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Samsung MR5491G Service Manual

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  Summary of Contents for Samsung MR5491G

  • Page 1: Table Of Contents

    MICROWAVE OVEN MR5491G / MR5492W SERVICE Manual CONTENTS MICROWAVE OVEN 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: Precaution

    10. Service technicians should remove their 16. Always connect a test instrument's ground lead to the instrument chassis ground before watches while repairing an MWO. connecting the positive lead; always remove the instrument's ground lead last. Samsung Electronics...
  • Page 3: Specifications

    PRECAUTION with the oven energized. DO NOT measure the voltage in the high voltage circuit Servicemen should remove their watches whenever including filament voltage of magnetron. working close to or replacing the magnetron. Samsung Electronics...
  • Page 4: Specifications

    2. Specifications 2-1 Table of Specifications MODEL MR5491G / MR5492W ITEM TIMER 99 MINUTES 99 SECONDS POWER SOURCE 120V/60HZ, AC POWER CONSUMPTION MICROWAVE : 1,400W OUTPUT POWER FROM 100W TO 1000W (10 LEVEL POWER) (IEC-705 TEST PROCEDURE) OPERATING FREQUENCY 2,450MHz...
  • Page 5: Operating Instructions

    Press to pause oven or correct a mistake. Press to start cooking. 3-2 Features & External Views Ventilation Holes Light Door Safety Interlock Holes Control Panel Door Latches Open Door Push Button Guide Roller Glass Plate 216.4 mm 369 mm 517 mm 317.4 mm Samsung Electronics...
  • Page 6: Disassembly And Reassembly

    • PLUG POWER CORD INTO RECEPTACLE, AND SLIDE OVEN INTO CABINET. • SECURE OVEN TO CABINET THROUGH HOLES IN UPPER AND LOWER TRIMS. (Fig. 2) • OVEN FEET MUST SIT ON CABINET FLOOR OR SUPPORT RUNNERS THAT ARE FLUSH WITH BOTTOM EDGE OF CABINET OPENING. (Fig. 2) Samsung Electronics...
  • Page 7: Replacement Of Door Assembly

    ¥ Insertion depth of the thin metal plate should be 0.5mm or less. 4-3-3 Removal of Key Door & Spring Door "E" Remove pin hinge from Door "E" Detach spring from Door "E" and key door. Key Door Spring Samsung Electronics...
  • Page 8: Replacement Of Fuse/Drive Motor

    Switch coupler. 8. Connect all the leads to the drive motor. Drive Motor Cover Base Plate 9. Screw the drive motor cover to the base plate with a screw driver. Samsung Electronics...
  • Page 9 3. When installing new membrane key board, make sure that the surface of escutcheon base is Membrane cleaned sufficiently so that any problems Panel (shorted contacts or uneven surface) can be avoided. Samsung Electronics...
  • Page 10: Alignment And Adjustments

    2. Isolate the magnetron from the circuit by disconnecting its leads. 3. A continuity check across the magnetron filament terminals should indicate one ohm or less. 4. A continuity check between each filament terminal and magnetron case should read open. Cooling Fins Samsung Electronics...
  • Page 11: High Voltage Capacitor

    ¥ Primary switch ¥ Secondary switch 5. Confirm that the gap between the switch ¥ Monitor switch (COM-NC) housing and the switch actuator is no more than ¥ Door Sensing S/W 0.5mm when door is closed. Samsung Electronics...
  • Page 12 5. After heating for 2 minutes, measure the water temperature in each beaker. 6. Microwave heat distribution rate can be calculated as follows: Minimum Beaker Temperature Rise Heat Distribution = X 100(%) Maximum Temperature Rise The result should exceed 65%. Cooking Tray Samsung Electronics...
  • Page 13: Procedure For Measurement Of Microwave Energy Leakage

    ; CENTRAL SERVICE CENTER 5-13-2 At least once a year have the microwave energy survey meter checked for accuracy by its manufacturer. Samsung Electronics...
  • Page 14: Troubleshooting

    H.V.Transformer component test procedure and replace if it is H.V.Capacitor defective. H.V.Diode Magnetron 4. Open or loose wiring of power relay 5. Defective primary latch switch 6. Defective power relay or Ass'y PCB Replace PCB main. Samsung Electronics...
  • Page 15 Use plastic wrap or cover with a lid. Stir once or twice while cooking foods such as soup, cocoa, or milk. Noise from the turntable motor Noise may result from the motor. Replace turntable motor. when it starts to operate. Samsung Electronics...
  • Page 16: Exploded Views And Parts List

    7. Exploded Views and Parts List 7-1 Exploded Views Samsung Electronics...
  • Page 17: Main Parts List

    Exploded Views and Parts List 7-2 Main Parts List Ref. No. Parts No. Description Specification Q'ty Remarks DE70-30001W PANEL-OUTER V/STEEL,T0.5+T0.2,W360,L1128,S MR5491G DE70-30001U PANEL-OUTER SECC,T0.6,W360,L1128,WHT,MR548 MR5492W 3601-000440 FUSE-FERRULE 250V,20A,TL,CERAMIC,6.35x31.8m DE96-00012A ASSY NOISE FILTER SN-3WUB,250V20A,3W 20A DE31-00002A MOTOR-FAN SMF-3RDUA1MW5896W,-,-,120V60HZ,2450RPM DE39-00043A WIRE HARNESS-A...
  • Page 18: Door Parts List

    Exploded Views and Parts List 7-3 Door Parts List Ref. No. Parts No. Description Specification Q'ty Remarks DE64-00037E DOOR-A ABS(HR0370),-,-,-,D/GRY,MW5491G MR5491G DE64-00037D DOOR-A ABS(HR0370),-,-,-,P/WHT,MW5490W MR5492W DE64-40006F DOOR-KEY POM(F20-02),-,-,12G,BLK,MW7897G,NO-TALK MR5491G DE64-40006B DOOR-KEY POM(TC3005),T2,12GR,WHT,MW5574 MR5492W DE61-70032A SPRING-KEY ES,HSWR,PI0.6,D5.4,L25,MW8640T DE67-00011A SCREEN-DOOR(B) PC,T0.5,-,340X188,NTR,JE1044JAC DE94-00073B ASSY DOOR-SUB 3RD-1.0,MW5897G,BLK...
  • Page 19: Standard Parts List

    DE60-10012A SCREW-TAP TITE TH,+,3,M4,L10,SWR10,ZPC2,TOOTH DE92-90522A ASSY-SCREW PACK MR5481G,SCREW-A(6EA) 7-7 Body Latch Parts List Ref. No. Parts No. Description Specification Q'ty Remarks DE64-90154C TRIMMER-UPPER SECC,T1.0,W53.1,BLK,-,L532.2,MR5481G MR5491G DE64-90154D TRIMMER-UPPER SECC,-,-,-,WHT,MR5482W MR5492W DE64-90155C TRIMMER-LOWER SECC,T1.0,W42.3,L532.2,-,BLK MR5491G DE64-90155D TRIMMER-LOWER SECC,T1.0,W42.3,L532.2,-,WHT MR5492W DE70-40311A PLATE-BOTTOM SGCC,T0.6,W253,L264.5,-,MR5481...
  • Page 20 8. P.C.B Diagrams 8-1 P.C.B Diagrams Samsung Electronics...
  • Page 21 4MHz,0.5%,TP,10.0x5.0x7.5mm XTL1 P35 3711-000940 CONNECTOR-HEADER BOX,4P,1R,2.5mm,STRAIGHT,SN CN03 P36 3711-004143 CONNECTOR-HEADER BOX,2P/3P,1R,5mm/2.5mm,STRAIGH CN07 P37 DE13-20009A KA7533,DIP IC02 P38 DE39-60001A WIRE-SO COPPER PI0.6,SN,T,52MM,TAPING_WIRE J01,J02,J04,J05,J10 P38 DE39-60001A WIRE-SO COPPER PI0.6,SN,T,52MM,TAPING_WIRE J11,J12,J13,J14,J15 P38 DE39-60001A WIRE-SO COPPER PI0.6,SN,T,52MM,TAPING_WIRE P39 DE09-00032A IC-MCU HCD6433724-F18,MW5693W(3RD-VFD),8BIT IC01 Samsung Electronics...
  • Page 22: Schematic Diagrams

    BLK BLK BLU RED : BLUE ORG : GRANGE BLK BLU : GREEN : RED SECONDARY PRIMARY INTERLOCK DOOR INTERLOCK SWITCH INTERLOCK SWITCH MONITOR SWITCH SENSING SWITCH MAGNETRON HIGH VOLTAGE DIODE TO CHASSIS HIGH VOLTAGE CAPACITOR HIGH VOLTAGE TRANSFORMER Samsung Electronics...

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Mr5492w