Samsung M1974R Service Manual
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Samsung M1974R Service Manual

Samsung M1974R Service Manual

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SERVICE
MICROWAVE OVEN
SRSC
MICROWAVE OVEN
M1974R (WHITE)
Manual
8. PCB Diagrams
CONTENTS

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Summary of Contents for Samsung M1974R

  • Page 1: Table Of Contents

    MICROWAVE OVEN M1974R (WHITE) 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 SRSC...
  • Page 2 (e) A Microwave leakage check to verify compliance with the Federal performance standard should be performed on each oven prior to release to the owner. Samsung Electronics...

  • Page 3: Precaution

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

  • Page 4: Specifications

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

  • Page 5: Specifications

    99 MINUTES POWER SOURCE 230V 50Hz, AC POWER CONSUMPTION MICROWAVE : 1,400W OUTPUT POWER FROM 100 TO 1000W (IEC-705 TEST PROCEDURE) OPERATING FREQUENCY 2,450MHz MAGNETRON OM75PH(31) COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS 517(W) x 297(H) x 399(D) Samsung Electronics...

  • Page 6: Operating Instructions

    Power Level Button Time Setting Selection Deodorijation Button Turn Table On/Off Start Button Cancel Button 3-2 Features & External Views Door Safety Interlock Holes Light Ventilation Holes Control Panel Glass Plate Roller Ring Door Latches Coupler 517mm 379mm Samsung Electronics...

  • Page 7: Disassembly And Reassembly

    There exists HIGH VOLTAGE ELECTRICITY with high current capabilities in the circuits of the HIGH VOLTAGE TRANSFORMER secondary and filament terminals. It is extremely dangerous to work on or near these circuits with the oven energized. DO NOT measure the voltage in the high voltage circuit including filament voltage of magnetron. Samsung Electronics...

  • Page 8: 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 9: Replacement Of Fuse/Drive Motor

    Drive Motor Cover 8. Connect all the leads to the drive motor. 9. Screw the deive motor cover to the base plate with a screw driver. 10. Remount the coupler in the correct position. Samsung Electronics...
  • Page 10 3. Lift up the control circuit board from the Ass'y Connector control box. 4. When reconnecting the FPC connector, make sure that the holes on the connector are properly screw engaged with the hooks on the Plastic Fastener. Samsung Electronics...

  • Page 11: 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 12: High Voltage Capacitor

    ∞ Primary switch 5. Confirm that the gap between the switch ∞ Monitor switch (COM-NC) housing and the switch actuator is no more than ∞ Monitor switch (COM-NO) 0.5mm when door is closed. ∞ Door Sensing S/W Samsung Electronics...
  • Page 13 NOTE 1 : Variations or errors in the test procedure will cause a variance in the temperature rise. Additional power test should be made if temperature rise is marginal. NOTE 2 : Output power in watts is computed by multiplying the temperature rise (step E) by a factor of 91 times the of centigrade temperature. Samsung Electronics...

  • Page 14: Procedure For Measurement Of Microwave Energy Leakage

    ; CENTRAL SERVICE CENTER 5-12-2 At least once a year have the microwave energy survey meter checked for accuracy by its manufacturer. Samsung Electronics...

  • Page 15: Troubleshooting

    H.V.Transformer component test procedure and replace if it is H.V.Capacitor defective. H.V.Diode, H.V.Fuse 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 16 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 17: Exploded Views And Parts List

    7. Exploded Views and Parts List 7-1 Exploded Views Samsung Electronics...

  • Page 18: Main Parts List

    ASSY-HVD V2M6,PI9.0,0.05MT DE91-70061A ASSY-H.V.FUSE THV060T-0800-H,5KV/0.8A,WHT DE61-40066A FOOT PP,BLK,-,-,3RD-W DE31-10154A MOTOR-SYNCHRONOUS M2HJ49ZR02,ST-16,50/60HZ DE80-10001F BASE-PLATE SGCC,T0.8,W345,L565,MW5896W DE94-00154N ASSY CONTROL-BOX M1974R/BWT,WHT,3RD-1.0,FISH2,RUSSIA ASSY DOOR S. N. A 3601-000448 FUSE-FERRULE 250V,10A,SB,CERAMIC,6.35X31.8MM DE27-10020C COIL-CHOKE TC-104,0.9UH*2,-,L31*W20*H32,-,ABS,AC250V/14 DE71-00015A COVER-CEILING T0.3,W114.2,L121.5,-,CE2933 DE63-90035G CUSHION-RUBBER DFA20,T2,W190,L100,BLK : Electrostatically Sensitive Devices Warning : Option Parts S.

  • Page 19: Door Parts List

    0.8,0,36,6,BLUING DE64-00028A DOOR-KEY POM,BLK,CE2974 7-4 Control Parts List Ref. No. Parts No. Description Specification Q'ty Remarks DE67-40145A WINDOW-DISPLAY ACRYL,T2,W40,L77,SMOG,30G DE71-00031Z COVER-PANEL ABS,M1974R/BWT,-,-,WHT,3RD-1.0 FISH2 DE72-00052A CONTROL-PANEL ABS,M1974R/BWT,-,-,-,-,WHT DE66-00008H BUTTON-DEFROST ABS,-,-,WHITE,M1974R/BWT,RUSSIA DE66-20176E BUTTON-SELECT-C ABS(HR0370U),5G,-,WHT,M959 DE66-20175E BUTTON-SELECT-B ABS(HR0370U),5G,-,WHT,M959 DE66-20182J BUTTON-START ABS,-,2G,P/WHT,M1774,3RD FISH2 DE64-10127B...

  • Page 20: Standard Parts List

    2S-4X12,TOOTHED CV/AIR DE60-10082H SCREW-A 2S-4X12,TOOTHED MO/FAN DE60-10082H SCREW-A 2S-4X12,TOOTHED PN/OUT DE60-10082H SCREW-A 2S-4X12,TOOTHED DE60-10098A SCREW-ASSY TAP TITE PH,TC,M4X8,SWRCH18A,ZPC2,GLD,W M/DRV DE60-10069A SCREW-TAP TH TH,M4,L10,FRFZY DOOR-A DE60-10088A SCREW-TAP PH PH,M3,L8,FEFZY,PLAIN DE60-10098A SCREW-ASSY TAP TITE PH,TC,M4X8,SWRCH18A,ZPC2,GLD,W DE60-10012A SCREW-TAP TITE TH,+,3,M4,L10,SWR10,ZPC2,TOOTH B-PLATE Samsung Electronics...
  • Page 21 8. P.C.B Diagrams 8-1 P.C.B Diagrams Samsung Electronics...
  • Page 22 3501-001062 RELAY-POWER 24VDC,523.2mW,16A,1FormA,15mS, RY01 3501-001155 RELAY-MINIATURE 24VDC,200MW,3000MA,1FORMA,10MS,10M RY02,RY04 3601-001126 FUSE-FERRULE 250V,1.6A,FA,CERAMIC,5X20MM FUSE 3708-001315 CONNECTOR-FPC/FC/PIC 12P,2mm,STRAIGHT,SN CN04 DE09-00048A IC-MCU HD404316-E01S,M1774R/M1974R,4BIP,SDIP IC01 DE26-20146A TRANS-L.V SLV-745EN,230V,50HZ,AC17/7V LVT1 P10 DE30-20016A BUZZER CBE2220BA,STICK BUZ1 P11 DE34-20071A SWITCH-ROTARY DC10V,1MA,SH,PA-1005A-003-000 ECD1 P12 DE39-40723A WIRE HARNESS DC35V,C-959G,80mm,12PIN CN05...

  • Page 23: Schematic Diagrams

    9. Schematic Diagrams 9-1 Schematic Diagrams Samsung Electronics...

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