Daewoo KOR-6L7B1V Service Manual
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Daewoo KOR-6L7B1V Service Manual

Daewoo KOR-6L7B1V Service Manual

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S/M No. :
Service Manual
Microwave Oven
Model: KOR-6L7B1V
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).
R6L7B1V001
Jun. 2012

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Summary of Contents for Daewoo KOR-6L7B1V

  • Page 1 R6L7B1V001 S/M No. : Service Manual Microwave Oven Model: KOR-6L7B1V 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 CAUTION This device is to be Serviced only by Properly Qualified Service Personel. 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, 60Hz SINGLE PHASE WITH GROUNDING INPUT POWER 950 W MICROWAVE ENERGY OUTPUT 600 W FREQUENCY 2,450MHz OUTSIDE DIMENSIONS (W 17.6 x 10.6 x 12.5 in. CAVITY DIMENSIONS (W 11.6 x 8.3 x 11.9 in. CAVITY VOLUME 0.7 cu.ft NET WEIGHT APPROX.

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION 17.6 12.5...

  • Page 6: Features Diagram

    2. FEATURES DIAGRAM 1 Door latch - When the door is closed, it will 7 Roller guide - This must always be used for cooking automatically shut off. If the door is opened while the together with the glass cooking tray. oven is operating, the magnetron will automatically 8 Glass cooking tray - Made of special heat resistant shut off.

  • Page 7: Control Panel

    3. CONTROL PANEL MENÚ AUTO COCCIÓN 1. Palomitas 2. Pan AUTO 3. Sopa COCCIÓN 4. Papas Cocidas 5. Vegetales Frescos 6. Vegetales Congelados Descong. Potencia Reloj INICIO PARAR Borrar +30seg. 1 DISPLAY - Cooking time, power level, indicators and 5 CLOCK - Used to set the clock. current time are displayed.

  • Page 8: Installation

    INSTALLATION 1. Steady, flat location. This microwave oven should be set on a steady, flat surface. 2. Leave space behind and side. All air vents should be kept clear. If all vents are covered during operation, the oven may be overheated and, eventually, cause oven failure.

  • 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 : 3511730190 REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK 3512211140 FRAME DOOR HIPS SG-970, HG-1760H 3517007300 BARRIER-SCREEN*0 PET T0.125 3515204120 STOPPER HINGE *T AS KOR-6L0B1A 3511706130 DOOR painting AS KOR-6L0B1A 3517003700 BARRIER-SCREEN *I POLYESTER T0.1 3512302700...
  • 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 surface.
  • Page 14 5. To remove control panel parts. C/PANEL ASSEMBLY : PKCPSWZAF0 REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK 3518573690 SWITCH MEMBRANE KOR-6L7B3A74 EMERSON SMOG 3516741150 CONTROL-PANEL HIPS SG-970 HG-1760H PKMPMSFL90 PCB MAIN MANUAL AS KOR-6L3B1A27(POPCORN) 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 3513702700 LEVER DOOR OPEN 441G430171...
  • 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. CONDITION : DOOR CLOSED CONDITION : DOOR OPEN (1) Primary interlock switch...

  • 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 Outlet has Check continuity of magnetron Continuity magnetron proper voltage Fuse does not Replace blow. Open power Check continuity of Continuity power supply cord supply cord Replace Normal Defective touch control circuit Replace Display do not shown Malfunction of countdown...
  • Page 20 (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 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. A cylindrical container of borosilicate glass is used for the test. It has a maximum thickness of 3mm, an external diameter of approximately 190mm and a height of approximately 90mm.

  • 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 does not rotate, but cook indicator in display comes on. - Check method POINT STATE RELAY 2 ON 5V DC RELAY 2 OFF 15V DC 2) When touching START pad, oven lamp turns on.

  • Page 29: Pcb Circuit Diagram

    2. PCB CIRCUIT DIAGRAM...

  • Page 30: Pcb Location No

    3. PCB LOCATION NO. NAME SYMBOL SPECIFICATION PART CODE Q’TY BUZZER BM-20K 3515600100 CAPACITOR CERAMIC C1,2,3,8,9 50V 0.1uF Z AXIAL CCZF1H104Z CAPACITOR CERAMIC C4,5,6,7 50V 1000pF Z AXIAL CCZB1H102K CAPACITOR ELECTRO 50V RS 10uF(5x11) CEXE1H100A CAPACITOR ELECTRO 50V RSS 220uF(10x16) CEXF1H221V CAPACITOR ELECTRO 25V RSS 1000uF(13x20)

  • 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 REF NO. PART CODE PART NAME DESCRIPTION Q'TY 3511730190 DOOR AS KOR-6L7B3S PKCPSWZAF0 CONTROL-PANEL AS KOR-6L7B1V 3510808410 CABINET AS KOR-6L0B1A 3516117410 CAVITY AS KOR-6L0B1A 3516004100 SPECIAL SCREW T1 TRS LR4 POLE 4X10 MFZN 7122401211 SCREW TAPPING T2S TRS 4X12 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: Jun. 2012...
  • Page 34 ABOUT THIS MANUAL ABOUT THIS MANUAL ! ! " " # # " " $ $ % % & & ' ' ( ( ) ) * * + + " " ! ! ) ) , , & & " " % % ' ' - - ./ 012 345 678 9:;<...

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