Elenco Electronics XK-550 Instruction Manual
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Elenco Electronics XK-550 Instruction Manual

Digital / analog trainer a complete mini-lab for building, testing and prototyping analog and digital circuits
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DIGITAL / ANALOG TRAINER
MODEL XK-550
A COMPLETE MINI-LAB FOR BUILDING, TESTING
AND PROTOTYPING ANALOG AND DIGITAL CIRCUITS
Tools and meter not included.
Instruction Manual
For Trainer with Organizer Case
TM
Elenco
Electronics, Inc.
TM
Copyright © 2004, 1994 by Elenco
Electronics, Inc. All rights reserved.
Revised 2004
REV-G
753550
No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.

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Summary of Contents for Elenco Electronics XK-550

  • Page 1 DIGITAL / ANALOG TRAINER MODEL XK-550 A COMPLETE MINI-LAB FOR BUILDING, TESTING AND PROTOTYPING ANALOG AND DIGITAL CIRCUITS Tools and meter not included. Instruction Manual For Trainer with Organizer Case Elenco Electronics, Inc. Copyright © 2004, 1994 by Elenco Electronics, Inc. All rights reserved.
  • Page 2 GENERAL SPECIFICATIONS FOR MODEL XK-550 Power Supplies: • 0V to 20VDC @ .5 amp (0V to 15V @ 1 amp) • 0V to –20VDC @ .5 amp (0V to –15V @ 1 amp) • +12V +5% @ 1 amp • –12V +5% @ 1 amp •...
  • Page 3 USERS DESCRIPTION OF FRONT PANEL CONTROL Fuse holder - Easy access for replacement of 1.25A 250V fuse. On-Off switch - Allows power to be applied to all outputs. Switch will light when on. Power output terminals - This provides 30VAC center tapped at 15VAC - also provides output terminal for positive and negative variable voltages.

  • Page 4: Power Supply

    8 data switches. functions will make it easy to do your digital experiments. Your XK-550 has four basic trainers in a single package. They are, 5 independent power supplies, an analog trainer, a digital and a bredblock assembly trainer.

  • Page 5: Power Supply Testing

    TESTING THE XK-550 DIGITAL ANALOG TRAINER The following paragraphs give detailed instructions on testing the digital / analog trainer. Note that in the XK-550 trainer there are five major functions, (1) Power Supply (2) Logic Indicators (3) Function Generator (4) Logic Switches and (5) Data Switches.

  • Page 6: Circuit Description

    105 to 135V will have practically no effect on the output voltages. This is because of the specially designed IC circuits used in the XK-550 circuits. Severe overloading or even shorting the output circuits will not damage the supplies. Special turn-off circuits in the IC sense the overload and turn off the output.
  • Page 7 The 1N4001 has peak current rating of 10 amps. REGULATOR CIRCUIT The regulator circuit in the Model XK-550 power supply consists of a LM-317 integrated circuit. This IC is specially designed to perform the regulation function. Figure 6 shows a simplified circuit of how the LM-317 IC works.

  • Page 8: Schematic Diagram

    SCHEMATIC DIAGRAM...
  • Page 10 Transistor Q5 is called the pass transistor. controls the current reaching the output. Transistor Q3 and Q4 are emitter followers. Their function is to raise the impedance of the pass transistor. Note that transistor Q2, Q3, Q4, Q5 and resistor R1 form a close loop.
  • Page 11 The XR-2206 is comprised of four functional blocks, a voltage controlled oscillator (VCO), an analog multiplier & sine shaper, a unity gain buffer amplifier and a set of current switches. The VCO actually produces an output frequency proportional to an input current. Across pins 5 and 6, a timing capacitor, is switched on to give 5 different ranges of frequencies via COARSE FREQ.

  • Page 12: Parts List

    314148 Fuse Holder 323904 IC Socket 8-Pin 323906 IC Socket 14-Pin 330317 IC Socket 16-Pin 330337 18 Bredblox 4-Pin 330357 Label XK-550 Case 332206 Insulator Mica 337403 Insulator Washer 337805 5” Wire 20GA Red Stranded 337812 2’ Wire 22GA Jumper...
  • Page 13 (ST-2) 5” Long Nose Pliers (ST-6) #1 Phillips Screwdriver (ST-5) 3/16” Blade Screwdriver When ordering a meter to be used with the XK-550 trainer, specify a PSV-50 kit which will provide you with velcro hold the meter in place and an anti-static foam pad that fits below the meter for storage of ICs.

  • Page 14: Specifications

    POPULAR METERS THAT CAN BE USED WITH THE XK-550 TRAINER Model M-2795 Features • 3 3/4 digit, 4,000 count display • Audible continuity test • Data hold / rel. value • Frequency to 15MHz • Capacitance to 200µF • Transistor / diode / logic test •...

  • Page 15: Warranty Policy

    Your XK-550 Digital / Analog Trainer has been tested and conforms to our rigid requirements on performance and durability. It is guaranteed to be free of defects in workmanship, materials and construction for a period of 2 years. If this product should fail during normal use within the first 3 months from the date of purchase, Elenco the warranty period, a nominal service charge is required to cover shipping and handling.
  • Page 16 Elenco 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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