hit counter script
Kenwood KM2901T Service Manual
  1. Manuals
  2. Brands
  3. Kenwood Manuals
  4. Microwave Oven
  5. KM2901T
  6. Service manual
Kenwood KM2901T Service Manual

Kenwood KM2901T Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

SERVICE
MICROWAVE OVEN
KENWOOD
MICROWAVE OVEN
KM2901T
Manual
hot
plated
drink
soup
meal
0.1kg
auto weight
0.1 kg
defrost
power
clock
hr.
min.
10sec.
10min.
1min.
stop
start
cancel
1min.+
KM2901T
8. PCB Diagrams
CONTENTS

Advertisement

Table of Contents
loading

Related Manuals for Kenwood KM2901T

Summary of Contents for Kenwood KM2901T

  • Page 1: Table Of Contents

    MICROWAVE OVEN KM2901T SERVICE Manual MICROWAVE OVEN CONTENTS 1. Precaution 2. Specifications 3. Operating Instructions 4. Disassembly and Reassembly 5. Alignment and Adjustments plated drink soup meal 0.1kg auto weight 0.1 kg defrost power clock 6. Troubleshooting min. 10sec. 10min.

  • 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: Specifications

    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.

  • 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 KM2901T POWER CONSUMPTION MICROWAVE : 1,300W 4 sec 26 sec 160W 7 sec 23 sec OUTPUT POWER FROM 80 TO 800W (10 LEVEL POWER)

  • Page 5: Operating Instructions

    Timer Setting Button min. 10sec. 10min. 1min. stop start Cancel Button Standard Boost Button cancel 1min.+ KM2901T 3-2 Features & External Views Door Light Safety Interlock Holes Ventilation Holes plated drink soup meal 0.1kg auto weight 0.1 kg...

  • 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, Cover Air Thermo S/W permanent magnet, choke coils and capacitors (all of which are contained in one assembly). Lamp 1. Disconnect all lead wires from the magnetron 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. Screws Lower Hinge Screws 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 4-6 Replacement of Control Circuit Board 4-6-1 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.

  • Page 10: Alignment And Adjustments

    3. Before touching any oven components or wiring, always unplug the oven from its power source and discharge the high voltage capacitor. 5-1 High Voltage Transformer 1. Remove connectors from the transformer terminals Filament Terminals and check continuity. 2. Normal resistance readings are as follows: MODEL KM2901T Secondary Approx. 130Ω Filament Approx.0Ω Primary Approx.1.700Ω Secondary...

  • 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...

  • Page 13: Procedure For Measurement Of Microwave Energy Leakage

    Hold the probe stop start cancel 1min.+ KM2901T perpendicular to the cabinet door. Place the 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 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.

  • Page 16: Exploded Views And Parts List

    7. Exploded Views and Parts List 7-1 Exploded Views M 31...

  • Page 17: Main Parts List

    DE31-10154A MOTOR-DRIVE;M2HJ49ZR02,ST-16,21V M 28 DE47-20033A THERMOSTAT;PW-2N,80/70,125V15A/250V7.5A,1 M 29 DE66-90013A LEVER-DOOR;POM(F20-01),NTR,MW5630T M 30 DE71-60011A COVER-MGT;PP,T2.0,WHT,M745 M 31 DE93-30361M ASSY CONTROL-BOX;KM2901T(M745),COMET M 32 DE92-40165R ASSY DOOR;KM2901T(M745),WHT,COMET M 33 DE61-80004A HINGE-LOWER;SCP1,T2.3,ZN-COATING,M745 M 34 DE61-80005A HINGE-UPPER;SCP1,T2.3,ZN-COATIN,M745 : Warning : Option Parts :Electrostatically Sensitive Devices...

  • Page 18: Door Parts List

    Exploded Views and Parts List 7-3 Door Parts List Ref. No. Parts No. Description/Specification Q'ty Remarks DE64-40007G DOOR-A;ABS-HR0370,-,WHT,-,KM2901T(M74 DE64-40006A DOOR-KEY;POM(TC3005),T2.0,12GR,BLK,CE94 DE61-70033A SPRING-KEY;ES,HSWR10,PI0.6,D6.0,L22.3,BLU DE01-00003A FILM-DOOR;PE-FILM,T0.15,W142,L262,M745 DE92-50126D ASSY DOOR-E;M745,-,BLK,ASSY PURCHASING DE64-40008B DOOR-C;PP,T1.5,BLK,CE745G DE67-20004Q SCREEN-DOOR;ACRYL,T1.5,-,-,-,KM2900M,KM290 DE02-00125A TAPE-DOUBLE FACE;ACRYL,T0.45,W9,WHT,WF103,#4420 7-4 Control Parts List Ref. No.
  • Page 19 8. P.C.B Diagrams 8-1 P.C.B Diagrams...
  • Page 20 P.C.B Diagrams 8-2 P.C.B Parts List Parts No. Description / Specification Q'ty Remarks 1003-001033 IC-SOURCE DRIVER;TD62781AP,DIP,18P,300MIL,OCTAL IC02 3501-001014 RELAY-POWER;24V,21.8mA,17A,1FormA,20mS,8mS RY01 3501-001016 RELAY-MINIATURE;24V,12.5mA,5A,1FormA,8mS,4mS RY02,RY03 3708-000523 CONNECTOR-FPC/FC/PIC;8P,2.54mm,STRAIGHT,SN CN04 DE07-20126A LED DISPLAY;LTC-4638G,GRN,12,30,48.2X22.38 LED1 DE09-30487A IC-MCU;KS57C0004-64,DIP,M745(2ND-W,LE IC01 DE26-20146A TRANS-L.V;SLV-745EN,230V,50HZ,AC17/7V LVT1 DE30-20016A BUZZER;CBE2220BA,STICK BUZ1 DE91-20368A ASSY PCB AUTO-MAIN;230V50HZ,M745 0401-001002 DIODE-SWITCHING;1N4148M,100V,200mA,DO-34,TP...

  • Page 21: Schematic Diagrams

    9. Schematic Diagrams 9-1 Schematic Diagrams ASSY NOISE FILTER PRIMARY CAVITY SWITCH H.V.T H.V.D 230V 230V~ 50Hz H.V.FUSE MONITOR SWITCH MAIN H.V.C RELAY VOLTAGE FREG RESISTOR INRUSH RELAY POWER RELAY NOTE MAGNETRON 1. INPUT : 230V DOOR 2. DOOR : OPEN SENSING MAIN INRUSH...

Table of Contents