Samsung MR1031UWC Service Manual Download

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SERVICE

MICROWAVE OVEN

CONTENTS

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

MR1031UWC
MR1032UBC

SEA

Summary of Contents for MR1031UWC

Page 1: ...WAVE 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 MR1031UWC MR1032UBC SEA ...

Page 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...

Page 3: ...ould remove 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 Secondary door sensing switc...

Page 4: ...he 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 screwdriver 3 High voltage is maintained within specified limits by close tolerance safety related components and adjustments If the high voltage exceeds the specified...

Page 5: ...ONSUMPTION OUTPUT POWER OPERATING FREQUENCY MAGNETRON COOLING METHOD OUTSIDE DIMENSIONS NET WEIGHT SHIPPING WEIGHT 99 MINUTES 99SECONDS 120VAC 60Hz MICROWAVE 1 500W 1000W 10 LEVEL POWER 2 450MHz OM75P 31 ESS COOLING FAN MOTOR 2011 32 W x 1311 32 H x 145 8 D 40 8 lbs 36 3 lbs ...

Page 6: ...ting Instructions 3 1 Control Panel 3 2 Features External Views Door Ventilation Holes Light Safety Interlock Holes Control Panel Open Door Push Guide Roller Glass Tray Door Latches 517mm 369mm 297mm 216mm 379mm ...

Page 7: ...TALLATIONS OR FREESTANDING APPLICATIONS ADJACENT TO WITHIN 2 FEET OF ANY GAS OR ELECTRIC RANGE COOKTOP OR OVEN PLUG THE THREE PRONG POWER CORD INTO A PROPERLY GROUNDED OUTLET 120V 60Hz OVEN INSTALLATION ALIGN THE SCREW HOLES ON UPPER AND LOWER TRIMS TO THE HOLES ON THE TOP ENCLOSURE AND BOTTOM ENCLOSURE AND SECURE SCREWS Fig 1 PLUG POWER CORD INTO RECEPTACLE AND SLIDE OVEN INTO CABINET SECURE OVEN...

Page 8: ... fragile 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 ...

Page 9: ...heck 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 from cavity 2 Turn the oven upside down to replace the drive motor 3 Remove a screw securing the drive motor cover or disconnect the drive motor cover from base plate by nipper 4 Disconnect all the lead wires from the d...

Page 10: ...ol 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 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 ...

Page 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...

Page 12: ...lt the figure 2 No specific adjustment during installation of Primary switch Secondary switch Door Sensing 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 smoothl...

Page 13: ...y 3 seconds included as a holding time of magnetron oscillation 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 Power 4 187 x 1000 x T 0 55xMcx T2 T1 44 Heating Time sec 41 41 Counting Time sec 4 187 Coefficient for...

Page 14: ...n 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 cm 2 5 11 Note on Measurement 1 Do not exceed the limited sca...

Page 15: ...ountdown 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 Defective high voltage components H V Transformer...

Page 16: ...g 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 latch switch 2 Operation of the...

Page 17: ... M001 M049 M051 M015 W002 M099 M039 M040 M038 T001 T017 M034 M047 M048 M029 M035 M036 M037 B018 B006 B004 B009 B002 M046 M019 D006 C082 C007 C006 C004 C005 C003 C009 D049 D002 D011 D007 D004 D015 D005 D003 P020 U011 U010 U009 B001 M023 M157 M022 M020 M018 ...

Page 18: ...A COUPLER 5TH 1 0 PPS 1 M035 OM75P 31 ERHN ASSY MAGNETRON OM75P 31 ERHN 1 M036 4713 001102 LAMP INCANDESCENT 125V 25W TRP 25x 1 M037 DE63 00208A COVER AIR 5TH 1 0 PP 1 M038 DE26 00088A TRANS H V SHV U1040A 120V 60HZ 2220V 3 3 1 M039 2501 001016 C OIL 950nF 2 1KV BK 35x54x80 20mm 1 M040 DE61 50106A BRACKET HVC SECC T0 8 W31 L125 8 1 M046 DE60 60025A PIN FOOT PP JI350 BLK 4 M047 DE61 40065A FOOT PP ...

Page 19: ...AN T2 0 SMOG 1 C082 ASSY CONTROL BOX 120V60Hz MR1031UWC XAA 1 MR1031UWC S N A C082 ASSY CONTROL BOX 120V60Hz MR1031UBC XAA 1 MR1032UBC S N A D002 DE64 40317M DOOR A MW1030WA ABS GENERAL WHT T2 1 MR1031UWC D002 DE64 40317T DOOR A MW1030BA ABS HR0370 T2 0 BLK NC 1 0 1 MR1032UBC D003 DE67 20197D SCREEN DOOR MW1030WC PET T0 25 W210 4 L3 1 D004 DE94 00910A ASSY DOOR E COATING MW1030WC XAA BLK 5T 1 D005...

Page 20: ...ZY PLAIN PH M3 L8 2 DE60 10059A SCREW TAP TH SUS410 CR TH M4 L8 2 C CEILING DE60 10070A SCREW TAP TH FEFZY 2 SLOT TH M4 L12 3 B PLTE DE60 10070A SCREW TAP TH FEFZY 2 SLOT TH M4 L12 2 BD LAT DE60 10070A SCREW TAP TH FEFZY 2 SLOT TH M4 L12 2 CN BOX DE60 10070A SCREW TAP TH FEFZY 2 SLOT TH M4 L12 1 CV AIR DE60 10070A SCREW TAP TH FEFZY 2 SLOT TH M4 L12 2 MGT TCO DE60 10070A SCREW TAP TH FEFZY 2 SLOT ...

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

Page 22: ...P 7033 SOT 89 3P SINGLE 0V P 1 IC03 1203 001037 IC VOLTAGE REGULATOR 78L05 SOT 89 3P 185MIL PLASTIC 1 IC02 1405 000001 VARISTOR 470V 1250A 14x7 5mm TP 1 ZNR1 2007 000033 R CHIP 0OHM 5 1 8W DA TP 3216 4 J11 J13 J16 2007 000282 R CHIP 100KOHM 5 1 10W DA TP 2012 2 R27 R28 2007 000300 R CHIP 10KOHM 5 1 10W DA TP 2012 3 R07 R08 R09 2007 000346 R CHIP 120OHM 5 1 8W DA TP 3216 8 R19 R26 2007 000468 R CHI...

Page 23: ...D WIRE EXCEPT FOR HIGH VOLTAGE LEADS OR AS NOTED ON SPECIAL LEADS POWER MUST BE DISCONNECTED BEFORE SERVICING THIS APPLIANCE BLK BLU BLK RED RED RED RED WHT BLK RED WHT ORG ORG RED BLU BLU MAGNETRON HIGH VOLTAGE DIODE TO CHASSIS FA F HIGH VOLTAGE TRANSFORMER POWER RELAY DOOR SENSING SWITCH BOTTOM MONITOR SWITCH CENTER BLK WHT SECONDARY SWITCH TOP HIGH VOLTAGE CAPACITOR RED ORG WHT SYMBOL COLOR BLU...

Page 24: ...e Manual 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 June 2003 Printed in Korea Code No DE68 03208A ...

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