Daewoo KOG-1A0A9A Service Manual
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Daewoo KOG-1A0A9A Service Manual

Daewoo KOG-1A0A9A Service Manual

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DAEWOO ELECTRONICS CORP.
686, AHYEON-DONG MAPO-GU SEOUL, KOREA
C.P.O. BOX 8003 SEOUL, KOREA
TELEX: DWELEC K28177-8
CABLE: "DAEWOOELEC"
S/M NO. :
PRINTED DATE: May. 2005

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Summary of Contents for Daewoo KOG-1A0A9A

  • Page 1 DAEWOO ELECTRONICS CORP. 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” S/M NO. : PRINTED DATE: May. 2005...

  • Page 2: Microwave Oven

    S/M No. : Service Manual Microwave Oven Model: KOG-1A0A9A KOG-1A6A9A 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 May.

  • Page 3: Table Of Contents

    PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be operated with the door open. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other 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.

  • Page 4: Safety And Precautions

    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.

  • Page 5: Specifications

    SPECIFICATIONS MODEL KOG-1A0A9A, 1A6A9A POWER SUPPLY 120V~60H , SINGLE PHASE WITH EARTHING POWER MICROWAVE 1400W CONSUMPTION GRILL 1150W MICROWAVE ENERGY 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.)

  • Page 6: External View

    EXTERNAL VIEW 1. OUTER DIMENSION...

  • Page 7: Feature Diagram

    2. FEATURE DIAGRAM 1. DOOR SEAL Door seal maintains the microwave within the oven cavity and prevents microwave leakage. 2. 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.

  • Page 8: Control Panel

    3. CONTROL PANEL M/W Defrost Grill Timer/ lb 1. Bread 2. Soup Auto 3. Baked Potato Cook 4. Fresh Vegetable 5. Frozen Vegetable Grill Defrost Dish Pasta Warmer LESS MORE Frozen Beverage Pizza Auto Defrost Fish Poultry Meat Kitchen Clock Timer Stop/Clear Start/Speedy cook...

  • Page 9: Installation

    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.

  • Page 10: Operations And Functions

    OPERATIONS AND FUNCTIONS 1. Connect the main lead to an electrical outlet. 2. After placing the food in a suitable container, open the oven door and put it on the glass tray. The glass tray must always be in place during cooking. 3.

  • Page 11: Disassembly And Assembly

    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.
  • Page 12 1. To remove cabinet 1) Remove three 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 reassembly.
  • Page 13 3. To remove door parts. REF NO. PART CODE PART NAME DESCRIPTION Q’TY 3512204330 KOG-1A0A9A FRAME DOOR 3512204340 KOG-1A6A9A 3517005900 BARRIER SCREEN *O PETP T0.25 3515202900 STOPPER HINGE *T AS KOR-121M0A 3511711300 DOOR PAINTING AS KOR-1A1G0A 3517005800 BARRIER SCREEN *I PETP T0.1...
  • Page 14 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. •...
  • Page 15 5. To remove control panel parts. REF NO. PART CODE PART NAME DESCRIPTION Q’TY 3518524250 KOG-1A0A9A SWITCH MEMBRANE 3518524260 KOG-1A6A9A 3516722330 KOG-1A0A9A CONTROL-PANEL 3516722340 KOG-1A6A9A PKMPMSX540 PCB AS KOG-131A9A11 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN 3513702800 KOG-1A0A9A LEVER DOOR OPEN...
  • Page 16 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.
  • Page 17 9. To remove wind guide assembly. 1) Remove a screw which secure the wind guide assembly. 2) Draw forward the wind guide 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.
  • Page 18 11. To remove insulator Heater assembly. 1) Remove the HEX NUT (F09). 2) Remove the two HEX NUTS (F43). 3) Remove the insulator Heater assembly (C00). 4) Reverse the above steps for reassembly. REF NO. PART NAME PART CODE DESCRIPTION Q’TY INSULATOR HEATER 3513302200...

  • Page 19: Interlock Mechanism And Adjustment

    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 operation, and thus to perfectly prevent the danger resulting from the leakage of microwave. DOOR LATCH FRONT-PLATE PRIMARY...

  • Page 20: Trouble Shooting Guide

    TROUBLE SHOOTING GUIDE Following the procedure below to check if the oven is defective or not. 1) Check grounding before trouble checking. 2) Be careful of the high voltage circuit. 3) Discharge the high voltage capacitor. 4) When checking the continuity of the switches, fuse or high voltage tranformer, disconnect one load wire from these parts and check continuity with the AC plug removed.
  • Page 21 CONDITION CHECK RESULT CAUSE REMEDY Replace Defective Outlet has Check continuity of magnetron Continuity magnetron proper voltage Fuse does not Replace blow. Open power Check continuity of Continuity supply cord power supply cord Replace Normal Defective touch control circuit Replace Malfunction of Display do not shown countdown...
  • Page 22 (TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITION CHECK RESULT CAUSE REMEDY Continuity Replace Check continuity of high Defective high microwave voltage capacitor terminals voltage oscillation with wires removed transformer Continuity in Replace Check continuity of high voltage Defective high backward rectifier in forward and backward...
  • Page 23 (TROUBLE 4) The following visual conditions indicate a probable defective touch control circuit or membrane switch assembly 1. Incomplete segments, 1) Segments missing. 2) Partical segments missing. 3) Digit flickering other than normal display slight flickering. 4) " :0" does not display when power is on. 2.

  • Page 24: Mesurement And Test

    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. 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 ±...

  • Page 25: Microwave Radiation Test

    2. MICROWAVE RADIATION TEST CAUTION 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.

  • Page 26: Component Test Procedure

    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.

  • Page 27: Wiring Diagram

    WIRING DIAGRAM...

  • Page 28: Printed Circuit Board

    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 AC 12.6 V AC 14.7 V NOTE 1.
  • Page 29 Mesure point...
  • Page 30 3. When there is no microwave oscillation 1) When touching START pad, oven lamp does not turn on. Fan motor does not rotate, but cook indicator in display comes on. Cause : RELAY 2 does not operate. refer to Circuit Diagram (point 3) - Check method POINT STATE...

  • Page 31: Circuit Diagram

    2. P.C.B. CIRCUIT DIAGRAM...

  • Page 32: Location No

    3. P.C.B. LOCATION NO NAME SYMBOL SPECIFICATION PART CODE Q’TY BUZZER BM-20K 3515600100 C ARRAY 7P(6) 102 M 50V CN6XB-102M CAPACITOR ELEC 50V RS 1µF CEXE1H109A CPAPCITOR ELEC 25V RSS 1000µF CEXF1E102V CONNECTOR WAFER YW396-02AV 3519150520 CONNECTOR WAFFR YW396-05AV 3519150510 CONNECTOR WAFER FCZ254-11 441M367160...

  • Page 33: Exploded View And Parts List

    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 34 REF NO PART CODE PART NAME DESCRIPTION Q'TY 3511711230 KOG-1A0A9A DOOR AS 3511711240 KOG-1A6A9A PKCPSWX820 KOG-1A0A9A CONTROL PANEL AS PKCPSWAP40 KOG-1A6A9A 3513302410 INSULATOR HEATER AS KOG-211M0A 3510805500 CABINET AS KOR-1A1G0A 3516004100 SPECIAL SCREW T1 TRS LR4 POLE 4X10 SE MFZN...
  • Page 35 REF NO PART CODE PART NAME DESCRIPTION Q'TY 3513601500 LAMP BL 125V 25W T25 C5A H187 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 3966820200 MOTOR SYNCRO 120V 2W GM-16-12F17 3518905400 THERMOSTAT OFF:90 ON:60 H#187 NB 3513003410 HOLDER THERMOSTAT 7272400811 SPECIAL TAPTITE TT3 TRS 4X8 MFZN 3511405100 COVER WAVE GUIDE...
  • Page 36 ABOUT THIS MANUAL ABOUT THIS MANUAL...

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