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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. Trouble shooting

7. Exploded Views and Parts List

8. PCB Diagrams

9. Schematic Diagrams

Manual

MG14

80STB

SEM

Содержание MG1480STB

Страница 1: ...MICROWAVE OVEN 1 Precaution 2 Specifications 3 Operating Instructions 4 Disassembly and Reassembly 5 Alignment and Adjustments 6 Trouble shooting 7 Exploded Views and Parts List 8 PCB Diagrams 9 Schematic Diagrams Manual MG1480STB SEM ...

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: ...hould 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 Primary door sensing switch...

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: ...TION OUTPUT POWER OPERATING FREQUENCY MAGNETRON COOLING METHOD OUTSIDE DIMENSIONS NET WEIGHT SHIPPING WEIGHT 99 MINUTES 99 SECONDS 120V60Hz AC MICROWAVE 1 500W GRILL 1 300W 950W IEC 705 TEST PROCEDURE 2 450MHz OM75P 31 ESS COOLING FAN MOTOR 555 W x 313 H x 464 D mm 18 5 kg 21 0 kg ...

Страница 6: ... 4 3 Operating Instructions 3 1 Control Panel 3 2 Features External Views VENTILATION HOLES GRILL LIGHT COUPLER DOOR DOOR LATCHES OPEN DOOR PUSH BUTTON SAFETY INTERLOCK HOLES TURNTABLE 555mm 313mm 464mm ...

Страница 7: ...ed 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 Servicemen should remove their watches whenever working clos...

Страница 8: ...l when handling Door C because it is fragile Then remove the door assembly 4 3 3 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 4 Removal of Key Door Spring Remove pin hinge from Door E Detach spring from Door E and key d...

Страница 9: ...rate 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 securing...

Страница 10: ...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 attached to the escutcheon...

Страница 11: ... 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 Primary Terminals Filament Terminals Secondary Terminal Magnetron Antenna Gasket Plate Cooling Fins PRECAUTION 1 High voltage is present at the high voltage terminals during any c...

Страница 12: ...h to Latch Body consult the figure 2 No specific adjustment during installation of Primary 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 adjustme...

Страница 13: ...cate glass weight 7 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 9 Microwave H...

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: ...tion 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 Def...

Страница 16: ... 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 interl...

Страница 17: ...MM13 MM171 MM30 MM31 MM14 MM27 MM28 MM52 MM55 MM65 MM172 MM03 MM17 MM08 MM09 MB01 MB05 MB03 MB08 MB02 MB04 MM06 MM71 MM07 MM59 MM64 MM29 MD07 MC05 MC04 MC02 MC03 MC06 MC07 MC13 MD02 MD10 MD06 MD11 MD05 MD17 MD04 MD08 MD09 MM72 MM57 MM62 MM63 MM68 MM61 MM60 MM132 MM69 MM34 MM18 MM20 MM21 MM19 ...

Страница 18: ...E74 20002C TRAY COOKING GLASS T6 1 MM19 DE92 90189V ASSY GUIDE ROLLER 3RD 1 0 CMO PI15 5 XAREC CERAMIC ENAMEL 1 MM20 DE67 00121A COUPLER PPS BROWN MW1455WA T4 3 23 1 1 MM21 DE39 40409A WIRE HARNESS E 230V50HZ M9G45 CTW 1 MM22 DE31 10154A MOTOR SYNCHRONOUS M2HJ49ZR02 ST 16 50 60HZ 1 MM27 DE61 40066A FOOT PP BLK 2 MM28 DE80 10002A BASE PLATE SGCC T 0 8 W 404 L 633 MW6574W 1 MM29 2501 001016 C OIL 95...

Страница 19: ...C13 DE94 00015C ASSY CONTROL PANEL CE2D33 P WHT W9501 S2 GRILL 1 MD01 DE94 00018Z ASSY DOOR MG1460WA XAX WHITE S2 GRILL 1 MD02 DE64 40325A DOOR A MWD49BW ABS WHT 1 MD03 DE67 00002B SCREEN DOOR ACRYL T1 5 W173 6 L373 5 CLEAR MW7896W01 1 MD04 DE94 00019K ASSY DOOR E MW7694W BLK COATING 3RD 1 3 1 MD05 DE01 00113B FILM DOOR 1 MD06 DE64 40010B DOOR C M245 PP TB53 1 2CU FT BLK 1 MD07 DE61 70128A SPRING ...

Страница 20: ...080B SCREW WASHER 2S SWRCH18A ZP2 PH PI5 L10 4 MGT DE60 10080B SCREW WASHER 2S SWRCH18A ZP2 PH PI5 L10 4 TNS HV DE60 10082H SCREW A 2S 4X12 TOOTHED 2 BD LAT DE60 10082H SCREW A 2S 4X12 TOOTHED 1 P C EA DE60 10082H SCREW A 2S 4X12 TOOTHED 1 S M EA DE60 10088A SCREW TAP PH FEFZY PLAIN PH M3 L8 1 MGT TCO DE60 10098A SCREW ASSY TAP TITE GLD SWRCH18A ZPC2 PH TC M4X8 WT 2 M DRIV DE60 10122A SCREW TAP TH...

Страница 21: ... 19 8 P C B Diagrams 8 1 P C B Diagrams ...

Страница 22: ...01037 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 12 13 16 2007 000282 R CHIP 100KOHM 5 1 10W DA TP 2012 2 R27 28 2007 000300 R CHIP 10KOHM 5 1 10W DA TP 2012 3 R07 08 09 2007 000346 R CHIP 120OHM 5 1 8W DA TP 3216 8 R19 26 2007 000468 R CHIP 1KOHM 5 1 10W DA TP 2012 9 R01 03 05 10 13 ...

Страница 23: ... OPENED POSITION NOTE FOR SERVICE REPLACEMENT USE 16 GA 105 C THERMOPLASTIC COVERED WIRE EXCEPT FOR HIGH VOLTAGE LEADS OR AS NOTED ON SPECIAL LEADS 1 INPUT 120V 60HZ 2 DOOR OPEN 3 LAMP ON 4 P C B PATTERN 5 P C B IN OUT POINT MGT TCO COM NC 120V 130V 40W 21V 0V NO L FM DM BLK BLK R RED RED ORG WHT BLK WHT ORG ORG WHT BLK MAGNETRON HIGH VOLTAGE DIODE TO CHASSIS FA F HIGH VOLTAGE TRANSFORMER POWER RE...

Страница 24: ...ELECTRONICS Samsung Electronics Co Ltd November 2001 Printed in Korea Code No DE68 02416A ...

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