Elenco Electronics XP-15, XP-15K Assembly And Instruction Manual

POWER SUPPLY KIT

MODEL XP-15K

Assembly and Instruction Manual

PARTS LIST

If any parts are missing or damaged, see instructor or bookstore. DO NOT contact your place of purchase as
they will not be able to help you.
Contact Elenco Electronics (address/phone/e-mail is at the back of this manual) for additional assistance, if
needed.

RESISTORS

Qty. Description Color Code Part #

1 130Ω 5% 1/4W brown-orange-brown-gold 131300
1 1.5kΩ 5% 1/4W brown-green-red-gold 141500
12kΩ Potentiometer 192422

CAPACITORS

Qty. Description Par t #

110µF 25V Electrolytic (axial) 271055
1 1,000µF 25V Electrolytic (radial) 291045

SEMICONDUCTORS

Qty. Description Par t #

2 1N4001 Diode 314001
1 LM-317 Regulator 330317
1 LED Red 350002

MISCELLANEOUS

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Qty. Description Part #

1 T r ansformer YD-1485 440111
24” Solder 551124
1 Faceplate 614040
1 Knob 622009
1 Chassis Box 623240
1 Bushing 2 Wire 624002
1 Binding Post Black 625031
2 Nut Binding Post 625031HN
2 Lockwasher Binding Post 625031LW
1 Binding Post Red 625032
2 Screw 4-40 x 1/4” 641430
2 Screw 6-32 x 5/16” 641641

Qty. Description Part #

4 Screw #6 x 3/8” Self-tapping 643652
1 Nut 7mm 644101
2 Nut #4 644400
2 Nut #6 644600
1 Washer 8mm 645101
1 Lockwasher 5/16” 646101
2 Lockwasher #4 646401
2 Lockwasher #6 646600
1 Terminal Str ip 651003
10” 22 Ga. Red Wire 814220
1 Line Cord 2 Wire 862100
2” Shrink Tubing 890120

PARTS VERIFICA TION

Before beginning the assembly process, familiarize yourself with the components and this instruction book.
Verify that all of the parts are present. This is best done by checking off the parts in the par ts list.

Resistors Capacitor Semiconductors

Electrolytic

(radial)

Diode

2kΩ

Potentiometer

LM-317

Regulator

LED

Knob

T ransf ormer YD-1485

Electrolytic

(axial)

Binding Post with Nuts & Lockwasher

Miscellaneous

Bushing 2 Wire

Ter minal Str ip

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INTRODUCTION

Assembly of your XP-15 Regulated Variable P o w er Supply Kit will prove to be an exciting project and give much
satisfaction and personal achievement. If you have experience in soldering and wiring technique, you should
have no problem in the assembly of this kit. Care must be given to identifying the proper components and in
good soldering habits. Above all, take your time and follow the easy step-by-step instructions. Remember, “An
ounce of prevention is worth a pound of cure”. Avoid making mistakes and no problems will occur.

USE SAFETY GOGGLES WHEN ASSEMBLING THIS KIT!!

SOLDERING TECHNIQUES

The most important factor in assembling your power supply is good soldering techniques. Using the proper
soldering iron is of prime importance. A small pencil type iron of about 25-40 watts is recommended.The tip of
the iron should be kept clean at all times and well tinned (coated with a thin layer of molten solder). To keep the
tip clean, wipe it from time-to-time with a damp sponge. Size and care of the tip will eliminate problems. Use
only rosin core solder of 63/37 alloy. DO NOT USE ACID CORE SOLDER!!

Whenever possible, attach wire leads onto terminal lugs by forming tight mechanical connections before you
apply solder. For a good soldering job, heat the areas to be soldered sufficiently, so that the solder flows freely.
Position the soldering iron firmly against the wire lead and terminal. Apply the solder simultaneously to the
component lead or wire lead and to the terminal strip to be soldered so that good solder flow will occur. Remove
the solder feed when enough molten solder has been applied to form a thin coating on all metal parts in the
connection. After the solder feed has been removed, continue to heat the connection for an instant. This will
aid in the flow of the molten solder and insure against flux pockets. A properly soldered connection will have a
smooth bright finish. Do not blob the solder over the lead because this can result in a cold solder joint.

SPECIFICATIONS FOR XP-15 POWER SUPPLY

Output Voltage 1.25 - 15VDC
Output Current 0.5A @ 8V, 0.3A @ 12V, 0.2A @ 15V
Load Regulation 0.1V
Line Regulation 0.1V
Ripple Max. 0.01V RMS
Short Protection IC THERMO
Output Impedance 0.1 ohm

PANEL ASSEMBLY

Install the potentiometer with the lugs down as shown in Figure A.
Remove the tab as shown. Fasten in place with the parts as shown in
Figure B.

Turn the shafts on the pots fully counter-clockwise. Push the knobs onto the shafts so that
the line on the knob lines up with the end of the circle on the front panel as shown. If the knob is loose on
the pot shaft, insert a screwdriver in to the slot and expand the slot slightly. If the knob has a set screw,
tighten the set screw located on the side of the knob.

Install the binding posts with the colors in the order as shown in Figure A. Remove the large nut and the
lockwasher. Inser t the post into the hole and fasten it with the nut and lockwasher (see Figure C). Tighten
down the nut with pliers.

Install the transformer with the black wires as shown in Figure A. Use a 6-32 x 5/16” screw , a #6 lockwasher
and a #6 nut on each side to fasten in place as shown in Figure D.

Install the LM-317 IC as shown in Figure A. Use the par ts as shown in Figure E.
Install the terminal strip as shown in Figure A. Use a 4-40 x 1/4” screw and a #4 nut and #4 lockwasher as

shown in Figure F.
Install the LED. Push the LED in place with the flat side as shown in Figure A.

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Lockwasher

Nuts

Plastic Washer

Figure C

Figure A

Figure B

Black Wires

Transformer

Terminal

Strip

Figure D

Flat

Side

LED

Binding

Posts

Black

Red

LM317 IC

Potentiometer

#6 Lockwasher

#6 Nut

6-32 x 5/16”

Screw

Figure E

Figure F

4-40 x 1/4” Screw

#4 Lockwasher

#4 Nut

#4 Lockwasher
#4 Nut

LM317

IC

4-40 x 1/4” screw

Potentiometer

5/16” Lockwasher

8mm Washer

7mm Nut

Flat

Remove

Tab