Daewoo KOC-910K0P(AL) Service Manual
  1. Manuals
  2. Brands
  3. Daewoo Manuals
  4. Microwave Oven
  5. KOC-910K0P(AL)
  6. Service manual
Daewoo KOC-910K0P(AL) Service Manual

Daewoo KOC-910K0P(AL) Service Manual

Hide thumbs Also See for KOC-910K0P(AL):
Table of Contents

Advertisement

Quick Links

Download this manual
S/M No. : C910K0PAL1
Service Manual

Microwave Oven

Model: KOC-910K0P(AL)
DAEWOO ELECTRONICS CO., LTD.
http : //svc.dwe.co.kr
Mar. 2002

Advertisement

Table of Contents
loading

Related Manuals for Daewoo KOC-910K0P(AL)

Summary of Contents for Daewoo KOC-910K0P(AL)

  • Page 1: Microwave Oven

    S/M No. : C910K0PAL1 Service Manual Microwave Oven Model: KOC-910K0P(AL) DAEWOO ELECTRONICS CO., LTD. http : //svc.dwe.co.kr Mar. 2002...

  • Page 2: Table Of Contents

    PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY Do not operate or allow the oven to be operated with the door open. Make the following safety checks on all ovens to be serviced before activating the magentron or other microwave source, and make repairs if 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

    1. 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 4: Specifications

    2. SPECIFICATIONS MODEL KOC-910K0P POWER SUPPLY 220V~60Hz SINGLE PHASE WITH EARTHING MICROWAVE 1550W POWER GRILL 1600W CONSUMPTION CONVECTION 2300W COMBINATION 3000W MICROWAVE ENERGY OUTPUT 1000W(IEC705) MICROWAVE FREQUENCY 2450MHz × × × × × × OUTSIDE DIMENSIONS (W 515mm (21.3 13.0 20.3in.) ×...

  • Page 5: Feature Diagram

    2. FEATURE DIAGRAM 1. DOOR HOOK When the door is closed, it will automatically lock shut. If door is opened while oven is operating, the magnetron will immediately stop operating. 2. DOOR VIEWING SCREEN Allows viewing of food. The screen is designed so that light can pass through, but not the microwave. 3.

  • Page 6: Installation

    4. INSTALLATION 4. INSTALLATION 4. INSTALLATION 4. 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 All air vents should be kept a clearance. If all vents are covered during operation, the oven may overheat and, eventually, cause failure.

  • Page 7: Control Panel

    5. CONTROL PANEL 5. CONTROL PANEL 5. CONTROL PANEL - KOC-910K More More Less Less Clock Clock Language Language Auto Cook Auto Cook Memory Cake Memory Cake Crusty Crusty Auto Auto Defrost Defrost Start/ Start/ Stop/ Stop/ Speedy Cook Speedy Cook Clear Clear DISPLAY WINDOW...

  • Page 8: Disassembly And Assembly

    6. 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 9 1. To remove cabinet 1) Remove four screws on cabinet back. 2) Push the cabinet backward. 2. To remove guide wind 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 assembly.
  • Page 10 (1) Remove the gasket door from door plate. (2) Remove screws from door plate. (3) Remove the door frame from door plate. (4) Remove the stopper hinge top from door plate. (5) Remove the spring and the hook. (6) Remove the handle door and barrier screen outer from door frame. (7) Reverse the above steps for reassembly.
  • Page 11 5. To remove control panel parts. KOC-910K REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 3515501800 WINDOW DISPLAY PMMA 3516725200 CONTROL PANEL 3516909000 BUTTON FUNCTION-A ABS SG-175, AF-0760D 3516909200 BUTTON FUNCTION-C ABS SG-175, SG-0760D 3516909100 BUTTON FUNCTION-B ABS SG-175, SG-0760D ×...
  • Page 12 6. To remove high voltage capacitor. 1) Remove a screw which secure the grounding ring terminal of the H.V. 1) Remove a screw which secure the grounding ring terminal of the H.V. diode and the capacitor holder. diode and the capacitor holder. 2) Remove the H.V.
  • Page 13 8. To remove wind guide assembly. 1) Remove a screw for earthing. 2) Remove a 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 14 10. To remove Lamp assembly parts. REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 7112401011 SCREW TAPPING T1 TRS 4×10 MFZN 3512520500 GUIDE AIR OUTLET SA1D T0.5 3513303000 INSULATOR HEATER T SECC T0.5 7112401011 SCREW TAPPING T1 TRS 4×10 MFZN 3511407800 COVER LAMP STS430 T0.5...
  • Page 15 11. To remove Top heater assembly parts. REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 7112401011 SCREW TAPPING T1 TRS 4×10 MFZN 3512520500 GUIDE AIR OUTLET SA1D T0.5 3513303000 INSULATOR HEATER T SECC T0.5 7112401011 SCREW TAPPING T1 TRS 4×10 MFZN 3512767000 HARNESS HEATER KOC-1B0K0S...
  • Page 16 12. To remove Rear heater assembly parts. REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 7112401011 SCREW TAPPING T1 TRS 4×10 MFZN 3511407300 COVER MOTOR B SA1D-80 T0.5 7112401011 SCREW TAPPING T1 TRS 4×10 MFZN 3511407900 COVER B SA1D-80 T0.5 3512766900 HARNESS CONVECTION-B KOC-1B0K0S...
  • Page 17 13. To remove Motor synchro. And Under heater assembly parts. CUTTING (6EA) REF NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK 7112401011 SCREW TAPPING T1 TRS 4×10 MFZN 3511407500 COVER HEATER U STS430 T0.5 3515304000 SUPPORTER HEATER U STS430 T0.5 3512802000 HEATER U 230V 400W R18374001...

  • Page 18: Interlock Mechanism And Adjustment

    7. 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. SWITCH MOUNTING SWITCH MOUNTING BRACKET...

  • Page 19: Trouble Shooting Guide

    8. 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 load wire from these parts and check continuity with the AC plug removed.
  • Page 20 CONDITION CHECK RESULT CAUSE REMEDY Check continuity of Defective Outlet has Replace magnetron continuity magnetron. proper voltage fuse does not blow? Check continuity of Open power Replace power supply cord continuity supply cord Defective touch Replace continuity control circuit NOTE : All these switches must be replaced at the same time, please refer to (7.Interlock mechanism and adjust) for adjustment instructions (TROUBLE 2)
  • Page 21 (TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITION CHECK RESULT CAUSE REMEDY microwave Check continuity of Continuity Replace Defective oscillation high voltage capacitor terminals high voltage with wires removed transformer Check continuity of Replace Continuity Defective high high voltage rectifier in forward in backward voltage rectifier...
  • Page 22 (TROUBLE 4) Grill heater(upper heater) is not heated ; food will not become hot. CONDITION CHECK RESULT CAUSE REMEDY Check continuity of Adjust or Malfunction of Grill heater is primary interlock switch replace primary interlock continuity not heated. switch Check continuity of Adjust or Malfunction of secondary interlock switch...
  • Page 23 (TROUBLE 6) Lower heater is not heated ; food will not become hot. CONDITION CHECK RESULT CAUSE REMEDY Check continuity of Adjust or Malfunction of Lower heater primary interlock switch replace primary interlock continuity is not heated switch Check continuity of Adjust or Malfunction of secondary interlock switch...
  • Page 24 (TROUBLE 8) When “ERROR 2 ERROR 3” come on display. CONDITION CHECK RESULT CAUSE REMEDY Check continuity of thermistor Replace Replace “ERROR 2 & Ω or infinite (resistance of thermistor) ERROR 3” come on Approx. display Ω 200k~300k (room temperature) Check continuity of heater Defective Replace...

  • Page 25: Measurement And Test

    9. MEASUREMENT AND TEST 9. 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.

  • Page 26: Microwave Radiation Test

    2. MICROWAVE RADIATION TEST WARNING 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 27: 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. 1.

  • Page 28: Component Action

    4. COMPONENT ACTION MAGNE- UPPER LOWER REAR CONVEC- COOKING MODE TRON ELEMENT ELEMENT ELEMENT TION FAN GRILL-1 GRILL-2 GRILL-3 COMBI-1 COMBI-2 MANUAL MODE COMBI-3 COMBI-4 COMBI-5 CONVECTION 100~130 CONVECTION 140~150 CONVECTION 160~250 CAKE/BREAD TOUCH CRUSTY ROAST BEEF ROAST CHICKEN ROAST PORK BAKED FISH BAKED POTATO AUTO...

  • Page 29: Wiring Diagram

    10. WIRING DIAGRAM 10. WIRING DIAGRAM 10. WIRING DIAGRAM 10. WIRING DIAGRAM...

  • Page 30: Exploded View And Parts List

    11. EXPLODED VIEW AND PARTS LIST 1. DOOR ASSEMBLY Refer to 6. Disassembly and assembly. 2. CONTROL PANEL ASSEMBLY Refer to 6. Disassembly and assembly. 3. TOTAL ASSEMBLY KOC-910K...
  • Page 31 PART CODE PART NAME DESCRIPTION Q’TY 3511714500 DOOR AS KOC-910K0S PKCPWYM00 CONTROL PANEL AS KOC-910K0S 3515202800 STOPPER HINGE *U AS KOR-121M0A 7172400811 SCREW TAPTITE TT3 TRS 4 x 8 MFZN 3510313600 BASE SBHG T0.8 7112401011 SCREW TAPPING T1 TRS 4 x 10 3512101400 FOOT MFZN DASF-310...
  • Page 32 PART CODE PART NAME DESCRIPTION Q’TY 3512766800 HARNESS CONVECTION-A KOC-1B0K0S 3511407700 COVER HEATER*B SA1D T0.5 3513302900 INSULATOR HEATER*B SA1D T0.5 7113400814 SCREW TAPPING T1 BIN 4×8 MFNI 3963514300 MOTOR SHADED POLE 220V 60Hz MW10GA-T01 3511800800 PP GF20 7601400811 SCREW MACHINE PAN 4×8 PW MFZN 7112401011 SCREW TAPPING...
  • Page 33 PART CODE PART NAME DESCRIPTION Q’TY 3517202611 TRAY RACK AS KOC-961C0S 117MM 3517202601 TRAY RACK AS KOC-961C0S 27MM 3517205200 TRAY METAL SPP T0.6 3512521000 GUIDE ROLLER AS KOC-1B0K0S 3516003700 SPECIAL SCREW TT3 HEX 4 x 8 FLG MFZN 3514801400 SENSOR TEMPERATURE PTM-K312-D7 7112401011 SCREW TAPPING...

  • Page 34: Printed Circuit Board

    12. PRINTED CIRCUIT BOARD CIRCUIT CHECK PROCEDURE 1. Low voltage transformer check The low voltage transformer is located on the P.C.B. Measuring condition: Input voltage: 220V / Frequency: 60Hz Terminal Voltage(load) Voltage(no load) AC 17.0 V AC 19.9 V AC 1.3 V AC 1.6 V 9-10 AC 1.3 V...
  • Page 35 3. Case of no microwave oscillation 1) When touching M/W button, oven lamp turns on and Fan motor and turntable rotate, and cook indicator in display comes on. *Cause: RELAY 1 does not operate. 1N4148 G5G-1A-DT 24V C106M STATE POINT A POINT B RELAY 1 ON +5V DC...
  • Page 36 4. Case of no heating of upper grill When touching GRILL 1 & COMBI button, oven lamp turns on and Fan motor and turntable rotate, and cook indicator in display comes on. *Cause: RELAY 2 does not operate. UPPER 1N4148 GRILL G5G-1A-DT 24V C106M...
  • Page 37 7. Case of no stopping of the count down timer When the door is opened during operation, the count down timer does not stop. 35313-0210 1N4148 104Z D.O.M SW POINT POINT A POINT B STATE DOOR OPEN OPEN +5V DC DOOR CLOSED CLOSE CHECK NO...

  • Page 38: Circuit Diagram

    13. P.C.B. CIRCUIT DIAGRAM...
  • Page 39 PCB ASS’Y PART LIST NAME SYMBOL SPECIFCATION PART CODE Q’TY BUZZER BM-20K 3515600100 CAPACITOR CERAMIC C2, C8~C15 104 50V Z AXIAL CCZF1H104Z CAPACITOR CERAMIC 102 50V Z AXIAL CCZB1H102K CAPACITOR ARRAY 6P(5) 1000pF 50V CN5XB-102M CAPACITOR ELECTRO 50V RS 10 uF CEXE1H100A CAPACITOR ELECTRO EC2,EC3...
  • Page 40 DAEWOO ELECTRONICS CO., LTD. 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA S/M NO.: C910K0PAL1 TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” PRINTED DATE: Mar, 2002...

Table of Contents