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POWER SUPPLY KIT

MODEL XP-620K

Elenco

TM

Electronics, Inc.

Assembly and Instruction Manual

Copyright © 2003, 1989 Elenco

TM

Electronics, Inc.

Revised 2003 REV-O

75320K

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Содержание XP-620K

Страница 1: ...POWER SUPPLY KIT MODEL XP 620K Elenco TM Electronics Inc Assembly and Instruction Manual Copyright 2003 1989 ElencoTM Electronics Inc Revised 2003 REV O 75320K...

Страница 2: ...1 Qty Description Part 1 Transformer 440720 1 PC Board 512013 1 Fuse 1 25A 530125 1 Rocker Switch 541204 1 Cover 611120 1 Chassis 612020 1 Heat Sink 615010 2 Knob 622009 1 Strain Relief 624003 5 Insu...

Страница 3: ...citor Diode Transistor Integrated Circuit Transformer PC Board Fuse Heatsink Switch Knob Strain Relief PC Board Stand off Binding Post Assembly Fuse Assembly Flat Washer Lockwashers Mica Nuts 7mm 6 32...

Страница 4: ...eir actual value printed on them Some capacitors may have their value printed in the following manner The maximum operating voltage may also be printed on the capacitor Second Digit First Digit Multip...

Страница 5: ...mponent Lead Solder Soldering Iron Drag Foil 1 Solder all components from the copper foil side only Push the soldering iron tip against both the lead and the circuit board foil 2 Apply a small amount...

Страница 6: ...and D5 1N5400 Diode D6 1N5400 Diode D7 1N5400 Diode D8 1N5400 Diode see Figure A C1 10mF Electrolytic C2 10mF Electrolytic C3 10mF Electrolytic C4 10mF Electrolytic C8 10mF Electrolytic see Figure B C...

Страница 7: ...ure the wires when cutting them to their required lengths 4 5 6 7 4 Red Hole K 4 Orange Hole J 3 Red Hole I 3 Orange Hole H 3 Blue Hole G 4 Blue Hole F 4 Red Hole E 6 Blue Hole D 6 Red Hole C 3 1 2 Re...

Страница 8: ...ockwasher 8mm flat washer and 7mm nut Turn both potentiometer shafts all the way counter clockwise Line up the line on the knobs with the first line on the voltage scale Press knobs onto the shaft of...

Страница 9: ...together with pliers Then insert the strain relief into the hole One side of the transformer has only 2 black wires Cut these wires so that they are 4 1 2 in length see Figure H Strip the insulation o...

Страница 10: ...o the chassis using a 6 32 x 3 8 screw and a 6 32 large nut in the location shown in Figure J Strip the insulation off of both ends of the 6 red 20 ga wire to expose 1 4 of bare wire Solder one end of...

Страница 11: ...rough the rectangular hole in the chassis to the ICs and solder into place Tin the leads Form the end of the wires into a tight loop for easy tight connection to leads before you apply solder Figure K...

Страница 12: ...re M from PC board to right lead of LM 7805 After wiring be sure that the leads do not touch each other and cause a short Solder the wires from the PC board to the potentiometers as shown in Figure L...

Страница 13: ...ies should read between 2 and 16 volts The 5V supply should read between 4 50 and 5 50 volts Next short the output of each supply They should turn off and recover when the short is removed If you have...

Страница 14: ...ing It should read about 12 volts If not check the diode bridge or C7 2 Measure the DC voltage at the output of the diode bridge It should read about 12 volts If not check the diode bridge or C7 3 If...

Страница 15: ...that the current will flow Only when the transformer voltage is positive will current flow through the diodes Figure 3 shows the simplest possible rectifier circuit This circuit is known as a half wav...

Страница 16: ...e is connected to a stable 1 5V reference voltage The base of Q2 is connected to the regulator output circuit through a voltage divider network The collector of transistor Q2 is connected to a current...

Страница 17: ...over 3A Transistor Q2 is biased off until the LM 7805 IC draws about 2A When 2A is drawn by the LM 7805 IC the voltage drop across the 3 ohm resistor is 6V enough to turn on transistor Q2 Transistor...

Страница 18: ...l value capacitor with a high voltage value C Large value capacitor D 90O out of phase rectification circuit 6 An in efficient rectification circuit usually contains A large gaps between cycles B twic...

Страница 19: ...Voltage 1 1 5 15VDC 1A at 120V input 2 1 5 15VDC 1A 3 5VDC 3A Output Regulation 200mV each supply Line Regulation 100mV each supply Ripple Max 5mV rms Current Protection 1A limit 2 15VDC 3A limit 5VD...

Страница 20: ...ElencoTM Electronics Inc 150 W Carpenter Avenue Wheeling IL 60090 847 541 3800 http www elenco com e mail elenco elenco com...

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