Daewoo KOR-4115 Service Manual
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Daewoo KOR-4115 Service Manual

Daewoo KOR-4115 Service Manual

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Service Manual
Microwave Oven
Model : KOR-4115
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).
DAEWOO ELECTRONICS CO., LTD.
OVERSEAS SERVICE DEPT.

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Summary of Contents for Daewoo KOR-4115

  • Page 1 Service Manual Microwave Oven Model : KOR-4115 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 opened. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other micro-wave 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, and (5) evidence of dropping or abuse.

  • Page 3: Proper Use And Service Precautions

    PROPER USE AND SERVICE PRECAUTIONS 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 ITEM SPECIFICATION POWER SUPPLY 230V~50HZ, SINGLE PHASE WITH EARTHING POWER CONSUMPTION 920 W MICROWAVE OUTPOWER 600 W (IEC 705) (FULL MICROWAVE POWER) FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 444X235X344mm CAVITY DIMENSIONS (W X H X D) 265X172X270mm NET WEIGHT APPROX.

  • Page 5: Schematic Diagram Of Features

    SCHEMATIC DIAGRAM OF FEATURES ¤ Safety Interlock System ¤Ł Door Viewing Screen - Allows viewing of food, the screen is designed so that light can pass through, but not the microwave. ¤Ø Door Hook - When the door is closed, it will automatically shut. if the door is opened while the oven is operating, the magnetro will immediately stop operating.

  • Page 6: 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 a clearance. If all vents are covered during operation, the oven may be overheated and, eventually, oven failure caused.

  • Page 7: Operation

    OPERATION Connect the main lead to an electrical outlet. 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. CLOSE THE DOOR securely. Choose cooking power level by setting V.P.C.

  • Page 8: Measurement Of The Microwave Output Power

    MEASUREMENT OF THE MICROWAVE OUTPUT POWER 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 1,000 ¡...

  • Page 9: Microwave Radiation Test

    MICROWAVE RADIATION TEST WARNING • Make sure to check the microwave leakage before and after repair or adjustment. • Always, start measuring of an unknown field to assure safety for operating personnel from microwave energy. • Do not place your hands into any suspected microwave radiation field unless the safe density level is known. •...

  • Page 10: Wiring Diagram

    WIRING DIAGRAM...

  • Page 11: Circuit Description

    CIRCUIT DESCRIPTION 1. When the food is placed in the oven cavity and door is closed. • The contact of the interlock monitor switch is opened(NO). • The contacts of the primary interlock switch and secondary interlock switch are closed. Primary Timer Interlock...
  • Page 12 HIGH VOLTAGE TRANSFORMER H.V. CAPACITOR H.V. DIODE Fig. 2 3. When the door is opened during cooking. • Primary interlock switch and secondary interlock switch open to cut off the primary voltage to the high voltage transformer to stop microwave oscillation. •...

  • Page 13: Precations For Disassembly And Repair

    PRECAUTIONS FOR DISASSEMBLY AND REPAIR - Cautions to be observed during troubleshooting. Unlike many other appliances, the microwave oven is a high-current equipment. It is completely safe during normal operation. However, carelessness in servicing the oven can result in an electric shock or possible dnager from a short circuit.

  • Page 14: Disassembly And Assembly

    DISASSEMBLY AND ASSEMBLY 1. To remove cabinet Remove three screws on cabinet back. 2. To remove door assembly. 1) Remove two screws ¤ Which secure the stopper hinge top. 2) Remove the stopper hinge top ¤Ł and door assembly ¤Øfrom top plate of cavity. 3) Remove the stopper hinge top ¤Ł...
  • Page 15 (1) Remove the gasket door ¤ from door plate. (2) Remove the barrier screen inner ¤Łfrom door plate. (3) Remove the door frame ¤Øfrom door plate. (4) Remove the spring ¤ºand the hook ¤Œ . (5) Remove the barrie screen outer ¤ from door frame ¤Ø (6) Reverse the above steps for reassembly.
  • Page 16 5. To remove control panel parts. (1) Remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly. Control Panel (2) Remove two screws ¤ which secure the timer assembly ¤Ł . (3) Remove the timer assembly ¤Ł...
  • Page 17 6. To remove high voltage capacitor (1) Remove a screw ¤ which secure the grounding ring terminal of the H.V. diode ¤Łand the capacitor holder ¤Ø . (2) Remove the H.V. diode ¤Łfrom the capacitor holder ¤Ø . (3) Reverse the above steps for reassembly. High voltage circuit wiring Magnetron H.V.
  • Page 18 CAUTION : Never install the magnetron without the metallic gasket plate which is packed with each magnetron to prevent microwave leakage. Whenever repair work is carried out on magnetron, check the microwave leakage. It shall nor exceed 4mW/cm2 for a fully assembled oven with door normally closed.

  • Page 19: Interlock Mechanism

    INTERLOCK MECHANISM 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 the oven door.
  • Page 20 (2) Secondary interlock switch and interlock monitor switch When the door is closed, the hook presses the button of the monitor interlock switch to bring it under “NO” , condition and presses the button of the secondary interlock switch to bring it INTERLOCK under “NO”...

  • Page 21: Trouble Shooting Guide

    TROUBLE SHOOTING GUIDE Trouble Door shut, timer set but no cooking takes place. Does the fan motor work when you shut the door and turn the timer? Does 12A fuse blow? Replace Check continuity of continuity continuity primary interlock switch. interlock monitor switch secondary interlock switch with door shuted.
  • Page 22 Does the fan motor work when you shut the door and turn the timer? Does the oven lamp light? Oven does not work Does the turntable turn? operate Microwave oscillation Check the relay operate Replace slow acting contact of slow relay ass’y.

  • Page 23: Component Test Procedure

    COMPONENT TEST PROCEDURE 1. High voltagbe is present at the high voltage terminal of the high voltage transformer during any cooking cycle. 2. It is neither necessary nor advisable to attempt measurement of the high voltage. 3. before touching any oven components or wiring, always unplug the oven from its power source and discharge the capacitor (see page 13).

  • Page 24: Safety Interlock Continuity Test

    SAFETY INTERLOCK CONTINUITY TEST • Disconnect the oven from the power supply. • You can test continuity of safety interlocks and monitor switches by using switch tester or ohmmeter. • The switch operation is checked by the lamp on/off of resistance zero/unlimited. •...

  • Page 25: Exploded And Parts List

     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) EXPLODED AND PARTS LIST 1.
  • Page 26  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) 2. Control Panel Assembly PART CODE DESCRIPTION PART NAME...
  • Page 27 3. Main Unit...
  • Page 29  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) ƒNS : Substitutive REF NO PART CODE PART NAME...
  • Page 30  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) ƒNS : Substitutive REF NO PART CODE PART NAME...

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