Daewoo KOR-631G9 Service Manual
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Daewoo KOR-631G9 Service Manual

Daewoo KOR-631G9 Service Manual

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Service Manual
Microwave Oven
Model: KOR-631G
DAEWOO ELECTRONICS CO., LTD.
S/M No. : R631G0A003
KOR-631H
KOR-631G9
KOR-631H9
KOR-861G
KOR-861H

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Summary of Contents for Daewoo KOR-631G9

  • Page 1 S/M No. : R631G0A003 Service Manual Microwave Oven Model: KOR-631G KOR-631H KOR-631G9 KOR-631H9 KOR-861G KOR-861H DAEWOO ELECTRONICS CO., LTD.

  • 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 MODEL KOR-631G/H KOR-631G/H9 KOR-861G/H POWER SUPPLY 120V~60Hz, SINGLE PHASE WITH GROUNDING MICROWAVE 1200W 1000W 1000W POWER GRILL CONSUMPTION COMBINATION MICROWAVE ENERGY OUTPUT 800W 700W 900W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 465x279x360 mm (18.3x11.0x14.2 in) 495x294x388 mm (19.5x11.6x15.3 in) CAVITY DIMENSIONS (W X H X D) 290x211x306 mm (11.4x8.3x12.0 in)

  • 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/631G9 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 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

    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, cause oven failure.

  • 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. You are asked to observe the following precautions carefully.
  • Page 12 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 3. To remove door parts. 1) KOR-631G/631H/631H9/631G9 REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3512203870 FRAME DOOR ABS SG-175, SG-0760B 3517006180 BARRIER-SCREEN*0 SAN T1.5 3515304610 SUPPORTER BARR-S*0 3515204100 STOPPER SINGE *T AS KOR-6315 3511705500 DOOR WELD AS KOR-6115 3517002800 BARRIER-SCREEN *I POLYESTER T0.1...
  • Page 14 (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 5. To remove control panel parts. 1) KOR-631G0A/631H0A/631H9A/631G9A REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3518521000 SWITCH MEMBRANE KOR-631G/9 3518521010 SWITCH MEMBRANE KOR-631H/9 3516719500 CONTROL PANEL ABS AF-345 HFA-700HT 3516719530 CONTROL PANEL VT-0826, AF-348 KOR-631G/H9A 3514320660 PCB AS KOR-631H9 7122401211 SCREW TAPPING...
  • Page 16 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 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 RESULT CAUSE REMEDY Replace Defective mag- Outlet has Check continuity of magnetron Continuity netron proper volt- age Fuse does not Replace blow. Open power sup- Check continuity of Continuity ply cord power supply cord Replace Normal Defective touch control circuit Replace Display do not shown...
  • Page 21 (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 trans- oscillation with wires removed former Continuity in Replace Check continuity of high voltage Defective high backward rectifier in forward and backward...
  • 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

    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. 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 LOAD NO LOAD AC 12.6 V AC 14.7 V NOTE : 1.
  • 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. refer to Circuit Diagram (Point 3) - Check method POINT STATE...

  • Page 30: Pcb Circuit Diagram

    2. PCB CIRCUIT DIAGRAM 1) KOR-631G/631H/631H9/631G9...

  • Page 31: Location No

    3. P.C.B. LOCATION NO. 1) KOR-631G0A/631H0A/631H9A/631G9A NAME SYMBOL SPECIFICATION PART CODE Q'TY BUZZER BM-20K 3515600100 C ARRAY 7P(6) 102 M 50V CN6XB-102M CAPACITOR ELEC 25V RSS 100uF CEXE1C101V CAPACITOR ELEC 25V RSS 1000uF DEZF1E102V CONNECTOR WAFER YW396-02AV 3519150520 CONNECTOR WAFER YW396-05AV 3519150510 CONNECTOR WAFER...
  • Page 32 2) KOR-861G0A/861H0A NAME SYMBOL SPECIFICATION PART CODE Q'TY BUZZER BM-20K 3515600100 C ARRAY 7P(6) 102 M 50V CN6XB-102M CAPACITOR ELEC 16V RSS 100uF CEXF1C101V CAPACITOR ELEC 25V RSS 1000uF CEXF1C102V CONNECTOR WAFER YW396-02V 3519150520 CONNECTOR WAFER YW396-05V 3519150510 CONNECTOR WAFER FCZ254-11 441M367160 DIODE RECTIFY...

  • 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 1) KOR-631G0A/631H0A/631H9A/631G9A PART CODE PART NAME DESCRIPTION Q'TY 3511710300 DOOR AS KOR-6315 3511714400 DOOR AS KOR-631H9 3516721410 CONTROL-PANEL AS KOR-631G 3516721420 CONTROL-PANEL AS KOR-631H 3516721230 CONTROL-PANEL AS KOR-631H9 3510801310 CABINET PCM T0.36 GE 3516004100 SPECIAL SCREW T1 TRS LR4 POLE 4*10 MFZN 3516109000 CAVITY WELD AS CAVITY WELD AS...
  • Page 35 PART CODE PART NAME DESCRIPTION Q'TY1 3513811720 LOCK POM (LG¨ › ˙ — ) 3513601500 LAMP BL 125V 25W T25 C5A H187 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 3966820200 MOTOR SYNCRO 120V 2W GM-16-12F17 3518905300 THERMOSTAT OFF:75 ON:65 H #187 NB 3513003400 HOLDER THERMOSTAT 3516003700...
  • Page 36 1) KOR-861G0A/861H0A PART CODE PART NAME DESCRIPTION Q'TY 3511710700 DOOR AS KOR-8615 3516721110 CONTROL-PANEL AS KOR-861G 3516721120 CONTROL-PANEL AS KOR-861H 3510801400 CABINET PCM T0.6 3516004100 SPECIAL SCREW T1 TRS 4*10 SE MFZN 3516109200 CAVITY WELD AS CAVITY WELD AS 3516109700 CAVITY JOINT AS CAVITY WELD AS 7112401011...
  • Page 37 PART CODE PART NAME DESCRIPTION Q'TY 3513811700 LOCK 3513601500 LAMP BL 125V 25W T25 C5A H187 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 3966820200 MOTOR SYNCRO 120V 2W GM-16-12F17 3518905300 THERMOSTAT OFF:75 ON:65 H#187 NB 3513003400 HOLDER THERMOSTAT 3516003700 SPECIAL SCREW TT3 TRS 4X8 MFZN 3511406200 COVER WAVE GUIDE...
  • 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...

This manual is also suitable for:

Kor-631hKor-631gKor-631h9Kor-861gKor-861h

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