Daewoo KOG-867T Service Manual - Disassembly and Assembly

Other manuals for KOG-867T: Operating Instructions Manual, Service Manual
Manual is about: & toaster

Summary of KOG-867T

  • Page 1

    Service manual model : kog-867t microwave oven & toaster sep. 2003 s/m no. : g867t9a001.

  • 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 Andprecautions

    Safety andprecautions 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 s...

  • Page 4: Specifications

    4 warning: this appliance must be grounded. Specifications important the wires in this mains lead are colored in accordance with the following code. Green-and-yellow : earth blue : neutral brown : live as the colors of the wires in the mains lead of this appliance may not correspond with the colored...

  • Page 5: External View

    5 external view 1. Outer dimension.

  • Page 6

    Microwave oven toaster 2 3 4 5 0 9 8 7 6 w q 1 6 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. Door seal the door seal maintains the microwave within the oven cavity and prevents ...

  • Page 7

    7 3 5 1 t r u 4 6 2 9 8 7 e w 0 q y 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. Toast bread - used to reheat bread. 4. Toast bagel - used to reheat bagel. 5. Toast stop/clear - used to stop...

  • 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

    Once p-hi 100% twice p-90 90% 3 times p-80 80% 4 times p-70 70% 5 times p-60 60% 6 times p-50 50% 7 times p-40 40% 8 times p-30 30% 9 times p-20 20% 10 times p-10 10% 11 times p-00 0% touch microwave pad power level (display) approximate percentage of power 9 operation procedure(microwave oven) the ...

  • Page 10: Important

    10 important before using the toaster for the first time, operate the toaster without bread in order to burn off residues on the heating elements. You will notice an odor that is characteristics of new heating elements. This is normal and will soon disappear. Cleaning the toaster always unplug the m...

  • Page 11: Operation Procedure(Toaster)

    11 operation procedure(toaster) the toaster drawer can be opened at any time during operation by pulling out the toaster handle on the toaster drawer. The toaster will automatically shut off. Touch the bread or bagel pad of toast menu and the degree of darkness will be displayed. Each time a pad is ...

  • Page 12: Disassembly and Assembly

    12 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 13

    13 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 14

    14 3. To remove door parts. Ref no. Part code part name description q’ty a01 3517008600 barrier screen*o san t1.5 1 a02 3511724400 door sub as kog-867t9 1 a03 3511711800 door painting as kor-86670s 1 a04 3515204100 stopper hinge*t as kor-63150s 1 a05 3517006000 barrier screen*i pe t0.1 1 a06 3512302...

  • Page 15

    15 4. Method to reduce the gap between the door seal and the oven front surface. (1) to reduce gap located on part ‘a’. • loosen the screw on stopper hinge top, and then push the door to contact the door seal to oven front surface. • tighten the screw. (2) to reduce gap located on part ‘b’. • loosen...

  • Page 16

    16 5. To take off the toaster assembly. (1) remove four screws on the toaster assembly. (2) lift up the toaster assembly and pull it out. (3) reverse the above for assembly. Note : to assemble the toaster assembly, push two taps on the side of the toaster front plate into two rectomgular holes of th...

  • Page 17

    17 6. 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 18

    18 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 19

    19 10. 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 reasem...

  • Page 20

    20 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 21: Trouble Shooting Guide

    21 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 22

    22 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 pressed. Condition check check continui...

  • Page 23

    23 (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 defective high voltage fuse remedy 1 replace no microwave oscillation check contin...

  • Page 24

    24 (trouble 4) toaster heater is not heated; bread or bagel will not toast. Condition check check continuity of spring flat malfunction of spring flat result no continuity cause remedy cause remedy adjust or replace toaster heater is not heated. Check d.C voltage being supplied to relay (ry3) coil f...

  • Page 25

    25 (trouble 6) 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 26: Measurement and Test

    26 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 27

    27 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 28

    28 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 29: Wiring Diagram

    29 wiring diagram.

  • Page 30: Printed Circuit Board

    30 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 31

    31 mp1 mp2 mesure point.

  • Page 32

    32 3. When there is no microwave oscillation 1) when touching start pad, oven lamp turns on and turntable rotates. But cook indicator in display comes on. ✻ cause : relay 4 does not operate. → refer to circuit diagram (point 3) - check method 2) when touching start pad, oven lamp turns on. Fan motor...

  • Page 33

    33 2. P.C.B. Circuit diagram.

  • Page 34

    34 no name symbol specification part code q’ty 1 pcb main m253 82x153 3514329800 1 2 buzzer bz1 bm-20k 3515600100 1 3 c array ca1 7p(6) 1000pf m 50v cn6xb-102m 1 4 c cera c1~c6,c8 50v 104z axial cczf1h104z 7 5 c cera c7 50v 102z axial cczb1h102k 1 6 c electro ec1 50v rs 1mf cexe1h109a 1 7 c electro ...

  • Page 35: Exploded View and Parts List

    35 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 36

    36 no part code part name description q'ty a00 3511724200 door as kog-867t9a02 1 b00 pkcpsway00 control panel as kog-867t9a02 1 c00 3510021100 assy toaster kog-867t9a02 1 f01 3510808010 cabinet sts430 t0.5 h/l 1 f02 3516004100 special screw t1 trs lr4 pole 4x10 mfzn 4 f03 3516109900 cavity as kor-86...

  • Page 37

    37 no part code part name description q'ty f34 3513601500 lamp bl 120v 25w t25 c5a h187 1 f35 5f1cd2031s fuse 125v 20a 65ts 1 f36 3512767900 harness main kog-867t9a02 1 f37 7121400611 screw tapping t2s pan 4x6 mfzn 1 f38 3966821000 motor syncro 120v 60hz tyj50-8 1 f39 7272400811 screw taptite tt3 tr...

  • Page 38

    38 4. Toast assembly (c00).

  • Page 39

    39 no part code part name description q'ty c01 3510021300 assy panel top kog-867t9a02 1 c02 3511410800 cover front pbt 1 c03 7112401011 screw tapping t1 trs 4x10 mfzn 2 c04 3514501900 plate front sbhg t0.6 1 c05 7122401211 screw tapping t2s trs 4x12 mfzn 1 c06 3514502000 plate side secc t0.5 1 c07 7...

  • Page 40

    S/m no. : g867t9a001 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: sep. 2003.