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Daewoo KOG-180A0S Service Manual

Manual is about: Daewoo KOG-180A0S Microwave Oven

Summary of KOG-180A0S

  • Page 1

    S/m no. : g131a0s001 service manual microwave oven model: kog-180a0s daewoo electronics co., ltd. S/m no. : g180a0s001 http : //svc.Dwe.Co.Kr feb. 2002 ✔ 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 ...

  • Page 2: Table of Contents

    2 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 microwav...

  • Page 3: Safety and Precautions

    Safety and precautions caution : this device is to be serviced only by properly qualified service personnel. 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. For ...

  • Page 4: Specifications

    4 specifications model kog-180a0s power supply 230v~50h z , single phase with earthing microwave 1400w power grill 1150w consumption combination 2500w microwave energy output 1000w microwave frequency 2450mhz outside dimensions (w x h x d) 589x339x488mm cavity dimensions (w x h x d) 399x278x452.1mm ...

  • Page 5: External View

    5 external view 589 339 488 1. Outer dimension.

  • Page 6

    1 w e 4 5 6 r 2 3 9 8 q 0 7 6 1. Door seal door seal maintains the microwave within the oven cavity and prevents microwave leakage. 2. Door hook when door is closed, it will automatically lock shut. If door is opened while oven is operating, magnetron tube will immediately stop operating. 3. Door sc...

  • Page 7

    7 combi grill defrost power kitchen timer clock fish poultry meat 1hour 10 min 10min. 1 min 1min. 10 sec 1. Bread 2. Soup 3. Baked potato 4. Fresh vegetable 5. Frozen vegetable kog-180a dish warmer frozen pizza beverage pasta auto cook m/w def. Grill combi timer/g 7 1 3 2 5 r t 6 4 9 q 0 stop/clear ...

  • Page 8: Installation

    8 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...

  • Page 9: Operations and Functions

    9 operations and functions 1. Connect the main 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. When the oven door is opened, the lig...

  • Page 10: Disassembly and Assembly

    10 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 possibl...

  • Page 11

    11 1. To remove cabinet 1) remove three screws on cabinet back. 2) push 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

    12 3. To remove door parts. Ref no. Part code part name description q’ty a01 3512205100 frame door abs sg-175, sg-0760d 1 a02 3517007400 barrier-screen*o san t1.5 1 a03 3515204400 stopper hinge *t as kor-162joa 1 a04 3516601600 door plate secc 1 a05 3517005200 barrier-screen*i pe t0.1 1 a06 35123018...

  • Page 13

    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 stopper hinge top, and then push the door to contact the door seal to oven front surface. • tighten two screws. (2) to reduce gap located on part ‘b’. • loos...

  • Page 14

    14 5. To remove control panel parts. (1) remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly. (2) remove the door open lever from the control panel. (3) remove four screws which secure the pcb assembly to control panel. (4) disconnect me...

  • Page 15

    15 note : never install the magnetron without the metallic gasket plate which is packed with each magnetron to prevent microwave leakage. Whenever repair work is carried out on magnetron, check the microwave leakage. It shall not exceed 4mw/cm 2 for a fully assembled oven with door normally closed. ...

  • Page 16

    16 9. To remove wind guide assembly. 1) remove a screw which secure the wind guide assembly. 2) draw forward the wind guide assembly. 3) pull the fan from the motor shaft. 4) remove two screws which secure the motor shaded pole. 5) remove the motor shaded pole. 6) reverse the above steps for reasemb...

  • Page 17

    17 11. To remove insulator heater assembly. 1) remove the two hex nuts (f44). 2) remove the hex nuts (f10). 3) remove the insulator heater assembly (c00). 4) reverse the above steps for reassembly. 1) remove the hex nuts (c04). 2) remove the insulater heater (c01) and heater (c02). 3) remove the two...

  • Page 18

    18 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: Trouble Shooting Guide

    19 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 tran...

  • Page 20

    20 note 1 all these switches must be replaced at the same time, please refer to “interlock mechanism and adjustment”. (trouble 2) display shows all figures selected, but oven does not start cooking, even though desired program and time are set and start pad is tapped. Condition check check continuit...

  • Page 21

    21 (trouble 3) no microwave oscillation even though fan motor rotates. Condition check check continuity of high voltage fuse result no continuity check continuity if high voltage capacitor terminals with wires removed replace high voltage fuse continuity cause defective high voltage transformer reme...

  • Page 22

    22 (trouble 4) the following visual conditions indicate a probable defective touch control circuit or membrane switch assembly 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 po...

  • Page 23: Measurement and Test

    23 measurement and test 1. Measurement of the microwave power output microwave output power can be checked by indirectly mmeasuring 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...

  • Page 24

    24 2. Microwave radiation test procedure 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 600 cc glass beaker with an inside diameter of approx. 8.5cm(3.5 in.). 3. Place it at ...

  • Page 25

    25 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

    26 wiring diagram gn : green br : brown : off cook door : closed condition gm : geared motor [ cl : cavity lamp fm : fan(blower) motor rd : red wh : white bk : black or : orange bl : blue gy : gray ] ge : green/yellow note : heater 3 2 1 gy monitor switch interlock secondary interlock switch com nc ...

  • Page 27: Printed Circuit Board

    27 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 2. Voltage check - key check point - check method note 1. Refer to ciruit diagram (point 4). 2. Seconda...

  • Page 28

    28 mp1 mp2 mesure point.

  • Page 29

    29 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. ✻ cause : relay 2 does not operate. → refer to circuit diagram (point 3) - check method 2) when touching start pad, oven lamp turns ...

  • Page 30

    30 2. P.C.B. Circuit diagram.

  • Page 31

    31 no name symbol specification part code q’ty 1 buzzer bz1 bm-20k 3515600100 1 2 c array ca1 7p(6) 102 m 50v cn6xb-102m 1 3 capacitor elec ec1 50v rs 1µf cexe1h109a 1 4 cpapcitor elec ec2 25v rss 1000µf cexf1e102v 1 5 connector wafer cn1 yw396-02av 3519150520 1 6 connector waffr cn2 yw396-05av 3519...

  • Page 32: Exploded View and Parts List

    32 exploded view and parts list 1. Door assembly refer to disassembly and assembly 2. Control panel assembly refer to disassembly and assembly 3. Total assembly f40 f42 f41 b00 a00 f39 f38 f36 f33 f35 f34 f32 f31 f27 f30 f29 f28 f26 f45 f43 f48 f46 f50 f49 f01 f05 f04 f02 f03 f06 f07 f08 f25 f24 f22...

  • Page 33

    33 ref no part code part name description q'ty a00 3511715500 door as kor-180a0a 1 b00 pkcpswac60 control panel as kog-180a0s(1000w) 1 c00 3513303500 insulator heater as kog-180a0s 1 f01 3510802400 cabinet secc t0.6 1 f02 7112401011 screw tapping t1 trs 4*10 mfzn 4 f03 3516114600 cavity as kog-180a0...

  • Page 34

    34 ref no part code part name description q'ty f33 4415a66910 sw micro vp-531a-of/szm-v16-fa-61 1 f34 4415a66910 sw micro vp-531a-of/szm-v16-fa-61 1 f35 3513702600 lever lock pom 1 f36 3513814300 lock pom m90-02 f20 1 f37 3518571000 switch push mp101c 1 f38 3513601600 lamp bl 240v 25w t25 c7a h187 1...

  • Page 35

    S/m no. : g180a0s001 daewoo electronics co., ltd. 686, ahyeon-dong mapo-gu seoul, korea c.P.O. Box 8003 seoul, korea telex: dwelec k28177-8 cable: “daewooelec” fax: 02) 360-8184 tel: 02) 360-8183 e-mail : g7f00e@web.Dwe.Co.Kr printed date: feb, 2002.