Daewoo 181GOA0A Service Manual
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Daewoo 181GOA0A Service Manual

Daewoo 181GOA0A Service Manual

Daewoo microwave oven model number: 181goa0a
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Service Manual

Microwave Oven

Model : KOR-180A0A
KOR-181G0A
DAEWOO ELECTRONICS CO., LTD.
http://svc.dwe.co.kr
S/M No.: R180A0A002

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Summary of Contents for Daewoo 181GOA0A

  • Page 1: Microwave Oven

    S/M No.: R180A0A002 Service Manual Microwave Oven Model : KOR-180A0A KOR-181G0A DAEWOO ELECTRONICS CO., LTD. http://svc.dwe.co.kr...

  • Page 2: Table Of Contents

    Seal and sealing surfaces (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 generating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, 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-180A, KOR-181G 120V~60HZ, SINGLE PHASE WITH EARTHING 1500 W...

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION...

  • Page 6: Feature Diagram

    2. FEATURE DIAGRAM KOR-180A0A 1. DOOR SEAL Door seal maintains the microwave within the oven cavity and prevents microwave leakage. 2. DOOR HOOK When door is closed, it will automatically lock shut. If door is opened while oven is operating, magnetron tube will immediately stop operating.
  • Page 7 3. CONTROL PANEL (1) KOR-180A0A KOR-180A0A 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 12. Stop/Clear - Used to stop the oven operation or to delete the cooking data. 13. Start/Easy cook - Used to start the oven and also used to set a reheat time. M/W DEF TIMER LOCK lb MICROWAVE OVEN KOR-181G POPCORN 1. BREAD MORE 2.

  • Page 9: Installation

    5. Power supply Check your local power source. This microwave oven requires a current of approximately 3 amperes, 120Volts, 60Hz grounded outlet. 1. A short power-supply cord is provided to reduce the risks resulting from becoming entangled in or trippping 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

    - 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 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. REF NO. PART CODE PART NAME DESCRIPTION Q TY REMARK...
  • Page 14 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 15 5. To remove control panel parts. REF NO. PART CODE 3518522800 SWITCH MEMBRANE 3518522810 3516726000 CONTROL PANEL 3516719100 PKMPMSXL00 PCB AS 7122401211 SCREW TAPPING 3513702800 LEVER DOOR OPEN 441G430171 BUTTON SPRING 3516909600 BUTTON DOOR OPEN (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.
  • Page 16 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 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 tranformer, disconnect one load wire from these parts and check continuity with the AC plug removed.
  • Page 20 CONDITION CHECK Outlet has Check continuity of magnetron proper voltage Fuse does not blow. Check continuity of power supply cord Display do not shown countdown NOTE1 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 pad 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 magnetron terminal and magnetron body Check resistance of primary and...
  • Page 22 (TROUBLE 4) The following visual conditions inditions 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: Mesurement And Test

    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 2. The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 190 mm.

  • 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 Ciruit Diagram (point 4). 2. Secondary side voltage of the low voltage transformer changes in proportion to fluctuation of power source voltage.
  • Page 28 Mesure 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. NAME BUZZER C ARRAY CAPACITOR ELEC CPAPCITOR ELEC CONNECTOR WAFER CONNECTOR WAFER CONNECTOR WAFER DIODE RECTIFY DIODE RECTIFY DIODE ZENER DIODE ZENER LED DISPLAY PCB MAIN R ARRAY RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR REGULATOR TRANSISTOR TRANSISTOR...

  • Page 32: 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 33 REF NO PART CODE 3511715500 DOOR AS DOOR AS 3511715510 PKCPSWAC00 CONTROL-PANEL AS PKCPSWAC50 CONTROL-PANEL AS 3510802400 CABINET 3516004100 SPECIAL SCREW 3516113100 CAVITY AS 3516112400 CAVITY JOINT AS 7122401211 SCREW TAPPING 7122401211 SCREW TAPPING 7122401011 SCREW TAPPING 35113TCN35 CORD POWER AS 7122401211 SCREW TAPPING FUSE...
  • Page 34 REF NO PART CODE 3513814300 LOCK 3513601500 LAMP 7121400611 SCREW TAPPING 3966820200 MOTOR SYNCRO 3518905300 THERMOSTAT 3513003400 HOLDER THERMOSTAT 7272400811 SCREW TAPTITE 3511406220 COVER WAVE GUIDE 3517400620 COUPLER 3514700710 ROLLER 3512517200 GUIDE ROLLER 3517207700 TRAY PART NAME POM BLACK BL 125V 25W T25 C5A #187 T2S PAN 4X6 MFZN 120V 2W GM-16-12F17 OFF:75 ON:65 H #187 NB...
  • Page 35 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. : R180A0A002 PRINTED DATE: DEC, 2001...

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