Related Manuals for Kenwood KM3901T
Summary of Contents for Kenwood KM3901T
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Page 1: Table Of Contents
MICROWAVE OVEN KM3901T SERVICE Manual MICROWAVE OVEN CONTENTS 1. Precaution 2. Specifications 3. Operating Instructions 4. Disassembly and Reassembly 5. Alignment and Adjustments 6. Troubleshooting 7. Exploded Views and Parts List 8. PCB Diagrams 9. Schematic Diagrams KENWOOD... -
Page 2: Precaution
1. Precaution Follow these special safety precautions. Although the microwave oven is completely safe during ordinary use, repair work can be extremely hazardous due to possible exposure to microwave radiation, as well as potentially lethal high voltages and currents. 1-1 Safety precautions ( 1. - Page 3 Pretaution 1-2 Special Servicing Precautions (Continued) 17. When checking the continuity of the witches or transformer, always make sure that the power is OFF, and one of the lead wires is disconnected. 18. Components that are critical for safety are indicated in the circuit diagram by shading, 19.
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Page 4: Specifications
2. Specifications 2-1 Table of Specifications TIMER 99 MINUTES 90 SECONDS POWER LEVEL ON TIME OFF TIME POWER SOURCE 230V 50Hz, AC KM3901T POWER CONSUMPTION MICROWAVE : 1,350W 4 sec 26 sec GRILL : 1,000W 160W 7 sec 23 sec... -
Page 5: Operating Instructions
Time Setting and Serving Selection Memory Cook Feature 10min. 1min. 10sec. stop start Stop / Cancel Button Start Button cancel 1min.+ KM3901T 3-2 Features & External Views Door Heater Safety Interlock Holes Ventilation Holes Light plated drink soup meal Control Panel... -
Page 6: Disassembly And Reassembly
4. Disassembly and Reassembly 4-1 Replacement of Magnetron, Motor Assembly and Lamp Remove the magnetron including the shield case, permanent magnet, choke coils and capacitors (all of which are contained in one assembly). Thermo S/W Lamp 1. Disconnect all lead wires from the magnetron Fan Motor and lamp. - Page 7 Disassembly and Reassembly 4-3 Replacement of Door Assembly 4-3-1 Removal of Door Assembly Remove hex bolts securing the upper hinge and Upper Hinge lower hinge. Then remove the door assembly. Screw Lower Hinge Screw 4-3-2 Removal of Door "C" Insert flat screwdriver into the gap between Door "E"...
- Page 8 Disassembly and Reassembly 4-3-5 Reassembly Test After replacement of the defective component parts of the door, reassemble it and follow the instructions below for proper installation and adjustment so as to prevent an excessive microwave leakage. 1. When mounting the door to the oven, be sure to adjust the door parallel to the bottom line of the oven face plate by moving the upper hinge and lower hinge in the direction necessary for proper alignment.
- Page 9 Disassembly and Reassembly 4-7 Replacement of Control Circuit Board 4-7-1 Removal of Ass'y Control Box 1. Be sure to ground any static electric charge in your body and never touch the touch control circuitry. 2. Disconnect the connectors from the control Screw circuit board.
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Page 10: Alignment And Adjustments
5. Alignment and Adjustments PRECAUTION 1. High voltage is present at the high voltage terminals during any cook 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 discharge the high voltage capacitor. -
Page 11: High Voltage Capacitor
Alignment and Adjustments 5-4 High Voltage Capacitor 1. Check continuity of the capacitor with the meter set at the highest resistance scale. 2. Once the capacitor is charged, a normal capacitor shows continuity for a short time, and then indicates 9MΩ. 3. - Page 12 Alignment and Adjustments 5-8 Output Power of Magnetron CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT ALLOW EXPOSURE TO MICROWAVE RADIATION FROM MICROWAVE GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY. The output power of the magnetron can be measured by performing a water temperature rise test. Equipment needed : * Two 1-liter cylindrical borosilicate glass vessel (Outside diameter 190 mm) * One glass thermometer with mercury column...
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Page 13: Procedure For Measurement Of Microwave Energy Leakage
Alignment and Adjustments 5-10 Procedure for Measurement of Microwave Energy Leakage 1) Pour 275±15cc of 20±5ûC(68±9ûF) water in a beaker which is graduated to 600cc, and place the beaker in the center of the oven. 2) Start to operate the oven and measure the leakage by using a microwave energy survey meter. -
Page 14: Troubleshooting
6. Troubleshooting PRECAUTION 1. CHECK GROUNDING BEFORE CHECKING FOR TROUBLE. 2. BE CAREFUL OF THE HIGH VOLTAGE CIRCUIT. 3. DISCHARGE THE HIGH VOLTAGE CAPACITOR. 4. WHEN CHECKING THE CONTINUITY OF THE SWITCHES OR TRANSFORMER, DISCONNECT ONE LEAD WIRE FROM THESE PARTS AND THEN CHECK CONTINUITY WITHOUT THE POWER SOURCE ON. - Page 15 Troubleshooting 6-1 Electrical Maltunction(continved) SYMPTOM CAUSE CORRECTIONS Oven lamp and fan motor turn on 1. Misadjustment or loose wiring Adjust door and latch switches. of primary latch switch 2. Defective primary latch switch Oven can program but timer 1. Open or loose wiring of secondary Adjust door and interlock switches.
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Page 16: Exploded Views And Parts List
7. Exploded Views and Parts List 7-1 Exploded Views... -
Page 17: Main Parts List
DE47-20033A THERMOSTAT;PW-2N,80/70,125V15A/250V7.5A,1 M 25 DE80-10003A BASE-PLATE;SGCC1-Z,T0.8,W340,L550,M745 M 26 DE61-40017A FOOT;PP(A353),BLK,MW5630T M 27 DE74-70071B RACK-WIRE;MSWR3,PI3,PI230,HI80,SNC2 M 28 DE93-30341H ASSY CONTROL-BOX;KM3901T(G645C),COMET M 29 DE92-40165S ASSY DOOR;KM3901T(G645C),WHT,COMET M 30 DE47-20161A THERMOSTAT;PW2N(120/110)187Z23.,250V/7.5A M 31 DE39-30097B WIRE LEAD-G;L100,MBQ45,GRILL M 32 DE39-40543A WIRE HARNESS-A;230V50HZ,G645C M 33 DE67-60002A COUPLER;PPS,5GR,BRN,M97G45... -
Page 18: Door Parts List
Exploded Views and Parts List 7-3 Door Parts List Ref. No. Parts No. Description/Specification Q'ty Remarks DE67-20004Q SCREEN-DOOR;ACRYL,T1.5,-,-,-,KM2900M,KM290 DE02-00125A TAPE-DOUBLE FACE;ACRYL,T0.45,W9,WHT,WF103,#4420 DE64-40007H DOOR-A;ABS-HR0370,-,WHT,-,KM3901T(G64 DE61-80004A HINGE-LOWER;SCP1,T2.3,ZN-COATING,M745 DE61-80005A HINGE-UPPER;SCP1,T2.3,ZN-COATIN,M745 DE92-50126D ASSY DOOR-E;M745,-,BLK,ASSY PURCHASING DE64-40008B DOOR-C;PP,T1.5,BLK,CE745G DE64-40006A DOOR-KEY;POM(TC3005),T2.0,12GR,BLK,CE94 D 10 DE61-70033A SPRING-KEY;ES,HSWR10,PI0.6,D6.0,L22.3,BLU 7-4 Control Parts List Ref. -
Page 19: Standard Parts List
Exploded Views and Parts List 7-6 Standard Parts List Parts No. Description / Specification Q'ty Remarks DE60-10012A SCREW-TAP TITE;TH,+,3,M4,L10,SWR10,ZPC2,TOOTH B/UPP DE60-10012A SCREW-TAP TITE;TH,+,3,M4,L10,SWR10,ZPC2,TOOTH P-C-EA DE60-10059A SCREW-TAP TH;TH,M4,L8,SUS410,CR B/HEAT DE60-10080A SCREW-WASHER;M5,L12,2S DE60-10080A SCREW-WASHER;M5,L12,2S DE60-10082H SCREW-A;2S-4X12,TOOTHED B-PLTE DE60-10082H SCREW-A;2S-4X12,TOOTHED B/UPP DE60-10082H SCREW-A;2S-4X12,TOOTHED BD-LAT DE60-10082H SCREW-A;2S-4X12,TOOTHED... - Page 20 8. P.C.B Diagrams 8-1 P.C.B Diagrams...
- Page 21 P.C.B Diagrams 8-2 P.C.B Parts List Parts No. Description / Specification Q'ty Remarks 3501-001016 RELAY-MINIATURE;24V,12.5mA,5A,1FormA,8mS,4mS RY02,RY03 3501-001062 RELAY-POWER;24VDC,523.2mW,16A,1FormA,15mS RY01 3501-001068 RELAY-POWER;24Vdc,523mW,16A,1FormA,15mS,10 RY04 3708-000528 CONNECTOR-FPC/FC/PIC;13P,2.54mm,STRAIGHT,SN CN04 DE07-10081A V.F.DISPLAY;SVM-4SM03,GRN/RSHORG,4,51,81.7 VFD1 DE09-30532A IC-MCU;HD404316-C33S,DIP,G645C(EURO) IC01 DE26-20141A TRANS-L.V;SLV-945E,230V,50HZ,AC17/2.9V LVT1 DE30-20016A BUZZER;CBE2220BA,STICK BUZ1 DE61-90004A HOLDER-DIGITRON;NYLON#66,1.5,85,36,8GR,BLK DE91-20442A ASSY PCB AUTO-MAIN;230V50HZ,M945(EURO)NEW 0401-001002 DIODE-SWITCHING;1N4148M,100V,200mA,DO-34,TP...
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Page 22: Schematic Diagrams
9. Schematic Diagrams 9-1 Schematic Diagrams ASSY CHOKE P.C.B TIMER CAVITY SWITCH H.V.T H.V.D 230V 230V~ 50Hz H.V.FUSE MONITOR (0.75A) SWITCH H.V.C (0.95uF) MAIN RELAY MONITOR RESISTOR INRUSH RELAY FUSE (250V 1.6A) POWER RELAY NOTE MAGNETRON 1. INPUT : 230V 2.