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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

Summary of Contents for M1974R

Page 1: ...CEManual 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: ... 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: ...voltage capacitor to to the oven chassis Use a screwdriver 3 High voltage is maintained within specified limits by close tolerance safety related components and adjustments If the high voltage exceeds the specified limits check each of the special components 1 2 Pretaution Samsung Electronics 1 2 Special Servicing Precautions Continued 1 3 Special High Voltage Precautions PRECAUTION Never touch an...

Page 5: ...ics 2 1 TIMER 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 ...

Page 6: ...ton Start Button Drinks Button Deodorijation Button Auto Reheat Cook Selection Turn Table On Off 3 Operating Instructions 3 1 Control Panel 3 2 Features External Views Door Ventilation Holes Light Safety Interlock Holes Control Panel Roller Ring Coupler Glass Plate Door Latches 517mm 297mm 379mm ...

Page 7: ...es not hit 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 Tran...

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: ...s 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 2 Adjust so that the door has no play between ...

Page 10: ...emove the screw securing the ground tail of the keyboard 1 Pull the lever end of the plastic fastener and remove the Flexible Printed Circuit FPC of membrane panel 2 Remove screws securing the control circuit board 3 Lift up the control circuit board from the Ass y control box 4 When reconnecting the FPC connector make sure that the holes on the connector are properly engaged with the hooks on the...

Page 11: ...t terminal and magnetron case should read open 1 The low voltage transformer is located on the control circuit board 2 Remove the low voltage transformer from the PCB Ass y and check continuity 3 Normal resistor reading is shown in the table Filament Terminals Secondary Terminal Primary Terminals Secondary Approx 100Ω Filament Approx 0Ω Primary Approx 1 450Ω Terminals Resistance 1 2 Input 1 000Ω 3...

Page 12: ...ust the Latch Body by moving it so that the oven door will not have any 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 fol...

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 12 2 At least once a year have the microwave energy survey meter checked f...

Page 15: ...sing switch 3 Defective monitor switch NOTE1 4 Shorted HVCapacitor 5 Shorted HVTransformer NOTE2 NOTE 1 All of these switches must be replaced at the same time refer to adjustment instructions Check continuity of power relay contacts and if it has continuity replace power relay also NOTE 2 When HVTransformer is replaced check diode and magnetron also Oven does not accept 1 Key input is not in Sequ...

Page 16: ...noise can be heard 1 Loose fan and fan motor Tighten screws of fan motor 2 Loose screws on H V Transformer Tighten screws of H V Transformer 3 Shorted H V Diode Replace H V Diode Turntable motor does not rotate 1 Open or loose wiring of turntable motor Replace turntable motor 2 Defective turntable motor Oven stops operation during cooking 1 Open or loose wiring of primary Adjust door and latch swi...

Page 17: ...ews and Parts List 7 1 Exploded Views 7 1 M1 M21 M22 M23 M27 M2 M24 M15 M28 M14 M16 M26 M18 M19 M20 M3 M4 M5 M25 M6 M7 M8 M9 M10 M12 M13 M11 M17 D1 D2 D3 D4 D5 D6 D7 D9 D8 B1 B2 B2 B3 B4 NC NO COM C2 C1 C3 C7 C13 C5 C8 C6 C10 C11 C9 C4 ...

Page 18: ... ROLLER MW5896W 1 M13 DE67 60081A COUPLER PPS 3RD 1 0 1 3 1 M14 DE71 60458A COVER AIR PP TB53 78G WHT 3RD 1 0 1 3 MW5896W 1 M15 DE26 00008A TRANS H V SHV 293EC 230V50HZ 2230V 3 15V DY 1 M16 DE61 50106A BRACKET HVC SECC T0 8 W31 L125 8 1 M17 2501 001107 C OIL 1 1uF 2 1KV BK 54x35x85 20mm 1 M18 DE91 70063A ASSY HVD V2M6 PI9 0 0 05MT 1 M19 DE91 70061A ASSY H V FUSE THV060T 0800 H 5KV 0 8A WHT 1 M20 D...

Page 19: ... 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 90054C LEVER SWITCH PP HANDLE FB44N 1 7 5 Body Latch Parts List Ref No Parts No Description Specification Q ty Remarks C 1 DE67 40145A WINDOW DISPLAY ACRYL T2 W40 L77 SMOG 30G 1 C 2 DE71 00031Z COVER PANEL ABS M1974R BWT WHT 3RD 1 0 FISH2 1 C 3 DE72 00052A CONTROL PANEL ABS M1974R BW...

Page 20: ...A ZP2 2S 4 TNS HV DE60 10082H SCREW A 2S 4X12 TOOTHED 3 B PLTE DE60 10082H SCREW A 2S 4X12 TOOTHED 2 BD LAT DE60 10082H SCREW A 2S 4X12 TOOTHED 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...

Page 21: ...8 P C B Diagrams 8 1 P C B Diagrams Samsung Electronics 8 1 ...

Page 22: ...31 R32 R33 P25 2001 000034 R CARBON 220OHM 5 1 4W AA TP 2 4X6 4MM 1 R40 P26 2001 000290 R CARBON 10KOHM 5 1 8W AA TP 1 8X3 2MM 6 R07 R08 R10 R20 R21 R23 P26 2001 000290 R CARBON 10KOHM 5 1 8W AA TP 1 8X3 2MM 2 R35 R36 P27 2001 000429 R CARBON 1KOHM 5 1 8W AA TP 1 8X3 2MM 5 R03 R04 R05 R18 R19 P28 2001 000435 R CARBON 1MOHM 5 1 8W AA TP 1 8X3 2MM 1 R22 P29 2001 000515 R CARBON 220OHM 5 1 8W AA TP 1...

Page 23: ...9 1 Samsung Electronics 9 Schematic Diagrams 9 1 Schematic Diagrams ...

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