Daewoo KOG-574R0S Service Manual
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Daewoo KOG-574R0S Service Manual

Daewoo KOG-574R0S Service Manual

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Service Manual

Microwave Oven

KOG-574R0S
MODEL :
KOG-575R0S
DAEWOO ELECTRONICS CO., LTD
SN:G574R0S001 SEP. 2000
http : //svc.dwe.co.kr

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Summary of Contents for Daewoo KOG-574R0S

  • Page 1: Microwave Oven

    Service Manual Microwave Oven KOG-574R0S MODEL : KOG-575R0S DAEWOO ELECTRONICS CO., LTD SN:G574R0S001 SEP. 2000 http : //svc.dwe.co.kr...

  • Page 2: Safety And Precautions

    SAFETY AND PRECAUTIONS 1. FOR SAFE OPERATION Damage that allows the microwave energy (that cooks or heats the food) to escape will result in poor cooking and may cause serious bodily injury to the operator. IF ANY OF THE FOLLOWING CONDITIONS EXIST, OPERATOR MUST NOT USE THE APPLIANCE. (Only a trained service personnel should make repairs.) (1) A broken door hinge.

  • Page 3: Specifications

    SPECIFICATIONS MODEL KOG-574ROS/575R0S/575R0S01/575R0S02/574R0S03 POWER SUPPLY 230V ~ 50Hz, SINGLE PHASE WITH EARTHING POWER MICROWAVE 1,200W CONSUMPTION GRILL 1,050W COMBINATION 2,200W MICROWAVE ENERGY OUTPUT 800W MICROWAVE FREQUENCY 2,450MHz OUTSIDE DIMENSIONS(W X H X D) 465 x 279 x 360 mm (18.3 x 11.0 x 14.2in.) CAVITY DIMENSIONS (W X H X D) 290 x 208 x 306 mm (11.4 x 8.2 x 12.0 in.) NET WEIGHT...

  • Page 4: External View

    EXTERNAL VIEW 1. OUTER DIMENSION 2. FEATURE DIAGRAM 1. Door seal - Door seal maintains the microwave energy 8. Roller guide - This must always be used for cooking within the oven cavity and prevents microwave leakage. together with the glass cooking tray. 2.

  • Page 5: Control Panel

    EXTERNAL VIEW 3. CONTROL PANEL Power/Def Grill/Combi Clock Auto Cook 1. Dinner Plate 2. Soup 3. Beverage 4. Fresh Vegetable Stop/Clear Start/Easy Cook 12. Display - Cooking time, power level, indicators and 16. Start/Easy cook - Used to start the oven operation and present time are displayed.

  • Page 6: Installation

    INSTALLATION 1. Steady, flat location This microwave oven should be set on a steady, flat surface. This microwave oven is designed for counter top use only. 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 7: 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 8: 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. You are asked to observe the following precautions carefully.
  • Page 9 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 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 10 DISASSEMBLY AND ASSEMBLY 3. To remove door parts. DOOR ASSEMBLY KOG-57470S : 3511712140 REF NO. PART CODE PART NAME DESCRIPTION Q’ TY REMARK 3512203850 FRAME DOOR ABS XR-401, H-2938 3517005620 BARRIER-SCREEN*O TEMP GLASS T3.2 MIRROR 3515204100 STOPPER HINGE*T AS KOR-63150S 3511706120 DOOR PAINTING AS KOR-634R0S...
  • Page 11 DISASSEMBLY AND ASSEMBLY A01 A02 DOOR ASSEMBLY KOG-57570S : 3511712150 REF NO. PART CODE PART NAME DESCRIPTION Q'TY REMARK 3512203850 FRAME DOOR ABS SG-175, SG-0760D 3517005620 BARRIER-SCREEN *O TEMP GLASS T3.2 MIRROR 3515204100 STOPPER HINGE *T AS KOR-63150S 3511706120 DOOR PAINTING AS KOR-634R0S 3517002800 BARRIER-SCREEN *I...
  • Page 12 DISASSEMBLY AND ASSEMBLY (1) Remove the gasket door from door weld as. (2) Remove the barrier screen inner from weld as. (3) Remove the door frame from door weld as. (4) Remove the stopper hinge top from weld as. (5) Remove the spring and the hook. (6) Remove the barrier screen outer from door frame.
  • Page 13 DISASSEMBLY AND ASSEMBLY 5. To remove control panel parts. CONTROL-PANEL ASSEMBLY KOG-574R0S : PKCPSWZ100 REF NO. PART CODE PART NAME DESCRIPTION Q'TY REMARK 3513404620 KNOB VOLUME ABS XR-401, H-2938 COATING 3511604510 DECORATOR C-PANEL STS T0.6 3516003910 SPECIAL DOUBLE TAPE SI-161 T0.15...
  • Page 14 DISASSEMBLY AND ASSEMBLY CONTROL-PANEL ASSEMBLY KOG-575R0S : PKCPSWZ200 REF NO. PART CODE PART NAME DESCRIPTION Q'TY REMARK 3513403800 KNOB VOLUME ABS XR-401, H-2938 3511604530 DECORATOR C-PANEL STS T0.6, KOR-635R0S 3516003960 SPECIAL DOUBLE TAPE SI-161 T0.15 3515501530 WINDOW DISPLAY PMMA T0.2 3516723700 CONTROL PANEL ABS XR-401, H-2938...
  • Page 15 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 16 DISASSEMBLY AND ASSEMBLY 8. To remove wind guide assembly. 1) Remove a screw for earthing. 2) Remove the noise filter from the wind guide. 3) Remove a screw which secure the wind guide assembly. 4) Draw forward the wind guide assembly. 5) Pull the fan from the motor shaft.
  • Page 17 DISASSEMBLY AND ASSEMBLY 10. To remove tray motor. (1) Remove the coupler in the cavity. (2) Turn the set upside down. (3) Cut the tray motor cover part from the base plate. (4) Remove the tray motor cover. (5) Remove a screw which secure the tray motor. (6) Remove the tray motor.
  • Page 18 DISASSEMBLY AND ASSEMBLY 12. To remove heater parts. HEATER TOP ASSEMBLY : 3512803600 REF NO. PART CODE PART NAME DESCRIPTION Q'TY REMARK 3512765100 HARNESS HEATER KOC-970T1S TEFLON 7112401011 SCREW TAPPING T1 TRS 4X10 MFZN 3510607800 BRACKET HEATER *T SBHG T0.5 3512803700 HEATER MIRACLON 115V AC 500W...

  • Page 19: 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 20: Troubleshooting 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 21 TROUBLE SHOOTING GUIDE CONDITION CHECK RESULT CAUSE REMEDY Replace Check continuity of Defective Outlet has magnetron Continuity magnetron proper voltage Fuse does not blow. Check continuity of Replace Defective line noise filter board Continuity filter board Open power Replace Check continuity of power supply cord Continuity supply cord...
  • Page 22 TROUBLE SHOOTING GUIDE (TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITION CHECK RESULT CAUSE REMEDY Check continuity Replace Continuity Defective No microwave of high voltage high voltage oscillation capacitor transformer terminals with wires removed Replace Continuity in Defective Check continuity of high backward...
  • Page 23 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 24: 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 25: Microwave Radiation Test

    MEASUREMENT AND 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.

  • Page 26: 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 27: Wiring Diagram

    WIRING DIAGRAM...

  • Page 28: 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 : 230V / Frequency : 50Hz Terminal Voltage LOAD NO LOAD 4 - 7 AC 25.8 V AC 28.4 V NOTE :...
  • Page 29 PRINTED CIRCUIT BOARD Measure Point...
  • Page 30 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 31: Circuit Diagram

    PRINTED CIRCUIT BOARD 2. P.C.B. CIRCUIT DIAGRAM b b f f...
  • Page 32 PRINTED CIRCUIT BOARD 3. P.C.B. LOCATION NO. NAME NAME SYMBOL SPECIFICATION PART CODE Q'TY REMARK PCB MAIN M166 82 X 146.8 3514321140 MAIN PCB BUZZER BM-20K 3515600100 C ARRAY 5P(4) 1000PF M 50V CN4XB-102M CAPACITOR CERA 102 50V Z AXIAL CCZB1H102K CAPACITOR CERA C1~5, C7...

  • 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 F38 F37...
  • Page 34 EXPLODED VIEW AND PARTS LIST REF NO. PART CODE PART NAME DESCRIPTION SUPPLY REMARK DOOR AS Refer to Disassembly and Assembly CONTROL-PANEL AS 3512803600 HEATER *T AS KOG-57350S 3510801310 CABINET 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN 3516111900 CAVITY AS KOG-57350S 7122401211 SCREW TAPPING...
  • Page 35 EXPLODED VIEW AND PARTS LIST 3518905300 THERMOSTAT OFF:75 ON:65 H #187 NB 3513003400 HOLDER THERMOSTAT 7272400811 SCREW TAPTITE TT3 TRS 4X8 MFZN 4078502031 BUTTON LOCKING PP HONAM A353 3511405100 COVER WAVE GUIDE MICA T0.35 3517400620 COUPLER XAREC 3512517500 GUIDE ROLLER AS KOR-63150S 3514700710 ROLLER...
  • Page 36 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 PRINTED DATE : SEP. 2000...

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