Daewoo KOG-1A0A Service Manual - Disassembly and Assembly

Summary of KOG-1A0A

  • Page 1

    S/m no. : daewoo electronics corp. 686, ahyeon-dong mapo-gu seoul, korea c.P.O. Box 8003 seoul, korea telex: dwelec k28177-8 cable: “daewooelec” printed date: may. 2005.

  • Page 2: Service Manual

    Service manual microwave oven model: kog-1a0a9a kog-1a6a9a s/m no. : may. 2005 ✔ 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 infor...

  • Page 3: 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 4: 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 5: Specifications

    4 specifications model kog-1a0a9a, 1a6a9a power supply 120v~60h z , single phase with earthing power microwave 1400w consumption grill 1150w microwave energy output 1000w microwave frequency 2450mhz outside dimensions (w x h x d) 539x300x406mm(21.2x16.0x11.8 in.) cavity dimensions (w x h x d) 354x22...

  • Page 6: External View

    5 external view 539 406 300 1. Outer dimension.

  • Page 7

    1 w e 5 6 7 0 4 9 8 q r 3 2 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 8

    7 2 r 8 6 7 1 0 w 4 9 3 5 q e m/w less more stop/clear grill defrost fish poultry auto defrost meat auto cook 1. Bread 2. Soup 3. Baked potato 4. Fresh vegetable 5. Frozen vegetable m/w defrost grill timer/lb start/speedy cook kitchen timer clock 1 2 3 0 4 5 6 7 8 9 beverage pasta frozen pizza dish ...

  • Page 9: Installation

    8 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 10: 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 11: 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 12

    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 13

    12 3. To remove door parts. Ref no. Part code part name description q’ty a01 3512204330 frame door kog-1a0a9a 1 3512204340 kog-1a6a9a a02 3517005900 barrier screen *o petp t0.25 1 a03 3515202900 stopper hinge *t as kor-121m0a 1 a04 3511711300 door painting as kor-1a1g0a 1 a05 3517005800 barrier scre...

  • Page 14

    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 15

    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 three screws which secure the pcb assembly to control panel. (4) disconnect m...

  • Page 16

    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 17

    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 reassem...

  • Page 18

    17 11. To remove insulator heater assembly. 1) remove the hex nut (f09). 2) remove the two hex nuts (f43). 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 19

    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 20: 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 21

    20 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 22

    21 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 rectifier in forward and backward direction with dc megger continuity in back...

  • Page 23

    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 24: 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 25

    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. 95 mm(3.5 in.). 3. Place it at ...

  • Page 26

    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 27: Wiring Diagram

    26 wiring diagram.

  • Page 28: 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: 120v / frequency: 60hz 2. Voltage check - key check point - check method note 1. Refer to ciruit diagram (point 4). 2. Seconda...

  • Page 29

    28 mp1 mp2 mesure point.

  • Page 30

    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 31

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

  • Page 32

    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 33: 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.

  • Page 34

    33 ref no part code part name description q'ty a00 3511711230 door as kog-1a0a9a 1 3511711240 kog-1a6a9a b00 pkcpswx820 control panel as kog-1a0a9a 1 pkcpswap40 kog-1a6a9a c00 3513302410 insulator heater as kog-211m0a 1 f01 3510805500 cabinet as kor-1a1g0a 1 f02 3516004100 special screw t1 trs lr4 p...

  • Page 35

    34 ref no part code part name description q'ty f34 3513601500 lamp bl 125v 25w t25 c5a h187 1 f35 7121400611 screw tapping t2s pan 4x6 mfzn 1 f36 3966820200 motor syncro 120v 2w gm-16-12f17 1 f37 3518905400 thermostat off:90 on:60 h#187 nb 1 f38 3513003410 holder thermostat pp 1 f39 7272400811 speci...

  • Page 36: About This Manual

    담 담 당 당 주 주홍 홍준 준님 님 t te el l m mo od de el l kog-1a0a9a,1a6a9a 접 접 수 수 0 05 5..0 05 5..1 11 1 1 차 6 차 2 차 7 차 일 일 정 정 3 차 8 차 4 차 9 차 5 차 10 차 제 제 판 판 인 인쇄 쇄 규 규 격 격 m me em mo o 05.05.11-(kog-131a9a11:파일없음,kog-131a0a 만듬) 표지,4,5,12,14,31,32.33,34p 수정 연 연락 락처 처 v viis siio on n 담 담 당 당 이 지 혜 tel: 7...