Summary of KOR-637V0A
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S/m no. : r637v0a002 service manual microwave oven model: kor-637v0a s/m no. : r637v0a002 apr. 2002 ✔ 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 l...
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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 specifications model kor-637v power supply 120v~60hz, single phase with grounding microwave 1,200w power grill consumption combination combination 10w microwave energy output 800w microwave frequency 2450mhz outside dimensions (w x h x d) 465 x 279 x 360 mm (18.3 x 11.0 x 14.2 in) cavity dimension...
Page 5: External View
4 external view 1. Outer dimension 465 279 360
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5 1 1 safety interlock system 2 2 door screen allows viewing of food. The screen is transparent to light, but prevents microwaves escaping. 3 3 door latch when the door is closed, it will automatically shut off. If the door is opened while the oven operating, the magnetron tube will immediately stop...
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6 1 1 auto cook used to cook using a program or to reheat. 2 2 purification used to purify baby bottle, cup, plate, etc. 3 3 power/defrost used to set power level and to defrost foods by weight or time. 4 4 clock used to set clock. 5 5 display cooking time, power level, indicators and present time a...
Page 8: Installation
7 installation 1. Steady, flat location. This microwave oven should be set on a steady, flat surface. 2. Leave space behind and side. All air vents should be kept a clearance. If all vents are covered during operation, the oven may be overheated and, eventually, cause oven failure. 3. Away from radi...
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. When the oven door is opened, the lig...
Page 10: Disassembly and Assembly
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 safe during normal operation. However, carelessness in servicing the oven can result in an electric shock or possible d...
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10 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...
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11 3. To remove door parts. Ref no. Part code part name description q’ty remark a01 3512205230 frame door abs sg-175 sg-0760d 1 a02 3517005670 barrier screen *o temp glass t3.2 1 a03 3515204100 stopper hinge *t as kor-63150s 1 a04 3511706120 door painting as kor-634r0s 1 a05 3517002800 barrier scree...
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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 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’ loosen two scr...
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13 5. To remove control panel parts. B01 b02 b03 b04 b05 b06 b07 b08 b09 ref no. Part code part name description q’ty remark b01 3513404620 knob volume abs xr-401, h-2938 1 b02 3515501530 window display pmma 1 b03 3516726200 control-panel abs sg-175 sg-0760d 1 b04 3516907480 button function abs sg-1...
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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) remov...
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15 8. To remove wind guide assembly. 1) remove a screw for earthing. 2) remove a screw which secure the wind guide assembly. 3) draw forward the wind guide assembly. 4) pull the fan from the motor shaft. 5) remove two screws which secure the motor shaded pole. 6) remove the motor shaded pole. 7) rev...
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16 10. To remove uv lamp assembly. 1) remove the screw which secure the uv lamp assembly to the top-plate. 2) remove the screw which hold the socket starter *o to the cover lamp. 3) remove the socket starter *o from the cover lamp by pushing up two snap fits. 4) remove the socket starter *i from the...
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17 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: Trouble Shooting Guide
18 (trouble 1) oven does not operate at all ; any inputs can not be accepted. 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....
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19 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 button is tapped. Condition check check contin...
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20 (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 trans- former remedy replace no microwave oscillation check continuity of high voltage fuse no...
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21 (trouble 4) the following visual conditions indicate a probable defective touch control circuit 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 power is on. 2. A distinct cha...
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22 condition check check continuity of primary interlock switch malfunction of primary interlock switch result no continuity cause remedy adjust or replace no purification faulty cantacts of relay(ry3) or open relay coil replace check continuity of secondary interlock and d.O.M switch check d.C. Vol...
Page 24: Measurement and Test
23 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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24 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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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 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 printed circuit board no check point remark 1 ic 1 pin 2, 21, 30, 34 -5...
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28 measure point.
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29.
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3. When there is no microwave oscillation 1) when pressing start button, oven lamp does not turn on. Fan motor do 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 turns...
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31 2. Pcb circuit diagram.
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32 no. Name symbol specification part code q'ty 1 buzzer bz1 bm-20k 3515600100 1 2 c array ca1 5p(4) 102m 50v cn4xb-102m 1 3 c electro ec1 16v rss 100uf cexf1c101v 1 4 c electro ec2 25v rss 1000uf cexf1e102v 1 5 connector wafer cn1 yw396-02av 3519150520 1 6 connector wafer cn3 yw396-05av 3519150510 ...
Page 34: Exploded View and Parts List
33 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.
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34 no part code part name description q'ty a00 3511714460 door as kor-637v 1 b00 3516726240 control panel as kor-637v0a 1 f01 3510805300 cabinet as kor-61150s 1 f02 7112401011 screw tapping t1 trs 4*10 mfzn 3 f03 3516109590 cavity as kor-637v0s 1 f04 7122401211 screw tapping t2s trs 4*12 mfzn 1 f05 ...
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35 no part code part name description q'ty f36 3513702610 lever lock pom 1 f37 3518571000 switch push mp101c 1 f39 3513811710 lock pom black 1 f38 3513601500 lamp bl 120v 25w t25 c5a h187 1 f40 3512715120 harness main kor-637v0a 1 f41 fuse f42 7121400611 screw tapping t2s pan 4x6 mfzn 1 f43 39668202...
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S/m no. : r637v0a002 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: apr, 2002.