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Whirlpool AKM2800 Service Manual

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MICROWAVE OVEN

HOME
APPLIANCES
AKM2800
SERVICE
Manual
MICROWAVE OVEN
CONTENTS
8. PCB Diagrams

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Summary of Contents for Whirlpool AKM2800

  • Page 1: Table Of Contents

    MICROWAVE OVEN HOME APPLIANCES AKM2800 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...
  • Page 2 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 (c) Before turning on microwave power operated with the door open. for any service test or inspection within (b) Make the following safety checks on the microwave generating all ovens to be serviced before activating...

  • Page 3: 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 4 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 5: Specifications

    2. Specifications 2-1 Table of Specifications TIMER 99 MINUTES 99SECONDS POWER SOURCE 110V 60Hz, AC POWER CONSUMPTION MICROWAVE : 1,450W OUTPUT POWER 1000W ( 10 LEVEL POWER ) OPERATING FREQUENCY 2,450MHz MAGNETRON OM75P(31)ESS COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS(mm) 517(W) x 300(H) x 380(D) NET WEIGHT 15.3 kg...

  • Page 6: Operating Instructions

    3. Operating Instructions 3-1 Control Panel 3-2 Features & External Views Light Safety Interlock Holes Ventilation Holes Door Control Panel Door Latches Open Door Push Guide Roller Glass Tray 216mm 369mm 517mm 380mm...

  • Page 7: 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). 1. Disconnect all lead wires from the magnetron and lamp. 2.

  • Page 8: Replacement Of Door Assembly

    4-3 Replacement of Door Assembly 4-3-1 Removal of Door "C" Insert flat screw driver into the gap between Door Door "A" "A" and Door "C" to remove Door "C". Be careful when handling Door "C" because it is fragile. Then remove the door assembly. Door "C"...

  • Page 9: Replacement Of Fuse

    4-3-4 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 10: Replacement Of Control Circuit Board

    4-6 Replacement of Control Circuit Board 4-6-1 Removal of Control Box Assembly 1. Be sure to ground any static electric charge in your body and never touch the control circuit. Screw 2. Disconnect the connectors from the control circuit board. 3.

  • Page 11: 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 12: High Voltage Capacitor

    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 9M . 3. A shorted capacitor will show continuous continuity. 4.

  • Page 13: Output Power Of Magnetron

    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 14: Procedure For Measurement Of Microwave Energy Leakage

    5-10 Procedure for Measurement of Microwave Energy Leakage 1) Pour 275±15cc of 20±5° C(68±9° F) 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 15: 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 16 6-1 Electrical Malfunction(continued) SYMPTOM CAUSE CORRECTIONS Oven lamp and fan motor turn on 1. Misadjustment or loose wiring Adjust door and latch switches. of secondary latch switch 2. Defective Secondary latch switch Oven can program but timer 1. Open or loose wiring of Adjust door and interlock does not start.

  • Page 17: Exploded Views And Parts List

    7. Exploded Views and Parts List 7-1 Exploded Views MD05 MD11 MD04 MM01 MD03 MD02 MD06 MM07 MM55 MM05 MM17 MM06 MD07 MM03 MD10 MD01 MM10 MM13 MB01 MM16 MB03 MM08 MM22 MB05 MM09 MB02 MM14 MM28 MB04 MM88 MC01 MB08 MM29 MM30...

  • Page 18: Main Parts List

    7-2 Main Parts List Code No. Description Specification Q’ty Remark MB01 DE96-00115A ASSY BODY LATCH MW850WA,NC2000(BUTTON) MB02 3405-000178 SWITCH-MICRO 250V,15A,200gf,SPST-NO PRI S/W MB03 3405-001033 SWITCH-MICRO 125/250VAC,16A,200GF,SPST-NC MONITOR MB04 DE66-00088A LEVER-SWITCH NC2000(0.6/0.8/1.2),PP,-,NTR,BUTTON-TYPE SEMA MB05 DE72-00138A BODY-LATCH NC2000(0.6/0.8/1.2),PP,-,-,-,-,WHT,- MB08 3405-001042 SWITCH-MICRO DC 24V,0.3A,150gf,- DOOR S/W MM01 DE70-00011V...
  • Page 19 7-3 Control and Door Parts List Code No. Description Specification Q’ty Remark MC01 ASSY CONTROL-BOX S.N.A MC02 DE34-00045Z SWITCH MEMBRANE AKM2800,CHINESE,WHT,PET,-,120V60HZ MC03 DE72-70202A CONTROL-PANEL ABS,WHT,140G,285 MC04 DE61-70076A SPRING-BUTTON HSWR,PI0.6,-,-,-,-,- MC05 DE66-20275A BUTTON-PUSH ABS(HR0370U),-,9G,P/WHT(W9501),3RD-W S1,-,- MC06 DE67-40179A WINDOW-DISPLAY SAN,T2.0,-,-,SMOG,-,3RD-W S1,- MC07...

  • Page 20: Standard Parts List

    7-4 Standard Parts List Code No. Description Specification Q’ty Remark DE60-10059A SCREW-TAP TH -,-,SUS410,CR,TH,M4,-,L8,-,- C/CEILING DE60-10063A SCREW-TAP TH -,-,FEFN,-,TH,M4,-,L12,-,- DE60-10080B SCREW-WASHER -,2S,SWRCH18A,ZP2,PH,PI5,-,L10,-,- DE60-10080B SCREW-WASHER -,2S,SWRCH18A,ZP2,PH,PI5,-,L10,-,- 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,-,-,-,- CN-BOX DE60-10082H SCREW-A -,-,-,-,2S-4X12,TOOTHED,-,-,-,- CV/AIR DE60-10082H...
  • Page 21 8. P.C.B Diagrams 8-1 P.C.B Diagrams...
  • Page 22 8-2 P.C.B Parts List Code No. Description Specification Q’ty Remark 3501-001155 RELAY-MINIATURE 24VDC,200MW,3000MA,1FORMA,10MS,10MS RY01 3501-001188 RELAY-POWER 24V DC,0.53W,-,1FormA,9.3ms,10mS RY02 3708-001510 CONNECTOR-FPC/FC/PIC 14P,1.25mm,STRAIGHT,SN CN04 DE07-00021K LED DISPLAY CSQ-4246G-10,NC2000-CMO,40SEG,- LED1 DE09-00201A IC MICOM TMP87CH47U,SM-200102-BN,CONVECTION,- IC01 DE26-00037A TRANS-L.V SLV-4290U,120V,60Hz,AC17V/7V,-,35*10,PIN,- LVT1 DE30-20016A BUZZER CBE2220BA,STICK,-,-,-,-,-,-,- BUZ1 DE92-00695A ASSY PCB AUTO...

  • Page 23: Schematic Diagrams

    9. Schematic Diagrams 9-1 Schematic Diagrams MAGNETRON BLK BLU HIGH VOLTAGE DIODE TO CHASSIS SECONDARY SWITCH HIGH VOLTAGE CAPACITOR BLK BLK DOOR SENSING SWITCH MONITOR SWITCH BOTTOM CENTER SYMBOL COLOR ORANGE HIGH VOLTAGE WHITE TRANSFORMER BLACK BLUE RED WHT POWER RELAY...
  • Page 24 January 2003 Printed in Korea...

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