Samsung SJ0390 Service Manual Download Page 1

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MICROWAVE OVEN

SJ0390

(MELON-GREEN / WINE-RED / DARK-GRAY)

SERVICE

Manual

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

SECA

Summary of Contents for SJ0390

Page 1: ...K GRAY SERVICE Manual 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 SECA ...

Page 2: ...tor 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 power relay 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 Warning Use exac...

Page 3: ...o measureany of the high voltages 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 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 ...

Page 4: ...0W 10 LEVEL POWER IEC 705 TEST PROCEDURE OPERATING FREQUENCY 2 450MHz MAGNETRON OM75PH 31 ESS COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS 217 8 W x 125 16 H x 1613 32 D NET WEIGHT 38 6 lbs SHIPPING WEIGHT 43 lbs 2 2 Comparison Chart MODEL FEATURE MORE LESS O AUTO REHEAT O AUTO DEFROST O KITCHEN TIMER O POWER LEVEL O INSTANT COOK O ONE MINUTE O CHILD LOCK O CLOCK O DEMO MODE O GENTLE COOK O...

Page 5: ...g Time Button Clear Off Button 5 sec 1 min Hr Min POPCORN BEVERAGES OFF CLEAR PIZZA 3 Operating Instructions 3 1 Control Panel Samsung Electronics 3 1 3 2 Features External Views Door latches Door Control Panel Display Glass Cook Tray 281mm 330 5mm 316mm ...

Page 6: ...ws from the back panel 7 Take out the fan motor NOTE1 When removing the magnetron make sure that its antenna 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 PRECAUTION Servicemen should remov their watches ...

Page 7: ...erlock switch door sensing switch monitor switch and power relay 3 When the above three switches operate properly check if any other part such as the control circuit board blower motor or high voltage transformer is defective 4 4 Replacement of Fuse After replacement of the defective component parts of the door reassemble it and follow the instructions below for proper installation and adjustment ...

Page 8: ...ly 4 Remove the screw securing the ground 1 Remove screws securing the control circuit board 2 Lift up the control circuit board from the Ass y control box 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 ap...

Page 9: ...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 175 2W Filament Approx 0 08W Primary Approx 1 998W Terminals Resistance 1 2 Input 1 300...

Page 10: ...e 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 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 sw...

Page 11: ...f 50 times the of centigrade temperature 4 187 x 1000 x DT Output Power 82 82 Heating Time sec 4 187 Coefficient for Water 1000 Water cc DT Temperature Rise T2 T1 5 8 Output Power of Magnetron CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT ALLOW EXPOSURE TO MICROWAVE RADIATION FROM MICROWAVE GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY 5 3 Alignment and Adjustments 5 9 Procedure for Meas...

Page 12: ...l 2 Pour 275 15cc of 20 5ûC 68 9ûF water in a beaker which is graduated to 600cc and place the beaker in the center of the oven 3 Start the oven 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 arnear the opening of magnetron the surface of the air guide and the surface of the wave guide as shown in the follow...

Page 13: ...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 Refer to ...

Page 14: ...PCB main to the plugged in mode Loud buzzing 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 Oven stops operation during cooking 1 Open or loose wiring of primary Adjust door and latch switches interlock switch 2 Operation of thermal cutout Cavity Sparks 1 Metallic war...

Page 15: ...Samsung Electronics 7 Exploded Views and Parts List 7 1 Exploded Views 1 33 31 36 30 27 26 29 23 22 25 24 28 21 17 16 18 19 15 14 12 13 11 10 8 9 2 5 4 3 6 7 32 37 20 38 39 34 35 40 7 1 ...

Page 16: ...C XAC 1 WINE RED 13 DE66 20283K BUTTON SELECT B ABS D GRY SJ0390 D XAC 1 DARK GRAY 14 DE72 70213T CONTROL PANEL ABS SJ0390 A XAC MELON GRN SECA 1 MELON GREEN 14 DE72 70213R CONTROL PANEL ABS SJ0390 C XAC WINE RED SECA 1 WINE RED 14 DE72 70213S CONTROL PANEL ABS SJ0390 D XAC DARK GRY SECA 1 DARK GRAY 15 DE64 90162B DECORATION ABS M308 A MOUNTAIN GREEN 1 MELON GREEN 15 DE64 90162C DECORATION ABS HR0...

Page 17: ...L12 FEFZY FA 1 BKT HVC DE60 10098A SCREW ASSY TAP TITE PH TC M4X8 SWRCH18A ZPC2 GLD W 1 ASSY TCO DE60 30015A NUT FLANGE M5 P0 8 MSWR10 FEFZY 4 MGT DE60 10088A SCREW TAP PH PH M3 L8 FEFZY PLAIN 4 PCB MAIN DE60 10088A SCREW TAP PH PH M3 L8 FEFZY PLAIN 3 PCB SUB 7 3 Standard Parts List Ref No Parts No Description Specification Q ty Remarks 36 DE39 00005A ASSY POWER CORD 120V JE320WAC GAC 1 37 DE47 20...

Page 18: ...Samsung Electronics 8 1 8 P C B Diagrams 8 1 P C B Diagram ...

Page 19: ...11 C012 P15 2202 002037 C CERAMIC MLC AXIAL 100nF 80 20 50V Y5V TP 2 2x3 1 C005 C006 C007 C008 P16 2401 000244 C AL 100uF 20 10V GP TP 6 3x7 5 1 C002 P17 2401 000914 C AL 22uF 20 16V GP TP 5x11 5 1 C004 C009 P18 2401 001363 C AL 470uF 20 16V GP TP 10x12 5 5 1 C001 P19 2401 002075 C AL 4 7uF 20 50V GP TP 5x11 5 1 C010 P20 2401 002598 C AL 220uF 20 50V GP TP 10x16 5 1 C003 P21 2802 000161 RESONATOR ...

Page 20: ... Diagram WARNING POWER MUST BE DISCONNECTED BEFORE SERVICING THIS APPLINACE NOTE CIRCUIT SHOWN WITH DOOR IS 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 RELAY ...

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