Elenco Same as XP720 in Kit Form User Manual

POWER SUPPLY KITMODEL XP-720KAssembly ManualCopyright © 2012, 1998 by ELENCO®All rights reserved. Revised 2012 REV-G 753269No part of

-9-rSlip the 1/2” diameter shrink tubing over the 6” 20 ga. red wire and the smooth or round line cord wire. Solderthe line cord wire to the end lug o

-10-WIRE BINDING POSTS AND 317, 337Solder the wires from the board to the binding posts, as shown in Figure K.r 3” Orange wire from (G) on the PC boar

-11-WIRE 2N6124, 7805 & POTENTIOMETERSInsert the wires from the PC board through therectangular hole in the chassis to the 2N6124and LM-7805, sold

-12-FINAL ASSEMBLYr Fasten the heat sink to the chassis with two 6 x 3/8” black pan head screws, as shown in Figure M.r Fit the cover onto the chassis

-13-TESTING THE XP-720 POWER SUPPLYTesting the XP-720 Power Supply is very simple. Before applying power to the unit, be sure that all wiring andsold

-14-CIRCUIT DESCRIPTIONIntroductionThe Model XP-720 Power Supply features three solid-state DC power supplies and a 12.6VAC center tappedoutput. The

-15-In practice, the current through the diodes is not as shown in Figure 2C. Becausecapacitor C5 has a charge after the first cycle, the diode will

-16-The LM-317 IC is basically a 1.25V regulator. To be able to vary the output1.25 - 15V, we stack the IC on a DC voltage as shown in Figure 6A. Wh

-17-1. AC voltage is supplied to the rectifier stages by the . . .r A. step up transformer.r B. step down transformer.r C. 1 to 1 transformer.r D. AC

SPECIFICATIONS ON XP-720 POWER SUPPLYInput Voltage 110-130VACCurrent Protection 1AOutput Voltage 1) 1.25-15VDC @ 1A(at 120V input) 2) –1.25 - –15VDC @

PARTS LISTIf you are a student, and any parts are missing or damaged, please see instructor or bookstore.If you purchased this kit from a distributor,

Elenco®Electronics, Inc.150 Carpenter AvenueWheeling, IL 60090(847) 541-3800Website: www.elenco.come-mail: [email protected]

-2-PARTS IDENTIFICATIONResistor 2kΩ Potentiometer Capacitor Diode TransistorIntegrated Circuit Transformer PC Board FuseHeatsinkSwitchKnobStrain Relie

-3-Warning:If the capacitor isconnected withincorrect polarity, itmay heat up andeither leak, orcause the capacitorto explode.IDENTIFYING RESISTOR VAL

-4-CONSTRUCTIONSolderSoldering IronFoilSolderSoldering IronFoilComponent LeadSoldering IronCircuit BoardFoilRosinSoldering iron positionedincorrectly.

-5-ASSEMBLE COMPONENTS TO PC BOARDFigure ADiodes have polarity. Be surethat the band is in the correctdirection.Figure BElectrolytics have apolarity m

-6-PC BOARD WIRINGCut the 22 gauge wires to the required length. Strip 1/4” of insulation off of both ends. Insert the lead into thehole and solder

-7-r Install binding posts 1-7 with the colors in order, as shown in Figure D. Insert the post into the hole and fastenit with the nut and lockwasher

Carefully bend the leads of IC1, IC2,IC3 and Q2 on the heat sink at rightangles with pliers.Install IC1, IC2 and Q2 in the positionsshown in Figure E.