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Daewoo KOM-9P2CBS Service Manual

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S/M No. : OM9P2CBS001
Service Manual

Microwave Oven

Model: KOM-9P2CBS
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 (http://svc.dwe.co.kr).
May. 2012

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Summary of Contents for Daewoo KOM-9P2CBS

  • Page 1: Microwave Oven

    S/M No. : OM9P2CBS001 Service Manual Microwave Oven Model: KOM-9P2CBS 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 (http://svc.dwe.co.kr).

  • 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: Exposure To Excessive Microwave Energy

    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 POWER SUPPLY 240V AC, 50Hz SINGLE PHASE WITH GROUNDING INPUT POWER 1600 W MICROWAVE ENERGY OUTPUT 1100 W FREQUENCY 2,450MHz OUTSIDE DIMENSIONS (W 542 x 329 x 461 mm CAVITY DIMENSIONS (W 350 x 230 x 357 mm CAVITY VOLUME 29 L NET WEIGHT APPROX.

  • Page 5: External View

    EXTERNAL VIEW 1. OUTER DIMENSION...

  • Page 6: Features Diagram

    2. FEATURES DIAGRAM 1 Safety Interlock System. 5 Door Seal - Door seal maintains the microwave energy within the oven cavity and 2 Door Viewing Screen - Allows viewing of food. prevents microwave leakage. The screen is designed so that light can pass 6 Plate Tray - Made of special heat resistant through, but not the microwave.

  • Page 7: Control Panel

    3. CONTROL PANEL 1 MICROWAVE indicator, showing microwaving 7 TIME SET PAD - Used to set the cooking time. in progress. 8 CHECK - Used to check cooking data. 2 DEFROST indicator, showing defrosting in 9 DOUBLE QUANTITY - Used to extend pro- progress.

  • Page 8: Installation

    • This appliance is supplied with cable of special type, which, if damaged, must be repaired with cable of same type. Such a cable can be purchased from DAEWOO and must be installed by a qualified person. 6. Examine the oven after unpacking for any damage such as: A misaligned door, broken door or a dent in cavity.

  • Page 9: Operations And Functions

    OPERATIONS AND FUNCTIONS 11. Connect the mains lead to an electrical outlet. 12. 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. 13.

  • 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 four screws on cabinet back. 2) Pull the cabinet backward. 2. To remove door assembly 1) Remove three 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 A05-2 A05-3 A05-1 DOOR ASSEMBLY : 3511731000 REF No. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3511731000 DOOR AS KOM-9P2CBS 3511714800 DOOR PAINTING AS KOC-910K0S 3511714700 DOOR SEAL AS KOC-910K0S 3513101200 HOOK 3515102300 SPRING HOOK 3511731200 DOOR SUB AS KOM-9P0C9S...
  • 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 two screws on the stopper hinge top, and then push the door to contact the door seal to the oven front sur- face.
  • Page 14 5. To remove control panel parts. C/PANEL ASSEMBLY : PKCPSWZZ12 REF No. PART CODE PART NAME DESCRIPTION Q’TY REMARK PKCPSWZZ12 CONTROL-PANEL AS KOM-9P2CBS 3516741600 CONTROL-PANEL ABS SG-175, SG-0760D 3518574220 SWITCH MEMBRANE KOM-9P2CBS 3511621100 DECORATOR C-PANEL STS430 T0.5 H/L 7122401211 SCREW TAPPING...
  • Page 15 6. To remove guide wind parts. GUIDE WIND ASSEMBLY : 3512524450 REF No. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3512524450 GUIDE WIND AS KOR-1P559S AMANA 3512515300 GUIDE WIND 3963514380 MOTOR SHADED POLE 230V 50Hz OEM-15DWC2-C03 7121403011 SCREW TAPPING T2S PAN 4X30 MFZN 3511800100 P.P GF20 3518605500...
  • Page 16 7. 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 8.
  • Page 17 9. To remove wind guide assembly. 1) Remove the screw for earthing. 2) Remove the noise filter from the wind guide. 3) Remove the screw which secure the wind guide assembly. 4) Draw forward the wind guide assembly. 5) Pull the fan from the motor shaft. 6) Remove two screws which secure 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. RD/BL RD/GY DOM SWITCH...

  • Page 19: 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 20 CONDITION CHECK RESULT CAUSE REMEDY Replace Defective Outlet has Check continuity of magnetron Continuity magnetron proper voltage Fuse does not Replace Check continuity of Open power blow. Continuity supply cord power supply cord Replace Normal Defective touch control circuit Replace Display do not shown Malfunction of secondary...
  • Page 21 (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 22 (TROUBLE 4) The following visual conditions indicate a probable defective touch control circuit 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: 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. A cylindrical container of borosilicate glass is used for the test. It has a maximum thickness of 3mm, an external diameter of approximately 190mm and a height of approximately 90mm.

  • 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: 230V / Frequency: 50Hz Terminal Voltage LOAD NO LOAD 6-7, 7-8 DC 12V AC 26.0V 9-10 AC 3.4V AC 4.0V...
  • Page 28 Measure Point...
  • Page 29 3. When there is no microwave oscillation 3. When there is no microwave oscillation 1) When touching START pad, oven lamp does not turn on. 1) When touching START pad, oven lamp does not turn on. Fan motor do not rotate, but cook indicator in display comes on. Fan motor do not rotate, but cook indicator in display comes on.

  • Page 30: Pcb Circuit Diagram

    2. PCB CIRCUIT DIAGRAM...

  • Page 31: P.c.b. Location No

    3. PCB LOCATION NO. NAME SYMBOL SPECIFICATION PART CODE Q’TY BUZZER BM-20K (BUJEON) 3515600100 C CERA C1~9 HIKF 50V 0.1MF Z AXIAL CCZF1H104Z C ELECTRO 50V RS 0.1MF (5X11) TP CEXE1H108A C ELECTRO 50V RS 10MF (5X11) TP CEXE1H100A C ELECTRO 50V RS 2.2MF (5X11) TP CEXE1H229A C ELECTRO...

  • 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. GUIDE WIND ASSEMBLY Refer to Disassembly and assembly. 4. TOTAL ASSEMBLY F20 F02...
  • Page 33 REF. NO PART CODE PART NAME DESCRIPTION Q'TY 3511731000 DOOR AS KOM-9P2CBS PKCPSWZZ12 CONTROL-PANEL AS KOM-9P2CBS 3516121900 CAVITY AS KOM-9P0C9S 3966031300 MOTOR SYNCRO SM16F -HK36T1FY 7121400611 SCREW TAPPING T2S PAN 4X6 MFZN 3517101600 STIRRER BLADE AL050-H18 T0.7 3517402400 COUPLER STIRRER...
  • Page 34 DAEWOO ELECTRONICS CORP. 1-2, Jeo-dong 1(il)-ga, Jung-gu, Seoul, Korea C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” S/M NO. : OM9P2CBS001 PRINTED DATE: May. 2012...
  • Page 35 ABOUT THIS MANUAL ABOUT THIS MANUAL ! ! " " # # " " $ $ % % & & ' ' ( ( ) ) * * + + " " ! ! ) ) , , & & " " % % ' ' - - ./ 012 345 6 78 9:;<...

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