Summary of KOG-86AR7S
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Service manual microwave oven model: kog-86ar7s daewoo electronics corp. S/m no. : g86ar7s001 http : //svc.Dwe.Co.Kr aug. 2004 ✔ 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...
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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 the door open. (b) make the following safety checks on all ovens to be serviced before activating the magnetron or other micro- w...
Page 3: Safety and Precautions
2 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 trai...
Page 4: Specifications
3 model kog-86ar7s power supply 230v~50hz, single phase with grounding power microwave 1350w consumption grill 1050w combination 2350w microwave energy output 900w microwave frequency 2450mhz outside dimensions (w x h x d) 495 x 294 x 394 mm (19.5 x 11.6 x 15.5 in) cavity dimensions (w x h x d) 320 ...
Page 5: External View
4 external view 1. Outer dimension.
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5 1 1 door seal - door seal maintains the microwave within the oven cavity and prevents microwave leakage. 2 2 door hook - when the door is closed, it will automatically lock shut. If door is opened while oven is operating, magnetron tube will immediately stop operating. 3 3 door screen - allows vie...
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6 7 3 4 1 2 5 6 8 1 1 display - cooking time, power level, indicators and present time are displayed. 2 2 auto cook - used to cook using a program or to reheat. 3 3 mw - used to set power level. 4 4 defrost - used to defrost foods by weight or time. 4 4 grill - used to grill. 4 4 combi - used to coo...
Page 8: Installation
7 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 9: Operations and Functions
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. The oven door can be opened at any ti...
Page 10: Disassembly and Assembly
9 disassembly and assembly cautions to be observed when troubleshooting. 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 ...
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10 1. To remove cabinet 1) remove three screws on cabinet back. 2) pull 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 for reassembly. Note : after replacing the door as...
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11 ref no. Part code part name description q'ty remark a01 3512209730 frame door hips sg-970 hg-1760h 1 a02 3517005780 barrier-screen *o pet to.125 1 a03 3515204100 stopper hinge *t as kor-63150s 1 a04 3511711800 door painting as kor-866t0s 1 a05 3517006000 barrier-screen *i polyester t0.1 1 a06 351...
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12 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 ‘b’ • loosen two s...
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13 ref no. Part code part name description q'ty remark b01 3513408010 knob volume abs sg-175 sg-0760d coating 1 b02 3515502300 window display san cr-5381 smog 1 b03 3516729740 control-panel hips sg-970 hg-1760h 1 b04 3516911820 button functi0n-b abs sg-175 sg-0760d 1 b05 3516911730 button function-a...
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14 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 remove magnetron. 1) remove ...
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15 8. 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...
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16 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 above steps for reassembly exce...
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16 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: Troubleshooting Guide
17 (trouble 1) oven does not operate at all ; any inputs can not be accepted. Troubleshooting guide condition check result cause remedy fuse blows check continuity of inter- lock monitor switch with door closed (com nc) check continuity of pri- mary interlock switch con- tact with door partially ope...
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18 condition check result cause remedy replace outlet has proper voltage. Fuse does not blow. Check continuity of magnetron no continuity defective magnetron replace defective line filter board replace check continuity of noise filter board replace defective touch con- trol circuit check continuity ...
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19 (trouble 3) no microwave oscillation even though fan motor rotates. Condition no microwave oscillation check result cause remedy replace check continuity of high voltage capacitor terminals with wires removed continuity defective high voltage transformer replace check continuity of high voltage d...
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20 malfunction of the p.C.B sub-assembly replace the p.C.B sub-assembly (trouble 4) the following visual conditions indicate a probable defective touch control circuit assembly. 1. Incomplete segments (1) segments missing (2) partial segments missing (3) digit flickering other than normal display sl...
Page 23: Measurement and Test
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 ...
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22 2. Microwave radiation test procedures 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 600cc glass beaker with an inside diameter of approx. 95mm(3.5in.). 3. Place it at the center...
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23 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 from i...
Page 26: Wiring Diagram
Wiring diagram 25.
Page 27: Printed Circuit Board
25 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 printed circuit board no check point remark 1 ic 1 pin 40, 18 5 vdc 2 ic 1 pin ...
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Mp1 mp2 measure point gnd 27.
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28 3. When there is no microwave oscillation 1) when pressing start button, 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 pressing start button, oven lamp tu...
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2. Pcb circuit diagram 29.
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No name symbol part code specification q'ty remark 1 buzzer bz1 3515600100 bm-20k (bujeon) 1 2 c array ca1 cn4xb-102m 5p(4) 102 m 50v 1 3 c cera c1~3,5~8 cczf1h104z 50v hikf 0.1uf z 7 4 c electro ec1 cexf1c101v 16v rss 100uf 1 5 c electro ec2 cexf1e102v 25v rss 1000uf 1 6 conn wafer cn1 3519150520 y...
Page 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 exploded view and parts list 31.
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No part code part name description q'ty a00 3511715420 door as kor-86ar7s 1 b00 pkcpswa620 control-panel as kog-86ar7s 1 f01 3510805400 cabinet as kor-81150s 1 f02 7112401011 screw tapping t1 trs 4*10 mfzn 3 f03 7s627w50x1 net hex nut flange m5x0.8p mfzn 1 f04 3516109910 cavity as kog-39150s 1 f05 7...
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S/m no. : g86ar7s001 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: aug. 2004.