Daewoo KOR-6CDS8A18 Service Manual
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Daewoo KOR-6CDS8A18 Service Manual

Daewoo KOR-6CDS8A18 Service Manual

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S/M No. : R63CS8A181
Service Manual

Microwave Oven

Model: KOR-6CDS8A18
Caution
: In this Manual, some parts can be changed for improving,
their performance without notice in the parts list. So, if you
need the latest parts information, please refer to PPL(Parts
Price List) in Service Information Center.
July. 2006

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Summary of Contents for Daewoo KOR-6CDS8A18

  • Page 1: Microwave Oven

    S/M No. : R63CS8A181 Service Manual Microwave Oven Model: KOR-6CDS8A18 Caution : In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service Information Center.

  • 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 4: Specifications

    SPECIFICATIONS MODEL KOR-6CDS8A18 POWER SUPPLY 120V AC, 60Hz, SINGLE PHASE WITH GROUNDING MICROWAVE 1400W POWER GRILL CONSUMPTION COMBINATION CONVECTION MICROWAVE ENERGY OUTPUT 950W MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 20.4 x12.6 x 15.7 in CAVITY DIMENSIONS (W X H X D) 11.4 x 8.7 x 12.0 in...

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION...

  • Page 6: Feature Diagram

    2. FEATURE DIAGRAM 1 Door seal Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage. 2 Oven cavity 3 Safety interlock system 4 Control panel 5 Door release button By pushing this button the latch system cut off all circuits and stops the oven before the door is opened. 6 Coupler This fits over the shaft in the centre of the ovens cavity floor.

  • 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 Sensor cook - Used to automatically compute the microwave power and cooking time for foods. 4 Help - Used to help you to operate the oven easily.

  • 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. Plug power supply cord into a standard 3-pronged 12 Amp, 120V AC 60Hz power outlet. 2. After placing the food in a suitable container, open the oven door and put it on the glass tray. The glass tray and roller guide must always be in place during cooking. 3.

  • Page 10: Disassembly And Assembly

    DISASSEMBLY AND ASSEMBLY Cautions to be observed when troubleshooting. 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 three screws on cabinet back. 2) Pull 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 12 3. To remove door parts. DOOR ASSEMBLY : 3511723740 REF NO. PART CODE PART NAME DESCRIPTION Q'TY REMARK 3512208540 FRAME DOOR ABS SG-0760D SG-175 3517007300 BARRIER-SCREEN *O PET T0.125 3515204100 STOPPER HINGE *T AS KOR-63150S 3511719500 DOOR PAINTING AS KOR-6C0B5S 3517002800 BARRIER SCREEN *I POLYESTER TO.1...
  • 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 the screw 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. CONTROL PANEL ASSEMBLY : PKCPSWB510 REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3518571810 SWITCH MEMBRANE KOR-6CDS8A18 3516734440 CONTROL PANEL ABS VT-0826, AF-0826 PKMPMSB510 PCB MAIN MANUAL AS KOR-6CDS8A18 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN...
  • Page 15 6. To remove high voltage capacitor. 1) Remove the 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 8. To remove wind guide assembly. 1) Remove the screw for earthing. 2) Remove the screw which secure the wind guide assembly. 3) Draw forward the wind guide assembly. 4) Pull the fan from the motor shaft. 5) Remove two screws which secure the motor shaded pole. 6) 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. CONDITION : DOOR CLOSED CONDITION : DOOR OPEN (1) Primary interlock switch...

  • Page 18: Troubleshooting Guide

    TROUBLESHOOTING 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 Defective Outlet has Check continuity of Replace continuity magnetron. proper volt- magnetron fuse does not blow. Check continuity of noise filter Defective line Replace continuity filter board board Open power Check continuity of Replace continuity supply cord power supply cord Defective touch...
  • 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 oscillation with wires removed transformer 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 27.3 V AC 28.6 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 6. When Er01 & Er03 come on display. Refer to Circuit Diagram (Point 6) - Check method * In AUTO REHEATING just operating, checking point A, B, C & D after 1~2 minutes. CHECK POINT REMARK Tolerance 0.5V VALUE 3.5V 11.3Vdc 4.4Vdc 2.2Vdc...

  • Page 30: Pcb Circuit Diagram

    2. PCB CIRCUIT DIAGRAM...

  • Page 31: Pcb Location No

    3. PCB LOCATION NO. PART NAME SYMBOL SPECIFICATION PART CODE Q’TY BUZZER 3515600100 BM-20K C ARRAY CN7XB-102M 8P(7) 102 M 50V CAPACITOR CERA C1~C4,C6~C13 CCZF1H104Z 104 Z 50V AXIAL CAPACITOR CERA CCZB1H102K 102 K 50V AXIAL CAPACITOR ELEC CEXE1H100A 50V RS 10UF CAPACITOR ELEC CEXF1E471V 25V RSS 470UF...

  • 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 PART NAME DESCRIPTION Q'TY 3511723740 DOOR AS KOG-6CDB3S PKCPSWB510 CONTROL-PANEL AS KOR-6CDS8A18 3510805300 CABINET AS KOR-61150S 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN 3516109500 CAVITY AS KOR-63150S 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 7122401211 SCREW TAPPING...
  • 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” S/M NO. : PRINTED DATE: July. 2006...

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