Daewoo Electronics KOG-131A9A11 User's Manual
Contents
1. 2 CIRCUIT DIAGRAM 44 mwoixeqdius __ f3 gs 0 75 ol 7 214 gs 0 0 9 INV We 1 L Hrs 1i S IA ers 0 059 1nOX 9 zrs NX IE 4 b NAA ohren nsa wir 13 Zvol O ASIA PT v0 T 9 1 8 6 0012 1 001 NEE 028 2 I ET 207 TE he Tr N I a Z G SI N B amas 47 mal ALS Aot ML o T Y AS0 96e WA yi ony 150980 9 102 90 1 lun 1 wwvis 9015 ZINI AN EE Ly Ki l Ki zz toy N T i 1 41 VZOOPNL NaHOLIM 49079 HSI4 Aurinod Ivan i O 8 207 i d d 7 I IA Zr Leal 91 kel 1182 I ollz n 490001 sss Haxon DM gt UH oJ 3 rap oli PF yanavm 1857 rd Ir LT 18V1393A VZZld Ly I HS34j 39Vt3A38 137084 Hrd 7201 93 ps re E IA dS0620N Erin ela pay oo G Oe e au C L ONO aN SOAM a Na2. LS gE ee M TU MEN 71 NOTE Before following the particular steps listed above in the trouble shooting guide for the membrane keyboard s failure please check for the continuity of each wire harness between the membrane keyboard and P C B assembly SSS Se ee ee ee l 22 MEASUREMENT AND TEST 1 MEASUREMENT OF THE MICROWAVE POWER OUTPUT Microwave output power can be checked by indirectly mmeasuring the temperature rise of a certain amount of water exposed to the microwave as directed below PROCEDURE 1 2 an outside diameter of approximately 190 mm 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 The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and 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 If 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 microwav
3. 5 131 9 11001 Service Manual Microwave Oven Model KOG 131A9A11 v 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 CORP http svc dwe co kr Nov 2002 ra pere eral rer rare pere eral eee eee eee eee eee ee eee eee eee ele ee ee ele ele 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 6 Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source and make repairs if 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 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 do
4. Malfunction of Check continuity of interlock Continuity interlock NOTE 1 monitor switch with door closed monitor switch No Continuity Replace fuse Check continuity of primary Shorted interlock switch contact with door Continuity contacts of gt Replace partially open until interlock primary NOTE 1 monitor switch contact close interlock switch or infinite gt Replace Check continuity of primary Defective low winding of low voltage Approx voltage transformer 150 31 0 transformer normal gt Normal a Replace Disconnect one side of the lead Defective high wire connected form high voltage capacitor voltage transformer to the high voltage capacitor and operate Fuse again Detective high gt L Heplaee blows voltage transformer 19 CONDITION CHECK RESULT CAUSE REMEDY m Replace Outlethas _ an No Defective proper gt Check continuity of magnetron 3 Continuity magnetron voltage Fuse does not blow k Check continuity of No Open power __ Replace power supply cord
5. Continuity supply cord gt Normal Defective touch _Replace control circuit 5 Display do not shown gt Malfunction of Replace countdown D O M Switch a I NOTE I All these switches must be replaced at the same time please refer to Interlock Mechanism And Adjustment TROUBLE 2 Display shows all figures selected but oven does not start cooking even though desired program and time are set and start pad is tapped CONDITION CHECK RESULT CAUSE REMEDY Turntable faa Check continuity of primary gt Malfunction of Adjust or motor and interlock switch Continuity primary interlock replace oven lamp switch do not turn on Check continuity of secondary No Malfunction of Adjust or interlock switch Continuity secondary replace interlock switch Check D C voltage being gt ay P gt Defective touch gt Replace supplied to RELAY RY2 coil control circuit Approx Faulty contacts off gt REPAGE 15 VDC RELAY RY2 or open relay coil 20 TROUBLE 3 microwave oscillation even though fan motor rotates CONDITION CHECK RESULT CAUSE REMEDY No microwave 1 Check continuity of high _ Continuity Detective high 227 Replace oscillat
6. REFNO PART CODE PART NAME DESCRIPTION Q TY F34 3513601500 LAMP BL 125V 25W T25 C5A H187 1 F35 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 1 6 3966820200 MOTOR SYNCRO 120V 2W GM 16 12F17 1 F37 3518905300 THERMOSTAT OFF 75 ON 65 H 187 NB 1 F38 3513003410 HOLDER THERMOSTAT PP 1 F39 7272400811 SPECIAL TAPTITE TT3 TRS 4X8 MFZN 2 F40 3511405100 COVER WAVE GUIDE MICA T0 35 1 F41 4078502031 BUTTON LOCKING PP 2 F42 3517400620 COUPLER XAREC 1 F43 7392500008 NUT HEX 6N 2 5 SUS 2 F44 3514701501 ROLLER TEFLON D 14 5 3 F45 3512519300 GUIDE ROLLER PP 5113 MF6 A353R 1 F46 441CD35011 TRAY GLASS DIA 325 1320G 1 F47 3517202611 TRAY RACK AS KOC 961COS 117mm 1 F48 3518906200 THERMOSTAT OFF 70 ON 60 H 187 NB 1 F49 3513003400 HOLDER THERMOSTAT PP 1 34 S M G131A9A11001 DAEWOO DAEWOO ELECTRONICS CORP 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC PRINTED DATE Nov 2002
7. a nn su x uo E E d A X grirnik 613 a va sa I ode E NZO LYE Hi 9 900 dtu eNi 3 T dT vi 117 7869 4 I yr ae os P 12 Ob 163 E 4R 4 4 A NONISNOW 1 NZOLVE 7 068 y 3 eo em 60_ As 01 080 7 gt EHEN EEE E 9 __ 8c ef ee 3 6 NEON 7 N ____ ex AC TM N Sr NL 3 f 20 WI 9S9 I m T ZL 80 oy r 9 8 l l x id 9c 18 19 y gt E Dauer M E CUM eee M E D AW MS WOO 9 SY 7701 83 2 ore ou Ww se hed Z 1 ose zu M 1079 AW AW Le 9 w Eid 3001 FOX Ore 20 Old z pll Oc qu emque mcis zm ee Lm E 7 OE a gl Lid She w Li Old ose W ZO Ir Y I vore T63N NBOPOLTdRL neo ma etin a T 30 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 3 P C B LOCATION
8. be taken not to place the eyes in direct line with the source of microwave energy 5 Slowly approach the unit under test until the radiometer reads an appreciable microwave leakage from the SS PROCEDURE 1 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 600 cc glass beaker with an inside diameter of approx 95 mm 3 5 in 3 Place it at the center of the tray and set it in a cavity 4 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 cme 2 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 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 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 erroneo
9. times P 50 50 7 times P 40 40 8 times P 30 30 9 times P 20 20 10 times P 10 10 11 times P 00 0 DISASSEMBLY AND ASSEMBLY Cautions to be observed when trouble shooting Unlike many 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 wear 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 wire extension cord The microwave oven is designed to be used while grounded It is imperative therefore to make sure it is grounded properly before beginning repair work 2 Warning about the electric charge in the high voltage capacitor For about 30 seconds after the operation has stopped 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 20A fuse is blown due to the operation of the monitor switch replace primary interlock switch secondary
10. to contact the door seal to oven front surface n Tighten two screws B M FE asap AE qa FE EEE DO PL ENTF c M Iu TIERE ZIERT zal NOTE A small gap may be acceptable if the microwave leakage does not exceed AmW cm2 13 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 5 To remove control panel parts A N A S S CSS S RSS SS GS REFNO PART CODE PART NAME DESCRIPTION Q TY B01 3518523210 SWITCH MEMBRANE KOG 131A9A11 1 B02 3516723910 CONTROL PANEL ABS AF 345 VE 345 VE 0855 1 B03 3514324340 PCB AS KOG 131A9A11 1 B04 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN 3 B05 3513702800 LEVER DOOR OPEN PP 1 B06 441G430171 SPRING BUTTON SWP DIA 0 7 1 B07 3516908110 BUTTON DOOR OPEN ABS AF 345 VE 0855 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 three screws which secure the PCB assembly to control panel Disconnect membrane tail from the connector of the PCB assembly Detach membrane from the control panel Remove door open button and button spring from the contro
11. HERMOSTAT NONTOR SWITCH CY 8 Wi gt 77 NOTE RD lt RED BR BROWN CL c CAVITY LAMP CONDITION WH WU BL BLUE FM gt FAN BLOWER MOTOR DOOR CLOSED BK BAK GEARED MOTOR COOK lt OFF GN GREEN GE lt GREEN YELLOW PRINTED CIRCUIT BOARD 1 CIRCUIT CHECK PROCEDURE 1 Low voltage transformer check The low voltage transformer is located on the P C B Measuring condition Input voltage 120V Frequency 60Hz Terminal Voltage LOAD NO LOAD 4 7 AC 12 6 V AC 14 7 V I NOTE I l 1 Refer to Ciruit Diagram point 4 2 Secondary side voltage of the low voltage transformer changes in proportion to fluctuation of power source voltage 3 The allowable tolerance of the secondary voltage is within 5 of nominal voltage 2 Voltage Check Key check point NO CHECK POINT REMARK 1 IC1 PIN 2 21 30 34 5VDC 2 IC1 PIN 35 16 67ms 60Hz 3 IC1 PIN 31 OR 32 OV 5V I T T 250 ns 4MHz Check method NO MEASURE POINT WAVE FORM REMEDY REMARK 1 MP1 DC 5V 0 25V Replace VL1 EC1 NO LOAD 2 MP2 DC 12V 2 0V Replace EC2 D12 13 14 NO LOAD I C c x C Na a aC NOTE Each measure point must measured with GND points BEZ Up uma cS Ma DIEBE ZIEL SITES d 27 3 When there is microwave oscillation 1 When touching START pad oven lamp does
12. IC MICOM IC1 TMP47C440BN NF94 13GS371GH0 1 30 RESONATOR CR1 KBR 4 0MSTF 5PKBR40MKS 1 31 SW RELAY RY1 RY3 G5G 1A DC 12V 55C0101121 2 32 SW RELAY RY2 OJ SS 112LM 55C0101404 1 33 CAPACITOR C6 102 50V Z AXIAL CCZB1H102K 1 34 CAPACITOR C1 C3 C5 C7 104 50V Z AXIAL CCZF1H104Z 5 31 EXPLODED VIEW AND PARTS LIST 1 DOOR ASSEMBLY Refer to Disassembly and assembly 2 CONTROL PANEL ASSEMBLY Refer to Disassembly and assembly 3 TOTAL ASSEMBLY 32 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 REFNO PART CODE PART NAME DESCRIPTION Q TY A00 3511713500 DOOR AS KOR 131G0A 1 3516726150 CONTROL PANEL AS KOG 131A9A11 1 C00 3513302410 INSULATOR HEATER AS KOG 211M0A 1 F01 3510806600 CABINET AS SECC T0 6 1 202 3516004100 SPECIAL SCREW T1 TRS LR4 POLE 4X10 SE MFZN 3 3516112900 AS KOG 131A0S 1 204 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN 1 F05 7122401211 SCREW TAPPING T2S TRS 4 12 1 206 7112401011 SCREW TAPPING T1 TRS 4 10 MFZN 1 207 35113TCN35 CORD POWER AS 3X16AWG 40X40 120 RTM 1 208 7122401211
13. NO 1 KOG 131A0A NO NAME SYMBOL SPECIFICATION PART CODE Q TY 1 BUZZER BZ1 BM 20K 3515600100 1 2 C ARRAY CA1 7P 6 102 M 50V CN6XB 102M 1 3 CAPACITOR ELEC EC1 50V RS 1uF CEXE1H109A 1 4 CPAPCITOR ELEC EC2 25V RSS 1000uF CEXF1E102V 1 5 CONNECTOR WAFER YW396 02AV 3519150520 1 6 CONNECTOR WAFFR CN2 YW396 05AV 3519150510 1 7 CONNECTOR WAFER CN3 FCZ254 11 441M367160 1 8 DIODE RECTIFY D1 6 8 12 15 1N4148 DZN4148 12 9 DIODE RECTIFY D13 14 1N4004A DZN4004A 2 10 DIODE ZENER ZD1 UZ 5 1BSB 1 2W DZUZ5R1BSB 1 11 DIODE ZENER ZD2 UZ 3 3BSB 1 2W DZUZ3R3BSB 1 12 LED DISPLAY DP1 DDG 631H DDDG631H 1 13 PCB MAIN M158 81 5X139 9 3514315410 1 14 R ARRAY RA1 7P 6 1 8 100K J RA 87X104J 1 15 RESISTOR Ri R7 1 6W 220 5 RD AZ221 J 7 16 RESISTOR 8 10 12 14 22 1 6W 1K 5 RD AZ102J 5 17 RESISTOR R11 20 21 1 6W 100K 5 RD AZ104J 3 18 RESISTOR R13 1 6W 100 5 RD AZ101 J 1 19 RESISTOR R15 17 1 6W 10K 5 RD AZ103J 3 20 RESISTOR R18 1 6W 1M 5 RD AZ105J 1 21 RESISTOR R19 1 4W 51 5 RD AZ510J 1 22 RESISTOR R23 1 6W 4 7K 5 RD AZ472J 1 23 REGULATOR VL MC7905C 1MC7905C 1 24 TRANSISTOR 0155 8 11 KRA 106M TZRA106M 9 25 TRANSISTOR 06 KTA 1266 TZTA1266Y 1 26 TRANS POWER LVT1 DMR 631P 5EPU035302 1 27 WIRE COPPER J1 3 5 8 10 12 17 21 1 0 52 TIN COATING 85801052GY 15 28 WIRE COPPER SJ1 3 5 1 0 52 TIN COATING 85801052GY 3 29
14. RINTED CIRGUIT BOARD M 27 GIRGUIT GHECKPROGEDURE erre eee te rer tocado pee gue 27 P G B GIRCUIT DIAGRAM ertet te Rire regie EB be Dae energie 30 P G B EOGATIONJNO ttt ree ttem teo rt EE t De eiae eti De RT D MR d 31 EXPLODED VIEW AND PARTS LIST UU 32 DOOR ASSEMBLY tite ae be pen d ee et pe te 32 CONTROL PANEL ASSEMBLY 2 2 ee ae tp e BERE REEL o Ge nf re Rer ees dee dees 32 5 near RU ea act et Rr REDE NUIT RD gen ie ninth au amsa qg 32 SAFETY AND PRECAUTIONS CAUTION This Device is to be Serviced Only by Properly Qualified Service Personnel Consult the Service Manual for Proper Service Procedures to Assure Continued Safety Operation and for Precautions to be Taken to Avoid Possible Exposure to Excessive Microwave Energy 1 FOR SAFE 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 Aloosened 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
15. SCREW TAPPING T2S TRS 4 12 MFZN 1 F09 78627W50X1 NUT HEX NUT FLANGE M5X0 8P MFZN 1 F10 7121403011 SCREW TAPPING T2S PAN 4 30 MFZN 2 F11 3963822200 MOTOR SHADED POLE 120V 30W OEM 15DWX1 B07 1 F12 3512520000 GUIDE WIND PP 1 F13 3511800100 FAN PP GF20 1 F14 3518003200 MAGNETRON 2M218H F P 1 F15 3516003800 SPECIAL SCREW T2 FLANGE 5X8 MFZN 1 F16 7272400811 SCREW TAPTITE TT3 TRS 4 8 MFZN 1 F17 3513003200 HOLDER HV CAPACITOR SECC T0 6 1 F18 3518302200 CAPACITOR HV 2100VAC 0 980UF 187 1 F19 3518400400 DIODE HV HVR 1X 3AB 12KV 187 1 F20 3518116701 TRANS HV DW N95A0 13T 1 F21 3516003700 SPECIAL SCREW TT3 HEX 4X8 FLG MFZN 4 F22 3510313400 BASE SBHG T0 7 1 223 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 5 F24 3512100900 FOOT PP DASF 130 2 F25 7272400811 SREW TAPTITE TT3 TRS 4X8 NFZN 1 226 3515202800 STOPPER HINGE U AS KOR 121M0A 1 227 3512718510 HARNESS MAIN KOG 131A0A 1 F28 4415A17352 SW MICRO VP 533A 0F SPNO 187 200g 1 229 4415A66600 SW MICRO VP 532A OF SPNC 187 200G 1 F30 4415A66910 SW MICRO VP 531A OF SZM V16 FA 61 1 1 3518571000 SWITCH PUSH MP101C 1 F32 3513702600 LEVER LOCK POM 1 F33 3513814300 LOCK POM 1 33 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
16. TENNA WHILE THE DEVICE IS ENERGIZED SPECIFICATIONS MODEL KOG 131A9A11 POWER SUPPLY 120V 60Hz SINGLE PHASE WITH EARTHING POWER MICROWAVE 1350W CONSUMPTION GRILL 1150W MICROWAVE ENERGY OUTPUT 1000W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS W X H X D 563X318X418mm 22 1X12 5X16 5 in CAVITY DIMENSIONS W X H X D 380X246X386mm 14 9X9 7X15 2 in NET WEIGHT APPROX 17 5kg 38 6 Ibs TIMER 99min 99sec FUNCTION SELECTIONS MICROWAVE GRILL POWER SELECTIONS 10 LEVELS CAVITY VOLUME 1 3 Cu Ft Specifications are subject to change without notice EXTERNAL VIEW 1 OUTER DIMENSION 2 FEATURE DIAGRAM L 7 ie 10 I G 9 LL ET om 2 W 17 E gt gt DOOR SEAL Door seal maintains the microwave within the oven cavity and prevents microwave leakage DOOR HOOK When door is closed it will automatically lock shut If door is opened while oven is operating magnetron tube will immediately stop operating DOOR SCREEN Allows viewing of food Microwave cannot pass through perforations in screen SPATTER SHIELD Protects the microwave outlet from splashes of cooking foods OVEN LAMP Automatically turns on during oven opera
17. e generator is operating at full power The filament heat up time for magnetron is not included The initial and final temperature of water is selected so that the maximum difference between the ambient and final water temperature is 5K The microwave power output P in watts is calculated from the following formula P 4187 X AT 15 difference between initial and ending temperature tis the heating time The power measured be B Refer to SPECIFICATIONS 10 0 DICIT DIT ICI CAUTION 1 Water load should be measured exactly to 1 liters 2 Input power voltage should be exactly specified voltage Refer to SPECIFICATIONS 3 Ambient temperature should be 20 2 C 68 3 6 F LE LLL A AXE um d as mA M Ga GE ua S d Cus RR du Fa MM EDGE ZZ ZI 2 M a 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 23 2 MICROWAVE RADIATION TEST BE TE En re En TREE CR CR EDEN I CAUTION I I I I I unit under the test 1 Make sure to check the microwave leakage before and after repair of adjustment 2 Always start measuring of an unknown field to assure safety for operating personnel from microwave energy 3 Do not place your hands into any suspected microwave radiation field unless the safe density level is known 4 Care should
18. e 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 3 To remove door parts REF PART CODE PART NAME DESCRIPTION Q TY A01 3512204500 FRAME DOOR ABS XR 401 SR 0320M 1 A02 3517006500 BARRIER SCREEN O PEPT T0 25 1 A03 3515202900 STOPPER HINGE T AS KOR 121M0A 1 A04 3511713600 DOOR PAINTING AS KOR 131G0A 1 A05 3517006400 BARRIER SCREEN I PE TO 1 1 A06 3512302200 GASKET DOOR PP 1 A07 3513101400 HOOK POM 1 A08 3515101900 SPRING HOOK PW 1 1 3 4 5 6 7 1 Remove the gasket door from door plate 2 Remove the barrier screen inner from door plate Remove the door frame from door plate Remove the stopper hinge top from door plate Remove the spring and the hook Remove the barrier screen outer from door frame Reverse the above steps for reassembly 12 4 Method to reduce the gap between the door seal and the oven front surface 1 To reduce gap located on part A Loosen two 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 gt s E the door
19. en the door is opened the interlock monitor switch should be changed NC condition after other switches are opened ETUDES 3 Adjustment steps 8 Loosen the one mounting screw b Adjust interlock switch assembly position c Make sure that lock lever moves smoothly after adjustment is completed d Tighten completely two mounting screws NOTE Microwave emission test should be performed after adjusting interlock mechanism If the microwave emission exceed 4mW cm readjust interlock mechanism TROUBLE SHOOTING GUIDE Following the procedure below to check if the oven is defective or not 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 your meter 1 2 3 4 DU NEES E ag ee UE T E AR EU ME UE on EE E NOTE When electric parts are checked be sure the power cord is not inserted the wall outlet Check wire harness wiring and connection of the terminals and power cord before check the parts listed below DETTO TROUBLE 1 Oven does not operate at all any inputs can not be accepted CONDITION CHECK RESULT CAUSE REMEDY Fuse blows gt I Replace
20. er Used as a minute timer delay cooking hold setting after cooking 11 Clock Used to set clock 12 Stop Clear Used to stop the oven operation or to delete the cooking data 13 Start Speedy cook Used to start the oven and also used to set a reheat time 14 Grill Used to cook grill INSTALLATION 1 Steady flat location This microwave oven should be set on a steady flat surface This microwave oven is designed for counter top use only 2 Leave space behind and side All air vents should be kept a clearance If all vents are covered during operation the oven may overheat 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 Check your local power source This microwave oven requires a current of approximately 12 amperes 120 Volts 60 Hz grounded outlet Power supply cord is about 0 8 meters long 1 A short power supply cord is provided to reduce the risks resulting from becoming entangled in or tripping over a longer cord 2 Longer cord sets or extension cords are available and may be used if care is exercised in their use 3 If along cord or exte
21. 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 cux ee re sss CAUTION Service personnel should remove their watches whenever working close to or replacing the magnetron I Sig me VU E Mp c v ccce e a I WARNING When servicing the appliance take care when 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 10 1 To remove cabinet er p Q 1 Remove three screws on cabinet back ee h c H A nr 2 Push the cabinet backward SN gt A 4 x ge Pd Do 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 EE CEU M MCI RM MC CIIM X IX UEM RI EET NOTE After replacing the door assembly perform a check of correct alignment with the hinge and cavity front plate U B 11 v Caution In this Service Manual some parts can be changed for improving their performanc
22. ion voltage capacitor terminals voltage with wires removed transformer Continuity in Replace Check continuity of high voltage Defective high I rectifier in forward and backward backward voltage rectifier direction with DC megger direction Connect megger leads to gt Continuity gt Defective gt Replace magnetron terminal and magnetron magnetron body 0Noro I Check resistance of primary and Defective high gt Replace secondary coil of high voltage voltage transformer transformer T gt 3 Replace Check continuity of magnetron Continuity Defective with wires removed magnetron Check continuity of filament gt Defective high Replace terminal of high voltage Continuity voltage transformer transformer gt gt Replace Check D C voltage being Defective touch supplied to RELAY RY1 coil control circuit gt Approx gt Faulty gt Replace 15 VDC contacts of RELAY or open relay coil 21 TROUBLE 4 The following visual conditions indicate probable defective touch control circuit or membrane switch assembly Incomplete segments 1 Segments missing 2 Partical segments missing 3 Digit flickeri
23. l panel Reverse the above steps for reassembly 3 4 5 6 7 14 6 To remove high voltage capacitor 1 Remove a screw which secure the grounding ring terminal of the H V diode and the capacitor holder 2 Remove the H V diode from the capacitor holder 3 Reverse the above steps for reassembly 7 High voltage circuit wiring 8 To remove magnetron 1 Remove a screw which secure the magnetron 2 Remove the magnetron 3 Reverse the above steps for reassembly lt me e e e e e e e e e e e e e e e e e e e e e m e m m e m m e m m e 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 prevent microwave leakage Whenever repair work is carried out on magnetron check the microwave I leakage It shall not exceed 4mW cm for a fully assembled oven with door normally closed I SSS Metallic Magnetron Wave guide Magnetron antenna gasket antenna plate 1 f N MG Cooling fin __ Filament terminal lt MAGNETRON gt Metallic gasket plate 15 9 remove wind guide assembly 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 ste
24. minate microwave radiation when the door is opened during operation and thus to perfectly prevent the danger resulting from the leakage of microwave LI 5 DOOR LATCH x gt 9 gt 5 bd BK Wu _ 0 RD BK FRONT PLATE PRIMARY INTERLOCK SWITCH A NTERLOCK MONITOR SWITCH d LAMP SWITCH BUTTON SECONDARY gy INTERLOCK SWITCH b GN MOUNTING SCREW BL LOCK LEVER WH WHITE BK BLACK RD RED GY GRAY GN GREEN BL BLUE Condition DOOR CLOSE Condition DOOR OPEN 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 not operate When the door is closed the hook pushes the button of the micro switch Then the button of the primary interlock switch bring it under NO condition 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 NO condition The lock lever presses the button of the secondary interlock switch to bring it under NO condition ILLE aS a pc pees ee a 1 ADJUSTMENT Interlock monitor switch When the door is closed the interlock monitor switch should be changed NO condition before other switches are closed I Wh
25. ng other than normal display slight flickering 4 0 does not display when power is on 2 A distinct change in the display are not on when they should be M W Defrost Grill 3 One or more digits in the display are not on when they should be Timer y 4 Display indicates a number different from one touched 5 Specific numbers for example 2 or 3 will not display when the panel is touched 6 Display does not count down or up with time cooking or clock operation 7 Oven is programmable and cooks normally but no display shows 8 Display obviously jumps in time while counting down 9 Display counts down noticeably too fast while cooking 10 Display does not show the time of day when clear pad is touched 11 Oven lamp and turntable motor do not stop although cooking is finished Check if the RELAY 2 contacts close If they are close replace touch control circuit CONDITION CHECK RESULT CAUSE REMEDY Norma gt Display does Check each pad for ES Malfunction Replace not show continuity of the membrane of touch control box programming keyboard for the following control circuit sub assembly at all even if keyboard check procedure of control box keyboard is sub assembly touched gt Abnormal gt Malfunction gt Replace the of the membrane membrane keyboard keyboard Sh RORIS eae
26. not turn on Fan motor does not rotate but cook indicator in display comes on Cause RELAY 2 does not operate gt refer to Circuit Diagram point 3 Check method POINT STATE 5 E RELAY 2 ON 5VDC GND RELAY 2 OFF GND 12VDC 2 When touching START pad oven lamp turns on Fan motor and turntable rotate and cook indicator in display comes on Cause RELAY 1 does not operate gt refer to Circuit Diagram point 2 Check method POINT STATE z E RELAY 1 ON 5VDC GND RELAY 1 OFF GND 12VDC 4 When there is no grill oscillation Cause RELAY 3 does not operate gt refer to Circuit Diagram point 6 Check method POINT STATE RELAY 3 5VDC GND RELAY 3 OFF GND 12VDC 5 When the door is opened during operation the count down timer does not stop refer to Circuit Diagram point 1 Check method POINT STATE A B 1 DOOR OPEN OPEN 5VDC 2 DOOR CLOSED CLOSE GND CHECK NO METHOD REMEDY 1 Check the stage ON OFF of the door open monitor Replace door open monitor switch switch by resistance measurement 6 When the digital clock does not operate properly refer to Circuit Diagram point 5 POINT WAVE FORM A T 16 67 ms 60Hz If clock does not keep exact time you must check resistor R15 16 zener diode ZD1 29
27. nsion cord is used 1 The marked electrical rating of the cord set or extension cord should be at least as great as the electrical rating of the appliance 2 The extension cord must be a grounding type 3 wire cord 3 The longer cord should be arranged so that it will not drape over the counter top or tabletop where it can be pulled on by children or tripped over unintentionally 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 OPERATIONS AND FUNCTIONS 1 Connect the main lead to an electrical outlet always be in place during cooking Close the door securely When the oven door is opened the light turns on The oven door can be opened at any time during operation by touching the door release button on the control panel The oven will automatically shut off To restart the oven close the door and then touch START O retained Each time a pad is touched a BEEP will sound to acknowledge the touch The oven automatically cook on full power unless set to a lower power level The display will show 0 when the oven is plugged in Time clock returns to the present time when the cooking time ends 0 When the STOP CLEAR pad is touched during the oven operation the oven stops cooking and all information Af
28. 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 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 with the door open the service person should tell the user not to operate the oven and contact the manufacturer and CDRH immediately TC COUR it UU wi Y e Mallem een CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT BE EXPOSED TO THE MICROWAVE ENERGY WHICH MAY RADIATE FROM THE MAGNETRON OR OTHER MICROWAVE GENERATING DEVICE IF IT IS IMPROPERLY USED OR CONNECTED ALL INPUT AND OUTPUT MICROWAVE CONNECTIONS WAVEGUIDES FLANGES AND GASKETS MUST BE SECURED NEVER OPERATE THE DEVICE WITHOUT A MICROWAVE ENERGY ABSORBING LOAD ATTACHED NEVER LOOK INTO AN OPEN WAVEGUIDE OR AN
29. or 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 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 SAFETY AND PRECAUTIONS c 3 FOR SAFE OPERATION 2 i re ede od eed Ries eerie 3 FOR SAFE SERVICE PROCEDURES uu aici gn ndi Rs 3 SPEGIFICATIONS Pc 4 EXTERNAL VIEW m 5 OUTER DIMENSION u u iret Rn Rain 5 FEATURE DA GRA M EE 6 een T E E A 7 INSTALLATION Ec 8 OPERATIONS AND FUNCTIONS I u u u uuu RI 9 DISASSEMBLY AND ASSMBLY I UU a aaa Sa ss anqana asas sss a sns Rasa sn atate se anas 10 INTERLOCK MECHANISM AND ADJUSTMENT U u uuu uuu u 18 TROUBLE SHOOTING GUIDE S siku aa a apasaq Da p asua asa 19 TEST Eee einbauen 23 MEASUREMENT OF THE MICROWAVE POWER OUTPUT sse nennen tenentes 23 MICROWAVE RADIATION TEST entree t rte Ban Dee 24 COMPONENT TEST PROGEDURE teer tatem netu o Dag ter tn d eier lu 25 WIRING DIAGRAM oec 26 P
30. ps for reassembly SS Em 1 2 3 4 5 6 gS gt 10 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 16 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 11 To remove insulator Heater assembly 1 2 Remove the HEX NUT F09 Remove the two HEX NUTS F43 Remove the insulator Heater assembly Reverse the above steps for reassembly Ua SS 3 4 C02 C03 REF NO PART NAME PART CODE DESCRIPTION Q TY C01 INSULATOR HEATER 3513302200 SPP TO 8 1 C02 HEATER 3512802800 120V 1100W 1 C03 SCREW MACHINE 7002500613 TRS 5X6 MFCR 1 C04 NUT HEX 7392500008 6N 2 5 SUS 1 C05 SCREW MACHINE 7002400413 TRS 4X4 MFCR 2 C06 SPACER INSULATOR 7 3515000600 C3771BD 2 1 2 Remove the HEX NUTS C04 Remove the insulater Heater 01 and Heater C02 Remove the two screws C05 Reverse the above steps for reassembly UA LA Se 3 4 17 INTERLOCK MECHANISM AND ADJUSTMENT The door lock mechanism is a device which has been specially designed to completely eli
31. ter placing the food in a suitable container open the oven door and put it on the glass tray The glass tray must To erase all information except the present time touch the STOP CLEAR pad once more If the oven door is opened during the oven operation all information is retained 11 If the START pad is touched and the oven does not operate check area between the door and door is closed securely The oven will not start cooking under the door is completely closed or the program has been reset 12 When using the GRILL mode Do not open the door so often the temperature inside the oven decrease and the cooking may not be completed in setting time Never touch the oven window and metal interior of the oven when taking food in and out because the temperature inside the oven and door is very high When using these modes be careful as the tray will be hot to touch use oven gloves or pot holders while handing tray Make sure the oven is properly installed and plugged into the electrical outlet ee nM Wattage output chart The power level is set by pressing the M W pad The chart shows the display the power level and the percentage of power Touch M W pad Power level Display Approximate Percentage of Power Once P HI 100 Twice P 90 90 3 times P 80 80 4 times P 70 70 5 times P 60 60 6
32. ting SAFETY INTERLOCK SYSTEM 7 CONTROL PANEL 8 GLASS COOKING TRAY 9 Made of special heat resisant glass The tray must always be in proper position before operating Do not cook food directly on the tray OVEN FRONT PLATE 10 DOOR OPENING BUTTON To open the door push the door opening button When door is closed it will automatically lock shut If door is opened while oven is operating magnetron tube will immediately stop operating 11 ROLLER GUIDE Supports the glass cooking tray 12 REFLECTOR INSULATOR HEATER 13 HEATING ELEMENT 14 METAL RACK 3 CONTROL PANEL M W Defrost Grill Timer p Bread Sou 3 Baked Potato Auto 4 Fresh Vegetable Cook 5 Frozen Vegetable M W Grill Defrost Dish Warmer En Frozen _ Beverage Pizza Auto Defrost Fish Poultry Meat Stop Clear Start Speedy cook Grill Time set pad Used to set the cooking time and the present time Display Cooking time power level indicators and present time are displayed One touch Used to cook or reheat specific quantities of food Auto cook Used to cook or reheat More Used to increase time to cooking Less Used to decrease time from cooking Auto Defrost Used to defrost foods for weight M W Used to set power level O 0 FP N Defrost Used to defrost 10005 time 10 Kitchen Tim
33. us reading may result 24 3 COMPONENT TEST PROCEDURE High voltage is present at the high voltage terminal of the high voltage transformer during any cooking cycle It is 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 1 High voltage transformer 1 Remove connections from the transformer terminals and check continuity 2 Normal readings should be as follows Secondary winding Approx 110 Q 10 Filament winding Approx 0 Primary winding Approx 1 Q 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 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 Isolate 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 should be used to check the front back resistance of the diode otherwise an infinite resistance ma
34. y 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 1 Q 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 25 PRIMARY 26 WIRING DIAGRAM INTERLOCK HIGH VOLTAGE THERWOSTAT SWICH UPPER pp MORIR ZA WH 5 RD 1 CONTROL PNB ASSY F 77 I Sal PONER SUPPLY 120 60 HZ Sal E SINGLE PHASE ONLY I Er E RELAY 2 FUSE IM D4 H HY RELAY 3 l ir NEUTRAL i CAPACITOR MAGNETRON DIODE RD GRILL imam Ny T
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