Samsung M1833NR Service Manual Download Page 24

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9. Schematic Diagrams

9-1 Schematic Diagrams

( This Document can not be used without Samsung’s authorization )

RED

BRN

BLU

HIGH VOLTAGE
TRANSFORMER

H.V.FUSE

HIGH VOLTAGE CAPACITOR

HIGH VOLTAGE
DIODE

TO CHASSIS

MAGNETRON

SYMBOL

BRN
BLK
RED
BLU
ORG

COLOR
BROWN
BLACK
RED
BLUE
ORANGE

RED

ASSY NOISE FIL TER

MGT TCO, CAVITY TCO

PRIMAR Y S/W

BRN

COM

BRN

WHT

230V

ORG

COM

H.V.TRANS

H.V.FUSE

(0.75A)

H.V.C

H.V

MAGNETRON

MONITOR

S/W

BLK

GRN

BRN

Y/G

BLU

POWER

CORD

230~50Hz

BLK

BLU

MONIT OR FUSE

(250V 1.6A)

BLU

ASSY PCB BORD

BLK

ORG

GRN

GROUND

ORG

DOOR SENSING

SWITCH

INRUSH RELA Y

POWER RELA Y

(SECONDAR Y INTERLOCK)

MAIN RELA

L.V.TRANS

2200pF

0.1uF

1mH

2200pF

250V10A

FUSE

500K

P.T.C

YEL

21V

BRN

BROWN

RED

BLU

BLUE

YEL

YELLOW

Y/G

YELLOW/GREEN

ORG

ORANGE

WHT

WHITE

BLK

BLACK

GRN

GREEN

SYMBOL

COLOR

NOTE

1. INPUT : 230V
2. DOOR : OPEN
3. LAMP : ON
4. : ASSY NOISE FILTER PATTERN
5. : PCB PATTERN

F/M

D/M

Summary of Contents for M1833NR

Page 1: ...ICROWAVE 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 P C B Diagrams 9 Schematic Diagrams SER M1833NR ...

Page 2: ...l is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable International and or domestic law Samsung Electronics Co Ltd January 2005 Printed in Korea Code No DE68 03697A ...

Page 3: ...ction 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 released to the...

Page 4: ...es while repairing an MWO 11 To avoid any possible radiation hazard replace parts in accordance with the wiring diagram Also use only the exact replacements for the following parts Primary and secondary 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 Pri mary door sensing switch and power relay as wel...

Page 5: ...he 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 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 H V Diode Short H V Capa...

Page 6: ...IONS OVEN DIMENSIONS SHIPPING DIMENSIONS SHIPPING WEIGHT APPROX 99 MINUTES 90 SECONDS 220V 50Hz AC MICROWAVE 1 150W FROM 100 TO 800W IEC 705 TEST PROCEDURE 2 450MHz OM75S 31 ESS COOLING FAN MOTOR 489mm W x 275mm H x 361mm D 306mm W x 211mm H x 320mm D 557mm W x 329mm H x 434mm D NET 12 5kg GROSS 14 0kg 2 1 Table of Speciﬁcations ...

Page 7: ...Operating Instructions 3 1 Control Panel 3 2 Features External Views VENTILATION HOLES LIGHT DISPLAY COUPLER DOOR DOOR LATCHES OPEN DOOR PUSH BUTTON SAFETY INTERLOCK HOLES ROLLER RING CONTROL PANEL TURNTABLE ...

Page 8: ...d NOTE 2 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 PRECAUTION Servicemen should remove their watches when ever working close to or replacing the magnetron PRECAUTION T...

Page 9: ...en remove the door assembly 4 3 2 Removal of Door E 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 Insertion depth of the thin metal plate should be 0 5mm or less 4 3 3 Removal of Key Door Spring Remove pin hinge from Door E Detach spring from Door E and key door Door A Door C Door E Door E Key Door Spring ...

Page 10: ... tip coupler 6 Screw the motor to bottom of oven cavity 7 Connect leads to the drive motor 8 Screw the drive motor cover to the base plate with a screw driver NOTE Bring the spare screw from service center COVER FIXING SCREW MACHINE SCREW 6006 001170 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 lowe...

Page 11: ... 4 When reconnecting the FPC connector make sure that the holes on the connector are properly engaged with the hooks on the Plastic Fastener 4 6 3 Removal of Window Display Membrane Panel 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 double ...

Page 12: ... open ﬁla ment or a shorted magnetron To diagnose an open ﬁlament or shorted magnetron 2 Isolate the magnetron from the circuit by discon necting its leads 3 A continuity check across the magnetron ﬁlament terminals should indicate one ohm or less 4 A continuity check between each ﬁlament terminal and magnetron case should read open 5 3 Magnetron 5 1 High Voltage Transformer Filament Terminals Pri...

Page 13: ...y tighten the screws holding the Latch Body to the oven assembly 4 Reconnect to Monitor switch and check the continu ity of the monitor circuit and all latch switches again by following the components test procedures 5 Conﬁrm that the gap between the switch housing and the switch actuator is no more than 0 5mm when door is closed 6 Interlock Switch Replacement When replacing faulty switches be sur...

Page 14: ...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 temperature rise Additional power test should be made if temperature rise is marginal NOTE 2 Output power in watts is computed by multiplying the temperature rise step 5 by a factor of 91 times the of centigrade temperature 5 8 Output Power of Magnetron The m...

Page 15: ...or seam is taken near a corner of the door keep the probe perpendicular to the areas making sure that the probe end at the base of the cone does not get closer than 5cm to any metal If it gets closer than 5cm erroneous readings may result 5 Measured leakage must be less than 4mW cm2 after repair or adjustment Maximum allowable leakage is 5mW cm2 4mW cm2 is used to allow for measurement and meter a...

Page 16: ...n or loose connection of membrane key pad to Ass y PCB 3 Shorted or open membrane panel 4 Defective Ass y PCB Refer to operation procedure Replace PCB main Timer starts countdown but no microwave oscillation No heat while oven lamp and fan motor turn on 1 Off alignment of latch switches 2 Open or loose connection of high voltage circuit especially magnetron ﬁlament circuit NOTE Large contact resis...

Page 17: ...1 Loose fan and fan motor 2 Loose screws on H V Transformer 3 Shorted H V Diode Tighten screws of fan motor Tighten screws of H V Transformer Replace H V Diode Turntable motor does not rotate 1 Open or loose wiring of turntable motor 2 Defective turntable motor Replace turntable motor Oven stops operation dur ing cooking 1 Open or loose wiring of primary inter lock switch 2 Operation of thermal cu...

Page 18: ... Exploded Views M001 M020 M022 M015 M037 M035 M049 M099 D049 M051 W002 M030 M036 M017 M019 C082 D007 C007 C006 C004 C005 C009 C003 D002 D003 D011 D006 D004 D005 M034 T017 T001 M039 M040 M041 M042 M038 M047 M048 B018 B006 B001 B009 B001 B002 ...

Page 19: ...C 100 60 250V 7 5A H 1 CVT TOP LEFT M034 DE67 00140A COUPLER PPS ESS840 3G BRN NEW 1 M035 OM75S 31 ESNL ASSY MGT OM75S 31 ESNL 1 M036 4713 001046 LAMP INCANDESCENT 240V 104mA 25W ORG 1 M037 DE71 60457A COVER AIR 3RD W0 7 PP T1 7 W115 5 L150 1 M038 DE26 00099A TRANS H V SHV EURO1 1 230V 50HZ 2330V 3 1 M039 2501 001016 C OIL 950nF 2 1KV BK 35x54x80 20mm 1 M040 DE61 00139A BRACKET HVC NC2000 SECC T0 ...

Page 20: ...86 1 C009 DE67 40175A WINDOW DISPLAY SAN SMG 5g 1 C082 ASSY CONTROL BOX 230V 49HZ M1833NR BWT P 1 S N A D002 DE64 40322Y DOOR A ABS P WHT M1733R BWT TDS S 1 D003 DE67 20186A SCREEN DOOR SAN T2 2 W354 L224 SMOG 3RD 1 D004 DE92 50133C ASSY DOOR E MW4593G BLK 3RD 0 7 1 D005 DE01 00112A FILM DOOR PET L268 T0 15 W150 NTR 1 D006 DE64 40008B DOOR C PP CE745G BLK 1 D007 DE61 00198A SPRING KEY M1877 HSWR D...

Page 21: ... A 2S 4X12 FEFZY 4 PANEL OUTER DE60 10051A SCREW TAP PH MSWR PH M4 L6 1 DRIVE MOTOR 6002 001320 SCREW TAPPING TH 2S M4 L8 PASS STS304 1 OUT PANEL LEFT 6006 001170 SCREW TAPPING WS TH M4 L10 ZPC YEL 1 EARTH NOISE FILTER 6006 001170 SCREW TAPPING WS TH M4 L10 ZPC YEL 1 EARTH POWER CORD 6006 001170 SCREW TAPPING WS TH M4 L10 ZPC YEL 1 S MEMBRANE DE60 10080A SCREW TAPPING M5 L12 2S 3 HVT DE60 10080A S...

Page 22: ...16 2203 000555 C CER CHIP 0 02NF 5 50V C0G TP 2012 2 C08 C09 2203 001608 C CER CHIP 22nF 80 20 50V Y5V TP 2012 4 C04 C06 C07 C10 2401 000037 C AL 470uF 20 16V GP TP 8x11 5 5 1 C02 2401 000244 C AL 100uF 20 10V GP TP 6 3x7 5 1 C03 2401 000911 C AL 22uF 20 16V GP TP 5x7 5 2 C05 C12 2401 002075 C AL 4 7uF 20 50V GP TP 5x11 5 1 C11 2401 002598 C AL 220uF 20 50V GP TP 10x16 5 1 C01 2801 003214 CRYSTAL ...

Page 23: ... 19 8 P C B Diagrams 8 1 P C B Diagrams This Document can not be used without Samsung s authorization ...

Page 24: ...N WHT WHT 230V ORG COM NO H V TRANS H V FUSE 0 75A H V C FA F H V D MAGNETRON MONITOR S W NC BLK BLK GRN BRN Y G BLU L N POWER CORD 230 50Hz BLK BLU MONIT OR FUSE 250V 1 6A BLU ASSY PCB BORD BLK ORG GRN GROUND ORG DOOR SENSING SWITCH INRUSH RELA Y POWER RELA Y SECONDAR Y INTERLOCK MAIN RELA Y L V TRANS 2200pF 0 1uF 1mH 2200pF 250V10A FUSE 500K P T C YEL 21V 0V BRN BRN BROWN RED RED BLU BLUE YEL YE...

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