Samsung M945CE Service Manual Download Page 22

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9. Schematic Diagrams

9-1 Schematic Diagrams

9-1

230V~
50Hz

VOLTAGE
FREG

BRN

BLK

BLU

BLK

YEL

ORG

BLU

21V

230V

WHT

BLU

500K

2200pF

LIN-CAPACITORT 0.1uF

ASSY NOISE FILTER

MGT

TCO

CAVITY

TCO

MONITOR

FUSE

PRIMARY

SWITCH

INRUSH RELAY

MONITOR

SWITCH

L.V.T

MAIN

RELAY

POWER

RELAY

INRUSH

RELAY

DOOR

SENSING

SWITCH

DOOR

SENSING

SWITCH

RESISTOR

POWER RELAY

MAIN

RELAY

MAGNETRON

COM

BLU YEL

BRN

BRN BLK

BLU BLK

COM

LAMP

(230V40W)

L.V.TRANS

PRIMARY
LATCH
SWITCH

COM

ORG

MONITOR
SWITCH

H.V.T

H.V.D

H.V.C

H.V.FUSE

1mH

BRN

BROWN

BLU

BLUE

ORG

ORANGE

RED

WHT

WHITE

BLK

BLACK

YEL

YELLOW

GRN

GREEN

Y/G

YELLOW/GREEN

SYMBOL

COLOR

NOTE

MAIN FUSE

1. INPUT : 230V
2. DOOR : OPEN
3. LAMP : ON
4. : P.C.B PATTERN
5. : P.C.B IN/OUT

POINT

ASSY MAIN P.C.B

Samsung Electronics

Summary of Contents for M945CE

Page 1: ...anual 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 SEAU ...

Page 2: ...k 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 Alteration Warn...

Page 3: ...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 4: ...OD COOLING FAN MOTOR OUTSIDE DIMENSIONS 517 W x 297 H x 385 D POWER LEVEL M945CE 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 O AUTO COOK DISH O AUTO DEFROST O TIME CO...

Page 5: ... Button Auto Defrost Auto Cook More Less Clock Stop Cancel Start 1min Memory Hold Timer Power levels portion 10 s 10 min hours 1 min min kg lbs g oz Soup Sauce Casserole Stew Plated meals Chicken rice Drinks Pasta sauce 3 Operating Instructions 3 1 Control Panel Samsung Electronics 3 1 3 2 Features External Views Door VentilationHoles Heater Light SafetyInterlockHoles ControlPanel OpenDoorPush But...

Page 6: ...y 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 Capacit...

Page 7: ...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 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 4 3 4 Removal of Key Door Spring Disassembly...

Page 8: ...hen replacing the drive 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 After replacement of the defective co...

Page 9: ...onnecting the FPC connector make sure that the holes on the connector are properly engaged with the hooks on the Plastic Fastener 1 Window display should not be disassembled as its mounting tabs will be broken If repair work is difficult replace with Ass y control panel 2 The membrane key board is attached to the escutcheon base with doublefaced adhesive tape Therefore applying hot air such as usi...

Page 10: ...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 130W Filament Approx 0W Primary Approx 1 700W Terminals Resistance 1 2 Input 1 000W 3...

Page 11: ...djust 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 f...

Page 12: ...n 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 DT 6 The output power is obtained by the following formula 7 Normal temperature rise for this model is 9ûC to 11ûC at HIGH NOTE 1 Variations or errors in the test procedure will cause a variance in the temperature rise Additional ...

Page 13: ...pair of 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 13 2 At least once a year have the microwave energy survey meter ch...

Page 14: ...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 15: ...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 16: ...Views and Parts List 7 1 Exploded Views 7 1 M1 M2 M32 M21 M22 M23 M31 M24 D1 D2 D3 D5 D6 M25 M26 M15 M14 M16 M18 M19 M20 M3 M4 M5 M33 M34 M6 M7 M8 M30 M9 M10 M12 M13 M11 M29 B1 B2 B4 B3 M27 D4 D7 D8 D9 D9 M28 M17 C1 C2 C3 C4 C5 C6 C7 ...

Page 17: ...G1 3 240V 2380V 3 20V 1 M16 DE61 50106A BRACKET HVC SECC T0 8 W31 L125 8 1 M17 2501 001014 C OIL 1 05uF 2100V BK 35X54X85 20mm 1 M18 DE59 40001A DIODE H V HVR 1X 32B 12 1 M19 DE91 70061A ASSY H V FUSE THV060T 0800 H 5KV 0 8A WHT 1 M20 DE61 40017A FOOT PP A353 BLK MW5630T 2 M21 DE31 10154A MOTOR DRIVE M2HJ49ZR02 ST 16 50 60HZ 1 M22 DE80 10001A BASE PLATE SGCC T0 8 345 565 1 M23 DE47 20173A THERMOST...

Page 18: ... DOOR PC T0 15 275 175 MW5574W 1 Ref No Parts No Description Specification Q ty Remarks C 1 DE66 20006E BUTTON PUSH ABS VH 0855 P WHT M745 EUW 1 C 2 DE61 70076A SPRING BUTTON HSWR PI0 6 1 C 3 DE34 00003B SWITCH MEMBRANE PET M945CE XSA SEAU 1 C 4 DE67 40002A WINDOW DISPLAY RESIN ACRYLIC T2 3 M945 IDEO 1 C 5 DE72 70007B CONTROL PANEL RESIN ABS 120GR WHT VH 0800 M 1 C 6 DE91 10401A ASSY PCB MAIN 230V...

Page 19: ...SCREW A 2S 4X12 TOOTHED 2 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 10088A SCREW TAP PH PH M3 L8 FEFZY PLAIN 2 PCB DE60 10098A SCREW ASSY TAP TITE PH TC M4X8 SWRCH18A ZPC2 GLD W 1 CV TCO DE60 10098A SCREW ...

Page 20: ...8 P C B Diagrams 8 1 P C B Diagrams Samsung Electronics 8 1 ...

Page 21: ...5 50V SL TP 1 9x3 5 2 C07 C08 P18 2202 000780 C CERAMIC MLC AXIAL 100nF 80 20 50V Y5V TP 3 5x1 5 C05 C06 C09 C10 C19 P19 2401 000244 C AL 100uF 20 10V GP TP 6 3x7 5 1 C03 P20 2401 000914 C AL 22uF 20 16V GP TP 5x11 5 1 C04 P21 2401 001415 C AL 470uF 20 35V GP TP 10x20 5 1 C01 P22 2401 001573 C AL 47uF 20 50V GP TP 6 3x11 2 5 1 C02 P23 2802 000143 RESONATOR CERAMIC 4 19MHz 0 5 TP 10 0x5 0x7 5mm 1 X...

Page 22: ...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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