Samsung M187DNR Service Manual
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Samsung M187DNR Service Manual

Samsung M187DNR Service Manual

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MICROWAVE OVEN
M187DNR (WHITE)
SERVICE
Manual
MICROWAVE OVEN
CONTENTS
3. Operating Instructions
6. Troubleshootingstment
8. PCB Diagrams

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Summary of Contents for Samsung M187DNR

  • Page 1: Table Of Contents

    MICROWAVE OVEN M187DNR (WHITE) SERVICE Manual MICROWAVE OVEN CONTENTS 1. Precaution 2. Specifications 3. Operating Instructions 4. Disassembly and Reassembly 5. Alignment and Adjus 6. Troubleshootingstment 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

    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: Special High Voltage Precautions

    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 POWER SOURCE 230V 50Hz, SINGLE PHASE POWER CONSUMPTION MICROWAVE : 1,250W OUTPUT POWER FROM 100 TO 850W (IEC-705 TEST PROCEDURE) OPERATING FREQUENCY 2,450MHz MAGNETRON OM75P(31)ERH COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS 489(W) x 275(H) x 393(D) OVEN DIMENSIONS 330(W) x 211(H) x 329(D)

  • 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, 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 7: Replacement Of Door Assembly

    4-3 Replacement of Door Assembly 4-3-1 Removal of Door "C" Insert flat screwdriver 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 8: 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 9: Replacement Of Control Circuit Board

    4-6 Replacement of Control Circuit Board 4-6-1 Removal of Control Box 1. Be sure to ground any static electric charge in your body and never touch the control circuit. 2. Disconnect the connectors from the control circuit board. 3. Remove screws securing the control box SCREW assembly.
  • Page 10 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 11 4-3 Replacement of Door Assembly 4-3-1 Removal of Door "C" Insert flat screwdriver 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 12 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 13 4-6 Replacement of Control Circuit Board 4-6-1 Removal of Control Box 1. Be sure to ground any static electric charge in your body and never touch the control circuit. 2. Disconnect the connectors from the control circuit board. 3. Remove screws securing the control box SCREW assembly.

  • Page 14: Alignment And Adjus

    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 15: 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 16: 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 17: 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 18: 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 19 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 primary latch switch 2. Defective primary latch switch Oven can program but timer 1. Open or loose wiring of Adjust door and interlock does not start.

  • Page 20: Exploded Views And Parts List

    7. Exploded Views and Parts List 7-1 Exploded Views MD11 MD04 MD03 MM01 MD02 MM17 MD05 MM55 MD06 MD07 MM05 MM07 MM26 MD10 MD01 MD14 MM06 MM03 MM16 MC07 MC141 MB05 MC23 MM10 MC41 MC142 MB03 MB01 MC06 MM22 MM14 MB02 MM28 MC143...

  • Page 21: Main Parts List

    DE39-00224A ASSY POWER CORD M308,-,KDK-4819D,250V6A, MM08 OM75P(31)ERHT ASSY-MAGNETRON OM75P(31)ERHT MM09 DE71-60457B COVER-AIR 3RD-0.7(BTM),PP,-,-,-,-,-,- MM10 4713-001046 LAMP-INCANDESCENT 240V,104mA,25W,ORG,-,- MM127 DE96-00168B ASSY-STEAM BOWL M187DNR/BWT,SER(RUSSIA), MM14 DE26-00080B TRANS H.V SHV-EURO2,230V,50HZ,2340V/3.5V MM16 DE71-00151A COVER-MGT MW850WA,PP,T2,W54,L129,-,GE-WH MM17 DE47-20008A THERMOSTAT PW2N-52JC,100/60,250V/7.5A,H, MM18 DE74-20102D TRAY-COOKING GLASS,T6,-,890g MM19...

  • Page 22: Control & Door Parts List

    7-3 Control & DOOR Parts List Code No. Description Specification Q’ty Remark MC01 ASSY CONTROL-BOX 230V49HZ,M187DNR/BWT,PU S.N.A MC03 DE64-00500N CONTROL-PANEL(TC) M187DNR/BWT,ABS(HG0760 MC06 DE64-00505A WINDOW-DISPLAY M187DN,SAN(CR5381),-,-,-, MC07 RC-M187DN-04 ASSY PCB PARTS M187DNR,230V50HZ MC10 DE64-00510A KNOB-DIAL M187DN,ABS(HG0760),-,-,-,-,W95 MC141 DE64-00511A BUTTON-SELECT(A) M187DN-S,ABS,SILVER,C-D MC142...

  • Page 23: Standard Parts List

    7-4 Standard Parts List Code No. Description Specification Q’ty Remark DE60-30016A NUT-FLANGE M4,MSWR10,-,-,-,-,-,-,- F/MOTOR DE60-10082H SCREW-A -,-,-,-,2S-4X12,TOOTHED,-,-,-,- C/BOX DE60-10082H SCREW-A -,-,-,-,2S-4X12,TOOTHED,-,-,-,- O/PANEL DE60-10098A SCREW-ASSY TAP TITE -,GLD,SWRCH18A,ZPC2,PH,TC,-,M4X8,WT,- D/MOTOR DE60-10098A SCREW-ASSY TAP TITE -,GLD,SWRCH18A,ZPC2,PH,TC,-,M4X8,WT,- DE60-10088A SCREW-TAP PH -,-,FEFZY,PLAIN,PH,M3,-,L8,-,- DE60-10063A SCREW-TAP TH -,-,FEFN,-,TH,M4,-,L12,-,- O/PANEL DE60-10070A...
  • Page 24 8.P.C.B Diagrams...

  • Page 25: Parts List

    8-1 P.C.B Parts List Code No. Description Specification Q’ty Remark 3501-001062 RELAY-POWER 24VDC,523.2mW,16A,1FormA,15mS, 3501-001155 RELAY-MINIATURE 24VDC,200MW,3000MA,1FORMA,10MS,10MS RY2,RY5 3601-001126 FUSE-CARTRIDGE 250V,1.6A,FAST-ACTING,CERAMIC,5x20mm FUS1 DE07-00037E LED DISPLAY CSE-4246G-05,-,-,40SEG,5DIGIT,45.2*22.3*22,YE DSP1 DE09-00054A IC MICOM TPM87CH47U,OTP-16K,QFP,-,-,-,-,-,-,-,-,-,-,44PIN,- DE26-00034A TRANS-L.V SLV-1933EN,230V,50Hz,7.0V/17V,-,35*11,PIN,- LVT1 DE34-00063A SWITCH-PRESSURE DAIL,28VDC,10mA,24,-,JES1424GS ECD1 DE47-40024A HOLDER-FUSE FH-51H,7.5A,-,-,-,-,- FUS1 DE92-01059A...

  • Page 26: Schematic Diagrams

    9. Schematic Diagrams 9-1 Schematic Diagrams ASSY NOISE FILTER MGT / CAVITY TCO PRIMARY S/W H.V.TRANS 230V POWER CORD MONITOR 230~50Hz H.V.FUSE H.V.C INRUSH RELAY P.T.C POWER RELAY (SECONDARY INTERLOCK) DOOR SENSING SWITCH MONITOR FUSE SYMBOL COLOR GROUND NOTE (250V 1.6A) BROWN 1.

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