Service Manual
Contents
1. NOTE This oven is designed for counter top use only tt SPECIFICATIONS MODEL KOR 63D7 POWER SUPPLY 230V 50Hz SINGLE PHASE WITH GROUNDING MICROWAVE 1000W POWER GRILL CONSUMPTION COMBINATION MICROWAVE ENERGY OUTPUT 700W MICROWAVE FREQUENCV 2450MHz OUTSIDE DIMENSIONS W X H X D 465 x 279 x 342 mm 18 3 x 11 0 x 13 5 in CAVITY DIMENSIONS W X H X D 290 x 220 x 306 mm 11 4 x 8 7 x 12 0 in NET WEIGHT APPROX 13 kg 28 7 Ibs TIMER 35 min DUAL SPEED FUNCTION SELECTIONS MICROWAVE POWER SELECTIONS 7 LEVELS CAVITY VOLUME 0 7 Cu Ft SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE EXTERNAL VIEW 1 OUTER DIMENSION f 364 N p s LA 5 q a JI q If II IU L Li 2 FEATURE DIAGRAM 1 SAFETY INTERLOCK SYSTEM 2 DOORVIEWING SCREEN Allos viewing of food The screen is designed so that light can pass through but not the microwave 8 3 DOOR HOOK When the door is closed it will automatically lock shut If door is opened while oven is operating magnetron 9 7 tube will immediately stop operating 4 OVEN CAVITY 10 5 DOOR SEAL Door seal maintains the microwave within the oven cav 11 ity and prevents microwave leakage 6 GLASS COOKING TRAY Made of special heat resistant glass Food in a proper receptacle is placed on this tray for coo2. 12 INTERLOCK MECHANISM AND ADJUSTMENT The door lock mechanism is a device which has been speciallv designed to completelv eliminate microwave radiation when the door is opened during operation and thus to perfectiv prevent the danger resulting from the leakage of microwave 1 Primarv interlock switch When the door is closed the hook locks the oven door If the door is not closed properly the oven will not operate When the door is closed the hook push ji es the button of the microswitch T Then the button of the primary interlock switch bring it ja under ON condition Hook tc 4 2 Secondary interlock switch and interlock monitor switch When the door is closed the hook pushes the lock lever downward The lock lever presses the button of the interlock monitor switch to bring it under OFF sii condition and presses the button of the secondary interlock switch to bring it under ON condition Button Mounting screw Condition DOOR CLOSE Condition DOOR OPEN I ADJUSTMENT Interlock monitor switch l l a E l p When the door is closed the interlock monitor switch should be changed NO condition before other switches are closed
3. MICROWAVE RADIATION TEST AHA IA AUA AAA KAABA E KEKI KAKA BA KUUA EIA 17 3 COMPONENT TEST PROCEDURE FI ania 18 WIRING DAGAA Ma AAA lanka ka dama M MAmON maine 19 EXPLODED VIEW AND PARTS LIST a eee i eee a n a n naa n a an naa n maa maa ma maa n ana anne 20 i A DOOR ASSEMBLV ccna sta aha laaja ES E ada dan AA AAA UTA A bija ba AE A T T 20 2 CONTROL PANEL ASSEMBLY PT ET 20 3 TOTAL ASSEMBLV KI AAA AT E PETEA TAEAE t ia cea ANSA Nelan candle ajnajsieaidle N n N din ata l ajaiajein A EA T 20 SAFETV AND PRECAUTIONS 1 FOR SAFE OPERATION Damage that allows the microwave energv that cooks or heats the food to escape will result in poor cooking and mav cause serious bodilv injurv to the operator IF ANV OF THE FOLLOWING CONDITIONS EXIST OPERATOR MUST NOT USE THE APPLIANCE Oniv a trained service personnel should make repairs 1 A broken door hinge 2 A broken door viewing screen 3 A broken front panel oven cavity 4 A loosened door lock 5 A broken door lock The door gasket plate and oven cavity surface should be kept clean No grease soil or spatter should be allowed to build up on these surfaces or inside the oven DO NOT ATTEMPT TO OPERATE THIS APPLIANCE WITH THE DOOR OPEN The microwave oven has concealed switches to make sure the power is turned off when the door is opened Do not attempt to defeat them DO NOT ATTEMPT TO SERVICE THIS APPLIANCE UNTIL YOU HAVE READ THIS SERVICE MANUAL FOR SAFE SERV
4. for improving their performance without notice in the parts list So if you need the latest parts information please refer to PPL Parts Price List in Service information Center http svc dwe co kr a TE 1 To remove cabinet 1 Remove three screws on cabinet back lt uy 2 Push the cabinet backward DN a 2 To remove door assembly 1 Remove two screws which secure the stopper hinge top 2 Remove the door assembly from top plate of cavity 3 Reverse the above for reassembly I NOTE After replacing the door assembly perform a check of 1 I correct alignment with the hinge and cavity front plate l SSS o TTT TTT 3 To remove door parts REF NO PARTCODE PART NAME DESCRIPTION Q TY REMARK A01 3512203880 FRAME DOOR PP S183C 1 A02 3517007300 BARRIER SCREEN O PET T0 125 1 A03 3515204100 STOPPER HINGE T AS KOR 63150S 1 A04 3511705500 DOOR WELD ASSY KOR 61150S 1 A05 3517002800 BARRIER SCREEN l PE T0 1 1 A06 3512300200 GASKET DOOR PP 1 A07 3513100700 HOOK POM 1 A08 351501300 SPRING HOOK PW 1 1 1 Remove the gasket door from door weld as 2 Remove the door frame from door weld as 3 Remove the stopper hinge top from door weld as 4 Remove the spring and the hook 5 Remove the barrier screen outer from door frame 6 Reverse the above steps for reassembiv 4 Method to reduce the gap between the door
5. 2M214 241GP 1 F18 3516004000 SPECIAL SCREW T2 BOLT FLANGE 5X12 DACRO 1 F19 7S422X4081 SCREW SPECIAL TT2 TRS 4X8 SE MFZN 1 F20 3513003200 HOLDER HV CAPACITOR SECC T0 6 1 F21 3518302200 CAPACITOR HV 2100VAC 0 98uF 187 1 F22 3518400900 DIODE HV AS HVR 1X 30B 187 1 3518401000 DIODE HV AS ESJC13 12BX 187 1 21 v Caution In this Service Manual some parts can be changed for improving their performance without notice in the parts list So if you need the latest parts information please refer to PPL Parts Price List in Service information Center http svc dwe co kr A NO PART CODE PART NAME DESCRIPTION QTV F23 3518701100 FUSE HV 5KV 0 55A HV 41A55 02 1 F24 3518113740 TRANS HV DT N70S0 63T 1 3518113750 TRANS HV TM N70S0 63T 1 3518113760 TRANS HV TY N70S0 63T 1 F25 3516003700 SPECIAL SCREW TT3 HEX 4X8 FLG MFZN 4 F26 3510311710 BASE SECC T0 6 1 F27 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 5 F28 3512100900 FOOT PP DASF 130 2 F29 7S422X4081 SCREW SPECIAL TT2 TRS 4X8 SE MFZN 1 F30 3515201101 STOPPER HINGE U SCP 1 T2 5 1 F31 4415A17352 SE MICRO VP 533A OF SPNO 187 200G 1 F32 4415466910 SW MICRO VP 531A OF SZM V16 FA 61 1 F33 4415A17352 SW MICRO VP 533A OF SPNO 187 200G 1 F34 3513702600 LEVER LOCK POM 1 F35 3513811720 LOCK POM 1 F36 3513601600 LAMP BL 240V 25W T25 C7A H187 1 F37 3512714500 HARNESS MAIN KOR 63150S 1 F38 7121400611 SCR
6. 3 blade earthing plut and a 3 slot receptacle that will accept the plug on the appliance The marked rating of the extension cord should be equal to or greater than the electrical rating of the appliance or Do not use an extension cord uu OPERATIONS AND FUNCTIONS N 4 B o o gt N Connect the main lead to an electrical outlet After placing the food in a suitable container open the oven door and put it on the glass tray The glass tray must always be in place during cooking Close the door securely Choose cooking power level by setting V P C knob to the desired position Refer to cookbook for recommended power levels Determine cooking time Consult cookbook for recipe timing Oven light turns on and cooling fan starts to operate Microwave cooking starts You may open the door while the oven is operating As soon as the door is opened the safety mechanisms stop the generation of microwave power and the operation of cooking timer If you wish to change the time during cooking simply adjust the timer to the desired time When the timer reaches zero a bell will ring and the unit will turn off Oven light turns off If additional cooking time is needed and the door is closed the oven will automatically start when the timer is reset ie EJ NOTE 1 When setting timer for less than 2 minutes tum the timer past 2 minutes and then return to the correct timer setting 2 Var
7. EW TAPPING T2S PAN 4X6 MFZN 1 F39 3966310100 MOTOR SYNCRO 220V 2 5W GM 16 24FD12 1 3966310110 MOTOR SYNCRO 220V 2 5W M2LJ49ZT52 1 F40 3518905300 THERMOSTAT OFF 75 ON 65 H 187 NB 1 F41 3513003400 HOLDER THERMOSTAT PBT 1 F42 3516003700 SPECIAL SCREW TT3 HEX 4X8 FLG MFZN 1 F43 3511406220 COVER WAVE GUIDE PP J640A 1 F44 3517400620 COUPLER XAREC 1 F45 3514700710 ROLLER TEFLON 3 F46 3512517300 GUIDE ROLLER PP 5113MF6 A353B 1 F47 3517203600 TRAY GLASS 1 F48 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN 1 F49 3518570400 SWITCH S A RELAY DWSR 1 1 22 S M NO R63D79S001 DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA G P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC FAX 02 360 8184 TEL 02 360 8183 E mail G7FO0E web dwe co kr PRINTED DATE Nov 2000
8. ICE PROCEDURES 1 If the oven is operative prior to servicing a microwave emission check should be performed prior to servicing the oven 2 If any certified oven unit is found to servicing a microwave emission check should be performed prior to servicing the oven a inform the manufacturer importer or assembler b repair the unit at no cost to the owner c attempt to ascertain the cause of the excessive leakage d tell the owner of the unit not to use the unit until the oven has been brought into compliance 3 If the oven operates with the door open the service person should tell the user not to operate the oven and contact the manufacturer and CDRH immediately A ti IMPORTANT The wire in this mains lead coloured in accordance with the following code Green and vellow Each Blue Neutral Brown Live As the colours of the wires in the manins lead of this appliance mav not correspond with the coloured markings identifving the terminals in vour plug proceed as follows The wire which is coloured green and vellow must be connected to the terminal in the plug which is marked with the letter E earth symbol or coloured green and vellow The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red Lt Wa
9. S M No R63D79S001 Service Manual Microwave Oven Model KOR 63D79S KOR 63D70S Y Caution In this Manual some parts can be changed for improving their performance without notice in the parts list So if you need the latest parts information please refer to PPL Parts Price List in Service Information Center http svc dwe co kr DAEWOO ELECTRONICS Cell LID s ee eee eee ele eee ele eee eee A A 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 micro wave 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 c Before turning on power to the microwave oven for any service test or inspection within the microwave gen erating compartments check the magnetron wave guide or transmission line and cavity for proper align ment integrity and connections d Any defective or misadjusted components in the interlock monitor door seal and microwave generati
10. TON SWP DIA 0 7 1 B12 3516906940 BUTTON DOOR OPEN ABS SG 0760 SG 175 1 1 Remove the screw which secure the control panel push up two snap fits and draw forward the control panel assembly 2 Remove the door open lever from the control panel Remove four screws which secure the timer assembly Remove the timer assembly Pull out the timer knob from the timer Remove the screw which secure the V P C coupler Pull out the V P C coupler V P C knob and flat spring from the control panel Remove door open button and button spring from the control panel 3 4 5 6 Pull out the timer coupler from the timer 7 8 9 10 Reverse the above steps for reassembly 10 1 Remove the screw which secure the control panel push up two snap fits and draw forward the control panel assembiv 2 Remove the door open lever from the control panel 3 Remove two screws which secure the timer assembiv 4 Remove the timer assembiv 5 Pull out the timer knob from the timer 6 Pull out the timer coupler from the timer 7 Remove the screw which secure the V P C coupler 8 Pull out the V P C coupler V P C knob and flat spring from the control panel 9 Remove the door open button and button spring from the control panel 10 Reverse the above steps for reassembiv 6 To remove high voltage capacitor N 1 Remove a screw which secure the grounding ring terminal of the H V diode and the capacitor holder 2 Remove
11. contact with door partiallv open until monitor switch contact son continuitv Disconnect one side of the Normal lead wire connected from transformer to the high voltage capacitor and operate oven Fuse again Continuitv gt Replace primary secondary interlock switch and interlock monitor switch Replace primary secondary interlock switch and interlock monitor switch Replace high voltage capacitor If outlet has proper voltage check continuitv of power supplv cord NO Continuitv Replace high voltage transformer Replace power supply cord 14 Does the fan motor work when vou shut the door and turn the timer2 Es Does the oven lamp light Does the turntable turn YES v If microwave do not oscillate check continuity of filament of magnetron Poor continuity v NO Normal reading should be approx 00 NO Continuity 11 Check the isolation of filament winding of high voltage transformer Check continuity filament tap 3 3V of high voltage Replace or repair oven lamp turntable motor No Continuity gt Replace high Voltage transformer Continuity Continuity in IEIR the reverse Check continuity direction Replace high filament tap 3 3V of hi
12. ge Using low voltage will cause slow cooking We are not responsible for damage resulting from use of this oven with a voltage of ampere fuse other than those specified e This appliance is supplied with cable of special type which if damaged must be repaired with cable of same type Such a cable can be purchased from DAEWOO and must be installed by a Qualified Person 6 Examine the oven after unpacking for any damage such as A misaligned door broken door or a dent in cavity If any of the above are visible DO NOT INSTALL and notify dealer immediately 7 Do not operate the oven if it is colder than room temperature This may occur during delivery in cold weather Allow the oven to become room temperature before operating EARTHING INSTRUCTIONS This appliance must be earthed In the event of an electrical short circuit earthing reduces the risk of the electric shock by providing an escape wire for the electric current This appliance is equipped with a cord having a earth ing plug The plug must be plugged into an outlet that is properly installed and earthed TA EE ii al WARNING Improper use of the earthing plug can result in a risk of electric shock Consult a qualified electrician or service man if the earthing instructions are not completely understood or if doubt exists as to whether the appliance is properly earthed and either If it is necessary to use an extension cord use only a 3 wire extension cord that has a
13. gh voltage Continuitv Voltage transformer Meter with 6V or higher voltage batteries should be used to check the normal direction resistance of the diode NO Continuitv gt Replace magnetron Replace high voltage Good transformer gt Replace magnetron 15 MEASUREMENT AND TEST 1 MEASUREMENT OF THE MICROWAVE POWER OUTPUT Microwave output power can be checked by indirectly measuring the temperature rise of a certain amount of water exposed to the microwave as directed below PROCEDURE 1 Microwave power output measurement is made with the microwave oven supplied at rated voltage and operated at its maximum microwave power setting with a load of 1000 5cc of potable water 2 The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approxi mately 190 mm 3 The oven and the empty vessel are at ambient temperature prior to the start of the test The initial temperature of the water is 10 2 C 50 3 6 F It is measured immediately before the water is added to the vessel After addition of the water to the vessel the load is immediately placed on the center of the shelf which is in the lowest normal position Microwave power is switched on 5 Heating time should be exactly A seconds Refer to table as following Heating time is measured while
14. ious clicking noises mav be heard when turning V P C knob This is normal and does not affect the operation of your microwave oven e e e e Aa aa m m e m m m m m m m m m m m m Make sure the oven is properly installed and plugged into the electrical outlet l Lt Variable power cooking ON and OFF cycle time of mechanical V P C switch is 30 seconds When the V P C knob is set to the desired position and timer knob to the desired position the V P C switch has a cycle ON OFF time sec listed below Variable power setting Approximate Percentage Power level Symbol KOR 63D7 of Power HIGH MAX 100 MED HIGH 660W 88 MEDIUM 550W 73 LOW STAGE 400W 59 DEFROST XXb 17 HEAT SZ 26 GENTLE HEATING 18 DISASSEMBLV AND ASSEMBLV Cautions to be observed when trouble shooting Unlike manv other appliances the microwave oven is high voltage high current equipment It is completely safe during normal operation However carelessness in servicing the oven can result in an electric shock or possible danger from a short circuit You are asked to observe the following precautions carefully 1 Always remove the power plug from the outlet before servicing 2 Use an insulated screwdriver and ware rubber gloves when servicing the high voltage side 3 Discharge the high voltage capacitor before touching any oven components or wiring 1 Check the grounding Do not operate on a two
15. king ROLLER GUIDE This must always be used for cooking together with the glass cooking tray COUPLER This fits over the shaft in the center of the ovens cavity floor This is to remain in the oven for all cooking KNOB V P C Used in setting cooking time for all functions KNOB TIMER Used in setting cooking time for all functions DOOR RELEASE BUTTON By pushing this button the latch system cut off all cir cuits and stops the oven before the door is opened INSTALLATION 1 Steady flat location This microwave oven should be set on a steady flat surface 2 Leave space behind and side All air vents should be kept a clearance If all vents are covered during operation the oven may be overheated and eventually cause oven failure 3 Away from radio and TV sets Poor television reception and radio interference may result if the oven is located close to a TV radio antenna or feeder and so on 4 Away from heating appliances and water taps Keep the oven away from hot air steam or splash when choosing a place to position it or the insulation might be adversely affected and breakdowns occur 5 Power supply e Check your local power source This microwave oven requires a current of approximately 6 amperes 230 Volts 50 Hz e Power supply cord is about 0 8 meters long e The voltage used must be the same as specified on this oven Using a higher voltage may result in a fire or other accident causing oven dama
16. l When the door is opened the interlock monitor switch should be changed NC condition after other switches are opened l J H ee 3 Adjustment steps 1 Loosen the two mounting screws 2 Adjust interlock switch assembly position 3 Make sure that lock lever moves smoothly after adjustment is completed 4 Tighten completely two mounting screws a NE I NOTE l Microwave emission test should be performed after adjusting interlock mechanism l If the microwave smission exceed 4mW cm2 readjust interlock mechanism l l l l EES 13 TROUBLE SHOOTING GUIDE Following the procedure below to check if the oven is defective or not 1 Check grounding before trouble checking 2 Be careful of the high voltage circuit 3 Discharge the high voltage capacitor 4 When checking the continuitv of the switches fuse or high voltage transformer disconnect one lead wire from these parts and check continuitv with the AC plug removed To do otherwise mav result in a false reading or damage to vour meter TROUBLE 1 Door shut timer set but no cooking takes place Does the fan motor work when vou shut the door and turn the timer2 VES Refer to next page NO Does the YES fuse blow NO v Check continuity of interlock monitor switch with door shut no Continuitv Replace fuse and check NO continuitv of both interlock switch s contact and monitor switch s
17. nd at the base of the cone does not get closer than 2 in from any metal If it does not erroneous reading may result 17 3 COMPONENT TEST PROCEDURE e High voltage is present at the high voltage terminal of the high voltage transformer during any cooking cycle e It is neither necessary nor advisable to attempt measurement of the high voltage e Before touching any oven components or wiring always unplug the oven from its power source and discharge the capacitor 1 High voltage transformer 1 Remove connections from the transformer terminals and check continuity 2 Normal readings should be as follows Secondary winding Approx 1100241096 Filament winding Approx 0Q Primary winding LL nn Approx 19 2 High voltage capacitor 1 Check continuity of capacitor with meter on the highest OHM scale 2 A normal capacitor will show continuity for a short time and then indicate 10MQ once the capacitor is charged 3 A shorted capacitor will show continuous continuity 4 An open capacitor will show constant 10MQ 5 Resistance between each terminal and chassis should be infinite 3 High voltage diode 1 lsolate the diode from the circuit by disconnecting the leads 2 With the ohmmeter set on the highest resistance scale measure the resistance across the diode terminals Reverse the meter leads and again observe the resistance reading Meter with 6V 9V or higher voltage batteries sh
18. not to place the eyes in direct line with the source of microwave energy Slowly approach the unit under test until the radiometer reads an appreciable microwave leakage from the unit under Ls Ct PROCEDURES Prepare Microwave Energy Survey Meter 600cc glass beaker and glass thermometer 100 C 212 F 2 Pour 275cc 15cc of tap water initially at 20 5 C 68 9 F in the 600cc glass beaker with an inside diameter of approx 95mm 3 5in 3 Place it at the center of the tray and set it in a cavity IN Close the door and operate the oven 5 Measure the leakage by using Microwave Energy Survey Meter with dual ranges set to 2450MHz 1 Measured radiation leakage must not exceed the value prescribed below Leakage for a fully assembled oven with door normally closed must be less than 4mW cm2 2 When measuring the leakage always use the 5cm 2in space cone with probe Hold the probe perpendicular to the cabinet and door Place the space cone of the probe on the door cabinet door seem door viewing screen the exhaust air vents and the suction air vents 3 Measuring should be in a counter clockwise direction at a rate of 1 in sec If the leakage of the cabinet door seem is unknown move the probe more slowly 4 When measuring near a corner of the door keep the probe N a SS perpendicular to the areas making sure the probe e
19. o Disassembly and assembly 3 TOTAL ASSEMBLY 20 V Caution In this Service Manual some parts can be changed for improving their performance without notice in the parts list So if you need the latest parts information please refer to PPL Parts Price List in Service information Center http svc dwe co kr A NO PART CODE PART NAME DESCRIPTION Q TY A00 3511714420 DOOR AS KOR 63D59A 1 Boo 3516720620 CONTROL PANEL AS KOR 63D79S 1 FO1 8510805000 CABINET SECC T0 5 1 F02 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 3 FO3 3516109000 CAVITY WELD AS CAVITY WELD AS 1 3516109640 CAVITY JOINT AS KOR 63D59A 1 FO4 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 1 F05 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN 1 F06 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN 1 F07 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 2 F08 35113AEQ0D CORD POWER AS 3X0 75 70X70 100 RTML 1 F09 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 1 F10 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN 1 F11 4415D67620 FUSE 250V 12A 65TS 1 4415D67120 FUSE 250V 12A MDA 1 F12 3518606200 NOISE FILTER DWLF M12 1 F13 7121403011 SCREW TAPPING T2S PAN 4X30 MFZN 2 F14 3963513100 MOTOR SHADED POLE 230V 17W OEM 10DWC2 A07 1 3963512310 MOTOR SHADED POLE 230V 20W MW10CA M02 1 F15 3512517000 GUIDE WIND PP 1 F16 3511800300 FAN PP 30 GLASS 1 F17 3518002200 MAGNETRON 2M218H MF 1 3518003300 MAGNETRON
20. on and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the owner e A microwave leakage check to verify compliance with the Federal performance standard should be per formed on each oven prior to release to the owner ele eee eee eee SSS SSS eee eee eee eee EEI eee el ele ele a EE EE EE EE EE EE EE EE EE EE EE EE EA EEA eee eee eee E HEEEEEEETEEI ET EE EE ele elle TABLE OF CONTENTS SAFETY AND PRECAUTIONS mi 2 1 FOR SAFE OPERATION TON 2 2 FOR SAFE SERVICE PROCEDURES WE AA AAPA MA E AR Wai TSA AA UU l E S EAE CA KI WA WA EET ETT 2 SPECIFICATIONS EKTERNAL VIEW 1 OUTER DIMENSION KOR 63D7 AN E MA A E Nana sata WAP TA WA PITA WA KAA IA WA WA AA UA WA T TTE E UTU 4 2 FEATURE DIAGRAM mimi cert taataan tees ties nannaa ekan nan naan nannaa ena nn nan annan naa aan naa a nan nannamamma 4 INSTALLATION suossa maa va KA 5 OPERATIONS AND FUNCTIONS 200202 m amaan aaa naam anata ununun KAA KAA A NWAKA NA nanana nanmanna nnana anena a 6 DISASSEMBLY AND ASSEMBLY Hii kikanisa ano asana atamaani 7 INTERLOCK MECHANISM AND ADJUSTMENT mamaaa aaa aa aaa aaa aaa aaa maana aa waa an aaa an WANA na Kaa WAKA Naama nanma manaa 13 TROUBLE SHOOTING GUIDE iii AWA ana 14 MEASUREMENT AND TEST 1 MEASUREMENT OF THE MICROWAVE POWER OUTPUT ll emm emeenennznnznnnznnnrarenznnarnnznnnnnznn nanna naza 16 2
21. ould be used to check the front back resistance of the diode oth erwise an infinite resistance may be read in both directions A normal diode s resistance will be infinite in one direction and several hundred KQ in the other direction 4 Magnetron For complete magnetron diagnosis refer to Measurement of the Microwave Power Output Continuity checks can only indicate and open filament or a shorted magnetron To diagnose for an open filament or a shorted magnetron 1 Isolate magnetron from the circuit by disconnecting the leads 2 A continuity check across magnetron filament terminals should indicate 0 19 or less 3 A continuity check between each filament terminal and magnetron case should read open 5 Fuse If the fuse in the primary and monitor switch circuit is blown when the door is opened check the primary and monitor switch before replacing the blown fuse In case the fuse is blown by an improper switch operation replace the defective switch and fuse at the same time Replace just the fuse if the switches operate normally 18 WIRING DIAGRAM HIMO MOQ 4404 TREN TSA MON mm N EE G A ANE l MOTT MTSE m WE PW E Wa P Mw TE a L WA TIT M IM KLS TOHIN LID H ET enn ue gry aaa any LW hd TIKE 7 10 10 Y WHI Ld KIMO 19 EXPLODED VIEW AND PARTS LIST 1 DOOR ASSEMBLY Refer to Disassembly and assembly 2 CONTROL PANEL ASSEMBLY Refer t
22. seal and the oven front surface 1 To reduce gap located on part A Loosen a screws on stopper hinge top and then push the door to contact the door seal to oven front surface Tighten two screws 2 To reduce gap located on part B Loosen two screws on stopper hinge under and then push the door to contact the door seal to oven front surface Tighten two screws l 0 qx NOTE A small gap may be acceptable if the microwave leakage does not exceed 4mW cm2 Lt VY Caution In this Service Manual some parts can be changed for improving their performance without notice in the parts list So if you need the latest parts information please refer to PPL Parts Price List in Service information Center http svc dwe co kr 5 To remove control panel parts REF NO PART CODE PART NAME DESCRIPTION QTY REMARK B01 3513405500 KNOB VPC ABS XR 401 H 2938 1 B02 3516725310 CONTROL PANEL ABS VT 0826 AF 348 1 B03 351501600 SPRING FLAT SUS 301 T0 5 1 B04 3517400500 COUPLER VPC KNOB POM 1 B05 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN 1 B06 3517400400 COUPLER TIMER POM 1 B07 3518204300 TIMER KN35MKD 15U P 1 B08 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN 2 B09 3513405410 KNOB ABS XR 401 H 2938 1 B10 3513702710 LEVER DOOR OPEN PP 1 B11 441G430171 SPRING BUT
23. the H V diode from the capacitor holder 3 Reverse the above steps for reassembly High voltage circuit wiring 7 To remove magnetron 1 Remove a screw which secure the magnetron 2 Remove the magnetron 3 Reverse the above steps for reassembly 11 Wa AA e e e e e e e e e e e e e e e m e m m e m e m m m m m m m m m m NOTE Never install the magnetron without the metallic gasket plate which is packed with each magnetron to pre I I vent microwave leakage Whenever repair work is carried out on magnetron check the microwave leakage It shall 1 I not exceed 4mW cm2 for a fully assembled oven with door normally closed l A Wave guide Magnetron antenna en lt MAGNETRON gt Metallic gasket plate Metallic Magnetron antenna Cooling fin Filament terminal 8 To remove wind guide assembly 1 Remove a screw for earthing 2 Remove the noise filter from the wind guide 3 Remove a screw which secure the wind guide assembly 4 Draw forward the wind guide assembly 5 Pull the fan from the motor shaft 6 Remove two screws which secure the motor shaded pole 7 Remove the motor shaded pole 8 Reverse the above steps for reassembly 9 To remove H V transformer 1 Remove four screws holding the H V transformer 2 Remove the H V transformer 3 Reverse the above steps for reassembly
24. the microwave generator is operating at full power The filament heat up time for magnetron is not included 6 The initial and final temperature of water is selected so that the maximum difference between the ambient and final water temperature is 5K 7 The microwave power output P in watts is calculated from the following formula A P 4187 X AT t e AT is difference between initial and ending temperature e It is the heating time The power measured should be B Refer to SPECIFICATIONS W 10 0 i TT TT ER SAC TS O i STE TT STI I CAUTION l 1 Water load should be measured exactiv to 1 liters l 2 Input power voltage should be exactiv specified voltage Refer to SPECIFICATIONS l 3 Ambient temperature should be 2042 C 6813 6 F l ONE mai ea Ga tata Ga ta tal taa Ga taa mal Gm Gen tea dem Qam mel m Gmt tm mma AA taa mal Gma mai sma ema mall Heating time for power output A second 70 64 60 56 52 49 47 44 42 40 38 B W 600 650 700 750 800 850 900 950 1000 1050 1100 16 2 MICROWAVE RADIATION TEST al WARNING the test Make sure to check the microwave leakage before and after repair of adjustment Always start measuring of an unknown field to assure safety for operating personnel from microwave energy Do not place vour hands into anv suspected microwave radiation field unless the safe densitv level is known Care should be taken
25. wire extension cord The microwave oven is designed to be used while earthed It is imperative therefore to make sure it is earthed properly before beginning repair work 2 Warning about the electric charge in the high voltage capacitor For about 30 seconds after the operation stopped and electric charge remains in the high voltage capacitor When replacing or checking parts short between oven chassis and the negative high terminal of the high voltage capacitor by using a properly insulated screwdriver to discharge 4 When the 15A fuse is blown out due to the operation of the monitor switch replace primary interlock switch secondary interlock switch and interlock monitor switch 5 After repair or replacement of parts make sure that the screws are properly tightened and all electrical connections are tightened 6 Do not operate without cabinet Wa AA AA e e e e e m e m e m m e m m m m m m m m m m m m I CAUTION Service personnel should remove their watches whenever working close to or replacing the magnetron I Wa AA e e e e e e e e e e m m e m e m e m m e m m m m m m m m m m m m WARNING When servicing the appliance need a care of touching or replacing high potential parts because of I electrical shock or exposing microwave These parts are as follows HV Transformer Magnetron HV Capacitor HV Diode HV fuse l I l l Ls LTT v Caution In this Service Manual some parts can be changed
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