Daewoo KOR-631G0A Service Manual
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Daewoo KOR-631G0A Service Manual

Daewoo KOR-631G0A Service Manual

Daewoo electronics service manual microwave oven kor-631g0a, kor-631h0a, kor-631g9a, kor-631h9a, kor-861g0a, kor-861h0a
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S/M No. : R631G0A003
Service Manual

Microwave Oven

Model: KOR-631G0A
KOR-631H0A
KOR-631G9A
KOR-631H9A
KOR-861G0A
KOR-861H0A
• 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. 2003

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Summary of Contents for Daewoo KOR-631G0A

  • Page 1: Microwave Oven

    S/M No. : R631G0A003 Service Manual Microwave Oven Model: KOR-631G0A KOR-631H0A KOR-631G9A KOR-631H9A KOR-861G0A KOR-861H0A • 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

    (arcing, wear, and other damage), (4) Damage to or loosening of hinges and latches, (5) Evidence of dropping or abuse. (c) Before turning on power to the microwave oven for any service test or inspection within the microwave gen- erating compartments, check the magnetron, wave guide or transmission line, and cavity for proper align- ment, integrity, and connections.

  • Page 3: Safety And Precautions

    No grease, soil or spatter should be allowed to build up on these surfaces or inside the oven. DO NOT ATTEMPT TO OPERATE THIS APPLIANCE WITH THE DOOR OPEN. The microwave oven has concealed switches to make sure the power is turned off when the door is opened. Do not attempt to defeat them.

  • Page 4: Specifications

    SPECIFICATIONS MODEL POWER SUPPLY MICROWAVE POWER GRILL CONSUMPTION COMBINATION MICROWAVE ENERGY OUTPUT MICROWAVE FREQUENCY OUTSIDE DIMENSIONS (W X H X D) CAVITY DIMENSIONS (W X H X D) NET WEIGHT TIMER FUNCTION SELECTIONS POWER SELECTIONS CAVITY VOLUME * SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. KOR-631G/H KOR-631G/H9A 120V~60Hz, SINGLE PHASE WITH GROUNDING...

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION(KOR-631G/H, 631G/H9/KOR-861G/H) 465/495 360/ 388...

  • Page 6: Feature Diagram

    2. FEATURE DIAGRAM 1. DOOR SEAL Door seal maintains the microwave within the oven cavity and prevents microwave leakage. 2. DOOR HOOK When the door is closed, it will automatically lock shut. If door is opened while oven is operating, magnetron tube will immediately stop operating.

  • Page 7: Control Panel

    3. CONTROL PANEL 2) KOR-861G0A 1) KOR-631G0A/631G9A 1. Time set pad – Used to set the cooking time and the present time. 2. Display – Cooking time, power level, indicators and present time are displayed. 3. One touch – Used to cook or reheat specific quantities of food.
  • Page 8 3. CONTROL PANEL 1) KOR-631H0A/631H9A/861H0A 1. Time set pad – Used to set the cooking time and the present time. 2. Display – Cooking time, power level, indicators and present time are displayed. 3. One touch – Used to cook or reheat specific quantities of food. 4.

  • Page 9: Installation

    5. Power supply • Check your local power source. This microwave oven requires a current of approximately 12/10(KOR-630A9A) amperes, 120Volts, 60Hz grounded outlet. • Power supply cord is about 0.8 meters long. 1. A short power-supply cord is provided to reduce the risks resulting from becoming entangled in or tripping over a longer cord.

  • Page 10: Operations And Functions

    OPERATIONS AND FUNCTIONS 1. Connect the main lead to an electrical outlet. 2. 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. 3.

  • Page 11: 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.

  • Page 12: To Remove Cabinet

    1. To remove cabinet 1) Remove three screws on cabinet back. 2) Push 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 13 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) 3. To remove door parts. 1) KOR-631G0A/631H0A/631H9A/631G9A REF NO. PART CODE...

  • Page 14: Method To Reduce The Gap Between The Door Seal And The Oven Front Surface

    (1) Remove the gasket door from door weld as. (2) Remove the barrier screen inner from door weld as. (3) Remove the door frame from door weld as. (4) Remove the stopper hinge top from door weld as. (5) Remove the spring and the hook. (6) Remove the supporter barrier screen outer from door frame.
  • Page 15 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) 5. To remove control panel parts. 1) KOR-631G0A/631H0A/631H9A/631G9A REF NO. PART CODE...

  • Page 16: To Remove High Voltage Capacitor

    1) Remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly. 2) Remove the door open lever from the control panel. 3) Remove four screws which secure the PCB assembly to control panel. 4) Disconnect membrane tail from the connector of the PCB assembly.

  • Page 17: To Remove H.v.transformer

    8. To remove wind guide assembly. 1) Remove a screw which secure the wind guide assembly. 2) Draw forward the wind guide assembly. 3) Pull the fan from the motor shaft. 4) Remove two screws which secure the motor shaded pole. 5) Remove the motor shaded pole.

  • Page 18: 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 19: Trouble Shooting Guide

    TROUBLE SHOOTING 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 20 CONDITION CHECK Outlet has Check continuity of magnetron proper volt- age Fuse does not blow. Check continuity of power supply cord Display do not shown countdown NOTE All these switches must be replaced at the same time, please refer to “Interlock Mechanism And Adjustment”. (TROUBLE 2) Display shows all figures selected, but oven does not start cooking, even though desired program and time are set and start button is tapped.
  • Page 21 (TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITION CHECK Check continuity of high microwave voltage capacitor terminals oscillation with wires removed Check continuity of high voltage rectifier in forward and backward direction with DC megger Connect megger leads to mag- netron terminal and magnetron Check resistance of primary and secondary coil of high voltage...
  • Page 22 (TROUBLE 4) The following visual conditions 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) “ :0” does not display when power is on. 2.

  • Page 23: Measurement And Test

    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 24: 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 25: 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 26: Wiring Diagram

    WIRING DIAGRAM...

  • Page 27: 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 NOTE : 1. Refer to Circuit Diagram (point 4). 2.
  • Page 28 Measure Point...
  • Page 29 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. * Cause : RELAY 2 does not operate. - Check method STATE RELAY 2 ON RELAY 2 OFF...

  • Page 30: Pcb Circuit Diagram

    2. PCB CIRCUIT DIAGRAM 1) KOR-631G0A/631H0A/631H9A/631G9A...

  • Page 31: Location No

    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) 3. P.C.B. LOCATION NO. 1) KOR-631G0A/631H0A/631H9A/631G9A NAME BUZZER...
  • Page 32  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) KOR-861G0A/861H0A NAME BUZZER C ARRAY...

  • 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 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) 1) KOR-631G0A/631H0A/631H9A/631G9A PART CODE...
  • Page 35  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) PART CODE 3513811720 3513601500 7121400611...
  • Page 36  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) 1) KOR-861G0A/861H0A PART CODE 3511710700 3516721110...
  • Page 37  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) PART CODE 3513811700 3513601500 7121400611...
  • Page 38 DAEWOO ELECTRONICS CO., LTD. 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” S/M NO. : R631G0A003 PRINTED DATE: Aug. 2001...

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Kor-631h9aKor-631g9aKor-631h0aKor-861g0aKor-861h0a

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