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8. P.C.B Diagrams

8-1 P.C.B Diagrams

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

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Содержание M183STR

Страница 1: ... MICROWAVE OVEN 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 Manual M183STR BWT ...

Страница 2: ...s and latches 5 evidence of dropping or abuse c Before turning on microwave power for any service test 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 s...

Страница 3: ...ove their watches 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 Primary door sensing switch and powe...

Страница 4: ...igure 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 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 PRECAUTIO...

Страница 5: ...WER SOURCE POWER CONSUMPTION OUTPUT POWER OPERATING FREQUENCY MAGNETRON COOLING METHOD OUTSIDE DIMENSIONS NET WEIGHT 99 MINUTES 90SECONDS 230V 50Hz MICROWAVE 1 250W FROM 100W 850W 10 LEVEL POWER 2 450MHz OM75SH 31 ESS COOLING FAN MOTOR 489 275 385mm 13 5 kg ...

Страница 6: ...nstructions 3 1 Control Panel 3 2 Features External Views VENTILATION HOLES LIGHT DOOR LATCHES HANDLE DOOR COUPLER ROLLER RING SAFETY INTERLOCK HOLES TURNTABLE CONTROL PANEL WINDOW DISPLAY 489mm 355mm 275mm 180mm 400mm ...

Страница 7: ... does 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 4 2 Replacement of High Voltage Transformer 1 Discharge the high voltage capacitor 2 Disconnect all the leads 3 Remove the mounting bolts 4 Reconnect the leads correctly and firmly PRECAUTION Serviceme...

Страница 8: ...ragile Then 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 1 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 E Door A Door C 90 ...

Страница 9: ...operate properly check if any other part such as the control circuit board blower motor or high voltage transformer is defective 4 5 Replacement of Drive Motor 1 Take out the glass tray guide roller and coupler from cavity 2 Turn the oven upside down to replace the drive motor 3 Remove a screw securing the drive motor cover 4 Disconnect all the lead wires from the drive motor 5 Remove screws secur...

Страница 10: ...n your body and never touch the control circuit 2 Disconnect the connectors from the control circuit board 3 Remove screws securing the control box assembly 4 6 2 Removal of Ass y P C B 1 Remove screws securing the control circuit board 2 Lift up the control circuit board from the Ass y control box screw SCREW CONTROL BOX ...

Страница 11: ...ent or shorted magnetron 2 Isolate the magnetron from the circuit by disconnecting 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 PRECAUTION 1 High voltage is present at the high voltage terminals during any cook cycle 2 It is neither necessary nor advisab...

Страница 12: ...o specific adjustment during installation of Door Sensing Primary Interlock switch and Monitor switch to the latch body is necessary 3 When mounting the Latch Body to the oven assembly 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...

Страница 13: ...edure 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 9 Microwave Heat Distribution Heat Evenness The microwave heat distribution can be checked indirectly by measuring the water temperature ri...

Страница 14: ...en at the highest power level 4 Set survey meter dual ranges to 2 450MHz 5 Using the survey meter and spacer cone as described above measure near the opening of magnetron the surface of the air guide and the surface of the wave guide as shown in the following photo but avoid the high voltage components The reading should be less than 4mW cm2 5 12 Note on Measurement 1 Do not exceed the limited sca...

Страница 15: ... 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 resistance will bring lower magnetron filament voltage and cause magnetron to lower output and or intermittent oscillation 3 Defecti...

Страница 16: ...ce PCB main Loud buzzing noise can be heard 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 during cooking 1 Open or loose wiring of primary ...

Страница 17: ...oded Views M001 M038 T001 T017 M034 M132 M048 M039 M040 M042 M036 M035 M037 W002 M015 B018 B006 B001 B001 B002 B011 B010 M049 M051 M029 M043 M017 M019 M023 M022 M020 M157 C004 C003 C082 C005 C009 D006 D005 D002 D003 D049 D015 D004 D007 D011 D019 ...

Страница 18: ...230V50Hz 2400rpm 3rd 1 M029 DE47 20008A THERMOSTAT PW2N 52JC 100 60 250V 7 5A H 1 M034 DE67 00140A COUPLER NC2000 0 6 0 8 PPS ESS840 3G 1 M035 OM75P 31 ERHN ASSY MAGNETRON OM75P 31 ERHN 1 M036 4713 001046 LAMP INCANDESCENT 240V 104mA 25W ORG 1 M037 DE71 60457B COVER AIR 3RD 0 7 BTM PP 1 M038 DE26 00080B TRANS H V SHV EURO2 230V 50HZ 2340V 3 5V 1 M039 2501 001011 C OIL 910nF 2100V BK 54x35x75mm 20m...

Страница 19: ...WT BL 1 S N A D002 DE64 00625A DOOR A MW888STB ABS HG0760SR BL 1 D003 DE67 20196A SCREEN DOOR 3RD 0 7 S1 1 D004 DE94 00351B ASSY DOOR E COATING MW850WA BLK COATING 1 D005 DE64 00221B FILM DOOR T0 13 W264 L143 NC08 1 D006 DE64 40008B DOOR C PP CE745G BLK 1 D007 DE61 00198A SPRING KEY M1877 HSWR PI0 7 D6 23 1 4 1 D011 DE64 00211A DOOR KEY NC2000 0 6 0 8 1 2 PP BLK 1 D015 DE94 00459A ASSY DOOR SUB MW...

Страница 20: ... 2S 4X12 TOOTHED 2 OUT PA DE60 10082H SCREW A 2S 4X12 TOOTHED 1 P CORD DE60 10082H SCREW A 2S 4X12 TOOTHED 1 PCB GND DE60 10082H SCREW A 2S 4X12 TOOTHED 1 TCO DE60 10098A SCREW ASSY TAP TITE GLD SWRCH18A ZPC2 PH TC M4X8 WT 1 G MOTOR DE60 10195A SCREW STAR POLE SWCH18A 4 12 TH 2 ZNC 2 DE60 30016A NUT FLANGE M4 MSWR10 2 F MOTOR DE60 10088A SCREW TAP PH FEFZY PLAIN PH M3 L8 1 C PANEL DE60 10088A SCRE...

Страница 21: ... 19 8 P C B Diagrams 8 1 P C B Diagrams This Document can not be used without Samsung s authorization ...

Страница 22: ...00001 VARISTOR 470V 1250A 14x7 5mm TP 1 ZNR1 2007 000033 R CHIP 0OHM 5 1 8W DA TP 3216 8 J19 26 2007 000293 R CHIP 100OHM 5 1 8W DA TP 3216 7 R15 21 2007 000300 R CHIP 10KOHM 5 1 10W DA TP 2012 4 R07 09 11 2007 000468 R CHIP 1KOHM 5 1 10W DA TP 2012 6 R01 03 05 10 22 2007 000671 R CHIP 2KOHM 5 1 10W DA TP 2012 1 R02 2007 000931 R CHIP 470OHM 5 1 10W DA TP 2012 1 R06 2007 000941 R CHIP 47KOHM 5 1 1...

Страница 23: ...TAGE CAPACITOR BLK RED ORG WHT SYMBOL COLOR BLU BLK RED ORANGE WHITE BLUE BLACK VARISTOR L V TRANS LAMP MAIN RELAY POWER RELAY PRIMARY INTERLOCK SECONDARY INTERLOCK S W MGT CVT TCO FAN MOTORD MOTOR MONITOR SWITCH H V DIODE H V TRANSFORMER H V CAPACITOR 120V 0V F FA MAGNETRON POWER CORD AC 120V 60Hz BLK BLK ORG ORG ORG GRN BLU BLU BLK BLK GND FUSE WHT RED RED YEL YEL YEL COM NC 120V 125V 25W 21V 0V...

Страница 24: ...ectronics Co Ltd May 2003 Printed in Korea Code No DE68 03173A This Service Manual is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable International and or domestic law ...

Страница 25: ...0221B FILM DOOR D005 D005 W002 C082 M001 B018 T001 B006 B001 B001 B011 B002 B010 T017 C003 C005 C004 C009 D006 D004 D002 D049 D019 D011 D007 D015 M029 M020 M157 M023 M022 M017 M019 M015 M036 M037 M035 M039 M040 M042 M132 M038 M048 M049 M051 M034 D003 M043 ...

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