Elenco Electronics FG-500K Assembly And Instruction Manual
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Elenco Electronics FG-500K Assembly And Instruction Manual

Elenco Electronics FG-500K Assembly And Instruction Manual

Function generator kit
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FUNCTION GENERATOR KIT
MODEL FG-500K
Assembly and Instruction Manual
Elenco
Electronics, Inc.
®
Copyright © 2005 by Elenco
®
Electronics, Inc. All rights reserved.
Revised 2005
REV-B
753069
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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  • Page 1 FUNCTION GENERATOR KIT MODEL FG-500K Assembly and Instruction Manual Elenco Electronics, Inc. ® Copyright © 2005 by Elenco ® Electronics, Inc. All rights reserved. Revised 2005 REV-B 753069 No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.

  • Page 2: Parts List

    PARTS LIST If you are a student, and any parts are missing or damaged, please see instructor or bookstore. If you purchased this kit from a distributor, catalog, etc., please contact Elenco mail is at the back of this manual) for additional assistance, if needed. DO NOT contact your place of purchase as they will not be able to help you.
  • Page 3 IDENTIFYING RESISTOR VALUES Use the following information as a guide in properly identifying the value of resistors. BAND 1 1st Digit Color Bands Black Multiplier Brown Tolerance Orange Yellow Green Blue Violet Gray White IDENTIFYING CAPACITOR VALUES Capacitors will be identified by their capacitance value in pF (picofarads), nF (nanofarads) or mF (microfarads). Most capacitors will have their actual value printed on them.
  • Page 4 CONSTRUCTION Introduction The most important factor in assembling your FG-500K Function Generator Kit is good soldering techniques. Using the proper soldering iron is of prime importance. A small pencil type soldering iron of 25 - 40 watts is recommended. The tip of the iron must be kept clean at all times and well tinned.
  • Page 5 ASSEMBLE COMPONENTS TO THE PC BOARD Care must be given to identifying the proper components and in good soldering habits. Refer to the soldering tips section in this manual before you begin installing the components. Place a check mark in the box each step is complete.
  • Page 6 ASSEMBLE COMPONENTS TO THE PC BOARD R2 - 10kW Potentiometer Hex Nut 7mm (see Figures Ea & Eb) S1 - 6 position Rotary Switch (see Figure F) R3 - 100kW Potentiometer (see Figures Ea and Eb) Battery Snap (see Figure G) Figure Ea Cut off tab Mount the pot down flush with the PC...
  • Page 7 Install the colored binding posts to the panel as shown in Figure I. Use the hardware shown in the figure. Make sure that the small nut is tight. WIRING (See Figure J and Ja) Solder the wire from hole J1 on the PC board to the first yellow binding post as shown.

  • Page 8: Final Assembly

    FINAL ASSEMBLY Fit the panel onto the PC board assembly. Be sure that all switches and pots come through the holes in the panel as shown in Figure K. Place the washers onto their locations as shown in Figure K, being careful to check the sizes. Then, tighten the hex nuts onto the potentiometers and rotary switch noting their size as shown in Figure K.
  • Page 9 Attach the battery snap to the battery. Insert the PC board assembly with the panel and battery into the case (as shown in Figure L). Insert two 4-40 x 1/4” screws into the bottom case in positions shown in Figure M and tighten in place.

  • Page 10: Troubleshooting Guide

    In each of the following steps, start with the switch and pots as shown on the previous page. 2) OUTPUT WAVEFORMS Connect an oscilloscope probe to the square wave output. You should see about 8V peak to peak square wave of a little over 15Hz.

  • Page 11: Functional Description

    FUNCTIONAL DESCRIPTION The FG-500 is a function generator integrated circuit capable of producing high quality sine, triangle, and square waves of high stability and accuracy. A picture of each waveform is shown below: Sine Wave THEORY OF OPERATION The heart of the FG-500 Function Generator is the XR-2206 monolithic function generator integrated circuit.
  • Page 12 CONTROLS RANGE SWITCHES Six ranges of frequency are provided by the range switch as shown in Table 1. POSITION SINE/TRIANGLE SWITCH This SINE/TRIANGLE Switch selects the waveform, sine wave or triangle wave, sent to the SINE/TRIANGLE output terminal. FREQUENCY MULTIPLIER The multiplier is a variable control allowing frequency settings between fixed ranges.

  • Page 13: Schematic Diagram

    SCHEMATIC DIAGRAM -12-...
  • Page 14 QUIZ 1) The heart of the FG-500 Function Generator is the _________ monolithic function generator integrated circuit. 2) The XR-2206 comprised ____________________, ____________________, and ____________________. 3) The VCO actually produces an output frequency proportional to an input ________________. 4) The current switches route one of the currents to the VCO to produce an output __________. 5) The frequency is determined by the formula _______________.
  • Page 15 EMPTY PAGE...
  • Page 16 Elenco ® Electronics, Inc. 150 Carpenter Avenue Wheeling, IL 60090 (847) 541-3800 Website: www.elenco.com e-mail: elenco@elenco.com...

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