Daewoo KOR-630A0A Service Manual
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Daewoo KOR-630A0A Service Manual

Kor-630a1a/kor-630a0a/kor-630a9a microwave oven service manual
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Service Manual
Microwave Oven
Model: KOR-630A1A KOR-630A0A
KOR-860A1A KOR-860A0A
KOR-630A9A
DAEWOO ELECTRONICS CO., LTD.
S/M No. : R630A0A9A1

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Summary of Contents for Daewoo KOR-630A0A

  • Page 1 S/M No. : R630A0A9A1 Service Manual Microwave Oven Model: KOR-630A1A KOR-630A0A KOR-860A1A KOR-860A0A KOR-630A9A DAEWOO ELECTRONICS CO., LTD.

  • 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

    TIMER FUNCTION SELECTIONS POWER SELECTIONS CAVITY VOLUME * SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. KOR-630A0A, KOR-630A1A 120V~60Hz, SINGLE PHASE WITH GROUNDING 1200W 800W 2450MHz 465 x 279 x 360 mm (18.3 x 11.0 x 14.2 in) 495 x 294 x 388 mm (19.5 x 11.6 x 15.3 in) 290 x 211 x 306 mm (11.4 x 8.3 x 12.0 in) 320 x 228 x 388 mm (12.6 x 9.0 x 13.3 in)

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION 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 BVERAGE 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 8: 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 9: 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 10: 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 11 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 12 GASKET DOOR 3513100700 HOOK 3515101300 SPRING HOOK PART NAME DESCRIPTION ABS XR-401, H-2938 ABS SG-175V, SG-076D ACRYL KOR-63150S KOR-61150S POLYESTER T0.1 LG(N109-LDK) PART NAME DESCRIPTION ABS XR-401, H-2938 ACRYL KOR-63150S KOR-61150S POLYESTER T0.1 Q’TY REMARK KOR-630A0A/1A KOR-630A9A KOR-630A0A/1A KOR-630A9A Q’TY REMARK...
  • Page 13 (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 14 5) Detach membrane from the control panel. 6) Remove door open button and button spring from the control panel. 7) Reverse the above steps for reassembly. PART NAME DESCRIPTION KOR-630A0A ABS AF-345, HFA-700HT ABS AF-348, VT-0826 KOR-631A0A KOR-631H9A T2S TRS 4X12 MFZN ABS XR-401 H-2938 SWP DIA0.7...
  • Page 15 6. To remove high voltage capacitor. 1) Remove a 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 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 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: 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 19 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 20 (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 21 (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 22: 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 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 1) KOR-630A0A/KOR-860A0A/KOR-630A9A...
  • Page 26 2) KOR-630A1A/KOR-860A1A...

  • 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...

  • Page 31: Location No

    3. P.C.B. LOCATION NO. 1) KOR-630A0A/1A NAME BUZZER C ARRAY CAPACITOR ELEC CAPACITOR ELEC CONNECTOR WAFER CONNECTOR FILM CONNECTOR WAFER DIODE RECTIFY DIODE RECTIFY DIODE ZENER DIODE ZENER LED DISPLAY PCB MAIN R ARRAY RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR...
  • Page 32 2) KOR-630A9A NAME BUZZER C ARRAY CAPACITOR ELEC CAPACITOR ELEC CONNECTOR WAFER CONNECTOR FILM CONNECTOR WAFER DIODE RECTIFY DIODE RECTIFY DIODE ZENER DIODE ZENER LED DISPLAY PCB MAIN R ARRAY RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR REGULATOR TRANSISTOR TRANSISTOR TRANS POWER...
  • Page 33 2) KOR-860A0A/1A NAME BUZZER C ARRAY CAPACITOR ELEC CAPACITOR ELEC CONNECTOR WAFER CONNECTOR FILM CONNECTOR WAFER DIODE RECTIFY DIODE RECTIFY DIODE ZENER DIODE ZENER LED DISPLAY PCB MAIN R ARRAY RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR REGULATOR TRANSISTOR TRANSISTOR TRANS POWER...

  • Page 34: 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(KOR-630A0A/860A0A/630A9A)
  • Page 35 1) KOR-630A0A PART CODE 3511710320 DOOR AS PKCPSWZF00 CONTROL-PANEL AS 3510801310 CABINET 3516004100 SPECIAL SCREW 3516109600 CAVITY AS 7112401011 SCREW TAPPING 7122401211 SCREW TAPPING 7122401211 SCREW TAPPING 7112401011 SCREW TAPPING 35113NAN0H CORD POWER AS 4413A90012 CLAMP POWER CORD 7122401211 SCREW TAPPING...
  • Page 36 2) KOR-860A0A PART CODE 3511710320 DOOR AS PKCPSWNF00 CONTROL-PANEL AS 3510801400 CABINET 3516004100 SPECIAL SCREW 3516109700 CAVITY AS 7112401011 SCREW TAPPING 7122401211 SCREW TAPPING 7122401211 SCREW TAPPING 7112401011 SCREW TAPPING 35113TANT5 CORD POWER AS 4413A90012 CLAMP POWER CORD 7122401211 SCREW TAPPING 7121403011 SCREW TAPPING 3963821600...
  • Page 37 1) KOR-630A9A PART CODE 3511714410 DOOR AS PKCPSWZF10 CONTROL-PANEL AS 3510801310 CABINET 3516004100 SPECIAL SCREW 3516109550 CAVITY AS 7112401011 SCREW TAPPING 7122401211 SCREW TAPPING 7122401211 SCREW TAPPING 7112401011 SCREW TAPPING 35113NCN35 CORD POWER AS 4413AS90012 CLAMP POWER CORD 7122401211 SCREW TAPPING 7121403011 SCREW TAPPING 3963821620...
  • Page 38 1. DOOR ASSEMBLY Refer to Disassembly and assembly. 2. CONTROL PANEL ASSEMBLY Refer to Disassembly and assembly. 3. TOTAL ASSEMBLY(KOR-630A1A/860A1A)
  • Page 39 GUIDE ROLLER AS 3514700710 ROLLER 3512517300 GUIDE ROLLER 3517203600 TRAY PART NAME KOR-630A0S KOR-630A0A SECC T1 TRS 4*10 SE MFZN KOR-63150S T1 TRS 4*10 MFZN T2S TRS 4*12 MFZN T2S PAN 3X6 MFZN OFF:90 ON:60 H #187 T1 TRS 4*10 MFZN 3X0.75 40X40 120-RTML...
  • Page 40 GUIDE ROLLER AS 3514700900 ROLLER 3512509200 GUIDE ROLLER 3517203500 TRAY PART NAME KOR-86050S KOR-630A0A SECC T1 TRS 4*10 SE MFZN KOR-86150S T1 TRS 4*10 MFZN T2S TRS 4*12 MFZN T2S PAN 3X6 MFZN OFF:90 ON:60 H #187 T1 TRS 4*10 MFZN 3X0.75 40X40 120-RTML...

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Kor-630a1aKor-630a9aKor-630a

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