Daewoo KOC-1B4K0S Service Manual
  1. Manuals
  2. Brands
  3. Daewoo Manuals
  4. Microwave Oven
  5. KOC-1B4K0S
  6. Service manual
Daewoo KOC-1B4K0S Service Manual

Daewoo KOC-1B4K0S Service Manual

Hide thumbs Also See for KOC-1B4K0S:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Service Manual
Service Manual

Microwave Oven

Model : KOC-1B4K0S
KOC-1B4K5S
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).
DAEWOO ELECTRONICS CO., LTD.
http://svc.dwe.co.kr
S/M No.: C1B4K0S002

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the KOC-1B4K0S and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Daewoo KOC-1B4K0S

Summary of Contents for Daewoo KOC-1B4K0S

  • Page 1: Microwave Oven

    S/M No.: C1B4K0S002 Service Manual Microwave Oven Model : KOC-1B4K0S KOC-1B4K5S 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 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 3. EXTERNAL VIEW...

  • Page 5: Feature Diagram

    2. FEATURE DIAGRAM 11.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. 12.DOOR VIEWING SCREEN Allows viewing of food. The screen is designed so that light can pass through, but not the microwave. 13.METAL RACK 14.TOP HEATER Turns on when convection, grill and combi cooking is selected.

  • Page 6: 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 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 failure.

  • Page 7: Control Panel

    5. CONTROL PANEL DISPLAY WINDOW 1. MICROWAVE - indicator, showing microwaving in progress. 2. DEFROST- indicator, showing defrosting in progress. 3. GRILL(upper grill heater) - indicator, showing griling in progress. 4. GRILL(lower grill heater) - indicator, showing griling in progress. 5.

  • 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.
  • Page 9 REF NO. PART CODE PART NAME DESCRIPTION Q TY REMARK 3512603520 HANDLE DOOR ALUMINUM 3515307400 SUPPORTER HANDLE KOC-1B4K0S 3511605500 DECORATOR DOOR *U STS304 T0.5 3511605400 DECORATOR DOOR *T STS304 T0.5 3511605700 DECORATOR DOOR *L STS304 T0.5 3511605600 DECORATOR DOOR *R STS304 T0.5...
  • Page 10 (1) Remove the gasket door(A14) from door plate. (2) Remove two screws(A08) from door plate. (3) Remove the door handle (A01) and handle supporter (A02) from door plate. (4) Remove the four door decorators (A03~A06) from door frame. (5) Remove the door frame (A07) from door plate. (6) Remove the stopper hinge top(A10) from door plate.
  • Page 11 ABS SG-175 SG-0760D 3514323130 SUB PCB ASS Y KOC-1B4K 7121301011 SCREW TAPPING T2S PAN 3X10 MFZN PKMPMSAD00 KOC-1B4K0S MAIN PCB ASSY PKMPMSAD20 KOC-1B4K5S 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN (1) Remove four screws(B12) which secure the control panel. (2) Pull out the Main PCB assembly(B11).
  • Page 12 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 13 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. 6) Remove two screws which secure the motor shaded pole.
  • Page 14  Caution: In this Service 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) 10. To remove Lamp assembly parts. REF NO.
  • Page 15  Caution: In this Service 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) 11. To remove Top heater assembly parts. REF NO.
  • Page 16  Caution: In this Service 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) 12. To remove Rear heater assembly parts. REF NO.
  • Page 17  Caution: In this Service 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) 13. To remove Motor synchro. And Under heater assembly parts. CUTTING (6EA) REF NO.

  • 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. (1) Primary interlock switch When the door is closed, the hook locks the oven door.

  • 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 tranformer, disconnect one load wire from these parts and check continuity with the AC plug removed.
  • Page 20 CONDITION CHECK RESULT CAUSE REMEDY Defective Outlet has Check continuity of Replace continuity magnetron. proper magnetron voltage 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 21 TROUBLE 3) No microwave oscillation even though fan motor rotates. CONDITION CHECK RESULT CAUSE REMEDY Check continuity of Replace Defective continuity high voltage fuse microwave high voltage oscillation fuse No microwave oscillation Continuity Check continuity of Defective high voltage capacitor terminals high voltage with wires removed transformer...
  • Page 22 (TROUBLE 4) Grill heater (upper heater) is not heated; food will not become hot. CONDITION CHECK RESULT CAUSE REMEDY Malfunction of Adjust or Check continuity of Grill heater is primary Interlock replace continuity primary interlock switch not heated. switch Adjust or Malfunction of Check continuity of replace...
  • Page 23 (TROUBLE 6) Lower heater is not heated; food will not become hot. CONDITION CHECK RESULT CAUSE REMEDY Malfunction of Adjust or Check continuity of Lower heater primary Interlock Replace continuity Is not heated Primary interlock switch switch Adjust or Check continuity of Malfunction of replace secondary interlock...
  • Page 24 (TROUBLE 8) When ERROR 2 ERROR 3 come on display. CAUSE REMEDY CONDITION CHECK RESULT ERROR 2 & or infinite § Replace Check continuity of thermistor Defective ERROR 3 (resistance of thermistor) thermistor come on display Approx 200k~300k § (room temperature) Defective Replace...

  • Page 25: Mesurement 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. 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 –...

  • 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.

  • 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 COMBI-3 MODE COMBI-4 COMBI-5 CONVECTION100~130 CONVECTION140~150 CONVECTION160~250 CAKE/BREAD TOUCH CRUSTY ROAST BEEF ROAST CHICKEN ROAST PORK BAKED FISH AUTO BAKED POTATO MODE...

  • Page 29: Wiring Diagram

    10. WIRING DIAGRAM...

  • Page 30: Exploded View And Parts List

    11. EXPLODED VIEW AND PARTS LIST 1. DOOR ASSEMBLY 2. CONTROL PANEL ASSEMBLY 3. TOTAL ASSEMBLY...
  • Page 31 In this Service 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) PART CODE PART NAME DESCRIPTION Q’TY 3511714040 DOOR AS KOC-1B4K0S PKCPSWAD00 KOC-1B4K0S CONTROL PANEL AS PKCPSWAD20 KOC-1B4K5S 3515202200 STOPPER HINGE *U AS...
  • Page 32  Caution: In this Service 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) PART CODE PART NAME DESCRIPTION Q’TY...
  • Page 33  Caution: In this Service 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) PART CODE PART NAME DESCRIPTION Q’TY...

  • 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: 120V / Frequency: 60Hz Terminal Voltage(olad) 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. STATE POINT A POINT B RELAY 1 ON +5V DC RELAY 1 OFF +24V DC...
  • Page 36 4. Case of no heating of upper grill When touching GRILL1 & 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. STATE POINT A POINT B RELAY 2 ON +5V DC...
  • 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. POINT STATE DOOR OPEN OPEN +5V DC DOOR CLOSED CLOSE CHECK NO METHOD REMEDY Check the stage(ON,OFF) of the door open Replace door open monitor swith.

  • Page 38: Circuit Diagram

    13. P.C.B. CIRCUIT DIAGRAM...
  • Page 39  Caution: In this Service 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) PCB ASS Y PART LIST NAME SYMBOL SPECIFCATION...
  • Page 40 DAEWOO ELECTRONICS CO., LTD. 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” S/M NO. : C1B4K0S002 PRINTED DATE: DEC, 2001...

This manual is also suitable for:

Koc-1b4k5s

Table of Contents