DAEWOO ELECTRONICS KOR-637V0A Service Manual

Text of DAEWOO ELECTRONICS KOR-637V0A User Guide:

• DAEWOO ELECTRONICS KOR-637V0A, 30 3. When there is no microwave oscillation 1) When touching START pad, 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 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. refer to Circuit Diagram (Point 2) - Check method 4. When the door is opened durin

• DAEWOO ELECTRONICS KOR-637V0A, 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 two screws 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 screws on stopper hinge under, and then push the door to contact the door seal to oven front surface. Tighten a screw. A small gap may be acceptable if the microwave leakage does not exceed 4mW/cm NOTE 2 DISASSEMBLY AND ASSEMBLY

• DAEWOO ELECTRONICS KOR-637V0A, 13 5. To remove control panel parts. DISASSEMBLY AND ASSEMBLY NO PART CODE PART NAME DESCRIPTION Q'TY B01 3513404620 KNOB VOLUME ABS XR-401, H-2938 1 B02 3511604540 DECORATOR C-PANEL STS304 T0.5 H/L 1 B03 3516003980 SPECIAL DOUBLE TAPE SI-161 T0.15 1 B04 3515501530 WINDOW DISPLAT PMMA 1 B05 3516726200 CONTROL-PANEL ABS SG-175 SG-0760D 1 B06 3516907480 BUTTON FUNCTION ABS SG-175 SG-0760D 1 B07 3514321440 PCB SUB AS KOR-637V 1 B08 3514323330 PCB MAIN AS KOR-637V0A 1 B09 7122401211 SCREW TAPPING T2S TRS 4x12 MFZN 3 B10 7621301011 SCREW TAPPING T2 PAN 3x10 PW MFZN 5 B11 3516908520 BUTTON FUNCTION-C ABS SG-175 SG-07

• DAEWOO ELECTRONICS KOR-637V0A, 27 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 Terminal Voltage LOAD NO LOAD 4 - 7 AC 12.6 AC 14.7V NO CHECK POINT REMARK 1 IC 1 PIN 2, 21, 30, 34 -5VDC 2 IC 1 PIN 35 3 IC 1 PIN 31 OR 32 NO MEASURE POINT WAVE FORM REMEDY REMARK 1 MP1 DC - 5V 0.25V Replace VL1, EC1 NO LOAD 2 MP2 DC - 12V 2.0V Re

• DAEWOO ELECTRONICS KOR-637V0A, 6 3. Control panel 1. Auto cook - Used to cook using a program or to reheat. 2. UV Purification - Used to purify baby bottle, cup, plate, etc. 3. Power/Def - Used to set power level and to defrost foods by weight or time. 4. Clock - Used to set clock. 5. Display - Cooking time, power level, indicators and present time are displayed. 6. Stop/Clear - Used to stop the oven operation or to erase all entries. 7. Strat/Easy cook - Used to start the oven operation and also increase the reheat time by 30 seconds. 8. Dial Knob - Used to set the time and weight. EXTERNAL VIEW

• DAEWOO ELECTRONICS KOR-637V0A, 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) Reverse the above steps for reasembly. 9. To remove H.V. transformert. 1) Remove four screws holding the H.V.transformer. 2) Remove the H.V.transformer. 3) Reverse the ab

• 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 switch When the door is closed, the hook locks the oven door. If the door is not closed p

• DAEWOO ELECTRONICS KOR-637V0A, 3 SPECIFICATIONS * SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. MODEL KOR-637V POWER SUPPLY 120V ~ 60Hz, SINGLE PHASE WITH EARTHING POWER CONSUMPTION MICROWAVE 1200W GRILL COMBINATION 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 DIMENSIONS (W X H X D) 290 x 220 x 306 mm (11.4 x 8.7 x 12.0 in) NET WEIGHT APPROX. 12.3Kg(27.2 lbs.) TIMER 59min. 00 sec. FUNCTION SELECTIONS MICROWAVE POWER SELECTIONS 5 LEVELS CAVITY VOLUME 0.7 Cu.Ft. UV L

• 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 a screw which secure the magnetron. 2) Re

• 35 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 3966820200 MOTOR SYNCRO 120V 2W GM-16-12F17 1 F44 3518905300 THERMOSTAT OFF:75 ON:65 H #187 NR 1 F45 3513003400 HOLDER THERMOSTA

• DAEWOO ELECTRONICS KOR-637V0A, 18 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 transformer, disconnect one lead wire from these parts and check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter. (TROUBLE 1) Door shut, timer set, but no cooking takes place. Continuity No Continuity Continuity 0 Or Approx. 150~310 (norma

• 20 (TROUBLE 3) No microwave oscillation even though fan motor rotates. TROUBLE SHOOTING GUIDE CONDITION CHECK RESULT Continuity Continuity in backward direction 0 Ω No Continuity No Continuity 0 V Approx 15 VDC CAUSE Defective high voltage transformer Defective high voltage rectifier Defective magnetron Defective magnetron Defective high voltage transfor

• DAEWOO ELECTRONICS KOR-637V0A, 34 EXPLODED VIEW AND PARTS LIST 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 3515900100 SOCKET LAMP PBT 2 F06 3519300300 TERMINAL LAMP BRASS 4 F07 3513603000 LAMP GERMICIDAL G4T5/4W SANKYO 1 F08 3511409000 COVER LAMP STS430 T0.4 1 F09 3515900400 SOCKET STARTER *O PBT 1 F10 7112401011 SCREW TAPPING T1 TRS 4*10 MFZN 1 F11 3515900300 SOCKET STARTER *I PBT 1 F12 3519300400 TERMINAL STARTER

• DAEWOO ELECTRONICS KOR-637V0A, 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 oven supplied at rated voltage and operated at its maximum microwave power setting with a load of 10005cc of potable water. 2. The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 190mm. 3. The oven and the empty vessel

• DAEWOO ELECTRONICS KOR-637V0A, 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 danger from a short circuit. You are asked to observe the following precautions carefully. 1. Always remove the power plug from the outlet before servicing. 2. Use an insulated scredriver and ware rubber gloves when servicing the high voltage side. 3. Discahrge the high voltage capacitor before touching any oven components or wiring. (1) Check the earthed. Do not operate on a tw

• DAEWOO ELECTRONICS KOR-637V0A, 19 TROUBLE SHOOTING GUIDE CONDITION CHECK RESULT CAUSE REMEDY Outlet has proper voltage Fuse does not blow. Check continuity of magnetron No Continuity Defective magnetron Replace No Continuity Normal Defective touch control circuit Open power supply cord Replace Check continuity of power supply cord Adjust Check continuity of noise filter board No Continuity Defective line filter board Replace All these switches must be replaced at the same time, please refer to “Interlock Mechanism And Adjustment”. NOTE CONDITION CHECK RESULT CAUSE REMEDY Turn table motor and oven lam

• DAEWOO ELECTRONICS KOR-637V0A, 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 socket starter *O. 5) Remove the terminal starters from the socket starter *I. 6) Remove the starter glow from the socket starter *I. 7) Remove the lamp germicidal from the cover lamp. DISASSEMBLY AND ASSEMBLY 8) Remov

• DAEWOO ELECTRONICS KOR-637V0A, 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 trained service personnel should make repairs.) (1) A broken door hinge. (2) A broken door viewing screen. (3) A broken front panel, oven cavity. (4) A loosened door lock. (5)A broken door lock. The door gasket pl

• DAEWOO ELECTRONICS KOR-637V0A, 5 EXTERNAL VIEW 2. FEATURE DIAGRAM 1. Safety interlock system 2. Door screen - Allows viewing of food. The screen is transparent to light, but prevents microwaves escaping. 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 operating. 4. Oven cavity 5. Door seal - Door seal surfaces prevent microwave escaping from the oven cavity. 7. Glass cooking tray - Made of special heat resista

• DAEWOO ELECTRONICS KOR-637V0A, 21 (TROUBLE 4) The following visual conditions indicate a profective 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 power is on. 2. A distinct change in the display is not on when it should be. 3. One or more digits in the display are not on when they should be. 4. Display indicates a number different from one touched. 5. Specific numbers (for example 2 or 3) will not display when the panel is touched. 6. Display does not count down or up wit

• DAEWOO ELECTRONICS KOR-637V0A, 1 TABLE OF CONTENTS SAFETY AND PRECAUTIONS ........................................................................................................ 2 1. FOR SAFE OPERATION ............................................................................................................. 2 2. FOR SAFE SERVICE PROCEDURES ........................................................................................ 2 SPECIFICATIONS ............................................................................................................................ 3 EXTERNAL VIEW ............................................................................................................................ 4 1. O

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