Samsung SESAB M957 Service Manual Download

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MICROWAVE OVEN

M957

SERVICE

Manual

MICROWAVE OVEN

CONTENTS

M957

1min+

Auto Defrost

Auto

Reheat & Cook

Stop / Cancel

Start

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

SESAB

Summary of Contents for SESAB M957

Page 1: ...957 M 1min Auto Defrost Auto Reheat Cook Stop Cancel Start 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 SESAB ...

Page 2: ...ELECTRONICS Samsung Electronics Co Ltd October 1997 Printed in Korea DE68 62311A ...

Page 3: ... 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 4: ...ondary interlock switches interlock monitor switch 12 If the fuse is blown by the Interlock Monitor Switch Replace all of the following at the same time Primary and secondary switches 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 ...

Page 5: ...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 6: ...COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS 517 W x 297 H x 385 D POWER LEVEL M957 10 100W 4 sec 26 sec 20 200W 7 sec 23 sec 30 300W 10 sec 20 sec 40 400W 13 sec 17 sec 50 500W 16 sec 14 sec 60 600W 19 sec 11 sec 70 700W 22 sec 8 sec 80 800W 25 sec 5 sec 90 900W 28 sec 2 sec 100 1000W 30 sec 0 sec ON TIME OFF TIME 2 2 Comparison Chart MODEL FEATURE MORE LESS AUTO COOK DISH AUTO DEFROST TIM...

Page 7: ...to Cook Reheat Button Dial Knob Time Weight and Auto Cook Code Selection Botton 3 Operating Instructions 3 1 Control Panel Samsung Electronics 3 1 3 2 Features External Views Door VentilationSlot Heater Light SafetyInterlockHoles ControlPanel GuideRoller GlassPlate DoorLatches M957 M 1min Auto Defrost Auto Reheat Cook Stop Cancel Start 517mm 297mm 385mm M957 M 1min Auto Defrost Auto Reheat Cook St...

Page 8: ...t 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 Cap...

Page 9: ...ndling Door C because it is fragile Following the procedure as shown in the figure insert and bend a thin metal plate between Door E and Door A until you hear the tick sound 1 Insertion depth of the thin metal plate should be 0 5mm or less 4 3 4 Removal of Key Door Spring Remove pin hinge from Door E Detach spring from Door E and key door 4 3 2 Removal of Door C 4 3 3 Removal of Door E Disassembly...

Page 10: ...e motor be sure to 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 4 3 5 Reassembly Test After replacement of the defective co...

Page 11: ...static electricity from your body and avoid touching the Touch control clrcuitry 2 Disconnect the connectors from the control circuit board 3 Remove screws securing the control circuit bord 4 Lift up the control circuit board from right side and remove the hooks holding the contol circuit board to the box assembly SCREWS ...

Page 12: ...minal 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 MODEL M957 Secondary Approx 130Ω Filament Approx 0Ω Primary Approx 1 700Ω Terminals Resistance 1 2 Input 1 ...

Page 13: ...mbly adjust 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 agai...

Page 14: ...ional 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 The microwave heat distribution can be checked indirectly by measuring the water temperature rise at certain positions in the oven 1 Prepare five beakers made of Pyrex having 100 milliliters capacit...

Page 15: ... 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 ß 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 RELECTRIC AB KAMMAKARGATAN 27 104 30 STOCKHOLM SWEDEN 5 13 2 At least once a year have the microwave en...

Page 16: ...witch 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 Sequence R...

Page 17: ...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 18: ... Views and Parts List 7 1 Exploded Views 7 1 M1 M2 M21 M22 M23 M24 M25 M26 M15 M16 M18 M19 M20 M3 M4 M5 M6 M7 M8 M10 M12 M13 M11 M29 M27 M28 M17 M30 D3 D2 D9 D10 D11 D1 D7 D8 D4 D5 D6 C4 C5 C6 C2 C7 C3 C1 M9 B1 B2 B4 B3 B5 NC NO COM ...

Page 19: ...PP 2 WHT M945 MB45 1 M 13 DE91 70101C ASSY THERMOSTAT MW5574W 160 60 187 HORIZ 1 M 15 DE26 10100F TRANS H V SHV 945EG1 230V 50HZ DPC 2290V 3 1 M 16 DE61 50106A BRACKET HVC SECC T0 8 W31 L125 8 1 M 17 2501 001019 C OIL 1 10uF 2100V BK 35x54x90 20mm 1 M 18 DE59 40001A DIODE H V HVR 1X 32B 12 1 M 19 DE91 70061A ASSY H V FUSE THV060T 0800 H 5KV 0 8A WHT 1 M 20 DE61 40017A FOOT PP A353 BLK MW5630T 2 M ...

Page 20: ... 26 77 ZPC3 WHT CHR 1 Ref No Parts No Description Specification Q ty Remarks C 1 DE91 10432A ASSY P C B MAIN 230V50HZ NS VFD M957 EURO 1 C 2 DE72 70182D CONTROL PANEL ABS 200 WHT M957 SDW 1 C 3 DE67 40147A WINDOW DISPLAY ACRYL SMOG M757 CE757G 1 C 4 DE66 20183B BUTTON SELECT B ABS HR 0370D WHT M757 SDW 1 C 5 DE66 20185A BUTTON SELECT A ABS WHT M757 CE757G 2 C 6 DE66 20184A BUTTON SELECT C ABS HR 0...

Page 21: ... B PLTE DE02 00029A TAPE SCOTCHPAR POLYESTER 3M 893 W50 2 DE60 10033A SCREW TH TH M4 L10 MSWR10 FEFZY 2 HI UPP DE60 10082A SCREW A M4 L12 2S TOOTHED 2 CON BX DE60 10082A SCREW A M4 L12 2S TOOTHED 1 CA AIR DE60 10082A SCREW A M4 L12 2S TOOTHED 1 MO FAN DE60 10082A SCREW A M4 L12 2S TOOTHED 1 NO FIL DE60 10098A SCREW ASSY TAPTITE PH TC M4X8 SWRCH18A Z 2 M GEAR DE60 10033A SCREW TH TH M4 L10 MSWR10 F...

Page 22: ...8 P C B Diagrams 8 1 P C B Diagrams Samsung Electronics 8 1 ...

Page 23: ...AL UP050F104Z 100NF 80 6 C06 09 12 15 2401 000247 C AL 1SA1ANB107MAN 100UF 20 10V GP 6 3X 1 C04 2401 000353 C AL 1SA1HWB101M 100UF 20 50V GP 10X16X 1 C02 2401 000914 C AL CESSL1C220M0511AA 22UF 20 16V GP 5 1 C05 2401 001412 C AL 1SG1VFB477MAN 470UF 20 35V GP 10X1 1 C01 3501 001014 RELAY POWER OM1F S 124LM 24V 21 8MA 17A 1 RY01 3501 001016 RELAY MINIATURE JV24 KT 24V 12 5MA 5A 1F 2 RY02 03 3708 000...

Page 24: ...RELAY POWER RELAY INRUSH RELAY DOOR SENSING SWITCH DOOR SENSING SWITCH RESISTOR POWER RELAY MAIN RELAY F FA MAGNETRON NO COM NO NO BLU YEL BRN BRN BRN BLK BLU BLK COM 0V LAMP 230V40W L V TRANS PRIMARY LATCH SWITCH NO COM ORG ORG MONITOR SWITCH L FM H V T H V D H V C H V FUSE 1mH BRN BROWN BLU BLUE ORG ORANGE RED RED WHT WHITE BLK BLACK YEL YELLOW GRN GREEN Y G YELLOW GREEN SYMBOL COLOR NOTE MAIN F...

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