1. DL manuals
  2. Daewoo
  3. Microwave Oven
  4. KOG-37250S
  5. Service Manual

Daewoo KOG-37250S Service Manual

Other manuals for KOG-37250S: Operating Instructions Manual
Manual is about: Daewoo KOG-37250S; KOG-39250S Microwave Oven

Summary of KOG-37250S

  • Page 1

    Service manual microwave oven model: kog-37250s kog-39250s daewoo electronics co., ltd. S/m no. : g37250s001 ✔ 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...

  • Page 2

    Safety and precautions ........................................................................................................ 2 specifications ............................................................................................................................ 3 external view .................

  • Page 3

    Safety and precautions 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 traine...

  • Page 4

    Specifications specifications are subject to change without notice. M o d e l k o g -37250s k o g -39250s p o w e r s u p p ly 230v ~50h z, sin g le p h a se w ith e a r t h in g p o w e r c o n su m pt io n m ic ro w ave 1200w 1350w g r ill 1050w 1050w c o m b in at io n 2200w 2350w m ic r o w av e...

  • Page 5

    External view 1. Outer dimension (kog-3725 / kog-3925) 465/495 279/294 360/388 fig2. Side view fig1. Front view.

  • Page 6

    External view 2. Feature diagram 1) door seal - door seal maintains the microwave energy within the oven cavity and prevents microwave leakage. 2) reflector (insulator heater) 3) heating element 4) oven cavity 5) safety interlock system 6) knob v.P.C - used to select a microwave power level. 7) knob...

  • Page 7

    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 8

    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. Choose cooking power level by setting v...

  • 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 safety during normal operation. However, carelessness in servicing the oven can result in an electric shock or possible d...

  • Page 10

    Disassembly and assembly 1. To remove cabinet (1) remove three screws on cabinet back. (2) push the cabinet backward. 2. To remove door assembly (1) remove a screw which secure the stopper hinge top. (2) remove the door assembly from top plate of cavity. (3) reverse the above steps for reassembly. A...

  • Page 11

    Disassembly and assembly 3. To remove door parts. Kog-37250s kog-39250s (1) remove the gasket door from door weld as. (2) remove the barrier screen inner from door weld as. (3) remove the door frame from door weld as. (4) remove the stopper hinge top from door weld as. (5) remove the spring and the ...

  • Page 12

    Disassembly and assembly 4. Method to reduce the gap between the door seal and the oven front surface. (1) to reduce gap located on part ‘a’. Loosen a screw on stopper hinge top, and then push the door to contact the door seal to oven front surface. Tighten a screw. (2) to reduce gap located on part...

  • Page 13

    Disassembly and assembly 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 two screws which secure the timer assembly. (3) remove the timer assembly. (4) pull out the timer knob from th...

  • Page 14

    Disassembly and assembly 6. To remove high voltage capacitor. (1) remove a 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 remo...

  • Page 15

    Disassembly and assembly 8. To remove wind guide assembly. (1) remove a screw for earthing. (2) remove the noise filter from the wind guide. (3) remove a 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...

  • Page 16

    Disassembly and assembly 10. To remove tray motor. (1) remove the coupler in the cavity. (2) turn the set upside down. (3) cut the tray motor cover part from the base plate. (4) remove the tray motor cover. (5) remove a screw which secure the tray motor. (6) remove the tray motor. (7) reverse the ab...

  • Page 17

    Disassembly and assembly 12. To remove heater parts. Ref.No part co de par t name descr iptio n q ty r emark c 01 7392500008 n u t h e x 6n -2-5 s u s 1 c 02 3515000600 s pa c e r in su lato r *i c3771bd 2 c 03 3513301100 in su lato r he at e r sp p t 0.8 1 c 04 3512803400 h eate r 230v 1000w 1r 679...

  • Page 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 switch...

  • Page 19

    Trouble shooting guide 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. 4. When checking the continuity of the switches, fuse or high voltage transf...

  • Page 20

    Trouble shooting guide d oes the fan m oto r w ork w hen yo u s hut the doo r and turn the tim e r? D oes the ove n lam p light? D oes the turntab le turn? R epla ce or repa ir oven la m p, turntable m otor. If m ic row a ve do not o sc illate, c hec k co ntinuity of filam e nt of m agnetron . N orm...

  • Page 21

    Measurement and test 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 ove...

  • Page 22

    Measurement and test 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. 95mm(3.5 in....

  • Page 23

    Measurement and test 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 unpl...

  • Page 24

    Wiring diagram.

  • Page 25

    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 26

    Exploded view and parts list no. Part code part nam e desc ription supply remark a 00 r efer to . D isassem bly and assem bly d o o r a s r efer to d isassem bly and assem bly o b 00 c o n t r o l-pa n e l a s o c 00 in su lato r h eate r a s o f 01 3510801310 c a bin e t p c m t 0.6g e o k o g -372...

  • Page 27

    F 30 3510311700 b a se s b h g t 0.8 o k o g -37250s 3510311900 k o g -39250s f 31 7112401011 s c r e w ta pp in g t 1 tr s 4x10 m f zn o f 32 3512100900 f o o t p p da s f -130 o f 33 7272400811 ta pt it e s c r ew t t 3 t r s 4x 8 m f zn o f 34 3515201101 s to p pe r h in g e *u s c p-1 t 2.5 o f ...

  • Page 28

    Daewoo electronics co., ltd 686, ahyeon-dong mapo-gu seoul, korea c.P.O. Box 8003 seoul, korea telex : dwelec k28177-8 cable : “daewooelec” e-mail : g7f00e@web.Dwe.Co.Kr fax : 02) 360-8184 tel: 02) 360-8179~8180 printed date : jun. 1999.