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Service Manual

Model

:

KOG-

1A0A

Microwave Oven & Grill

May. 2005

S/M No. :

G1A0A9A001

• 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).

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Summary of Contents for KOG-1A0A

Page 1: ...S M No G1A0A9A001 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 ...

Page 2: ...n the interlock monitor door seal and microwave generation and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the owner e 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 3 FOR ...

Page 3: ...oor 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 ove...

Page 4: ...GY OUTPUT 1000W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS W X H X D 539X300X406mm 21 2X16 0X11 8 in CAVITY DIMENSIONS W X H X D 354X228X373mm 13 9X14 7X9 0 in NET WEIGHT APPROX 16 0Kg 35 3lbs TIMER 99min 99sec FUNCTION SELECTIONS MICROWAVE GRILL POWER SELECTIONS 10 LEVELS CAVITY VOLUME 1 1 Cu Ft Specifications are subject to change without notice ...

Page 5: ...5 EXTERNAL VIEW 539 406 300 1 OUTER DIMENSION ...

Page 6: ...hes of cooking foods 5 OVEN LAMP Automatically turns on during oven operating 6 SAFETY INTERLOCK SYSTEM 7 CONTROL PANEL 8 GLASS COOKING TRAY Made of special heat resisant glass The tray must always be in proper position before operating Do not cook food directly on the tray 9 OVEN FRONT PLATE 10 DOOR OPENING BUTTON To open the door push the door opening button When door is closed it will automatic...

Page 7: ...isminuir el tiempo de cocción durante el cocinado 19 Más Función para agregar más tiempo de cocción durante el cocinado 20 Descongelado automático Funciones programadas para descongelar carne pollo o pescado según el peso 21 Botones del cronómetro Se usan para seleccionar el tiempo de cocción y ajustar la hora del reloj 22 M O Boton para cocinar con microondas y establecer el nivel de potencia 23 ...

Page 8: ... 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 a long cord or extension cord is used 1 The marked ...

Page 9: ... 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 decreas...

Page 10: ...ginning 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 du...

Page 11: ...ward 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 NOTE After replacing the door assembly perform a check of correct alignment with the hinge and cavity front plate ...

Page 12: ...AS KOR 1A1G0A 1 A05 3517005800 BARRIER SCREEN I PETP T0 1 1 A06 3512301900 GASKET DOOR PP 1 A07 3513100700 HOOK POM 1 A08 3515101900 SPRING HOOK PW 1 1 1 Remove the gasket door from door plate 2 Remove the barrier screen inner 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 the barrier screen outer fro...

Page 13: ...ge 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 A B NOTE A small gap may be acceptable if the microwave leakage does not exceed 4mW cm2 ...

Page 14: ...from the control panel 6 Remove door open button and button spring from the control panel 7 Reverse the above steps for reassembly REF NO PART CODE PART NAME DESCRIPTION Q TY B01 3518524250 SWITCH MEMBRANE KOG 1A0A9A 1 3518524260 KOG 1A6A9A B02 3516722330 CONTROL PANEL KOG 1A0A9A 1 3516722340 KOG 1A6A9A B03 PKMPMSX540 PCB AS KOG 131A9A11 1 B04 7122401211 SCREW TAPPING T2S TRS 4 12 MFZN 4 B05 35137...

Page 15: ...oor normally closed 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 reasse...

Page 16: ... assembly 3 Pull the fan from the motor shaft 4 Remove two screws which secure the motor shaded pole 5 Remove the motor shaded pole 6 Reverse the above steps for reassembly 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 ...

Page 17: ... 2 Remove the insulater Heater C01 and Heater C02 3 Remove the two screws C05 4 Reverse the above steps for reassembly REF NO PART NAME PART CODE DESCRIPTION Q TY C01 INSULATOR HEATER 3513302200 SPP T0 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 I 3515000600 C...

Page 18: ...ses the button of the secondary interlock switch to bring it under NO condition 3 Adjustment steps a 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 WH WH GY BK RD WH WH BK RD PRIMARY INTERLOCK SWITCH INTERLOCK MONITOR SWITCH SECONDARY INTERLOCK SWITCH FRONT B...

Page 19: ...onnection of the terminals and power cord before check the parts listed below CONDITION CHECK Check continuity of interlock monitor switch with door closed Check continuity of primary interlock switch contact with door partially open until interlock monitor switch contact close Malfunction of interlock monitor switch Shorted contacts of primary interlock switch RESULT Continuity No Continuity Repl...

Page 20: ... Continuity Adjust or replace Check D C voltage being supplied to RELAY RY2 coil Defective touch control circuit 0 V Replace Faulty contacts of RELAY RY2 or open relay coil Approx 15 VDC Replace Display do not shown countdown Malfunction of D O M Switch Replace Check continuity of power supply cord Open power supply cord No Continuity Replace Defective touch control circuit Normal Replace NOTE All...

Page 21: ... body Continuity Defective magnetron Replace Check resistance of primary and secondary coil of high voltage transformer 0 Ω or Defective high voltage transformer Replace Check continuity of magnetron with wires removed No Continuity Defective magnetron Replace Check continuity of filament terminal of high voltage transformer No Continuity Defective high voltage transformer Replace Check D C voltag...

Page 22: ... 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 NOTE Before following the particular steps listed above in the trouble shooting guide for the memb...

Page 23: ...he vessel the load is immediately placed on the center of the shelf which is in the lowest normal position 4 Microwave power is switched on 5 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 The initial and final temperature of water is sel...

Page 24: ...abinet 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 ...

Page 25: ...meter 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 may be read in both directions A normal diode s resistance will be infinite in one direction and sever...

Page 26: ...26 WIRING DIAGRAM ...

Page 27: ...oltage transformer changes in proportion to fluctuation of power source voltage 3 The allowable tolerance of the secondary voltage is within 5 of nominal voltage NOTE Each measure point must be measured with GND points Terminal Voltage 4 7 LOAD AC 12 6 V NO LOAD AC 14 7 V NO CHECK POINT REMARK 1 IC1 PIN 2 21 30 34 5VDC 2 IC1 PIN 35 3 IC1 PIN 31 OR 32 T 16 67ms 60Hz T 250 ns 4MHz NO MEASURE POINT W...

Page 28: ...28 MP1 MP2 Mesure point ...

Page 29: ...ram point 6 Check method 5 When the door is opened during operation the count down timer does not stop refer to Circuit Diagram point 1 Check method 6 When the digital clock does not operate properly refer to Circuit Diagram point 5 If clock does not keep exact time you must check resistor R15 16 zener diode ZD1 POINT A B STATE RELAY 2 ON 5VDC GND RELAY 2 OFF GND 12VDC POINT A B STATE RELAY 1 ON 5...

Page 30: ...30 2 P C B CIRCUIT DIAGRAM ...

Page 31: ...AZ221J 7 16 RESISTOR R8 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 AZ101J 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 4Z510J 1 22 RESISTOR R23 1 6W 4 7K 5 RD AZ472J 1 23 REGULATOR VL1 MC7905C 1MC7905C 1 24 TRANSISTOR Q1 5 8 11 KRA 106M TZRA106M 9 25 TRANSISTOR Q6 KT...

Page 32: ...32 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 ...

Page 33: ... MW10XA M01 1 F12 3512517000 GUIDE WIND PP 1 F13 3511800300 FAN PP GF30 1 F14 3518002900 MAGNETRON 2M218J F P 1 F15 3516004000 SPECIAL SCREW T2 BOLT FLANGE 5X12 DACRO 1 F16 7122400811 SCREW TAPTITE T2S TRS 4 8 MFZN 1 F17 3513003200 HOLDER HV CAPACITOR SECC T0 6 1 F18 3518302201 CAPACITOR HV 2100VAC 0 98UF 187 1 F19 3518400400 DIODE HV HVR 1X 3AB 12KV 187 1 F20 3518119510 TRANS HV DW R95A0 1AT 1 F2...

Page 34: ...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 7S627W50X1 NUT HEX NUT FLANGE M5X0 8P MFZN 2 F44 3514701510 ROLLER TEFLON 3 F45 3512502310 GUIDE ROLLER XAREC 1 F46 441X335A10 TRAY GLASS 1 F47 3517209600 TRAY RACK AS KOG 1A4H9S 100MM 1 F48 3518904900 THERMOSTAT OFF 90...

Page 35: ...S M NO G1A0A9A001 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 May 2005 ...

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