DAEWOO ELECTRONICS KOR-4A170S Service Manual
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DAEWOO ELECTRONICS KOR-4A170S Service Manual

DAEWOO ELECTRONICS KOR-4A170S Service Manual

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S/M No. : OR4A170S001
Service Manual
Microwave Oven
Model: KOR-4A170S
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).
Aug. 2010

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Summary of Contents for DAEWOO ELECTRONICS KOR-4A170S

  • Page 1 S/M No. : OR4A170S001 Service Manual Microwave Oven Model: KOR-4A170S 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 230V AC, 50Hz SINGLE PHASE WITH EARTHING INPUT POWER 900 W MICROWAVE ENERGY OUTPUT 500 W FREQUENCY 2,450MHz OUTSIDE DIMENSIONS (W 424 x 223 x 317 mm CAVITY DIMENSIONS (W 275 x 178 x 297 mm CAVITY VOLUME 15 L NET WEIGHT APPROX.

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION...

  • Page 6: Features Diagram

    2. FEATURES DIAGRAM e 0 q 1 Door latch - When the door is closed, it will 7 Glass cooking tray - Made of special heat resistant automatically shut off. If the door is opened while the glass. The tray must always be in proper position oven is operating, the magnetron will automatically before operating.

  • Page 7: 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 failure.

  • Page 8: Operations And Functions

    OPERATIONS AND FUNCTIONS 1. Connect the mains lead to an electrical outlet. NOTE 2. After placing the food in a suitable container, open the oven When setting timer for less than 10 door and put it on the glass tray. The glass tray must always be minutes, turn the timer past 10 minutes in place during cooking.

  • Page 9: 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. You are asked to observe the following precautions carefully.
  • Page 10 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 11 3. To remove door parts. REF No. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3511730530 DOOR AS KOR-4A170S 3512211430 FRAME DOOR HIPS SG-970 HG-1760H 3512607900 HANDLE DOOR ABS SG-0760D SG-175 3517011400 BARRIER SCREEN *O TEMP GLASS T3.2 3515205620 STOPPER HINGE *T AS...
  • Page 12 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 13 5. To remove control panel parts. REF No. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3516740480 CONTROL-PANEL AS KOR-4A170S NON EC 3513412500 KNOB VPC ABS SG-0760D SG-175 3511620800 DECORATOR KNOB ABS SG-0760D SG-175 3516740470 CONTROL-PANEL HIPS SG-970 HG-1760H 3517413700 COUPLER VPC...
  • Page 14 6. To remove guide wind parts. GUIDE WIND ASSEMBLY : 3512530430 REF No. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3512530430 GUIDE WIND AS KOR-4A070S 3512530410 GUIDE WIND 3963513100 MOTOR SHADED POLE 230V 17W OEM-10DWC2-A07 7121402511 SCREW TAPPING T2S PAN 4X25 MFZN 3511800300 PP+30%GLASS 3518608300...
  • Page 15 7. 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 8.
  • Page 16 9. 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. Hook Primary interlock switch RD/WH...

  • 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 Does the fan motor work when you shut the door and turn the timer? Does the oven lamp light? Replace or repair oven lamp, Does the turntable turn? turntable motor. Normal reading should be approx. 0 If microwave do not Check continuity No Continuity Continuity...

  • Page 20: 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 21: 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 22: 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 23: Wiring Diagram

    WIRING DIAGRAM...

  • Page 24: 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. GUIDE WIND ASSEMBLY Refer to Disassembly and assembly. 4. TOTAL ASSEMBLY...
  • Page 25 REF. NO PART CODE PART NAME DESCRIPTION Q'TY 3511730530 DOOR AS KOR-4A170S 3516740480 CONTROL-PANEL AS KOR-4A170S NON EC 3510811310 CABINET AS KOR-4A070S 3516121600 CAVITY AS KOR-4A070S 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN...
  • Page 26 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. : OR4A170S001 PRINTED DATE: Aug. 2010...
  • Page 27 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 이재혁 님 M O D E L KOR-4A170S (S/M) 접 수 2010.08.12 1차 2차 일...

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