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Service Manual

Microwave Oven

KOG-261M, KOG-262M
KOG-281M, KOG-282M

DAEWOO ELECTRONICS CO., LTD.

Содержание KOG-261M

Страница 1: ...Service Manual Microwave Oven KOG 261M KOG 262M KOG 281M KOG 282M DAEWOO ELECTRONICS CO LTD...

Страница 2: ...r door seal and microwave gerneration and transmission systems shall be repaired or adjusted by proce dures described in this manual before the oven is released to the owner e A micrewave leakage chec...

Страница 3: ...ed 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...

Страница 4: ...MENSIONS W x D x H NET WEIGHT TIMER FUNCTION SELECTIONS MICROWAVE POWER LEVELS KOG 261M 262M KOG 281M 282M 120V 60Hz SINGLE PHASE WITH EARTHING 920W 1200W 1050W 1050W 600W 800W 2450MHz 465 x 360 x 274...

Страница 5: ...f food The Screen is designed so that light can pass through but not the microwaves 10 Time set pad Used to set the cooking time and the present time 11 Display Cooking time power level pre sent time...

Страница 6: ...and TV sets Poor television reception and radio interference may result if the oven is located close to a TV Radio or antenna feeder and so on Position the oven as far from them as possible Away from...

Страница 7: ...e 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 When the...

Страница 8: ...king and the colon starts blinking If you selected 12 hour clock system this digital clock allows you to set from 1 00 to 12 59 If you selected 24 hour clock system this digital clock allows you to se...

Страница 9: ...er pads for the defrosting weight you want The display will show the num bers you pressed in the order you tou ched 5 0 0 3 Touch START pad WEIGHT DEFROSTING begins The defrosting time is automaticall...

Страница 10: ...defrosting time you want The display will show the num bers you pressed in the order you touched 2 7 1 0 NOTE Your oven can be programmed for 59 minutes 99 sec 4 Touch START pad When you touch START p...

Страница 11: ...ar 3 beeps START 2 Touch the number pad for the power level you want The display will show what you touched This example shows power level 3 3 NOTE If steps 1 and 2 are omitted the oven will cook at f...

Страница 12: ...GRILL indicator lights and 0 is displayed GRILL 3 Touch START pad When you touch START pad the GRILL indicator starts blinking to show the oven is cooking The display count down the time to show how...

Страница 13: ...n light turns on The AUTO START indicator goes off and the next stage indicator begins to blink When the cooking is completed you will hear 3 beeps The oven turns off and the present time appears in t...

Страница 14: ...100 full power by simply touching the SPEEDY COOK pad By repeatedly touching the SPEEDY COOK pad you can also extend reheating time to 5 minutes by 30 seconds DO THIS THIS HAPPENS 1 Touch CLOCK A STAR...

Страница 15: ...y changed into cooking time of quantity and the oven starts cooking FROZEN PIZZA 1 Touch BEVERAGE pad When you touch BEVERAGE pad 1 is displayed After 1 5 seconds the display changed into cooking time...

Страница 16: ...within 1 5 seconds NOTE 1 This setting is good for restoring cooled beverage to a better drinking temperature 2 Stir after cooking 1 Touch DINNER PLATE pad When you touch DINNER PLATE pad 300 is disp...

Страница 17: ...ouch MENU twice AC 3 SOUP Touch MENU three times AC 4 FISH FILLETS Touch MENU four times AC 5 MEAT LOAF Touch MENU five times 1 Touch WEIGHT pad 1 is displayed After the 1 5 seconds the dis play chang...

Страница 18: ...tor lights To cancel press STOP CLEAR for 3 seconds LOCK indicator goes off TO STOP THE OVEN WHILE THE OVEN IS OPERATING 1 Press STOP CLEAR pad You can restart the oven by touching START pad Touch STO...

Страница 19: ...the door is closed the hook locks the oven door If the door is not closed properly the oven will not operate Whem the door is closed the hook pushes the button of the micro switch Then the button of t...

Страница 20: ...ld exceed 1 2mm measured at the top of the button 3 Adjustment steps a Loosen the two mounting screws b Adjust interliock switch assembly position c Confirm the gap 1 2mm described above d Make sure t...

Страница 21: ...tive therefore to makes sure it is grounded properly vefore before begining repair work 2 Warning about the electric charge in the high voltage capacitor For about 30 seconds after the operation stops...

Страница 22: ...ly 1 Remove two screws F40 which secure the top hinge seoppr F37 2 Remove the door assembly F00 from the top plate of cavity 3 Reverse the above for reassembly 3 To remove door parts NOTE After replac...

Страница 23: ...the door to con tact the door seal to oven front sur face 3 Tighten two screws 2 To reduce gap located on part B 1 Loosen three screws in under hinge stopper and then the door to contact the door seal...

Страница 24: ...23...

Страница 25: ...6 and capacitor holder F14 2 Remove the capacitor holder F14 with capacitor F15 3 Reverse the above steps for reassembly High voltage circuit wiring 7 To remove magnetron 1 Remove three screws F07 whi...

Страница 26: ...om the motor F11 4 Remove the above steps for reassembly 9 To remove thransformer 1 Remove the four screws F21 holding the H V tramsformer F20 2 Remove the transformer F20 3 Reverse the above steps fo...

Страница 27: ...er 2 3 Remove the two screws 5 4 Reverse the above steps for reassembly NO PART NAME PART CODE Q TY DESCRIPTION REMARK 26 1 2 3 4 5 6 7 INSULATOR HEATER HEATER SCREW MACHINE NUT HEX SCREW MACHINE SPAC...

Страница 28: ...h assembly TROUBLE SHOOTING GUIDE 1 Incomplete segments A Segments missing B Partical segments missing C Digit flickering other than normal fluores cent slight flickering D 0 does not display when pow...

Страница 29: ...tinuity of the membrane keyboard for the following keyboard check Condition Display does not show programming at all even if keyboard is touched Normal Malfunction of touch control circuitry of contro...

Страница 30: ...EEDY COOK pad Between A and I 5 MENU pad Between A and K 6 6 pad Between B and F 7 1 pad Between B and G 8 GRILL pad Between B and I 9 WEIGHT pad Between B and K 10 7 pad Between C and F 11 2 pad Betw...

Страница 31: ...y Interlock Switch contact with door partially open until interlock monitor switch contact close Continuity Shorted contacrs of primary inter lock switch Replace 15A fuse Defective high voltage trans...

Страница 32: ...upply cord Replace Normal Defective touch control circuit Replace Display do not shown countdown Malfunction of secondary interlock switch Outlet has proper voltage Fuse does not open Check Result Cau...

Страница 33: ...nuity of connecting wire of magnetron Condition No microwave Continuity Replace Check the isola tion of filament wind ing No Good Defective high voltage transformer Replace Good No Continuity Defectiv...

Страница 34: ...Cause Cause Customer education Check the power source voltage with magnetron oscillating Condition Output power is low Lower than 108 volts Descrease in power source voltage Normal Replace Check the...

Страница 35: ...he microwave generator is operatng at full power The filament heat up time for magnetrons is not included 6 The initial and final water temperatures are selected so that the maximum difference betwen...

Страница 36: ...lly assembled oven with door normally closed must be less than 4mW cm2 When measuring the leakage always use the 5cm space cone with probe Hold the probe per pendicular to the cabinet door place the s...

Страница 37: ...36 WIRING DIAGRAM...

Страница 38: ...agnetron by blowing the air coming form the intake on the rear plate hold 3 The oven lamp light the inside of the oven 4 Indicator light turns on to indicate function operation Cooking time starts cou...

Страница 39: ...AY 1 in order to vary the output power of the microwave oven from power level 1 to HI 100 power One complete ON and OFF cycle of the RELAY 1 is 29 seconds The relation between indications on the contr...

Страница 40: ...the door is opened the interlock monitor switch contacts close and creats the short circuit 6 If the contacts of primary interlock switch malfunction the 12A fuse blows open due to the large current s...

Страница 41: ...g Approx 90 10 Filament winding Approx 0 Primary winding Approx 0 2 High voltage capacitor A Check continuity of capacitor with meter on the highest OHM scale B A normal capacitor will show continuity...

Страница 42: ...k is interlock monitor switch primary and secondary interlock switches check Make circuits like Fig a Fig b tests SAFETY INTERLOCK CONTINUITY TEST 1 In case of interlock monitor check Lamp on or zero...

Страница 43: ...Voltage Transformer DMR 604P Check The low voltage transformer is located on the P C B Measuring condition Input voltage 120V Frequency 60Hz 2 Voltage Check Key check point CHECK METHOD 6 7 24V 30V 8...

Страница 44: ...15 42 LOCK M W NO CUPS g don t come on UPPER BAR h 5 33 GRILL TIME DEFROST LOWER BAR i 34 WEIGHT DEFROST AUTO START don t come on 6 8 9 11 TROUBLE DISPLAY NAME PIN NO MICOM OUTPUT IN PIN NO 3 Display...

Страница 45: ...45 Fig 6 Measurement Point...

Страница 46: ...is opened during operation the Count down timer does not stop CHECK METHOD CHECK METHOD REMEDY NO 1 Check the stage ON OFF of the secondary Replace secondary Interlock switch by resistance measurement...

Страница 47: ...al clock does not operate properly If clock does not keep exact time you must check resistor R11 R17 7 When there is not grill heat When touching START pad oven lamp turns on Fan Motor and turntable r...

Страница 48: ...2 COMPONENT INFORMATION 1 Transistor 2 Diode and Zener Diode 48...

Страница 49: ...49 3 PRINTED CIRCUITS BOARD...

Страница 50: ...50 4 P C B CIRCUIT DIAGRAM...

Страница 51: ...SISTOR KTA1270Y 562Y RA1 RA 87X104J RESISTOR ARRAY RGLD6X104J C4 CCXF1H103Z CAPACITOR CERAMIC HIKF 50V 0 01uF Z C1 3 CBXF1H104Z CAPACITOR CERAMIC HIKF 50V 0 1uF Z EC5 CEXF1H471V CAPACITOR ELECTROLYTIC...

Страница 52: ...GASKET DOOR PP 1 A07 3513100700 HOOK POM 1 A08 3515101300 SPRING HOOK PW1 1 REF No PART CODE PART NAME DESCRIPTION Q TY REMARK 3511706402 DOOR ASSEMBLY KOR 81150S 1 ONLY KOG 281M 3511706422 KOG 81250S...

Страница 53: ...B06 441B655072 SPRING DOOR BUTTON HSWR 1 B07 3516903600 BUTTON DOOR OPEN ABS 1 ONLY KOG 261M 3516903620 ONLY KOG 262M 53 REF No PART CODE PART NAME DESCRIPTION Q TY REMARK PKCPSWTT00 CONTROL PANEL AS...

Страница 54: ...54...

Страница 55: ...1402500 COVER B SBHG T0 8 1 F14 3963820110 MOTOR SHADED POLE 120V 17W MW10XA R01 1 F15 3511800300 FAN PP 30 GLASS 1 F16 7172400811 SCREW TAPTITE TT2 TRS 4X8 MFZN 1 F17 3513001900 HOLDER HV CAPACITOR S...

Страница 56: ...02300 HEATER 1000W 120V 1 F39 2 3513301100 INSULATOR HEATER SPP T0 8 1 F40 3514700900 ROLLER TEFLON 3 F41 3512509200 GUIDE ROLLER PP 1 F42 3517203600 TRAY GLASS 1 ONLY KOG 28XX 3517203500 GLASS 1 ONLY...

Страница 57: ...G261AMU010 DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC FAX 02 364 5588 5305 TEL 02 360 7114 7315 7 PRINTED DATE APR...

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