Daewoo KOR-220SDF Service Manual
  1. Manuals
  2. Brands
  3. Daewoo Manuals
  4. Microwave Oven
  5. KOR-220SDF
  6. Service manual
Daewoo KOR-220SDF Service Manual

Daewoo KOR-220SDF Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
S/M No. : R220SDF001
Service Manual

Microwave Oven

Model: KOR-220SDF
DAEWOO ELECTRONICS CORP.
http : //svc.dwe.co.kr
Jan. 2003

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the KOR-220SDF and is the answer not in the manual?

Questions and answers

Related Manuals for Daewoo KOR-220SDF

Summary of Contents for Daewoo KOR-220SDF

  • Page 1: Microwave Oven

    S/M No. : R220SDF001 Service Manual Microwave Oven Model: KOR-220SDF DAEWOO ELECTRONICS CORP. http : //svc.dwe.co.kr Jan. 2003...

  • 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-220SDF POWER SUPPLY 120V~60Hz, SINGLE PHASE WITH GROUNDING MICROWAVE 1650W POWER GRILL CONSUMPTION COMBINATION MICROWAVE ENERGY OUTPUT 1200W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 612x350x493 mm (24.1x13.8x19.4 in) CAVITY DIMENSIONS (W X H X D) 434x292x481 mm (17.1x11.5x18.9 in)

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION NOTE : Thruoughout this manual, features and appearance way vary from your model.

  • 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 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 SENSOR – Used to cook or reheat pecific quantities of food. 4 TIME COOK –...

  • Page 8: 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 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. You are asked to observe the following precautions carefully.
  • Page 11 1. To remove cabinet 1) Remove 4 screws on cabinet back. 2) Push the cabinet backward. 2. To remove door assembly 1) Remove a screw which secure the stopper hinge top. 2) Remove the door assembly from top plate of cavity. 3) Reverse the above for reassembly.
  • Page 12 3512206100 FRAME DOOR ABS SG-175, SG-0760D A030 3515308000 SUPPORTER PARR-S *0 A040 3515202900 STOPPER HINGE *T AS KOR-121M0A A050 3511719000 DOOR PAINTING AS KOR-220SDF A060 3512302600 GASKET DOOR A070 3517007900 BARRIER SCREEN *I PE T0.1 A080 3513101400 HOOK A090 3515101900...
  • Page 13 4. Method to reduce the gap between the door seal and the oven front surface. (1) To reduce gap located on part ‘A’ Loosen a screws on stopper hinge top, and then push the door to contact the door seal to oven front surface. Tighten a screw.
  • Page 14 5. To remove control panel parts. REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3518523800 SWITCH MEMBRANE KOR-220S 3511678400 CONTROL-PANEL ABS AF-348, VT-0826 3514328100 PCB AS KOR-220S 7122401211 SREW TAPPING T2S TRS 4X12 MFZN 3513702900 LEVER DOOR OPEN 441G430171 SPRING BUTTON SWP DIA0.7 3516910500...
  • 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. N 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 RESULT CAUSE REMEDY Replace Defective Outlet has Check continuity of magnetron Continuity magnetron proper volt- age Fuse does not Replace blow. Open power Check continuity of Continuity supply cord power supply cord Replace Normal Defective touch control circuit Replace Display do not shown Malfunction of...
  • Page 20 (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 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

    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 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...

  • Page 26: 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 27 Measure Point...
  • Page 28 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 29: Pcb Circuit Diagram

    2. PCB CIRCUIT DIAGRAM...

  • Page 30: Location No

    3. P.C.B. LOCATION NO. NAME SYMBOL SPECIFICATION PART CODE Q'TY BUZZER BM-20K 3515600100 C CERA C1~4,6~11,13~15 50V HIKF 0.1UF Z CCZF1H104Z C CERA C5,12 50V B 1000PF K CCZB1H102K C ELECTRO 50V RS 10UF (5X11) TP CEXE1H100A C ELECTRO EC2,EC3 35V RSS 220UF (10X12.5) TP CEXF1V221V C ELECTRO...
  • Page 31 NAME SYMBOL SPECIFICATION PART CODE Q'TY R CARBON FILM 1/6 47K OHM 5% RD-AZ473J- R METAL FILM 1/6 604K OHM 1% RN-AZ6043F R METAL FILM 1/6 301K OHM 1% RN-AZ3013F R METAL FILM 1/6 150K OHM 1% RN-AZ1503F R METAL FILM 1/6 75K OHM 1% RN-AZ7502F R METAL FILM...

  • 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 CONTROL PANEL AS KOR-220SDF 3510806900 CABINET SECC T0.6 3516004100 SPECIAL SCREW T1 TRS LR4 POLE 4X10 MFZN 3516115800 CAVITY AS KOR-220SDF GE SVC 3516114800 CAVITY JOINT AS KOR-220SDF 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN 7122401211 SCREW TAPPING T2S TRS 4*12 MFZN...
  • Page 34 DAEWOO ELECTRONICS CORP. 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” PRINTED DATE: Jan. 2003 S/M NO. : R220SDF001...

Table of Contents