Samsung SJ0390 Service Manual
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Samsung SJ0390, 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
Samsung SJ0390, 1. Precaution 1-1 Safety precautions ( ) Samsung Electronics 1-1 1. All repairs should be done in accordance with the procedures described in this manual. This product complies with Federal Performance Standard 21 CFR Subchapter J (DHHS). 2. Microwave emission check should be performed to prior to servicing if the oven is operative. 3. If the oven operates with the door open : Instruct the user not to operate the oven and contact the manufacturer and the center for devices and radiological health immed
Samsung SJ0390, 17. When checking the continuity of the witches or transformer, always make sure that the power is OFF, and one of the lead wires is disconnected. 18. Components that are critical for safety are indicated in the circuit diagram by shading, or . 19. Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications. A replacement part that does not have the same safety characteristics as the original might create shock, fire or other hazards. 1. High Voltage Warning
Samsung SJ0390, 2. Specifications 2-1 Table of Specifications Samsung Electronics 2-1 MODEL MW7592W / MW7593G ITEM TIMER 99 MINUTES 99 SECONDS POWER SOURCE 120V/60HZ, AC POWER CONSUMPTION MICROWAVE : 1,450W OUTPUT POWER FROM 100W TO 1000W (10 LEVEL POWER) (IEC-705 TEST PROCEDURE) OPERATING FREQUENCY 2,450MHz MAGNETRON OM75PH(31)ESS COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS 21 7/8 (W) x 12 5/16 (H) x 16 13/32 (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 MW7592W / M
Samsung SJ0390, Instant Reheat Button (Popcorn, Beverages, Pizza) Cooking Time Button Clear/Off Button 5 sec. 1 min. Hr. Min. P O P C O R N B E V E R A G E S O F F C L E A R P I Z Z A 3. Operating Instructions 3-1 Control Panel Samsung Electronics3-1 3-2 Features & External Views Door latches Door Control Panel Display Glass Cook Tray 281mm 330.5mm 316mm
Samsung SJ0390, 4. Disassembly and Reassembly 4-1 Replacement of Magnetron, Motor Assembly and Lamp Samsung Electronics 4-1 1. Discharge the high voltage capacitor. 2. Disconnect all the leads. 3. Remove the mounting bolts. 4. Reconnect the leads correctly and firmly. Remove the magnetron including the shield case, permanent magnet, choke coils and capacitors (all of which are contained in one assembly). 1. Disconnect all lead wires from the magnetron. 2. Remove the magnetron supporter. 3. Remove the air cover. 4. Remove screws securing the magnetron to the wave guide. 5. Take out the magnetron very carefully. 6. Remove screws from the back panel. 7. Take out the fan motor. NOTE1: When removing the
4-3 Replacement of Door Assembly 4-2 Samsung Electronics Disassembly and Reassembly Door A Door E Door C Key Door Spring Key 1. The door is serviced by individual parts complete doors are not available. 2. Insert a thin screwdriver into the gap between door a and door c to remove door c. Then remove the door assembly. 3. To remove the door assembly, lift up door assemb
Samsung Electronics 4-3 Disassembly and Reassembly 4-6 Replacement of Control Circuit Board 4-6-1 Removal of Ass'y Control Box 1. Be sure to ground any static electric charge in your body and never touch the touch control circuitry. 2. Disconnect the connectors from the control circuit board. 3. Remove screws securing the control box assembly. 4. Remove the screw securing the ground. 1. Rem
5-1 Samsung Electronics 5. Alignment and Adjustments 5-1 High Voltage Transformer 5-2 Low Voltage Transformer 5-3 Magnetron 1. Remove connectors from the transformer terminals and check continuity. 2. Normal resistance readings are as follows: (Room temperature = 20ûC) 1. Continuity checks can indicate only an open filament or a shorted magnetron. To diagnos
Samsung SJ0390, Samsung Electronics 5-2 5-4 High Voltage Capacitor 5-5 High Voltage Diode 5-6 Power Control Relay 5-7 Adjustment of Primary Switch, Door Sensing Switch and Monitor Switch 1. Check continuity of the capacitor with the meter set at the highest resistance scale. 2. Once the capacitor is charged, a normal capacitor shows continuity for a short time, and then indicates 9MW. 3. A shorted capacitor will show continuous continuity. 4. An open capacitor will show constant 9MW. 5. Resistance between each terminal and chassis should read infinite. 1. Isolate the diode from the circuit by disconnecting its leads. 2. With the ohm-meter set at th
Samsung SJ0390, Samsung Electronics The output power of the magnetron can be measured by performing a water temperature rise test. Equipment needed : * Two 1-liter cylindrical borosilicate glass vessel (Outside diameter 190 mm) * One glass thermometer with mercury column NOTE: Check line voltage under load. Low voltage will lower the magnetron output. Make all temperature and time tests with accurate equipment. 1. Fill the one liter glass vessel with water. 2. Stir water in glass vessel with thermometer, and record glass vessel's temperatu
Samsung SJ0390, Samsung Electronics 5-4 Alignment and Adjustments 5-12 Leakage Measuring Procedure 5-11 Note on Measurement 5-10 Check for Microwave Leakage 5-13-1 Record keeping and notification after measurement 1) After adjustment and repair of a radiarion preventing device, make a repair record for the measured values, and keep the data. 2) If the radiation leakage is more than 5 mW/cm 2 after determining that all parts are in good condition, functioning properly and the identical parts are replaced as listed in this manual notift that fact to ; CENTRAL SERVICE CENTER 5-13-2 At least once a year have the microwave energy survey meter checked for accuracy by its manufactur
Samsung SJ0390, 6. Troubleshooting PRECAUTION 1. CHECK GROUNDING BEFORE CHECKING FOR TROUBLE. 2. BE CAREFUL OF THE HIGH VOLTAGE CIRCUIT. 3. DISCHARGE THE HIGH VOLTAGE CAPACITOR. 4. WHEN CHECKING THE CONTINUITY OF THE SWITCHES OR TRANSFORMER, DISCONNECT ONE LEAD WIRE FROM THESE PARTS AND THEN CHECK CONTINUITY WITHOUT THE POWER SOURCE ON. TO DO OTHERWISE MAY RESULT IN A FALSE READING OR DAMAGE TO YOUR METER. 5. DO NOT TOUCH ANY PART OF THE CIRCUIT OR THE CONTROL CIRCUIT BOARD, SINCE STATIC DISCHARGE MAY DAMAGE IT. ALWAYS TOUCH GROUND WHILE WORKING ON IT TO DISCHARGE ANY STATIC CHARGE BUILT UP. 6-1 Electrical Maltunction SYMPTOM CAUSE CORRECTIONS Oven is dead. 1. Open or loose lead wire harness Check
Samsung SJ0390, Samsung Electronics 6-2 Troubleshooting SYMPTOM CAUSE CORRECTIONS Oven can program but timer 1. Open or loose wiring of secondary Adjust door and interlock switches. does not start. interlock switch 2. Off-alignment of primary interlock 3. Defective secondary interlock S/W Microwave output is low;. 1. Decrease in power source voltage. Consult electrician. Oven takes longer time to 2. Open or loose wiring of magnetron cook food. filament circuit. (Intermittent oscillation)) 3. Aging of magnetron Fan motor turns on when plugged in Loose wiring of door sensing switch Check wire of door sensing switch. O
Samsung Electronics 7-2 7-2 Main Parts List Exploded Views and Parts List Ref. No. Parts No. Description/Specification Q'ty Remarks 1 DE70-10012F PANEL-OUTER;SECC T0.5,W296.5,L931,-,MELON- 1 MELON-GREEN 1 DE70-10012J PANEL-OUTER;SECC T0.5,W296.5,L931,-,WINE-R 1 WINE-RED 1 DE70-10012B PANEL-OUTER;C/STEEL,T0.5,931,296.5,JE320GA 1 DARK-GRAY 2 DE64-40313B DOOR-C;PP,-,
Samsung SJ0390, 7-3 Samsung Electronics Exploded Views and Parts List Parts No. Description / Specification Q'ty Remarks DE60-10012A SCREW-TAP TITE;TH,+,3,M4,L10,SWR10,ZPC2,TOOTH 2 F/MOTOR DE60-10080A SCREW-WASHER;M5,L12,2S 4 HVT DE60-10082I SCREW-A;2S-4X12,FEFZY 2 B/LATCH DE60-10082I SCREW-A;2S-4X12,FEFZY 3 BASE/PLA DE60-10082I SCREW-A;2S-4X12,FEFZY 2 C/BOX DE60-10082I SCREW-A;2S-4X12,FEFZY 1 N/F-EARTH DE60-10082I SCREW-A;2S-4X12,FEFZY 3 O/PANEL DE60-10082I SCREW-A;2S-4X12,FEFZY 1 P/C EARTH DE60-10082I SCREW-A;2S-4X12,FEFZY 1 PCB-EARTH DE60-10082I SCREW-A;2S-4X12,FEFZY
Samsung SJ0390, 8-2 Samsung Electronics No. Parts No. Description / Specification Q'ty Remarks P 1 0401-001025 DIODE-SWITCHING;1N4148M,50V,450mA,DO-34,TP 1 D003,D004,D005,D006,D007 P 1 0401-001025 DIODE-SWITCHING;1N4148M,50V,450mA,DO-34,TP 1 D008,D009 P 2 0402-001103 DIODE-RECTIFIER;1T4,400V,1A,TS-1,TP 1 D001,D002 P 3 0403-000355 DIODE-ZENER;UZ5.1BSB,5.1V,4.97-5.18V,500mW 1 ZD01 P 4 0501-000388 TR-SMALL SIGNAL;KSC815,NPN,400mW,TO-92,BK,120- 1 TR03 P 5 0504-001014 TR-DIGITAL;KSR1005,NPN,300MW,4.7K/10K,TO-92,TP 1 TR01,TR02,TR04 P 6 1405-000001 VARISTOR;470V,2500A,14x8.5mm,TP 1 VA01 P 7 2001-000009
Samsung SJ0390, 9-1Samsung Electronics 9. Schematic Diagrams 9-1 Schematic 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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