Samsung M1914R Service Manual Download Page 10 | Manualshive

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4-6 Replacement of Control Circuit Board

4-6-1 Removal of Ass'y Control Box

4-4

Samsung Electronics

1. Disconnect the connectors from the control box

assembly.

2. Remove screws securing the control box

assembly.

3.Remove the knobs of the control box Ass'y.

4. Remove the screw securing the timer.

CONTROL BOX

SCREW

Disassembly and Reassembly

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Summary of Contents for M1914R

Page 1: ...R SERVICEManual 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: ... or inspection within the microwave generating compartments check the magnetron wave guide or transmission line and cavity for proper alignment integrity and connections d Any defective or misadjusted components in the interlock monitor door seal and microwave generation and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is releas...

Page 3: ...hes interlock monitor switch 12 If the fuse is blown by the Interlock Monitor Switch Replace all of the following at the same time Primary door sensing switch and power relay as well as the Interlock Monitor Switch The correct adjustment of these switches is described elsewhere in this manual Make sure that the fuse has the correct rating for the particular model being repaired 13 Design Alteratio...

Page 4: ...es this includes the filament voltage of the magnetron High voltage is present during any cook cycle Before touching any components or wiring always unplug the oven and discharge the high voltage capacitor See Figure 1 1 2 The high voltage capacitor remains charged about 30 seconds after disconnection Short the negative terminal of the high voltage capacitor to to the oven chassis Use a screwdrive...

Page 5: ...ics 2 1 TIMER 35 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 489 W x 275 H x 370 D ...

Page 6: ...t Selection 850w 3 Operating Instructions 3 1 Control Panel Samsung Electronics 3 1 3 2 Features External Views Door Ventilation Holes Light Safety Interlock Holes Control Panel Roller Ring Coupler Glass Plate Door Latches 489mm 275mm 370mm ...

Page 7: ...it any adjacent parts or it may be damaged NOTE2 When replacing the magnetron be sure to remount the magnetron gasket in the correct position and make sure the gasket is in good condition 1 Discharge the high voltage capacitor 2 Disconnect all the leads 3 Remove the mounting bolts 4 Reconnect the leads correctly and firmly 4 1 Replacement of High Voltage Transformer Lamp Magnetron H V Trans H V Ca...

Page 8: ... the figure insert and bend a thin metal plate between Door E and Door A until you hear the tick sound Insertion depth of the thin metal plate should be 0 5mm or less Insert flat screwdriver into the gap between Door A and Door C to remove Door C Be careful when handling Door C because it is fragile Then remove the door assembly 4 3 1 Removal of Door C 4 3 2 Removal of Door E Door C Door A Door E ...

Page 9: ... remount it in the correct position 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 4 4 Replacement of Fuse 4 5 Replacement of Drive Motor Disassembly and Reassembly Screw Drive Motor Cover Base Plate Drive Motor After replacement of the defective component parts of the door reassemble it ...

Page 10: ...ntrol Box 4 4 Samsung Electronics 1 Disconnect the connectors from the control box assembly 2 Remove screws securing the control box assembly 3 Remove the knobs of the control box Ass y 4 Remove the screw securing the timer CONTROL BOX SCREW Disassembly and Reassembly ...

Page 11: ...ondary Terminal Primary Terminals Secondary Approx 100Ω Filament Approx 0Ω Primary Approx 1 456Ω Cooling Fins Gasket Plate Magnetron Antenna 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 s...

Page 12: ... play in it Check for play in the door by pulling the door assembly Make sure that the latch keys move smoothly after adjustment is completed Completely tighten the screws holding the Latch Body to the oven assembly 4 Reconnect to Monitor switch and check the continuity of the monitor circuit and all latch switches again by following the components test procedures 5 Confirm that the gap between th...

Page 13: ...ion 4 When heating is finished stir the water again with the thermometer and measure the temperature T2 5 Subtract T1 from T2 This will give you the water temperature rise T 6 The output power is obtained by the following formula Output W 100 x T 7 Normal temperature rise for this model is 9 C to 11 C at HIGH NOTE 1 Variations or errors in the test procedure will cause a variance in the temperatur...

Page 14: ...a radiarion preventing device make a repair record for the measured values and keep the data 2 If the radiation leakage is more than 4 mW cm2 after determining that all parts are in good condition functioning properly and the identical parts are replaced as listed in this manual notift that fact to CENTRAL SERVICE CENTER 5 10 2 At least once a year have the microwave energy survey meter checked fo...

Page 15: ...fuse 2 Poor contact of Check continuity of power supply cord Also check Adjust or replace the power cord whether the power cord is securely wired power supply cord 3 Defective lamp The fan motor rotates but lamp does not light Replace the lamp Oven lamp 4 Defective timer Check the terminals of timer for continuity Replace the timer does not contacts turning the timer knob ON and OFF repeatedly lig...

Page 16: ...r tighten loose screw 1 Defective If the timer does not operate with 220 230V applied to the Replace timer Timer does timer motor terminals the timer motor amy be faulty not operate 2 Defective The lamp does not light Replace timer contacts of timer S W Cooking tray 1 Defective Check to see if 220 230V exists at the motor terminals Replace drive motor does not drive motor If so motor will be defec...

Page 17: ...eck the continuity of primary coil and secondary Replace the H V Trans coil If there is no continuity H V Transformer is H V Transformer former defective 7 Shorted H V Check the continuity of capacitor Replace the capacitor If the capacitor shorts the fuse blows H V Capacitor 8 Monitor fuse Check the monitor fuse Replace the blown out on the noise filter Monitor fuse 6 2 Unsatisfactory Cooking Sym...

Page 18: ...ded Views and Parts List 7 1 Exploded Views 7 1 M1 M2 M21 M22 M23 M24 M15 M26 M14 M16 M18 M19 M20 M3 M10 M12 M13 M11 M17 D1 D9 D2 D3 D4 D5 D6 D8 D7 B1 B2 B2 B3 B4 NC NO COM C2 C1 C3 C5 C6 C7 C8 C9 C4 M4 M27 M28 M5 M7 M6 M8 M9 M25 ...

Page 19: ...5 8 1 M13 DE91 70061A ASSY H V FUSE THV060T 0800 H 5KV 0 8A WHT 1 M14 DE91 70063A ASSY HVD V2M6 PI9 0 0 05MT 1 M15 DE26 00008A TRANS H V SHV 293EC 230V50HZ 2230V 3 15V DY 1 M16 DE31 10154A MOTOR DRIVE M2HJ49ZR02 ST 16 50 60HZ 1 M17 DE71 00015A COVER CEILING T0 3 W114 2 L121 5 CE2933 1 M18 DE80 10001F BASE PLATE SGCC T0 8 W345 L565 MW5896W 1 M19 DE61 40066A FOOT PP BLK 3RD W 2 M20 DE74 20015G TRAY ...

Page 20: ...ty Remarks B 1 DE66 40021A LATCH BODY POM F20 02 50G RE 330 1 B 2 3405 000178 SWITCH MICRO 250V 15A 200gf SPST NO 2 B 3 3405 000175 SWITCH MICRO 250V 15A 200gf SPST NO 1 B 4 DE66 90054A LEVER SWITCH POM F20 02 15G NTR RE 330 1 7 5 Body Latch Parts List Ref No Parts No Description Specification Q ty Remarks C 1 DE64 00007A KNOB TIMER ABS 10G WHT 20X47X35 M1914 1 C 2 DE71 00001A COVER PANEL ABS 94 3...

Page 21: ...HED 2 CN BOX DE60 10082H SCREW A 2S 4X12 TOOTHED 1 CV AIR DE60 10082H SCREW A 2S 4X12 TOOTHED 2 MO FAN DE60 10082H SCREW A 2S 4X12 TOOTHED 5 PN OUT DE60 10082H SCREW A 2S 4X12 TOOTHED 2 TCO DE60 10098A SCREW ASSY TAP TITE PH TC M4X8 SWRCH18A ZPC2 GLD W 2 M DRV DE60 10069A SCREW TAP TH TH M4 L10 FRFZY 1 DE60 10069A SCREW TAP TH TH M4 L10 FRFZY 1 DE60 10072A SCREW TAP TH TH M4 L16 FEFZY 2 SLOT 4 DE6...

Page 22: ...LACEMENT USE 16 GA 105 C THERMOPLASTIC COVERED WIRE EXCEPT FOR HIGH VOLTAGE LEADS OR AS NOTED ON SPECIAL LEADS POWER MUST BE DISCONNECTED BEFORE SERVICING THIS APPLIANCE MAGNETRON FA F RED RED RED RED SYMBOL COLOR BRN BROWN BLK BLACK RED RED BLU BLUE BRN BLU HIGH VOLTAGE TRANSFORMER HIGH VOLTAGE CAPACITOR HIGH VOLTAGE DIODE TO CHASSIS H V FUSE ...

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