Related Manuals for Kenwood KM2900M
Summary of Contents for Kenwood KM2900M
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Page 1: Table Of Contents
MICROWAVE OVEN KM2900M SERVICE Manual MICROWAVE OVEN CONTENTS 1. Precaution 2. Specifications 3. Operating Instructions 4. Disassembly and Reassembly 5. Alignment and Adjustments power timer 6. Troubleshooting KM2900M 7. Exploded Views and Parts List 8. Wiring Diagram 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 KM2900M POWER SOURCE 230V 50Hz POWER CONSUMPTION 1300W OUTPUT POWER 120W/800W OPERATING FREQUENCY 2450MHz TIMER 60 MINUTES COOLING METHOD AIR COOLING MAGNETRON OM75SH(31)ESST OUTSIDE DIMENSIONS 489(W) x 356(D) x 275(H)mm OVEN CAVITY DIMENSIONS 306(W) x 322(D) x201(H)mm SHIPPING WEIGHT APPROX. -
Page 5: Operating Instructions
3. Operating Instructions 3-1 Control Panel power timer KM2900M... -
Page 6: Checking That Your Oven Is Operating Correctly
Operating Instruction 3-2 Features & External Views Door Safety Interlock Holes Light Ventilation Holes power Control Panel timer Door Latches KM2900M Open Door Push Button Glass Tray Guide Roller power timer 200mm 357mm 489mm 356mm 3-3 Checking That Your Oven is Operating Correctly NOTE: The oven must be plugged into an appropriate wall socket. -
Page 7: Variable Power Cooking Chart
Operating Instruction 3-4 Variable Power Cooking Chart Operation: OUTPUT POWER LEVEL Set the COOKING POWER CONTROL KM2900M knob to the appropriate power level by turning it. HIGH 100% 800W MEDIUM HIGH 560W MEDIUM 400W 240W DEFROST 160W WARM 120W 3-5 Adjusting the Cooking Time During Cooking... -
Page 8: Disassembly And Reassembly
4. Disassembly & Reassembly 4-1 Replacement of Magnetron, Motor Assembly and Lamp Remove the magnetron including the shield case, Thermo S/W permanent magnet, choke coils and capacitors (all Lamp of which are contained in one assembly). Fan Motor 1. Disconnect all lead wires from the magnetron and lamp. -
Page 9: Replacement Of Door Assembly
Disassembly & Reassembly 4-3 Replacement of Door Assembly 4-3-1 Removal of Door Assembly Remove hex bolts securing the upper hinge and lower hinge. Then remove the door assembly. Upper Hinge Screws Lower Hinge Screw 4-3-2 Removal of Door "C" Insert flat screwdriver into the gap between Door "E"... -
Page 10: Replacement Of Fuse
Disassembly &ReaAssembly 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 11: Alignment And Adjustments
5. Alignment and Adjustments PRECAUTION 1. High voltage is present at the high voltage terminal of the high voltage transformer 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 12: High Voltage Capacitor
Alignment and Adjustments 5-3 High Voltage Capacitor 1. Check continuity of the capacitor with meter set at the highest ohm scale. 2. Once the capacitor is charged, a normal capacitor shows continuity for a short time, and then indicates 10MΩ. 3. -
Page 13: Output Power Of Magnetron
Alignment and Adjustments 5-6 Output Power of Magnetron CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT ALLOW EXPOSWRE 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 of 190mm) * One glass the rmometer with mercury column... -
Page 14: Procedure For Measurement Of Microwave Energy Leakage
4) When measuring the leakage, always use the 2 inch spacer cone with the probe. Hold the probe perpendicular to the cabinet door. Place the KM2900M spacer cone of the probe on the door and/or cabinet door seam and move along the seam, the door viewing window and the exhaust openings moving the probe in a clockwise direction at a rate of 1 inch/sec. -
Page 15: Troubleshooting
6. Troubleshooting WARNING FOR HIGH VOLTAGE 4000 VOLTS EXIST AT THE HIGH VOLTAGE AREA. DO NOT OPERATE THE OVEN WITH CABINET PARTS REMOVED. DO NOT REMOVE THE CABINET PARTS IF THE POWER SUPPLY CORD IS PLUGGED IN THE WALL OUTLET. UNPLUG THE POWER CORD BEFORE SERVICING. - Page 16 Troubleshooting 6-1 Electrical Malfunction (Continved) Parts Cause Diagnosis Remedy 1) Too small If a small amount of food is heated for a long time, To increase the oven a load period of microwave may turn off during operation. load, add a glass of Microwave water into the oven.
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Page 17: Unsatisfactory Cooking
Troubleshooting 6-2 Unsatisfactory Cooking Parts Cause Diagnosis Remedy 1) Open cathode Check the terminals with a multimeter to see Replace magnetron. of magnetron if the heater circuit is open. 2) Defective Check the H. V. Diode for continuity in the reverse and Replace H. -
Page 18: Exploded Views And Parts List
7. Exploded Views and Parts List 7-1 Main Exploded View... -
Page 19: Main Parts List
DE47-20033A THERMOSTAT;PW-2N,80/70,125V15A/250V7.5A,1 M 24 DE71-60011A COVER-MGT;PP,T2.0,WHT,M745 M 25 DE61-80004A HINGE-LOWER;SCP1,T2.3,ZN-COATING,M745 M 26 DE61-80005A HINGE-UPPER;SCP1,T2.3,ZN-COATIN,M745 M 27 DE92-40165Q ASSY DOOR;KM2900M(M735),WHT,COMET M 28 DE93-30360P ASSY CONTROL-BOX;KM2900M(M735),COMET M 29 DE74-20102B TRAY-COOKING;GLASS,T5.0,PI288,780G,M745 M 30 DE92-90436A ASSY-GUIDE ROLLER;D16.5,MW4370W M 31 DE67-60002A COUPLER;PPS,5GR,BRN,M97G45 : Electrostatically Sensitive Devices... - Page 20 Remarks DE66-20006A BUTTON-PUSH;RESIN-ABS(HR-0370U),P/WHT,M945 DE61-70076A SPRING-BUTTON;HSWR,PI0.6 DE64-10123E KNOB;ABS-HR0370,-,WHT,-,KM2900M(M73 DE72-70006P CONTROL-PANEL;ABS-HR0370,WHT,-,-,KM2900M(M73 DE45-10074A TIMER-ASSY;TMFK60MTA1,220/240V-50HZ,CMO-T 3501-000309 RELAY-POWER;240V,3750VA,15A,-,6mS,20mS DE93-30532C ASSY CONTROL-PANEL;KM2900M(M735),COMET 7-5 Assembly Body Latch Parts List Ref. No Parts No. Description / Specification Q'ty Remarks DE66-40001A LATCH-BODY;POM(F20-02) 40GR NTR 3405-000178 SWITCH-MICRO;250V,15A,200gf,SPST-NO 3405-000175 SWITCH-MICRO;250V,15A,200gf,SPST-NO DE66-90001A...
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Page 21: Standard Parts List
Exploded Views and Parts List 7-6 Standard Parts List Parts No. Description / Specification Q'ty Remarks DE60-10012A SCREW-TAP TITETH,+,3,M4,L10,SWR10,ZPC2,TOOTH N-F-EA DE60-10012A SCREW-TAP TITETH,+,3,M4,L10,SWR10,ZPC2,TOOTH P-C-EA DE60-10080A SCREW-WASHER;M5,L12,2S DE60-10080A SCREW-WASHER;M5,L12,2S TNS-HV DE60-10082H SCREW-A;2S-4X12,TOOTHED B-PLTE DE60-10082H SCREW-A;2S-4X12,TOOTHED BD-LAT DE60-10082H SCREW-A;2S-4X12,TOOTHED CON-BX DE60-10082H SCREW-A;2S-4X12,TOOTHED CV/AIR DE60-10082H SCREW-A;2S-4X12,TOOTHED... -
Page 22: Wiring Diagram
8. Wiring Diagram Wiring Diagram T.C.O PRIMARY V.P.C NOISE (MGT) FILTER H.V.D VOLTAGE FREG CAPACITOR 230V FUSE 0.95uF (0.75A) AC 230V H.V.C 50HZ H.V.T RESISTOR T.C.O TIMER SECONDARY INRUSH MAGNETRON (CAVITY) NOTE DOOR IS OPENDS ORG,ORG BROWN BLUE BLU,ORG BRN,BLU ORANGE WHITE PRIMARY...