Daewoo KOG-867T Service Manual
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Daewoo KOG-867T Service Manual

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S/M No. : G867T9A001
Service Manual
Microwave Oven & Toaster
:
KOG-867T
Model
• 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).
Sep. 2003

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  • Page 1 S/M No. : G867T9A001 Service Manual Microwave Oven & Toaster KOG-867T Model • 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: 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 3: Safety Andprecautions

    SAFETY ANDPRECAUTIONS 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 4: Specifications

    SPECIFICATIONS POWER SUPPLY 120V AC 60 Hz SINGLE PHASE WITH EARTHING POWER CONSUMPTION 1.4 KW OUTPUT POWER 1000 W MICROWAVE FREQUENCY 2450 MHz OVEN TIMER 59 min. 99 sec. POWER LEVELS 10 LEVELS CAVITY DIMENSIONS 320 x 244 x 338 mm (12.6 x 9.6 x 13.3 inch) CAVITY VOLUME 0.9 Cu.ft TOASTER...

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION...

  • Page 6: Feature Diagram

    2. FEATURE DIAGRAM MICROWAVE OVEN TOASTER 1. DOOR LATCH When the door is closed it will automatically shut off. If the door is opened while the oven is operating, the magnetron will automatically shut off. 2. DOOR SEAL The door seal maintains the microwave within the oven cavity and prevents microwave leakage. 3.

  • Page 7: Control Panel

    3. CONTROL PANEL 1. TIME SET PAD - Used to set the cooking time and the present time. 2. DISPLAY - Cooking time, power level, indicators and present time are displayed. 3. TOAST BREAD - Used to reheat bread. 4. TOAST BAGEL - Used to reheat bagel. 5.

  • Page 8: Installation

    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. 6. Examine the oven after unpacking for any damage such as: A misaligned door, broken door or a dent in cavity.

  • Page 9: Operation Procedure(Microwave Oven)

    OPERATION PROCEDURE(MICROWAVE OVEN) This section includes useful information about Microwave oven operation. 1. Plug power supply cord into a standard 3-pronged 20Amp, 120V AC 60Hz poweroutput. 2. After placing the food in a suitable container, open the oven door and put it on the glass tray. The glass tray and roller guide must always be in place during cooking.

  • Page 10: Important

    IMPORTANT Before using the toaster for the first time, operate the toaster without bread in order to burn off residues on the heating elements. You will notice an odor that is characteristics of new heating elements. This is normal and will soon disappear.

  • Page 11: Operation Procedure(Toaster)

    OPERATION PROCEDURE(TOASTER) This section includes useful information about toaster operation. 1. Plug power supply cord into a standard 3-pronged 20Amp, 120V AC 60Hz poweroutput. 2. Put 2 pieces of toast bread or bagel between the toaster guides (wire rack) of the toaster drawer. 3.

  • Page 12: 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 13 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 14  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. To remove door parts. Door As : 3511724200 REF NO.
  • Page 15 4. Method to reduce the gap between the door seal and the oven front surface. (1) To reduce gap located on part ‘A’. • Loosen the screw on stopper hinge top, and then push the door to contact the door seal to oven front surface. •...
  • Page 16 5. To take off the toaster assembly. (1) Remove four screws on the toaster assembly. (2) Lift up the toaster assembly and pull it out. (3) Reverse the above for assembly. NOTE : To assemble the toaster assembly, push two taps on the side of the toaster front plate into two rectomgular holes of the front plate securely.
  • Page 17  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) 6. To remove control panel parts. REF NO.
  • Page 18 7. 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. 8.
  • Page 19 10. 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 20: 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. Toast Panel Top WH/BK RD/RD...

  • Page 21: 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 22 CONDITION CHECK RESULT CAUSE REMEDY Replace Defective Outlet has Check continuity of magnetron Continuity magnetron proper voltage Fuse does not Replace blow. Defective line Check continuity of Continuity filter board noise filter board Replace Check continuity of Open power Continuity power supply cord supply cord Adjust...
  • Page 23 (TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITION CHECK RESULT CAUSE REMEDY Check continuity of Replace Defective continuity microwave high voltage fuse high voltage oscillation fuse No microwave oscillation Continuity Check continuity of Defective high voltage capacitor terminals high voltage with wires removed transformer...
  • Page 24 (TROUBLE 4) Toaster heater is not heated; bread or bagel will not toast. CONDITION CHECK RESULT CAUSE REMEDY Adjust or Check continuity of Toaster Malfunction of replace continuity spring flat heater is spring flat not heated. Adjust or Check continuity of Malfunction of replace continuity...
  • Page 25 (TROUBLE 6) 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 26: Measurement 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 27: 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 28: 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 29: Wiring Diagram

    WIRING DIAGRAM...

  • Page 30: 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 14.5 V NOTE 1. Refer to Ciruit Diagram (point 4). 2.
  • Page 31 Mesure point...
  • Page 32 3. When there is no microwave oscillation 1) When touching START pad, oven lamp turns on and turntable rotates. but cook indicator in display comes on. Cause : RELAY 4 does not operate. refer to Circuit Diagram (point 3) - Check method POINT STATE RELAY 4 ON...

  • Page 33: Pcb Circuit Diagram

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

  • Page 34: Location No

     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 NO NAME SYMBOL SPECIFICATION...

  • Page 35: 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 36 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). PART CODE PART NAME DESCRIPTION Q'TY...
  • Page 37  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) PART CODE PART NAME DESCRIPTION Q'TY...

  • Page 38: Toast Assembly (C00)

    4. TOAST ASSEMBLY (C00)
  • Page 39  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) PART CODE PART NAME DESCRIPTION Q'TY...
  • Page 40 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: Sep. 2003 S/M No. : G867T9A001...

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