Service Manual
Contents
1. Fig 1 Front view Fig 2 Side view 3 2 FEATURE DIAGRAM ON E W 11 12 Door When the door is closed it will automatically shut If the door is opened while the oven is operating the magnetron will immediately stop operating Door viewing screen Allows viewing of food The screen is designed so that light can pass through but not the microwave Metal rack Top heater Turns on when convection grill and combi cooking is selected Oven lamp Automatically turns on during oven operating Safety interlock system Control panel Turntable tray Rotates during cooking and ensure even distribution of Microwaves It can also be used as a cooking utensil Roller guide This must always be used for cooking together with the turntable tray 10 Coupler This fits over the shaft in the center of the ovens cavity floor This is to remain in the oven for all cooking Convection outlet amp fan Under heater 13 14 Oven front plate Door seal Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage 4 INSTALLATION N Co o N Steady flat location This microwave oven should be set on a steady flat surface This microwave oven is designed for counter top use only Leave space behind and side2. REF NO PART CODE PART NAME DESCRIPTION EU REMARK 1 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 1 2 3511407300 COVER MOTOR B SBHG T0 6 1 3 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 2 4 3511407400 COVER B SBHG T0 6 1 5 3512766900 HARNESS CONVECTION B KOC 1BOK0S 1 6 3512803800 HEATER MIRACLON 115V 550W 270MM 2 7 3511407700 COVER HEATER B SA1D T0 5 1 8 7113400814 SCREW TAPPING T1 BIN 4X8 MFNI 3 9 740010401 1 WASHER PLAIN PW 1 4 MFNI 1 10 3511800700 FAN CONVECTION SA1D T0 5 1 11 7S627W50X1 NUT HEX NUT FLANGE M5X0 8P MFZN 1 12 3512766800 HARNESS CONVECTION A 1 5 1 13 7601400811 SCREW MACHINE PAN 4X8 PW MFZN 2 14 3513302900 INSULATOR HEATER B SA1D T0 5 1 15 7113400814 SCREW TAPPING T1 BIN 4X8 MFNI 4 16 3963514300 MOTOR SHADED POLE 230V 50Hz MW10CA T02 1 17 3511800800 FAN PP GF20 1 18 7402704600 RING C CR 5 SK5 1 1 Remove a screw 1 and then pull out Cover motor b 2 2 Remove two screws 3 and thenpull out Cover b 4 3 Pull out the Harness convection b 5 4 Remove four screws 49 and then pull out the Rear heater assembly 5 Remove Nut and then pull out the Fan convection and Washer plain 9 7 Pull out two Heaters 6ffrom the the Insulator heater b44 8 Remove two screws 3and then separate the Insulator heater b and Motor shaded pole 6 9 1 15 Remove the and then pull out the Fan from Motor shaft Reverse the above steps for reassembly
3. HOLMS 0 TUALNI AUN ONOO3S P lt b QN n0 o S 8338 901 i 8338 430NN 1 1 10 100 TWARGHL 3514 ON HO H HOLMS YOLINON X00 usadn HoLNS VOORIN ASSY BET AM Hd JINIS 5 UM0d 28 11 EXPLODED VIEW AND 5 LIST 11 1 DOOR ASSEMBLY Refer to 6 Disassembly and assembly 11 2 CONTROL PANEL ASSEMBLY Refer to 6 Disassembly and assembly 11 3 TOTAL ASSEMBLY Es 29 N N D A B TN Ro yo y 29 NO PART CORD PART NAME DESCRIPTION Q TY A00 3511714000 DOOR AS KOC 1BOKOS 1 3516724900 GONTROLPANELAS ne eme nomen mem forewarn sai s bows 1 Euro ne SS Ci Sms NN m pont xta en 1 memi Rmenenm 1_ al meron Romero ns peers env maar s oronsmeno vaikas f f Ana a An EA re Ses EDT 3513702100 LEVERSWMIGRO KoGeseros 1 za 2
4. TROUBLE 4 Grill heater upper heater is not heated food will not become hot CONDITION CHECK RESULT CAUSE REMEDY E Check continuity of No Malfunction of Adjust or cuisse E primary interlock switch pm continuity primary Interlock replace not heated switch mm i m gt Adjust or Check continuity of Malfunction of secondary interlock switch continuity secondary replace interlock switch Check continuity of No Replace heater continuity gt Defective heater Check D C voltage DL oV m Defective touch gt Replace being supplied to control circuit RELAY RY2 coil gt Approx gt Faulty contacts of Replace 24V DC RELAY RY2 or open relay coil TROUBLE 5 1 Convection heater is not heated food will not become hot 2 Convection fan motor does no rotate CONDITION CHECK RESULT CAUSE REMEDY Malfunction of Adjust or 1 Convection gt Check continuity of ST N eos heater is not primary interlock switch continuity primary Interlock replace heated switch 2 Convection fan and Check continuity of No Malfunction of Adjust or motor does secondary interlock continuity i secondary replace not rotate switch interlock switch Check continuity of No I Replace gt v n L gt Def 2 heater motor continuity Check D C voltage gt OV m Defective touch Replace being supplied to control circuit RELAY RY3 RY6 coil gt Approx gt Faulty contacts of
5. DIODE SWITCHING 16 DIODERECTIFYING Di8 Dz3 1N4004A AUTO Samm 02 40 6 s DIODE ZENER pos PZUZsReSSB T UZsses DAUSREESS 1 _ 20 DIODE ZENER UZ 13BSA DZUZ13BSA 1 toemon o6 S DHS z RESISTOR RLRARI RBRTM 16W10KOhm5 RDAZIO3J 6 25 RESISTOR RAR amp RISR2 4 few 200 mg t RESISTOR 1 6W 1M Ohm 595 RD AZ105J RESISTOR T 1 RESISTOR 1 4W 301K Ohm 196 RN 4Z3013F 1 RESISTOR ARRAY 7P 6 1 8 100K 5 5 4 1 8 100K 5 5600014 3 SW RELAY paar TRANSISTOR KTA1266Y AUTO TZTA1266Y Lis TRANSSTOR os 4GiEGIS KTOSISEGR AUTO 1 46 TRANSISTOR T 47 TRANSISTOR osano 8 49 THERMISTOR 3514801400 RESISTOR R103 R104 1 6W 10K Ohm 5 RD AZ103J 53 SW ROTARY EN101 SDB161PVB17F 1 2 5810109002 1 38
6. 4589 E leg ems sg OL INS a gt i lanoo NOUO 1504430 Meu 3ANOO inv Is lee 590105 6015 597015 60 ei BELTNL BHLHNI BELENL SrLENL 04 204 co 904 co 908 104 MO cud auos P 109 op u0 o ZLSWZO WNH NOULIDIC 140 1353 S WA GC PA 9 40d G d Sp ld vy Sid y Fld t Tid Oy Mox ux SSAV 29 55A ZE 1521 16 aazzna 30d IA awe vx 10Z 29 MT GOZ 77 ZL ESTC P AOS iD L AOS 201 400 VEOOINL 27022 610 God YA VPOOVNL S401Z uNd T 810 M L TTH Na 1601 10 PER d 8I f f we HL eu ru noi 702 aes 23 lt E L pA AGE 310001 VAVYOOHNI f 993 00 A n p D A V M 002 1 41 gp 4 4 4 eum 0120 189 NO N EN
7. 3 One or more digits in the display are not on when they should be VN VN V D 4 Display does not count down or up with time cooking or clock operation m P 5 5 Oven is programmable and cooks normally but no display shows 9 M S BM 2 46 6 Display obviously jumps in time while counting down 7 Display counts down noticeably too fast while cooking 8 Display does not show the time of day when clear button is touched 9 Oven lamp and turn table motor do not stop although cooking is finished Check if the RELAY RY4 contacts close and if they are close replace touch control circuit CONDITION CHECK RESULT CAUSE REMEDY Display does Check each button for Normal gt Malfunction of Replace not show continuity of the button touch control control box programming circuit of control sub assembly at all even if box sub assembly keyboard is touched 22 TROUBLE 8 When ERROR 2 ERROR 3 come on display CONDITION ERROR 3 come on display ERROR 2 8 RESULT CAUSE REMEDY Check continuity of thermistor 00 or infinite Replace Replace resistance of thermistor Approx L 200k 300k0 room temperature i Check continuity of heater oe Replace convection upper lower So
8. e eeu UE 3 S EXTERNAL VIEW ette oe en ea i a ae 3 Sd OUTER DIMEN SION gt gt gt gt gt gt gt gt gt e nid 3 3 2 FEATURE DIAGHAM e epe eo a 4 d INSTALLATION es S nets ee cee nets i ai aaa eb pue up ede 5 5S CONTROL PANEL Susie ni lint stile teo Lus 6 6 DISASSEMBLY AND ASSEMBLY gt gt gt u u u is 7 7 INTERLOCK MECHANISM AND ADJUSTMENT 17 TROUBLE SHOOTING GUIDE scent Lenas ie Kaki saaa 18 9 MEASUREMENT AND TEST ais Ua 24 9 1 MEASUREMENT OF THE MICROWAVE OUTPUT 24 MICROWAVE RADIATION TE ST Pere ae pee eee 25 925 COMPONENT TEST PROCEDURE 2 2 u ul u eee ete 26 4 COMPONENT UAC TION i Ai 27 WIRING DIAGRAM ce etsean u E a a a 28 11 EXPLODED VIEW AND PARTS LIST z u u 29 tis DOOR ASSEMBLO gt gt bs cede is ua e pte gt gt gt 29 11 2 CONTROL PANEL ASSEMBLY ordner Ide eee i 29 TOTAL ASSEMBEY UIROS gt gt gt gt gt 29 12 PRINTED CIRCUIT BOAR eee 33 13 P C B CIRCUIT Ne WE ne ne ne nennen nennt nn nn nn nnnc 37 1 SAFETY AND PRECAUTIONS 1 For S
9. Pol sunan pow f LEM 3512717700 HARNESSMAN KOG4BOKOS a F32 75627W50x1 NUTHEX NUTFLANGEMSXDSPMEZN 1 3511600700 FANCONVECTON aps 1 30 PART CORD PART NAME DESCRIPTION Q TY NO 2 2 2 FS7 a5118A50J5 CORD POWERAS 120 RTML 1 4M 4 2 1 1 2 1 31 NO PARTCORD PARTNAME DESCRIPTION QT ro _sswowo pneum i _ 3512767000 HARNESSHEATER KOG 1B0KOS 1 LETS 3517207300 TRAYRAGKAS 1 F76 3517207310 TRAYRAGKAS 1 1 LETT 3517207200 TRAYMETAL sPPTOG Ja 81 740704600 oc 1085989 32 12 PRINTED CIRCUIT BOARD L CIRCUIT CHECK PROCEDURE 1 Low voltage transformer check The low voltage transformer is located on the P C B Measuring condition Input voltage 230 V Frequency 50Hz AC 17 0V AC 19 9V 8 9 AC 1 3V AC 1 6V AC 1 3V AC 1 6V 7 2 8 2 10 NOTE1 Secondary side voltage of the low voltage transformer changes in proportion to fluctuation of power source voltage NOTE 2 The allowable tolerance of the secondary voltage is within 590 of nominal voltage 2 Voltage Check Key check point No CHECK POINT REMARK IC1 PIN 63 64 5VDC 596 PIN 38 2 20 ms 50Hz IC1 PIN 33 or 34 3 T 250 ns 4MHz Check method MEASURE POINT WAVE FORM REMEDY REMARK
10. All air vents should be kept a clearance If all vents are covered during operation the oven may overheat and eventually cause failure 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 Position the oven as far from them as possible 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 Power supply Check your local power source This microwave oven requires a current of approximately 12 8 amperes 230 Volts 50 Hz Power supply cord is about 1 2 meters long 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 damage 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 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 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 Do not o
11. Approx 1009 10 Filament winding Approx 09 Primary winding Approx 1 2 Q High voltage capacitor A Check continuity of capacitor with meter on the highest OHM scale B A normal capacitor will show continuity for a short time and then indicate 10MW once the capacitor charged C A shorted capacitor will show continuous continuity D An open capacitor will show constant 10MQ E Resistance between each terminal and chassis should be infinite 3 High voltage diode A Isolate the diode from the circuit by disconnecting the leads B 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 500V dc or higher voltage batteries should be used to check the front back resistance of the diode otherwise an infinite resistance may be read in both directions A normal diode s resistance will be infinite in one direction and several hundred in the other direction 4 Magnetron For complete magnetron diagnosis refer to Measurement of the Microwave Output Power Continuity checks can only indicate and open filament or a shorted magnetron To diagnose for an open filament or a shorted magnetron A Isolate magnetron from the circuit by disconnecting the leads B A continuity check across magnetron filament terminals should indicate 0 10 or less C A continuity check between each filament termin
12. i LSND 40 1002 618 u9B6160 SLO Le 6 0 ZNO 21021 cla o MOBGLEO OLeo ziese ccd 9 a 60 sili fe l a 0190829 10 1 9689 010 am e 14 1989 CAM e 3 a A 0 LAM poa 904 g um J SAN gp pa not 2 Wwzl 5S 00 GAM e 8 MWII SS 00 Za We d NWT et 2101 W LLY ALOE 350610 old Nr LXO 8dAL 121 LY 20 YOLSINYSHL 37 ASS Y PART LIST a TTT s BUzzER a ema 3516010 CAPACITOR CERAMIC C3 C6 C11 104 50V Z AXIAL CCZF1H104Z FS GWPROTORCERAMIC oats WRESOVZAL 2 CAPACITOR ELECTRO ECT BUVRS1uF T s CAPACITOR ELECTRO T OWOORELECTRO 805 35313 0210 30166M7020 CONNECTOR WAFER ssara oeto
13. 33 3 Case of no microwave oscillation 1 When touching M W button oven lamp turns on and Fan motor and turntable rotate and cook indicator in display comes on Cause RELAY 1 does not operate J a RY1 G56 1A DT 24V Q5 Check method STATE POINT A POINT B RELAY1 ON 5V DC GND RELAY1 OFF GND 24V DC 2 When touching M W button oven lamp does not turn on and turntable motor does not rotate but cook indicator in display comes on Cause RELAY 4 does not operate o 0 LAMP E TRAY 9 RY4 oj ss 124M 22 Check method STATE POINT A POINT B GND RELAY4 OFF GND 24V DC 3 When touching M W button oven lamp turns on and fan motor does not rotate but cook indicator in display comes on Cause RELAY 5 does not operate 1N4148 RY5 0J ss 1241M 2 Q9 Check method STATE POINT A POINT B RELAY5 ON 45V DC GND 34 4 Case of heating of upper grill When touching GRILL1 amp COMBI button oven lamp turns on and fan motor and turntable motor rotate and cook indicator in the display comes on Cause RELAY 2 does not operate 0 41 o UPPER D10 GRILL Oo 1N4148 RY2 G56 1A DT 24V STATE POINT A POINT B RELAY2 ON 5V DC GND RELAY2 OFF GND 24V DC 5 Case of no heating of lower grill When touching GRILL2 amp COMBI button oven
14. 1 2 3 4 5 6 Remove three screws 8and then separate the Cover heater b 7 and the Insulator heater b 4 7 8 9 10 13 remove Motor synchro And Under heater assembly parts 4 5 6 Remove a screw6 Pull out the Heater u from the Cover heater Reverse the above steps for reassembly wae 16 CUTTING 6EA PART CODE PART NAME DESCRIPTION Q TY 1 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 1 2 3511407500 COVER HEATER U 515430 T0 5 1 3 3515304000 SUPPORTER HEATER U 515430 5 1 4 3512802000 HEATER U 230V 400W R18374001 1 5 7113400814 SCREW TAPPING T1 BIN 4X8 MFZN 1 1 Cut the Motor synchro Cover parts from the base plate 2 Remove a screw and then pull out Motor synchro 3 Remove a screw and then pull out the Under heater assembly 7 INTERLOCK MECHANISM AND ADJUSTMENT The door lock mechanism is a device which has been specially designed to completely eliminate microwave radiation when the door is opened during operati
15. Replace 24V DC RELAY RY3 RY6 or open relay coil 21 TROUBLE 6 Lower heater is not heated food will not become hot CONDITION CHECK RESULT CAUSE REMEDY Lower heater Check continuity of j Malfunction of Adjust or Is not heated Primary interlock switch continuity primary Interlock Replace switch Check continuity of No Malfunction of 39 Adjust or secondary interlock I continuity secondary replace switch interlock switch Check continuity of No Replace heater continuity L Defective heater Check D C voltage FT OV p c Defective gt Replace Being supplied to Touch control RELAY RY7 coil circuit gt Approx P Faulty contacts of 39 Replace 24V DC RELAY RY7 or open relay coil TROUBLE 7 The following visual conditions inditions indicate a probable defective touch control Circuit or button P C B assembly 1 Incomplete segments 1 segment missing 2 partial segments missing 3 digit flickering other than normal fluorescent slight flickering A distinct change in the brightness of one or more numbers exists in the display ND SD I W
16. Use to add time to cooking m w Press to select microwave power level combi Press to select combi cooking mode auto defrost Press to select defrost menu convection Press to select convection temperature grill Press to select grill cake Press to select cake menu crusty Press to select crusty menu auto cook Press to select auto cook menu memory Use to set favorite cooking mode start speedy cook Press to start a programme also for speedy start each press adds 30 seconds microwave cooking time stop clear Press once to stop a programme and twice to cancel a programme dial knob Use to set time weight and quantity 6 DISASSEMBLY AND ASSEMBLY Cautions to be observed when trouble shooting Unlike many other appliances the microwave oven is high voltage high current eguipment It is completely safety 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 earthed Do not operate on a two wire extension cord The microwave oven is designed to be used with earthed It is imperative
17. completed d Tighten completely one mounting screws 17 8 TROUBLE SHOOTING Following the procedure below to check if the oven is defective not 1 2 3 4 your meter NOTE When electric parts are checked be sure the power cord is not inserted the wall outlet Check grounding before trouble checking Be careful of the high voltage circuit Discharge the high voltage capacitor When checking the continuity of the switches fuse or high voltage tranformer disconnect one load wire from these parts and check continuity with the AC plug removed To do otherwise may result in a false reading or damage to Check wire harness wiring and connection of the terminals and power cord before check the parts listed below TROUBLE 1 Oven does not operate at all any inputs can not be accepted CONDITION CHECK RESULT CAUSE REMEDY Fuse blows Check continuity of gt Continuity P gt Malfunction of gt L Replace interlock monitor switch with Interlock door closed monitor switch L No continuity Check continuity of No Malfunction of Replace both primary and s
18. lamp turns on and fan motor and turntable motor rotate and cook indicator in the display comes on Cause RELAY 7 does not operate B Ti L3 LOWER E 015 43 14148 GRILL ib Z RY 0J SS 124LM Q11 C106M STATE POINT A POINT B RELAY7 ON 5V DC 6 Case of no heating of convection grill When touching CONVECTION button oven lamp turns on and fan motor and turntable motor rotate and cook indicator in the display comes on Cause RELAY 3 does not operate B REPE 0 1 0 LY CONV ig 011 I 44 GRILL indus NN Q7 C106M G5G IA DT 24V 35 STATE POINT A POINT B RELAY 3 ON 5V DC GND RELAY 3 OFF GND 24V DC 7 Case of no stopping of the count down timer When the door is opened during operation the count down timer does not stop 35315 0210 DOOR OPEN OPEN 5V DC 1 CHECK NO METHOD REMEDY Check the stage ON OFF of the door 1 open monitor switch by resistance Replace door open monitor switch measurement 36 CIRCUIT DIAGRAM B 13 9d9 9 2 1 3 18 d19180S OTESSEPTSE PSSN E LOLN3 ZOLY pm J zo GO i 0184 IA LOLNO 4015 AMNIS ANONN X301 5531 380N 9 LLNS LMS DISEASES 1 NO S 3005
19. 00 WINDOW DISPLAY PMMA 1 B04 3516724100 CONTROL PANEL ABS XR 401 H 2938 1 B05 3516908300 BUTTON FUNCTION A ABS SG 175 SG 0760D 1 B06 3516908500 BUTTON FUNCTION C ABS SG 175 SG 0760D 1 B07 3516908400 BUTTON FUNCTION B ABS SG 175 SG 0760D 1 B08 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 3 B09 3514323010 PCB MAIN AS KOC 1BOKOS 1 B10 7121301011 SCREW TAPPING TS2 PAN 3X10 MFZN 7 B11 3514323110 PCB SUB AS KOC 1BOKOS 1 B12 3516908600 BUTTON FUNCTION D ABS SG 175 SG 0760D 1 B13 3516908700 BUTTON FUNCTION E ABS SG 175 SG 0760D 1 B14 3516908200 BUTTON START ABS SG 175 SG 0760D 1 B15 3513406000 KNOB VOLUME ABS SG 175 SG 0760D 1 6 Remove the screw which secure the control panel push up two snap fits and draw forward the control panel assembly 6 Remove three screws B08 which secure the control panel 6 Pull out the Main pcb assembly B09 6 Remove seven screws B10 which secure the control panel 6 Pull out the Sub pcb assembly B11 Pull out the Knob volume B15 from the Sub pcb assembly Pull out six buttons from the control panel Pull out the Decorator c panel B01 from the control panel Reverse the above steps for reassembly 6 7 8 Pull out Decorator ring B02 and Window display B03 from the control panel 9 10 6 remove high voltage capacitor 1 Remove a screw which secure the groun ding ring terminal of the H V diode and the capacitor holder 2 Remove the H V diode from the capacitor holder 3 Re
20. 1BOKOS 1 8 3513602600 LAMP HALOGEN 2 9 3511407810 COVER LAMP GLASS T2 0 1 1 Remove screw 1 and pull out Guideair outle 2 2 Remove two screws 4 and pull out Insulator heater 3 Pull out the Lamp assembly 4 Remove two screws 6 pull out the Lamp assembly 5 Pull out the Holder lamp assembly 7 from the Cover lamp 65 6 Pull out the Lamp 8 from the Holder lamp assembly 7 7 Reverse the above steps for reassembly 13 11 remove heater assembly parts REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK 1 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 1 2 3512520500 GUIDE AIR OUTLET SA1D T0 5 1 3 3513302800 INSULATOR HEATER T SBHG T0 6 1 4 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 2 5 3512767000 HARNESS HEATER KOC 1BOKOS 1 6 3510607700 BRACKET HEATER T SA1D 5 1 7 3512803800 HEATER MIRACLON 115V 550W 270MM 2 8 3511407600 COVER HEATER T STS430 T0 5 1 1 Remove screw and pull out Guide air outlet 2 Remove two screws and pull out Insulator heater 3 Pull out the Top heater assembly 4 Pull out the Harness heater 5 Pull out the Bracket heater t from the Cover heater 6 Pull out the Heater miraclon 7 from the Cover heater 7 Reverse the above steps for reassembly 14 12 To remove Rear heater assembly parts
21. PPING T2S TRS 4x12 MFZN 1 A07 3513101200 HOOK POM 1 A08 3515101800 SPRING HOOK PW1 1 A09 3511714100 DOOR SEAL AS KOC 1BOKOS 1 10 3512603500 HANDLE DOOR PC 1 1 Remove the gasket door from plate 2 Remove a screw from door plate 3 Remove the door frame from door plate 4 Remove the stopper hinge top from door plate 5 Remove the spring and the hook 6 Remove two screws from door frame 7 Remove the handle door and barrier screen outer from door frame 8 Remove the barrier screen outer from handle door 9 Reverse the above steps for reassembly 4 Method to reduce the gap between the door seal and the oven front surface 1 reduce gap located on part A 1 Loosen two screws on stopper hinge top and then push the door to contact the door seal to oven front surface 2 Tighten two screws 2 To reduce gap located on part B 1 Loosen two screws on stopper hinge under and then push the door to contact the door seal to oven front surface 2 Tighten two screws 5 remove control panel parts 801 B02 805 809 808 REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK B01 3511605000 DECORATOR C PANEL ABS 401 H 2938 1 B02 3511605100 DECORATOR RING ABS SG 175 SG 0760D 1 B03 35155017
22. S M No 05003 Service Manual Microwave Oven Model 1 5 DAEWOO ELECTRONICS CO LTD http svc dwe co kr Apr 2001 PRECAUTIONS 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 b Evidence of dropping or abuse c Before turning on power to the microwave oven 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 d 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 A microwave leakage check to verify compliance with the Federal performance standard should be performed on each oven prior to release to the owner TABLE OF CONTENTS 1 SAFETY AND PRECAUTIONS uzanan iii 2 P SPECIFICATIONS a a uc eae ae
23. afe Operation Damage that allows the microwave energy that cooks or heats the food to escape will result in poor cooking and may cause serious bodily injury to the operator IF ANY OF THE FOLLOWING CONDITIONS EXIST OPERATOR MUST NOT USE THE APPLIANCE Only 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 micro wave 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 2 For Safe Service 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 w
24. al 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 26 COOKING MODE MAGNE TRON UPPER ELEMENT LOWER ELEMENT REAR ELEMENT CONVEC TION FAN MANUAL MODE M W GRILL 1 GRILL 2 GRILL 3 COMBI 1 COMBI 2 COMBI 3 COMBI 4 COMBI 5 CONVECTION 100 130 E CONVECTION 140 150 E CONVECTION 160 250 E ONE TOUCH CAKE BREAD CRUSTY AUTO MODE ROAST BEEF ROAST CHICKEN ROAST PORK BAKED FISH BAKED POTATO ROAST POTATO FRESH VEGETABLES FROZEN VEGETABLES CASSEROLE 27 10 WIRING DIAGRAM NOSL3NOVA 20 MOTA 18 16 XN 4 TIAYLNYNL NYA NOLO3ANOD lt 30 00 HNO aso 5000 OLONO ASS EN d AU du Mi AU aH JANOD ABS AS 0010 A M
25. d operate the oven Measure the leakage by using Microwave Energy Survey Meter with dual ranges set to 2450MHz 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 When measuring the leakage always use the 5 cm 2 in 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 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 When measuring near a corner of the door keep the probe perpendicular to the areas making sure the probe end at the base of the cone does not get closer than 2 in from any metal If it does not erroneous reading may result 25 9 3 TEST PROCEDURE e High voltage is present at the high voltage terminal of the high voltage transformer during any cooking cycle e Itis neither necessary nor advisable to attempt measurement of the high voltage Before touching any oven components or wiring always unplug the oven from its power source and discharge the capacitor High voltage transformer A Remove connections from the transformer terminals and check continuity B Normal readings should be as follows Secondary winding
26. econdary Continuily interlock switch interlock switch with door closed Continuity Continuity Replace Check continuity of contacts primary interlock switch contact with anes itch door partially open until interlock interlock Swilc monitor switch contact close COMeNC close Check continuity of gt 0 Q or infinite 3 Defectivelow I Replace primary winding of low voltage voltage transformer Approx transformer 5300 normal gt Disconnect high voltage Fuse again gt Defective Replace fuse and operate the unit blows high voltage transformer 18 CONDITION CHECK RESULT CAUSE REMEDY Outlethas Check continuity of No Defective gt Replace proper magnetron continuity magnetron voltage fuse does not blow Check continuity of noise filter No Defective line Beads board continuity filter board P Check continuity of T No gt Openpower p Replace power supply cord continuity supply cord No Defective touch Replace continuity control circuit NOTE All these switches must be replaced at the same time please refer to 7 Interlock mechanism and adjust for adjustment instructions TROUBLE 2 Display shows all figures selected but oven does not start cooking even though desired program and time a
27. ith the door open the service person should tell the user not to operate the oven and contact the manufacturer immediately IMPORTANT The wire in this mains lead coloured in accordance with the following code Green and yellow Earth Blue Neutral Brown Live As the colours of the wires in the mains lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug proceed as follows The wire which is coloured green and yellow must be connected to the terminal in the plug which is marked with the letter E by earth symbol or green and yellow 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 NOTE This oven is designed for counter top use only 2 SPECIFICATIONS MODEL KOC 1BOK POWER SUPPLY 230V 50Hz SINGLE PHASE WITH EARTHING MICROWAVE GRILL CONSUMPTION CONVECTION COMBINATION 3100W MICROWAVE ENERGY OUTPUT 1000W IEC705 MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS W X H X D 560 x 344 x 542 mm 22 0 x 13 5 x 21 3 in CAVITY DIMENSIONS W X H X D 368 5 x 246 x 376 5 mm 14 5 x 9 7 x 14 8 in APPROX 21 5 Kg 47 6 1 2 SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE 3 EXTERNAL VIEW 3 1 OUTER DIMENSION 560 542
28. nny paler continuity Defective touch Replace control circuit 23 9 MEASUREMENT AND TEST 9 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 wit 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 approximately 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 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 Heating time should be exactly A seconds Refer to table as following Heating time is measured while the microwave generator is operating at full power The filament heat up time for magnetron is not included 6 Theinitial and final temperature of water is selected so that the maximum difference between the ambient and final water tempera
29. on and thus to perfectly prevent the danger resulting from the leakage of microwave 1 Primary interlock switch When the door is closed the hook locks the oven door If the door is not closed properly the oven will EE not operate When the door is FN losed the hook pushes the lock 13 lever downward The lock lever T ee SITO presses the button of the X microswitch Then the button of the primary interlock switch bring it under condition DON SWITCH 2 Secondary interlock switch w and interlock monitor switch When the door is closed the hook 2 pushes the lock lever downward ERX STO SC The lock lever presses the button of the interlock monitor switch to bring it under OFF condition and presses the button of the secondary interlock switch to bring it under ON condition ON DOOR OPEN CONDITION DOOR CLOSE Adjustment Interlock monitor switch When the door is closed the interlock monitor switch should be opened before other switches are closed When the door is opened the interlock monitor switch should be closed after other switches are opened 3 Adjustment steps a Loosen the one mounting screws b Adjust interlock switch assembly position c Make sure that lock lever moves smoothly after adjustment is
30. perate 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 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 earthing wire with a earthing plug The plug must be plugged into an outlet that is properly installed and earthed 5 CONTROL PANEL 1 2 7 3 6 4 5 language 8 10 9 less more 11 N q Comp 2 S auto N Z li 16 15 BL crusty 22 stop clear auto cook start speedy cook 21 2 DISPLAY WINDOW 1 2 MICROWAVE indicator showing microwaving in progress DEFROST indicator showing defrosting in progress GRILL upper grill heater indicator showing grilling in progress GRILL lower grill heater indicator showing grilling in progress CONVECTION indicator showing convectioning in progress CHILD LOCK indicator 96 percentage microwave power level indicator BUTTONS 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 language Press to select the language clock Use to set clock less Use to remove time from cooking more
31. re set and start button is tapped CONDITION CHECK RESULT CAUSE REMEDY Turn table gt Check continuity of No a Adjust or motor and primary interlock switch continuity primary Intertoc replace oven lamp switch do not tum on Check continuity of No Malfunction of Adjust or secondary interlock continuity gt gt secondary gt replace and D O M switch Interlock and D O M switch Check D C voltage FT ov Defective touch gt Replace being supplied to control Circuit RELAY RYA coil gt Approx gt Fault contacts Replace 24V DC of RELAY RY4 or open relay coil 19 TROUBLE 3 No microwave oscillation even though fan motor rotates CONDITION CHECK RESULT CAUSE REMEDY No Check continuity of microwave high voltage fuse continuity oscillation Replace high voltage fuse Check continuity of gt Continuity gt Defective Replace high voltage capacitor te
32. rminals high voltage with wires removed transformer Check continuity of gt Continuity Defective high 1 Replace L gt high voltage rectifier in forward In backward voltage rectifier and backward direction direction with DC megger Connect megger leadsto gt Continuity X Defective Replace magnetron terminal and magnetron magnetron body Check resistance of primary and 9 Q or lt gt Defective Replace secondary coil of high voltage high voltage transformer transformer Check continuity of magnetron M gt y o continuity Defective Replace heater with magnetron wires removed Check continuity of No continuity Defective high gt Replace filament terminal of voltage high voltage transformer transformer Check continuity of No continuity Defective Replace microwave select switch timer assy Check D C voltage gt 0v Defective Replace being supplied to touch control gt RELAY RY1 coil circuit Approx Faulty contacts of Replace 24V DC RELAY gt RY1 or open relay coil 20
33. therefore to makes sure it is earthed properly before beg inning repair work 2 Warning about the electric charge in the high voltage capacitor For about 30 seconds after the operation sto pped 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 screw driver 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 7 1 To remove cabinet 1 Remove four screws on cabinet back 2 Push the cabinet backward 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 assembly 3 To remove door parts REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK A01 3512204700 FRAME DOOR PC 1 A02 3517006900 BARRIER SCREEN O TEMP GLASS T3 2 1 A03 7112401011 SCREW TAPPING T1 TRS 4x10 MFZN 2 A04 3515204900 STOPPER HINGE T AS KOC 1BOKOS 1 A05 3512302300 GASKET DOOR PBT 1 A06 7122401211 SCREW TA
34. ture is 5K 7 The microwave power output P in watts is calculated from the following formula P 4187 x TA T is difference between initial and ending temperature tis the heating time The power measured should be B Refer to 2 SPECIFICATIONS W 10 0 96 us Heating time for power output A second 70 64 60 56 52 49 47 44 42 40 38 W 600 650 700 750 800 850 900 950 1000 1050 1100 9 2 MICROWAVE RADIATION TEST WARNING 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 your hands into any suspected microwave radiation field unless the safe density level is known Care should be taken not to place the eyes in direct line with the source of microwave energy e Slowly approach the unit under test until the radiometer reads an appreciable microwave leakage from the unit under the test PROCEDURE A Prepare Microwave Energy Survey 2 g m Meter 600cc glass beaker and glass thermometer 100 212 F Pour 275cc 15cc of tap water initially at 20 5 68 9 in the 600 cc glass beaker with an inside diameter of approx 95 mm 3 5 in Place it at the center of the tray and set itin a cavity Close the door an
35. verse 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 Metallic Magnetron antenna Wave guide Magnetron antenna L Cooling fin Filament terminal ETRON gt Metallic gasket plate 8 To remove wind guide assembly Remove a screw for earthing Remove the noise filter from the wind guide Remove a screw which secure the wind guide assembly Draw forward the wind guide assembly Pull the fan from the motor shaft Remove two screws which secure the motor shaded pole Remove the motor shaded pole Reverse the above steps for reassembly 2 1 2 3 4 5 6 7 8 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 12 10 To remove Lamp assembly parts REF NO PART CODE PART NAME DESCRIPTION Q TY REMARK 1 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 1 2 3512520500 GUIDE AIR OUTLET SA1D 5 1 3 3513302800 INSULATOR HEATER T SBHG T0 6 1 4 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 2 5 3511407800 COVER LAMP STS430 T0 5 1 6 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 2 7 3513003900 HOLDER LAMP AS KOC
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