Daewoo KOR-6L3B3S Service Manual
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Daewoo KOR-6L3B3S Service Manual

Daewoo KOR-6L3B3S Service Manual

Microwave oven
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S/M No. :
Service Manual

Microwave Oven

Model: KOR-6L3B3S
KOR-6L3B3W
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).
Dec. 2010

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Summary of Contents for Daewoo KOR-6L3B3S

  • Page 1: Microwave Oven

    S/M No. : Service Manual Microwave Oven Model: KOR-6L3B3S KOR-6L3B3W 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 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 220~240V AC, 50Hz SINGLE PHASE WITH POWER SUPPLY EARTHING INPUT POWER 1000 W MICROWAVE ENERGY OUTPUT 700 W FREQUENCY 2,450 MHz OUTSIDE DIMENSIONS (W x H x D) 446 x 270 x 319 mm CAVITY DIMENSIONS (W x H x D) 295 x 219 x 303 mm CAVITY VOLUME 20 L...

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION...

  • Page 6: Features Diagram

    2. FEATURES DIAGRAM 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 surfaces prevent microwaves escaping from the oven cavity. 3 Oven cavity 4 Control panel 5 Door open button - To open the door push the door open button.

  • Page 7: Control Panel

    3. CONTROL PANEL 1 DISPLAY - Cooking time, power level, indicators and 6 ONE TOUCH COOK - Used to cook or reheat specif- the current time are displayed. ic quantities of food. 2 AUTO COOK - Used to cook or reheat many of 7 TIME SET PAD - Used to set the cooking time and favorite food.

  • 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: Operations And Functions

    OPERATIONS AND FUNCTIONS 11. Connect the mains lead to an electrical outlet. 12. 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. 13.

  • Page 10: Disassembly And Assembly

    DISASSEMBLY AND ASSEMBLY Cautions to be observed when troubleshooting. 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. You are asked to observe the following precautions carefully.
  • Page 11 1. To remove cabinet 1) Remove four screws on cabinet back. 2) Pull 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 12 3. To remove door parts. DOOR ASSEMBLY : 3511729900 REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK 3512211100 FRAME DOOR ABS SG-0760D, SG-175 3517011010 BARRIER-SCREEN*0 TEMP GLASS T3.2 3515204120 STOPPER HINGE *T AS KOR-6L0B1A 3511706130 DOOR painting AS KOR-6L0B1A 3517003700 BARRIER-SCREEN *I POLYESTER T0.1...
  • Page 13 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 the stopper hinge top, and then push the door to contact the door seal to the oven front sur- face.
  • Page 14 5. To remove control panel parts. C/PANEL ASSEMBLY : PKCPSWFLF0(KOR-6L3B3S) PKCPSWFLF1(KOR-6L3B3W) REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK 3518572820 SWITCH MEMBRANE KOR-6L3B3S 3516738920 CONTROL-PANEL ABS SG-0760D SG-175 PKMPMSFL10 PCB MAIN MANUAL AS KOR-6L0B3S(KOR-6L3B3S) PKMPMSFLD0 KOR-6L0B3W(KOR-6L3B3W) 7122401211 SCREW TAPPING...
  • Page 15 6. To remove high voltage capacitor. 1) Remove the 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 wind guide assembly. 1) Remove the screw for earthing. 2) Remove the noise filter from the wind guide. 3) Remove the 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: 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. (1) Primary interlock switch When the door is closed, the hook locks the oven door.

  • Page 18: Troubleshooting Guide

    TROUBLESHOOTING 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 transformer, disconnect one lead wire from these parts and check continuity with the AC plug removed.
  • Page 19 CONDITION CHECK RESULT CAUSE REMEDY Replace Defective mag- Outlet has Check continuity of magnetron Continuity netron proper volt- age Fuse does not Replace Defective mag- blow. Check continuity of Continuity netron noise filter board Replace Open power sup- Check continuity of Continuity power supply cord ply cord...
  • Page 20 (TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITION CHECK RESULT CAUSE REMEDY Continuity microwave Check continuity of high oscillation voltage fuse Replace high voltage fuse Continuity Replace Check continuity of high Defective high voltage capacitor terminals voltage trans- with wires removed former Continuity in...
  • Page 21 (TROUBLE 4) The following visual conditions indicate a probable defective touch control circuit 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 22: Measurement And Test

    MEASUREMENT AND TEST 1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT Microwave output power can be checked by indirectly measuring 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±5cc of potable water.

  • Page 23: 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 24: 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 25: Wiring Diagram

    WIRING DIAGRAM...

  • Page 26: 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 (4,5)-6 or (7,8)-6 AC 14 V AC 17 V NOTE :...
  • Page 27 Measure Point...
  • Page 28 3. When there is no microwave oscillation 1) When touching START pad, oven lamp does not turn on. Fan motor do not rotate, but cook indicator in display comes on. - Check method POINT STATE RELAY 2 ON 5VDC RELAY 2 OFF 15VDC 2) When touching START pad, oven lamp turns on.

  • Page 29: Pcb Circuit Diagram

    2. PCB CIRCUIT DIAGRAM...

  • Page 30: Location No

    KTC3198GR AUTO TZTC3198GR TRANSISTOR Q1~4 KRA106M AUTO TZRA106M-- TRANSISTOR Q9,10 KRC106M AUTO TZRC106M-- TRANS POWER LVT1 DMR-63KFS EU (KOR-6L3B3S) 5EPK035306 DMR-63KFS ( KOR-6L3B3W) 5EPV035306 WIRE COPPER 7.5mm J1,2,4,5,7,8 1/0.52 TIN COATING 85801052GY WIRE COPPER 10mm J3,6, 1/0.52 TIN COATING 85801052GY...

  • Page 31: 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 32 So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr). REF. NO PART CODE PART NAME DESCRIPTION Q'TY 3511729900 DOOR AS KQG-6L353S PKCPSWFLF0 CONTROL-PANEL AS KOR-6L3B3S PKCPSWFLF1 KOR-6L3B3W 3510808410 CABINET AS KOR-6L0B1A 3516117410 CAVITY AS KOR-6L0B1A 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN...
  • Page 33 DAEWOO ELECTRONICS CORP. 1-2, Jeo-dong 1(il)-ga, Jung-gu, Seoul, Korea C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” S/M NO. : PRINTED DATE: Dec. 2010...
  • Page 34 V V I I S S I I O O N N C C R R E E A A T T I I V V E E , , I I N N C C . . 서울 종로구 통의동 6 번지 이룸빌딩 4 층 담 당 김영진 님 M O D E L KOR-6L3B3S,W (S/M) 접 수 2010.12.16 1차 2차 일...

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