Daewoo KOR-1A1G0A Service Manual
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Daewoo KOR-1A1G0A Service Manual

Daewoo KOR-1A1G0A Service Manual

Microwave oven
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S/M No. : R1A1G0A003
Service Manual

Microwave Oven

Model: KOR-1A1G0A
KOR-1A1H0A
KOR-1A1G1A
KOR-1A1H1A
KOR-1A1G2A
KOR-1A1H2A
KOR-1A1G4A
KOR-1A1H4A
KOR-1A4G0A
KOR-1A4H0A
KOR-1A4H1A
DAEWOO ELECTRONICS CO., LTD.
http : //svc.dwe.co.kr
Jun. 2000

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  • Page 1: Microwave Oven

    S/M No. : R1A1G0A003 Service Manual Microwave Oven Model: KOR-1A1G0A KOR-1A1H0A KOR-1A1G1A KOR-1A1H1A KOR-1A1G2A KOR-1A1H2A KOR-1A1G4A KOR-1A1H4A KOR-1A4G0A KOR-1A4H0A KOR-1A4H1A DAEWOO ELECTRONICS CO., LTD. http : //svc.dwe.co.kr Jun. 2000...

  • 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 microwave 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 Personner. 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 1) KOR-1A1G/H MODEL KOR-1A1G(H)0A/1A KOR-1A1G(H)2A/4A POWER SUPPLY 120V~60Hz, SINGLE PHASE WITH GROUNDING POWER MICROWAVE 1400W 1500W CONSUMPTION GRILL COMBINATION MICROWAVE ENERGY OUTPUT 1000W 1100W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 539 x 300 x 406 mm (21.2 x 11.8 x 16.0 in.) CAVITY DIMENSIONS (W X H X D) 354 x 228 x 373 mm (13.9 x 9.0 x 14.7 in.) NET WEIGHT...

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION 1) KOR-1A1G(H) 2) KOR-1A4G(H)

  • Page 6: Feature Diagram

    EXTERNAL VIEW 2. FEATURE DIAGRAM 1) KOR-1A1G/H 1. DOOR SEAL Door seal surfaces prevent microwave escaping from the oven cavity. 2. DOOR HOOK When the door is closed, it will automatically lock shut. If the door is opened while oven operating, the magnetron tube will immediately stop operating.
  • Page 7 EXTERNAL VIEW 2) KOR-1A4G/H 1. DOOR SEAL Door seal maintains the microwave within the oven cavity and prevents microwave leakae. 2. DOOR HOOK When the door is closed, it will automatically lock shut. If the door is opened while oven operating, magnetron tube will immediately stop operating.

  • Page 8: Control Panel

    EXTERNAL VIEW 3. Control panel 1) KOR-1A1G/KOR-1A4G 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 EXTERNAL VIEW 2) KOR-1A1H/KOR-1A4H 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 10: 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 overheat and, eventually, cause oven failure.

  • Page 11: 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.

  • Page 12: 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 safety during normal operation. However, carelessness in servicing the oven can result in an electric shock or possible danger from a short circuit.
  • Page 13 DISASSEMBLY AND ASSEMBLY 1. To remove cabinet 1) Remove three screws on cabinet back. 2) Push the cabinet backward. 2. To remove door assembly 1) Remove screws which secure the stopper hinge top. 2) Remove the door assembly from top plate of cavity. 3) Reverse the above for reassembly.
  • Page 14 DISASSEMBLY AND ASSEMBLY 3. To remove door parts. 1) KOR-1A1G/H REF NO. PART CODE PART NAME DESCRIPTION Q’ TY REMARK 3517005900 BARRIER - SCREEN * O PET TO 0.25 3512204300 FRAME DOOR ABS XR - 401, H - 2938 3515202900 STOPPER HINGE * T AS KOR - 121M0A 3511711300...
  • Page 15 DISASSEMBLY AND ASSEMBLY 2) KOR-1A4G/H REF NO. PART CODE PART NAME DESCRIPTION Q’ TY REMARK 3511711300 DOOR PAINTING AS KOR-1A1G0A 3513100730 HOOK POM BLACK 3515101300 SPRING HOOK 3517005910 BARRIER-SCREEN * O GLASS T3.2 3512204320 FRAME DOOR ABS XR-401 SB-175 3511604700 DECORATOR DOOR * T STS304 T0.6...
  • Page 16 DISASSEMBLY AND ASSEMBLY 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 stopper hinge top, and then push the door to contact the door seal to oven front surface. Tighten two screws.
  • Page 17 DISASSEMBLY AND ASSEMBLY 5. To remove control panel parts. 1) KOR-1A1G/H REF NO. PART CODE PART NAME DESCRIPTION Q'TY REMARK 3518522100 SWITCH MEMBRANE KOR-1A1G0A 3518522110 SWITCH MEMBRANE KOR-1A1H0A 3516722300 CONTROL-PANEL ABS AF-345, HFA-700HT 3514321910 PCB AS KOR-161H0A 1A1G(H)0A/-1A PKMPM SXV00 PCB AS...
  • Page 18 3516722320 CONTROL-PANEL ABS AF-315/345 HFA-700HT 3514321910 PCB AS KOR-1A1G0A 7122401211 SCREW TAPPING T2S TRS 4* 12 MFZN 1) Remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly. 2) Remove four screws which secure the PCB assembly to control panel.
  • Page 19 DISASSEMBLY AND ASSEMBLY 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 20 DISASSEMBLY AND ASSEMBLY 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 21: 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) KOR-1A1G/H 2) KOR-1A4G/H (1) Primary interlock switch...

  • Page 22: 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 23 TROUBLE SHOOTING GUIDE CONDITION REMEDY CHECK RESULT CAUSE Replace Check continuity of Defective Outlet has magnetron Continuity magnetron proper voltage Fuse does not blow. Open power Replace Check continuity of power supply cord Continuity supply cord Normal Replace Defective touch control circuit Replace Display do not...
  • Page 24 TROUBLE SHOOTING GUIDE (TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITIO N REMED Y CHECK RESULT CAUSE Continuit y Replace Defective No microwave Check continuity of high high voltag oscillation voltage capacitor transformer terminals with wire s removed Replace Continuity in...
  • Page 25 TROUBLE SHOOTING GUIDE (TROUBLE 4) The following visual conditions indicate a profective 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 26: 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 100 5cc of potable water.

  • Page 27: Microwave Radiation Test

    MEASUREMENT AND TEST 2. MICROWAVE RADIATION TEST WARNING 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 28: Component Test Procedure

    MEASUREMENT AND TEST 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. 1.

  • Page 29: Wiring Diagram

    WIRING DIAGRAM 1) KOR-1A1G(H)0A/KOR-1A4G(H)0A...
  • Page 30 WIRING DIAGRAM 2)KOR-1A1G(H)1A / KOR-1A4H1A...
  • Page 31 WIRING DIAGRAM 3)KOR-1A1G(H)2A...
  • Page 32 WIRING DIAGRAM 4)KOR-1A1G(H)4A...

  • Page 33: 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 4 - 7 AC 12.6 AC 14.7V NOTE...
  • Page 34 PRINTED CIRCUIT BOARD Measure Point...
  • Page 35 PRINTED CIRCUIT BOARD 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...

  • Page 36: Circuit Diagram

    PRINTED CIRCUIT BOARD 2. P.C.B. CIRCUIT DIAGRAM...

  • Page 37: Location No

    PRINTED CIRCUIT BOARD 3. P.C.B. LOCATION NO NAME SYMBOL SPECIFICATION PART CODE Q’ TY BUZZER BM-20K 3515600100 C ARRAY 7P(6) 102M 50V CN4XB-102M CAPACITOR ELEC 16V RSS 100uF CEXF1C101V CAPACITOR ELEC 25V RSS 1000uF CEXF1E102V CONNECTOR WAFER YW396-02AV 3519150520 CONNECTOR WAFER YW396-05AV 3519150510 CONNECTOR WAFER...

  • Page 38: 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 1) KOR - 1A1G/H...
  • Page 39 EXPLODED VIEW AND PARTS LIST (1) KOR-1A1G/H REF.NO. PART CODE PART NAME DESCRIPTION Q’ TY REMARK 3511711200 DOOR AS KOR-1A1G0A PKCPSWXN00 CONTROL-PANEL AS KOR-1A1G0A 1A1G0A / -1A PKCPSWXP00 CONTROL-PANEL AS KOR-1A1H0A 1A1H0A / -1A PKCPSWXY00 CONTROL-PANEL AS KOR-1A1G2A 1A1G2A / -4A...
  • Page 40 EXPLODED VIEW AND PARTS LIST REF.NO. PART CODE PART NAME DESCRIPTION Q’ TY REMARK 3512716800 HARNESS MAIN KOR-1A1G0A 1A1G(H)0A 3512716810 HARNESS MAIN KOR-1A1G1A 1A1G(H)1A 3512718000 HARNESS MAIN KOR-1A1G2A 1A1G(H)2A 3512718010 HARNESS MAIN KOR-1A1G4A 1A1G(H)4A 4415A17352 SW MICRO VP-533A-OF SPNO #187 200G...
  • Page 41 EXPLODED VIEW AND PARTS LIST (2) KOR-1A4G/H...
  • Page 42 KOR-1A4H0A 1A4H0A/1A 3510802500 CABINET PCM T0.6 3516004100 SPECIAL SCREW T1 TRS LR4 POLE 4*10 SE MFZN 3516110400 CAVITY AS KOR-1A1G0A 3516110000 CAVITY JOINT AS KOR-1A1G0A 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN 7112401011...
  • Page 43 EXPLODED VIEW AND PARTS LIST REF.NO PART CODE PART NAME DESCRIPTION Q'TY REMARK 3513811710 LOCK POM BLACK 3513601500 LAMP BL 125V 25W T25 C5A H187 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 3966820200 MOTOR SYNCRO 120V 2W GM-16-12G17 3518905400 THERMOSTAT OFF:90 ON:60 H#187 NB 1A4G(H)0A 3518905600...
  • Page 44 DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : “ DAEWOOELEC” FAX : 02)360-7877 TEL : 02)360-7804 E-mail : G7F00E@web.dwe.co.kr PRINTED DATE : APRIL. 2000...

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