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Daewoo KOR-146HS Service Manual - Door Assembly : 3511713550

Summary of KOR-146HS

  • Page 1

    Service manual model : kor-146hs microwave oven jul. 2009 s/m no. : kor-146hw.

  • 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 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 s...

  • Page 4: Specifications

    3 specifications power supply 127v ac, 60hz single phase with grounding input power 1400 w microwave energy output 1000 w frequency 2,450mhz outside dimensions (w h d) 563 x 318 x 420 mm (22.2 x 12.5 x 16.5 in.) cavity dimensions (w h d) 380 x 246 x 386 mm (15.0 x 9.7 x 15.2 in.) cavity volume 1.3 c...

  • Page 5

    4 2. Features diagram kor-1 4 6h w / kor-1 4 6h s 1 1 door latch - when the door is closed, it will automatically 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 c...

  • Page 6

    5 3. Control panel kor-1 4 6h w / kor-1 4 6h s 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 one touch cook - used to cook or specific quantities of food. 4 auto cook - used to reheat or cook ma...

  • Page 7: Installation

    6 6. Examine the oven after unpacking for any damage such as: a misaligned door, broken door or a dent in cavity. If any of the above are visible, do not install, and notify dealer immediately. 1. Steady, flat location. This microwave oven should be set on a steady, flat surface. 2. Leave space behi...

  • Page 8: Operations and Functions

    7 operations and functions 1. Connect the mains lead to an electrical outlet. 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 during cooking. 3. Close the door securely. 4. The oven door can be opened at any t...

  • Page 9: 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 10

    9 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. Note : after replacing the door ...

  • Page 11: Door Assembly : 3511713540

    1 0 3. To remove door parts. Kor-1 4 6h w (1) remove the gasket door from the door painting assembly. (2) remove the barrier screen inner from the door painting assembly. (3) remove the frame door from the door painting assembly. (4) remove the stopper hinge top assembly from the door painting assem...

  • Page 12: Door Assembly : 3511713550

    1 1 door assembly : 3511713550 kor-1 4 6h s (1) remove the gasket door from the door painting assembly. (2) remove the barrier screen inner from the door painting assembly. (3) remove the frame door from the door painting assembly. (4) remove the stopper hinge top assembly from the door painting ass...

  • Page 13

    1 2 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 surface. • tighten two screws. (2) to reduce gap located on part ‘b’...

  • Page 14

    1 3 5. To remove control panel parts. Kor-1 4 6h w 1) remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly. 2) remove four screws which secure the pcb assembly to control panel. 3) disconnect wire flat from the connector of the pcb assemb...

  • Page 15

    1 4 1) remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly. 2) remove four screws which secure the pcb assembly to control panel. 3) disconnect wire flat from the connector of the pcb assembly. 4) remove the pcb from the control panel. 5...

  • Page 16

    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. To remove magnetron. 1) rem...

  • Page 17

    1 6 8. 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. (1) primary interlock sw...

  • 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 magnetron result no continuity cause remedy replace outlet has proper voltage fuse does not blow. Condition check check continuity of primary interlock switch malfunction of primary interlock switch result no continuity cause remedy adjust o...

  • Page 21

    2 0 (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 transformer remedy replace no microwave oscillation check continuity of high voltage rectifie...

  • Page 22

    2 1 (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 ch...

  • Page 23: Measurement and Test

    2 2 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 rat...

  • Page 24

    2 3 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(3.7in.). 3. Place it at the cente...

  • Page 25

    2 4 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 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 2. Voltage check - key check point - check method note 1. Refer to circuit diagram. 2. Secondary side v...

  • Page 28

    2 7 measurement point mp1 mp2 gnd.

  • Page 29

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

  • Page 30

    29 2. Pcb circuit diagram kor-1 4 6h w / kor-1 4 6h s.

  • Page 31

    3 0 ✔ 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). 3. Pcb location no. Kor-1 4 6h 1 buzz...

  • Page 32: Exploded View and Parts List

    3 1 1. Door assembly refer to disassembly and assembly. 2. Control panel assembly refer to disassembly and assembly. 3. Total assembly kor-1 4 6h w / kor-1 4 6h s exploded view and parts list.

  • Page 33

    39 a00 3511713540 door as kor-136h9a27 1 b00 pkcpswxx20 control-panel as kor-136h9a27 1 f01 3510806600 cabinet as kor-131g0s 1 f02 7112401011 screw tapping t1 trs 4*10 mfzn 4 f03 3516111500 cavity as kor-131g0a 1 f04 7122401211 screw tapping t2s trs 4x12 mfzn 1 f05 7122401211 screw tapping t2s trs 4...

  • Page 34

    33 a00 3511713550 door as kor-136h9a52 1 b00 pkcpswxx50 control-panel as kor-136h9a52 1 f01 3510803130 cabinet t0.6 sv14012 1 f02 7112401011 screw tapping t1 trs 4*10 mfzn 4 f03 3516111500 cavity as kor-131g0a 1 f04 7122401211 screw tapping t2s trs 4x12 mfzn 1 f05 7122401211 screw tapping t2s trs 4x...

  • Page 35

    S/m no. : 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: jul. 2009.