Daewoo KOG-361Q Service Manual - Microwave Energy

Summary of KOG-361Q

  • Page 1

    Service manual microwave oven kog-361q, kog-362q, kog-364q kog-381q, kog-382q, kog-384q kog-388q daewoo electronics co., ltd..

  • Page 2: Microwave Energy

    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 door open. (b) make the following safety checks on all ovens to be serviced before activating the mag- netron or other microwave ...

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    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 appli- ance. (only a trained service personnel s...

  • Page 4

    * specifications subject to change without notice. Power supply microwave power consumption grill combination microwave energy output microwave frequency outside dimensions (w x d x h) cavity dimensions (w x d x h) net weight timer function selections microwave power levels kog-361q/362q/364q kog-38...

  • Page 5

    1 door latch–when the door is closed it will automatically lock shut. 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 pre- vents microwave leakage. 3 oven cavity. 4 spatter shil...

  • Page 6

    This appliance must be earthed. In the event of an electrical short circuit, earthing reduces the risk of electric shock by providing an escape, wire for the electric current. This appliance is equipped with a cord having a earthing wire with a earthing plug. The ploug must be plugged into an outlet...

  • Page 7

    Approximate percentage of power 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% this section includes useful information about oven operation. 1. Plug power supply cord into a 230v 50hz power outlet. 2. After placing the food in a suitable container, open the oven door and put it on the glass tray. The ...

  • Page 8

    When the oven is first plugged in, the display will flash “ : 0” and a tone will sound. If the ac power ever goes off, the display will flash “ : 0” when the power comes back on. Do this this happens... 7 setting the clock 1. Touch clock/ a.Start pad. This is a 12 hour clock system. Clock/ a.Start 2...

  • Page 9

    Weight defrost lets you easily defrost food by eliminating guesswork in determining defrosting time. The minimum weight for weight defrost is 200 grams. The maximum weight for weight defrost is 3000 grams. Follow the steps below for easy defrosting. 8 weight defrosting do this this happens... 1. Tou...

  • Page 10

    When time defrost is selected, the automatic cycle divides the defrosting time into periods of alternating defrost and stand times by cycling on and off. 9 time defrosting do this this happens... 1. Touch auto defrost pad. The weight defrost indica- tor lights and “0” is displayed. And the g indicat...

  • Page 11

    10 cooking in one stage do this... This happens... 1. Touch power pad. The m/w indicator lights and “p- ” is displayed. Power 4. Touch start pad. When you touch start pad, the m/w indicator starts blinking to show the oven is cooking. The display counts down the time to show how much cooking time is...

  • Page 12

    11 grill cooking this function allows you to brown food quickly. The heating element is located in the top of the oven. There is no pre-heating the oven for grill cooking. Place food inside the oven when setting the con- trols. Do this... This happens... 1. Touch grill pad. The grill indicator light...

  • Page 13

    Combi cooking this oven has combination mode which cooks food with heater and microwave at the same time. The combination mode accelerates the cooking process. Do this... This happens... Category touch pad approximate percentage of microwave power 12 1. Touch combi pad. The combi indicator lights an...

  • Page 14

    13 auto start allows you to program cooking to start at a time you select. The food will automatically start cooking at the desired time. Do this... This happens... 1. Program the desired power level and cooking time. 2. Touch clock/ a.Start pad. The auto start indicator lights and “ :0” is displaye...

  • Page 15

    14 to check auto start time once you have correctly programmed the oven for auto start, the present time will appear on the display. Do this... This happens... Speedy cook speedy cook allows you to reheat for 30 seconds at 100% (full power) by simply touching the speedy cook pad. By repeatedly touch...

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    15 one touch cooking one touch cook allows you to cook or reheat many of your favorite foods by touching just one pad. To increase quantity, touch chosen pad until number in display is same as desired quantity to cook. (except for dinner plate) do this... This happens... Do this... This happens... 1...

  • Page 17

    Do this... This happens... Do this... This happens... 16 * beverage * (250ml/cup) • 1 cup (mug): touch beverage once. • 2 cups (mugs): touch beverage twice within 1.5 seconds. • 3 cups (mugs): touch beveragethree times within 1.5 seconds. Note: 1. This setting is good for restoring cooled beverage t...

  • Page 18

    17 do this... This happens... Do this... This happens... 1. Touch fresh vegetable pad. When you touch fresh veg- etable pad, “200” is displayed. After the 1.5 seconds, the dis- play changed into cooking time of quantity and the oven starts cooking. Fresh vegetable 1. Touch baked potato pad. When you...

  • Page 19

    Feeding bottle this key is for feeding bottle disinfection effect. At first, detach the nipple from the bottle and pour the 30cc water into each bottle, arrange the bottle symmetrically on the glass tray and operate. Do this... This happens... More, less more pad: adds for 10 seconds to 20 seconds. ...

  • Page 20

    The door lock mechanism is a device 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 switch when the door is closed, the hook locks...

  • Page 21

    Symbol rd bl bk wh gy color red blue black white gray (2) secondary interlock switch and interlock monitor switch when the door is closed, the hook pushes the push lever down ward, and push lever presses the button of the interlock monitor switch to bring it under “off”, condition and presses the bu...

  • Page 22

    – cautions to be observed when trouble shooting. Unlike many other appliances, the microwave oven is a high-voltage, high-current equipment. It is completely safety during normal operation. However, carelessness in servicing the oven can result in an electeric shock or possible danger from a short c...

  • Page 23

    1. To remove cabinet. Remove three screws (f02) on cabinet back. 2. To remove door assembly. 1) remove two screws (f40) which secure the top hinge seoppr (f37). 2) remove the door assembly (f00) from the top plate of cavity. 3) reverse the above for reassembly. 3. To remove door parts. 22 disassembl...

  • Page 24

    (1) remove the gasket door (a06) from door plate (a04). (2) remove the barrier screen inner (a05) from door plate (a04). (3) remove the door frame (a02) from door plate (a04). (4) remove the top hinge stopper (a03) from door plate (a04). (5) remove the spring (a08) and the hook (a07). (6) remove the...

  • Page 25

    5. To remove control panel parts. (1) remove the screw which secur the con- trol panel, push up two snap fits and draw forward the control panel assenbly. (2) remove the door open lever (b05) from the control panel (b02). (3) remove three screws (b04) which secure the p.C.B. Ass’y (b03). (4) remove ...

  • Page 26

    6. To remove high voltage capacitor. (1) remove the screw (f13) which secure the grounding ring terminal of diode (f16) and capacitor holder (f14). (2) remove the capacitor holder (f14) with capacitor (f15). (3) reverse the above steps for reassembly. High voltage circuit wiring 7. To remove magnetr...

  • Page 27

    8. To remove fan motor assembly. (1) remove two screws (f08) which secure the back cover (f10) from the cavity outer. (2) remove two screws (f09) which secure the fan motor (f11) from the back cover (f10). (3) pull out the fan (f12) from the motor (f11). (4) remove the above steps for reassembly. 9....

  • Page 28

    10. To remove insulator heater assembly. (1) remove the four hex nuts 1. (2) remove the insulator heater assembly 2. (3) reverse the above steps for reassembly. 11. To remove heater part. (1) remove the hex nut 4. (2) remove the insulater heater 1 and heater 2. (3) remove the two screws 5. (4) rever...

  • Page 29

    Following the procedures below to check if the oven is defective or not. 1. Check grounding before checking trouble. 2. Be careful of the high voltage circuit. 3. Discharge the high voltage capacitor. (see page 21) 4. When checking the continuity of switches or of the high voltage transformer, disco...

  • Page 30

    (trouble 2) digital readout display does not show programming, even if the mem- brane keyboard is programmed by touching proper pads. Membrane keyboard check procedure 1. Check the pad termination order and nomenclature. Fig. 4 29 check result cause cause replace control box sub- assembly check each...

  • Page 31

    2. Type of encoding and pad names. Fig. 8 key matrix the membrane keyboard consists of 27 keys whose configurations are described above and provide 11 pad terminations to be connected to the touch control circuit as fig. 7. 3. Key check procedure. To determine if the membrane keyboard is defective o...

  • Page 32

    (trouble3) the oven not operate at all; display window does not display any figures and any inputs can not be accepted. 31 check result cause cause replace primary interlock switch and secondary interlock switch and monitor interlock switch. Check continuity interlock monitor switch with door closed...

  • Page 33

    (trouble 4) display shows all figures selected, but oven does not start cooking, even though desired program and time are and start pad is taped. 32 check result cause cause replace check continuity of oven thermostat condition no continuity defective oven thermostat. Replace check continuity of pow...

  • Page 34

    (trouble 5) no microwave oscillation even though fan motor rotates. 33 check result cause cause replace check continuity of primary wind- ing of high voltage transformer and touch control circuit condition turn table motor, fan motor and oven lamp turn on for a second when the start pad is tapped no...

  • Page 35

    (trouble 6) micrwave output power is low . First of all, check if output power is really low following “measurement of the microwave output power” on page 35. 34 check result cause cause customer education check the power source voltage with magnetron oscillating condition output power is low. Lower...

  • Page 36

    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. Proedure 1. Microwave power output measurement is made with the microwave oven supplied at rated voltage and operated at its maximum microwave p...

  • Page 37

    Procedure a) prepare microwave energy survey meter, 600cc glass breaker, glass thermometer 100°c or 212°f. B) pour 275cc±15cc of tap water initially at 20±5°c (68±9°f) in the 600cc beaker with an inside diam- eter of approx. 8.5 cm (3.5 in). C) place it at the center of the tray and set it in a cavi...

  • Page 38

    37 wiring diagram (germany).

  • Page 39

    38 wiring diagram.

  • Page 40

    Refer to the “wiring diagram” on page 37. Microwave cooking time cooking 1. When the food is placed inside the oven and door is closed. 1) the low voltage transformer supplies the necessary voltage to the touch control circuit when the power cord is plugged in. 2) the contacts of the interlock monit...

  • Page 41

    Fig. 2 the touch control circuit controls the on-off time of relay “1” in order to vary the output power of the microwave oven from “power level 1“ to “hi (100%) power”. One complete on and off cycle of the relay “1” is 29 seconds. The relation between indications on the control panel and the output...

  • Page 42

    Fig. 3 auto defrost cycle when auto defrost is selected and the desired defrosting time is chosen, the automatic cycle divides the defrosting time into 5 periods of alternating defrost and stand times, by cycling on and off. 4. When the door is opened during cooking. 1) the primary interlock switch ...

  • Page 43

    1. High voltage is present at the high voltage terminal of the high voltage transformer during any cook- ing cycle. 2. It is neither necessary nor advisable to attempt measurement of the high voltage. 3. Before touching any oven components or wiring, always unplug the oven from its power source and ...

  • Page 44

    • disconnect the oven from the power supply. • you can test continuity of safety interlocks and monitor switch by using switch tester or ohmmeter. • the switch operation is checked by the lamp on/off of resistance zero/unlimited. • the sequence of check is interlock monitor switch; primary and secon...

  • Page 45

    1. Circuit check procedure 1) low voltage transformer (dmr-604fs) 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 44 printed circuit board note 1: secondary side voltage of the low volt...

  • Page 46

    3) display problems the display trouble shooting data 4) when there is no microwave oscillation. (1) when touching “start” pad, oven lamp does not turn on. Fan motor and turntable motor do not rotate, but cook indicator in display comes on. * cause: relay “2” does not operate. 45 no. Cause measureme...

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    Fig. 6 measurement point 46.

  • Page 48

    Check method (2) when touching “start” pad, oven lamp turns on. Fan motor and turntable rotate and cook indicator in display comes on. * cause: relay “1” does not operate. Check method 5) when the door is opened during operation, the count down timer does not stop. Check method 47 point a stage rela...

  • Page 49

    5) when the digital clock does not operate properly. If clock does not keep exact time, you must check resistor r11, r17. 7) when there is not grill heat. When touching “start” pad, oven lamp turns on. Fan motor and turntable rotate and cook indicator in display comes on. * cause: relay “4” does not...

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    2. Component information 1) transistor 2) diode and zener diode 49.

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    3. Printed circuits board 50

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    4. P.C.B. Circuit diagram 51.

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    52 5. P.C.B. Location no. Ref no. Part code part name description remark r10, 13, 18, 26 rd-az472j- resistor 4.7 kohm, 1/6w, 5% r3 rd-az201j- resistor 200 ohm, 1/6w, 5% r5, 8 rd-az203j- resistor 20 kohm, 1/6w, 5% r1 rd-az105j- resistor 1 mohm, 1//6w, 5% r2, 4, 6, 9, 15, 20 rd-az102j- resistor 1 kohm...

  • Page 54

    1. Door assembly kog-36xx kog-38xx ref no. Part code part name description q’ty remark 3511706010 kog-3615os only kog-361q 3511707310 door assembly kog-3625os 1 only kog-362q 3511706030 kog-3645os only kog-364q 3517003000 only kog-361q a01 3517003020 barrier-screen * o pmma 1 only kog-362q 351700303...

  • Page 55

    Ref no. Part code part name description q’ty remark pkcpswsc00 kog-361qos only kog-361q pkcpswsd00 control panel as kog-362qos 1 only kog-362q pkcpswsk00 kog-364qos only kog-34q 3518514600 kog-361qos only kog-361q b01 3518515400 switch membrane kog-362qos 1 only kog-362q 3518515700 kog-364qos only k...

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    55.

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    56 ref no. Part code part name description q’ty remark f01 3510801300 cabinet pcm t0.6 1 only kog-36xx 3510801400 only kog-38xx f02 7s312x4081 screw tapping t1 trs 4 x 8 se mfzn 3 f03 3516105010 cavity weld as kog-381qos 1 only kog-38xx 3516104910 kog-361qos 1 only kog-36xx f04 7s342x40b1 screw spec...

  • Page 58

    57 ref no. Part code part name description q’ty remark f29 5s762s10g0 sw micro v16-fa-63 spno 2 f30 5s762310g0 sw micro v16-fa-61 2c 3p 1 f31 5s762s10g0 sw micro v16-fa-63 spno 1 f32 3513701300 lever lock pom 1 f33 3513805700 lock pom black 1 f34 3513601600 lamp bl 240v 25w t25 c7a h1 1 f35 35186037...