ANY DOOR MICROSWITCH REPLACE WITH THE SAME TYPE SWITCH SPECIFIED ON THE PARTS LIST B REMOVING PRIMARY INTERLOCK SWITCH AND INTERLOCK MONITOR SWITCH Figure 10 b 1 Disconnect all wire leads from primary interlock and interlock monitor switch 2 Pull the primary interlock switch or interlock monitor switch upward at the same time while pushing the switch stoppers to allow a space between the switch body and catches 3 Make necessary adjustments or replacement of switch by the reversing step 2 and check microwave energy leakage according to 1 ADJUSTMENT PROCEDURES on page 1 after it is replaced with new one and check proper operation of it according to CHECKOUT PROCEDURE FOR SWITCHES on A REMOVING DOOR SENSING SWITCH page 6 Figures 1 on page 1 10 a 1 Disconnect all wire leads from the door sensing switch Figure 1 on page 1 2 Remove 2 screws securing the lever stopper 3 Push the door sensing switch upward while pressing adjacent upper switch stopper of lever stopper and lower switch stopper down Figure 10 a 4 Then remove it by lightly pressing the switch tow
24. t up the control circuit board from its lower side and take it out from the control base REMOVING TOUCH KEY BOARD Figure 14 After removing the control circuit board 1 Remove control base while lifting it up at the right side and take it out from the control frame 2 Remove control sheet which is glued to touch key board 3 Remove the touch key board which is held on the control base bracket with the adhesive tape Control Base Control Frame Figure 13 Control Sheet Touch Key Board _ OVE Figure 14 H REMOVING DOOR J REMOVING CAVITY COVER 1 Remove 2 hex nuts securing the upper hinge Figure 16 2 Tilt the top of the door toward you 3 Lift up the door to remove it 1 Remove a screw from the cavity compartment NOTES Cavity Cover After replacing the door be sure to check that the primary interlock switch the door sensing switch and the interlock monitor switch operate normally See page 1 After replacing the door check for microwave energy leakage with a leakage detector Microwave energy leakage must be below the limit of 5mW cm2 For U S A After replacing the door check for microwave energy leakage with a leakage detecter Microwave energy leakage must be below 1 mW cm2 at 275cc water load Screw 5mW cm2 at no load and 5mW cm2 at 275cc water load without the cabinet when measured with a detector For CANADA I DISASSEMBLYING DOOR Figure 15 1 I
25. the chassis ground with an ohmmeter on high est scale Ohm meter O 1 Measure the resistance With an ohm meter on R x 1 scale a Primary winding b Filament winding c Secondary winding 2 Measure the resistance With an ohm meter on highest scale a Primary winding to ground b Filament winding to ground Figure 5 HIGH VOLTAGE TRANSFORMER Note Remove varnish of Figure 6 measured point Normal reading Less than 1 ohm Normal reading Infinite ohms Normal readings Approximately 0 32 ohms Less than 1 ohm Approximately 75 2 ohms Normal readings Infinite ohms Infinite ohms COMPONENT CHECKOUT PROCEDURE RESULT Measure the resistance Across two terminals with an ohm meter on highest scale Figure 7 HIGH VOLTAGE CAPACITOR including BLEEDER RESISTOR Measure the resistance Across two terminals with an ohm meter on R x 10 000 scale Ohm meter HIGH VOLTAGE DIODE Figure 8 Measure the voltage Between test point TP 1 TP 2 or TP 3 and Ground or between CONTROL TP 4 and TP 5 See Control Circuit Board on page 19 CIRCUIT BOARD NOTE Proceed with the check of the Step Down Transformer to see if any one of the measured values is different from the specified values Normal reading Momentarily indicates several ohms and gradually returns to 10 meg ohms Abnormal reading Indicates continu
26. the waveguide 5 Take out magnetron VERY CAREFULLY Figure 11 Top View NOTES 1 When removing the magnetron from the cavity or wave guide use a proper care so that the dome of the magnetron does not hit any adjacent parts of microwave oven 2 Make sure that the contact face of the magnetron gasket is free from any damage or deformation 3 Adjust the position of the magnetron properly so that it correctly sits in place and the magnetron gasket is in contact with the mounting rim evenly 4 While holding the magnetron under this condition SX tighten mounting screws or nuts with your fingers temporarily 5 Further tighten the screws or nuts with a box wrench giving one or two turns to each of the Screws or nuts alternatively so that the magnetron Figure 12 is mounted on to the bracket uniformly 60 After replacing the magnetron be sure to check the microwave energy leakage with a leakage detector and confirm the leakage is below 5mW cm2 For U S A 6i After replacing the magnetron be sure to check the microwave energy leakage with a leakage detector and confirm the leakage is below 1mW cm at 275cc water load 5mW cm at no load and 5mW cm at 275cc water load without the cabinet when measured with a detector For CANADA AKALIA j anono bog A E sene eoe PAS 22272 07 none Yet xiii eegen eo kt A oo YA AS aoe eeekosag TN pon eee Pret oo y gooo o WAPAA Ges L peers O pTI 09099 o Z Ae
27. unit until it is completely repaired if any of the following conditions exists Door does not close firmly against the cavity front The hinge is broken The choke dielectric or the door seal is damaged 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 Make sure that there are no defective parts in the interlock mechanism Make sure there are no defective parts in the microwave generating and transmission assembly especially waveguide The following items should be checked after the unit is repaired The interlock monitor switch is connected correctly and firmly The magnetron gasket on the magnetron is proper ly positioned Waveguide and oven cavity are intact no leakage of microwave energy The door can be properly closed and the safety switches work properly 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 5 CIRCUIT DIAGRAM 120V 60Hz E POWER CORD GROUND POWER CORD NT Or C4 o L4 L2 800 uH c1 0 1uF C2 C3 2200PF O CAVITY TEMP FUSE OPEN 1672 C CAVITY LIGHT e MAGNETRON 1 foo THERMAL PROTECTOR INTERLOCK MONITOR PRIMARY OPEN 122 5 C SWITCH gt INTERLOCK SWITCH s N NC BLOWER MOTOR NO IN GEAR MOTOR HIGH VOLTAGE TRANSFORMER RELAY 2 a
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