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Daewoo KOR-4A0B0W Service Manual - Specifications

Manual is about: Microwave Oven

Summary of KOR-4A0B0W

  • Page 1

    Service manual microwave oven model: kor-4a0b0w s/m no. : or4a0b0w001 jan. 2011 ✔ 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 info...

  • Page 2

    1 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- w...

  • Page 3: Safety and Precautions

    2 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 trai...

  • Page 4: Specifications

    3 specifications power supply 230v ac, 50hz single phase with grounding input power 900 w microwave energy output 500 w frequency 2,450mhz outside dimensions (w h d) 424 x 223 x 317 mm cavity dimensions (w h d) 275 x 178 x 297 mm cavity volume 15 l net weight approx. 9.0 kg timer 59 min. 90 sec. Pow...

  • Page 5: External View

    4 external view 1. Outer dimension 424 223 317.

  • Page 6

    5 1 2 3 w q 4 0 6 7 9 8 5 1 1 door latch - when the door is closed, it will auto- matically shut off. If the door is opened while the oven is operating, the magnetron will automatically shut off. 2 2 door seal - the door seal surfaces prevent microwaves escaping from the oven cavity. 3 3 oven cavity...

  • Page 7

    6 1 2 7 4 5 3 9 6 8 1 1 display - cooking time, power level, indica- tors and the current time are displayed. 2 2 auto cook - used to cook or reheat many of favorite food. 3 3 defrost - used to defrost foods for time and weight. 4 4 power - used to set power level. 5 5 clock - used to set clock. 6 6...

  • Page 8: Installation

    7 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,...

  • Page 9: Operations and Functions

    8 make sure the oven is properly installed and plugged into the electrical. Operations and functions 1 1. Connect the mains lead to an electrical outlet. 1 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 durin...

  • Page 10: Disassembly and Assembly

    9 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 da...

  • Page 11

    10 1. To remove cabinet 1) remove four 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. Note : after replacing the door ...

  • Page 12: Door Assembly : 3511730500

    11 3. To remove door parts. A01 a02 a03 a04 a05 a06 a07 a08 1) remove the gasket door from the door painting as. 2) remove the barrier screen inner from the door painting as. 3) remove the frame door from the door painting as. 4) remove the stopper hinge top as from the door painting as. 5) remove t...

  • Page 13

    12 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. • tighten two screws. (2) to reduce gap located on part ‘b...

  • Page 14: C/panel Assembly :

    13 5. To remove control panel parts. 1) remove the screw which secure the control panel sub as, push up two snap fits and draw forward the control panel assembly. 2) remove three screws which secure the pcb assembly to the control panel sub as. 3) disconnect membrane tail from the connector of the p...

  • Page 15: Guide Wind Assembly :

    14 6. To remove guide wind parts. Guide wind assembly : 3512530430 1) remove two screws for earthing and for fixing to rear-plate. 2) remove the noise filter from the guide wind. 3) pull the fan from the motor shaft. 4) remove two screws which secure the motor shaded pole. 5) remove the motor shaded...

  • Page 16

    15 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. To remove magnetron. 1) rem...

  • Page 17

    16 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 ...

  • Page 18

    17 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. (3) adjustment steps a) ...

  • Page 19: Troubleshooting Guide

    18 (trouble 1) oven does not operate at all ; any inputs can not be accepted. 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. ...

  • Page 20

    19 condition check check continuity of magnetron defective mag- netron result no continuity cause remedy replace outlet has proper volt- age fuse does not blow. Check continuity of noise filter board defective mag- netron no continuity replace check continuity of power supply cord open power sup- pl...

  • Page 21

    20 (trouble 3) no microwave oscillation even though fan motor rotates. Condition check result check continuity of high voltage capacitor terminals with wires removed continuity cause defective high voltage trans- former remedy replace no microwave oscillation check continuity of high voltage fuse re...

  • Page 22

    21 (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. A distinct cha...

  • Page 23: Measurement and Test

    22 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 ...

  • Page 24

    23 2. Microwave radiation test procedures 1. Prepare microwave energy survey meter, 600cc glass beaker, and glass thermometer 100˚c(212˚f). 2. Pour 275cc±15cc of tap water initially at 20±5˚c(68±9˚f) in the 600cc glass beaker with an inside diameter of approx. 95mm(3.5in.). 3. Place it at the center...

  • Page 25

    24 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 ...

  • Page 26: Wiring Diagram

    25 wiring diagram.

  • Page 27: Printed Circuit Board

    26 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 2. Voltage check • key check point • check method no check point remark 1 ic 1 pin 5 5 vdc 2 ic 1 pin 8 3 ic 1 pin 19 o...

  • Page 28

    27 measure point mp1 mp2 gnd.

  • Page 29

    28 3. When there is no microwave oscillation 1) when touching start pad, oven lamp does not turn on. Fan motor does not rotate, but cook indicator in display comes on. 2) when touching start pad, oven lamp turns on. Fan motor and turntable rotate and cook indicator in display comes on. 4. When the d...

  • Page 30

    29 2. Pcb circuit diagram.

  • Page 31

    30 no name symbol specification part code q’ty 1 buzzer bz1 bm-20k 3515600100 1 2 capacitor ceramic c1,2,3,8,9 50v 0.1uf z axial cczf1h104z 5 3 capacitor ceramic c4,5,6,7 50v 1000pf z axial cczb1h102k 4 4 capacitor electro ec1 50v rs 10uf(5x11) cexe1h100a 1 5 capacitor electro ec2 50v rss 220uf(10x1...

  • Page 32: Exploded View and Parts List

    31 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 exploded view and parts list.

  • Page 33

    32 f01 3516121600 cavity as kor-4a070s 1 f02 3511415700 cover wave guide pp 5113mf6 1 f03 3517209710 motor syncro 49tyd -5b 1 f04 7121400611 screw tapping t2s pan 4x6 mfzn 1 f05 3517400620 coupler xarec 1 f06 3518907010 thermostat off:120 on:60 h #187 1 f07 7121300611 screw tapping t2s pan 3x6 mfzn ...

  • Page 34

    S/m no. : or4a0b0w001 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” printed date: jan. 2011.

  • Page 35: About This Manual

    V viis siio on n c cr re ea at tiiv ve e,, iin nc c.. 서울 종로구 통의동 6 번지 이룸빌딩 4 층 about this manual about this manual 담 당 장형석 님 m o d e l kor-4a0b0w (s/m) 접 수 2011.01.07 1차 2차 일 정 3차 4차 5차 제 판 한 인 인 쇄 쇄 규 격 memo 총 34p 연락처 vision 담 당 방 문 수 tel: 730-0660 fax: 730-3788 11.01.07-전체신규 34p 11.01.10-17p, 25p ...