Daewoo KOG-37DP0S Service Manual
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Daewoo KOG-37DP0S Service Manual

Daewoo KOG-37DP0S Service Manual

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S/M No. : G37DP0S001
Service Manual

Microwave Oven

Model : KOG-37DP0S
KOG-37FP0S
DAEWOO ELECTRONICS CO., LTD.

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Summary of Contents for Daewoo KOG-37DP0S

  • Page 1: Microwave Oven

    S/M No. : G37DP0S001 Service Manual Microwave Oven Model : KOG-37DP0S KOG-37FP0S DAEWOO ELECTRONICS CO., LTD.

  • 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 micro-wave source, and make repairs as 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 And Precautions

    SAFETY AND PRECAUTIONS 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.

  • Page 4: Specifications

    SPECIFICATIONS MODEL KOG-37DP0S POWER SUPPLY 230V-50Hz, SINGLE PHASE WITH EARTHING MICROWAVE 1200W POWER GRILL 1050W CONSUMPTION COMBINATION 2200W MICROWAVE ENERGY OUTPUT 800W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 465x279x342mm (18.3x11.0x13.5 in.) CAVITY DIMENSIONS (W X H X D) 290x220x306mm (11.4x8.7x12.0 in.)

  • Page 5: External View

    EXTERNAL VIEWS 1. OUTER DIMENSION (1) KOG-37DP0S (2) KOG-37FP0S...

  • Page 6: Feature Diagram

    2. FEATURE DIAGRAM 1. Door seal - Door seal maintains the microwave energy 9. Roller guide - This must always be used for cooking within the oven cavity and prevents microwave together with the glass cooking tray. leakage. 10. Glass cooking tray - Made of special heat resistant 2.

  • Page 7: Control Panel

    3. CONTROL PANEL Auto Def. Grill Combi Hight Low Warm Timer KOG-37DP Frozen Chicken Croissant Pizza Piece WEIGHT 1. Small Piece 2. Big Piece Combi Grill Grill Combi Kitchen Clock Timer 10m. 10s. Stop/Clear Start 13. Display - Cooking time, power level, indicators and 19.

  • 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 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 And Functions

    OPERATIONS AND FUNCTIONS 1. Connect the mains lead to an electrical socket-outlet. 2. After placing the food in a suitable utensil, open the oven door and put it on the glass turntable, Glass turntable must always be in place during cooking. 3.

  • Page 10: Disassembly And Assembly

    DISASSEMBLY AND ASSEMBLY Cautions to be observed when trouble shooting. Unlike many other appliances, the microwave oven is a high-voltage, high-current equipment. It is completely safety during normal operation. However, carelessness in servicing the oven can result in an electric shock or possible danger from a short circuit.
  • Page 11 1. To remove cabinet. 1) Remove three screws on cabinet back. 2) Push the cabinet backward. 2. To remove door assembly. 1) Remove a screw which secure the stopper hinge top. 2) Remove the door assembly from top plate of cavity 3) Reverse the above for reassembly.
  • Page 12 3. To remove door parts DOOR ASSEMBLY KOG-37DP0S: 3511714420 KOG-37FP0S: 3511714450 REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3512203880 FRAME DOOR PP SI83C KOG-37DP 3512205200 FRAME DOOR PP SI83C KOG-37FP 3517007300 BARRIER-SCREEN*0 PET T0.125 3515204100 STOPPER SINGE *T AS...
  • Page 13 (1) Remove the gasket door from door painting assembly. (2) Remove the door frame from door painting assembly. (3) Remove the stopper hinge top from door painting assembly. (4) Remove the spring and the hook. (5) Remove the barrier screen outer from door frame. (6) Reverse the above steps for reassembly.
  • Page 14 5. To remove control panel parts. CONTROL-PANEL ASSEMBLY KOG-37DP0S: 3516721640 KOG-37FP0S: 3516721650 REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3518521670 SWITCH MEMBREANE KOG-37DP0S KOG-37DP 3518520970 SWITCH MEMBRANE KOG-37FP0S KOG-37FP 3516725300 CONTROL PANEL ABS SG-0760D, SG-175 KOG-37DP 3516725350 CONTROL PANEL...
  • Page 15 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. High voltage circuit wiring 7.
  • Page 16 8. To remove fan motor assembly. (1) Remove a screws for earthing (2) Remove the noise filter from the wind guide. (3) Remove a screw which secure the wind guide assembly. (4) Draw forward the wind guide assembly. (5) Pull the fan from the motor shaft. (6) Remove two screws which secure the motor shaded pole.
  • Page 17 10. To remove tray motor. (1) Remove the coupler in the cavity. (2) Turn the set upside down. (3) Cut the tray motor cover part from the base plate. (4) Remove the tray motor cover. (5) Remove a screw which secure the tray motor. (6) Remove the tray motor.
  • Page 18 12. To remove heater parts. REF.NO PART CODE PART NAME DESCRIPTION REMARK 7392500008 NUT HEX 6N-2-5 SUS 3515000600 SPACER INSULATOR *I C3771BD 3513301100 INSULATOR HEATER SPP T0.8 3512803400 HEATER 230V 1000W 1R67994001 7002500613 SCREW MACHINE TRS 5X6 MFCR 7002400413 SCREW MACHINE TRS 4X4 MFCR 17 17...

  • 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.

  • Page 20: Trouble Shooting Guide

    TROUBLE SHOOTING GUIDE Following the procedure below to check if the oven is defective or not. 1) Check earthing 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 transformer, disconnect one lead 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. Defective line Check continuity of Continuity filter board noise filter board Replace Open power Check continuity of Continuity power supply cord supply cord Replace...
  • Page 22 (TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITION CHECK RESULT CAUSE REMEDY Check continuity of high microwave Continuity voltage fuse oscillation Replace high voltage fuse Continuity Replace Check continuity if high Defective high voltage capacitor terminals voltage with wires removed transformer Continuity in...
  • Page 23 (TROUBLE 4) The following visual conditions inditions 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) " 88:88" does not display when power is on. 2.

  • Page 24: 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 100 ±...

  • 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: 230V / Frequency: 50Hz Terminal Voltage LOAD NO LOAD 6- 4, 7 AC 12.6 V AC 14.7 V NOTE 1.
  • Page 29 Mesurement point...
  • Page 30 3. When there is no microwave oscillation 3. When there is no microwave oscillation 3. When there is no microwave oscillation 3. When there is no microwave oscillation 1) When touching START pad, oven lamp does not turn on. 1) When touching START pad, oven lamp does not turn on. 1) When touching START pad, oven lamp does not turn on.

  • Page 31: Circuit Diagram

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

  • Page 32: Location No

    3. P.C.B. LOCATION NO (1) KOG-37DP0S / KOG-37FP0S NAME SYMBOL SPECIFICATION PART CODE Q'TY BUZZER BM-20K 3515600100 C ARRAY 6P(5) 1000PF M 50V CN5XB-102M CAPACITOR ELEC RSS 100MF 16V CEXF1C101V CAPACITOR ELEC 25V RSS 1000MF CEXF1E102V CONNECTOR WAFER YW396-02V 3519150520...

  • 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 (1) KOG-37DP0S / KOG-37FP0S REF NO PART CODE PART NAME DESCRIPTION Q'TY DOOR AS Refer to disassembly and assembly CONTROL PANEL AS Refer to disassembly and assembly 3513302700 INSULATOR HEATER AS Refer to disassembly and assembly 3510805300 CABINET AS PCM T0.5...
  • Page 35 REF NO PART CODE PART NAME DESCRIPTION Q'TY 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN 3512100900 FOOT PP DASF-130 7272400811 TAPTITE SCREW TT3 TRS 4X8 MFZN 3515201101 STOPPER HINGE *U SCP-1 T2.5 4415A17352 SW MICRO VP-533A-OF SPNO #187 200G 4415A66910 SW MICRO VP-531A-OF/SZM-V16-FA-61 4415A17352...
  • Page 36 DAEWOO ELECTRONICS CO., LTD. 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” PRINTED DATE: Jul. 2001...

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