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Samsung M1712NR Service Manual
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Samsung M1712NR Service Manual

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MICROWAVE OVEN
M1712NR
SERVICE
Manual
MICROWAVE OVEN
CONTENTS

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Summary of Contents for Samsung M1712NR

  • Page 1: Table Of Contents

    MICROWAVE OVEN M1712NR 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. 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 35 MINUTES POWER SOURCE 230V 50Hz, SINGLE PHASE POWER CONSUMPTION MICROWAVE : 1,150W OUTPUT POWER 100W/800W (IEC-705 TEST PROCEDURE) OPERATING FREQUENCY 2,450MHz MAGNETRON OM75S(31)ESS COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS 489(W) x 275(H) x 365(D) OVEN DIMENSIONS 306(W) x 211(H) x 320(D) SHIPPING DIMENSIONS...

  • Page 6: Operating Instructions

    3. Operating Instructions 3-1 Control Panel 3-2 Features & External Views VENTILATION HOLES LIGHT VARIABLE COOKING POWER CONTROL KNOB TIMER KNOB COUPLER TURNTABLE ROLLER RING OPEN DOOR PUSH BUTTON SAFETY DOOR LATCHES DOOR INTERLOCK HOLES 206mm 342mm 365mm 489mm...

  • 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 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 9 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 4-6 Replacement of Control Circuit Board 4-6-1 Removal of Control Box Assembly 1. Disconnect the connectors from the control box assembly. SCREW 2. Remove screws securing the control box assembly. 3. Remove the knobs of the control box A’ssy. CONTROL 4.

  • 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 5-3 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 5-6 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 5-8 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 WARNING FOR HIGH VOLTAGE 4000 VOLTS EXIST AT THE HIGH VOLTAGE AREA. DO NOT OPERATE THE OVEN WITH CABINET PARTS REMOVED. DO NOT REMOVE THE CABINET PARTS IF THE POWER SUPPLY CORD IS PLUGGED IN THE WALL OUTLET. UNPLUG THE POWER CORD BEFORE SERVICING. 6-1 Electrical Malfunction Parts Cause...
  • Page 16 6-1 Electrical Malfunction(continued) part Cause Diagnosis Remedy To increase the oven 1) Too small If a small amount of food is heated for a long time, water into water into a load period of microwave may turn off during operation. the oven.
  • Page 17 6-2 Unsatisfactory Cooking Parts Cause Diagnosis Remedy 1) Open cathode of Check the terminals with a multimeter to see Replace magnetron. magnetron if the heater circuit is open. Check the H. V. Diode for continuity in the reverse and 2) Defective normal directions using megger.

  • Page 18: Exploded Views And Parts List

    7. Exploded Views and Parts List 7-1 Exploded Views MD11 MD05 MD04 MD24 MD02 MM01 MM17 MD06 MD10 MD07 MM03 MM07 MD03 MM55 MM55 MM05 MM26 MD01 MM06 MM10 MM16 MM13 MB05 MM08 MM22 MB03 MM09 MB02 MC01 MM28 MM14 MB01 MB04 MC12...
  • Page 19 7-2 Main Parts List Code No. Description Specification Q’ty Remark MB01 DE96-00115C ASSY BODY LATCH CE2611N,NC2000(BUTTON) MB02 3405-000175 SWITCH-MICRO 250V,15A,200gf,SPST-NO MB03 3405-000178 SWITCH-MICRO 250V,15A,200gf,SPST-NO MB03 3405-000178 SWITCH-MICRO 250V,15A,200gf,SPST-NO MB04 DE66-00088A LEVER-SWITCH NC2000(0.6/0.8/1.2),PP,-,-, MB05 DE72-00138A BODY-LATCH NC2000(0.6/0.8/1.2),PP,-,-,-, MM01 DE70-00184P PANEL-OUTER MW850WA,C/STEEL,T0.5,-,-,-,P MM03 DE39-00041C WIRE HARNESS-A...
  • Page 20 7-3 Control & Door Parts List Code No. Description Specification Q’ty Remark MC01 ASSY CONTROL-BOX 230V49HZ,M1712NR/BWT,PUR S.N.A MC03 DE72-00462C CONTROL-PANEL M1712NR/BWT,ABS,-,-,-,-,PURE MC04 DE61-70076A SPRING-BUTTON -,HSWR,PI0.6,PI0.6,-,-,-,- MC05 DE66-20275A BUTTON-PUSH 3RD-W S1 MW5592W,-,-,-,-,9g MC08 DE45-10074H TIMER TMFK35MTM1,-,21V,-,50Hz,-,-,STL BK MC09 DE64-00349A KNOB N8C77,ABS,-,-,-,-,PURE-WHT,-,-...
  • Page 21 7-4 Standard Parts List Code No. Description Specification Q’ty Remark DE60-10012A SCREW-TAP TITE -,SWR10,M4,L10,TH,+,-,3,ZPC2,- N/P EARTH DE60-10012A SCREW-TAP TITE -,SWR10,M4,L10,TH,+,-,3,ZPC2,- P/C EARTH DE60-10012A SCREW-TAP TITE -,SWR10,M4,L10,TH,+,-,3,ZPC2,- PCB EARTH DE60-10012A SCREW-TAP TITE -,SWR10,M4,L10,TH,+,-,3,ZPC2,- TCO-S/W DE60-10063A SCREW-TAP TH -,-,FEFN,-,TH,M4,-,L12,-,- O/PANEL DE60-10080B SCREW-WASHER -,2S,SWRCH18A,ZP2,PH,PI5,-,L10,-,- DE60-10080B SCREW-WASHER...

  • Page 22: Schematic Diagrams

    8. Schematic Diagrams 8-1 Schematic Diagrams MAGNETRON HIGH VOLTAGE DIODE TO CHASSIS HIGH VOLTAGE CAPACITOR H.V.FUSE SYMBOL COLOR BROWN BLACK BLUE HIGH VOLTAGE TRANSFORMER...