Basic Electronic Troubleshooting for Biomedical Technicians Preview

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Table of contents and first chapter from this book by Nicholas Cram and Selby Holder

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<ul><li><p>Basic ElEctronictrouBlEshooting for</p><p>BiomEdical tEchnicians</p><p>nicholas cramsElBy holdEr</p></li><li><p>Basic ElectronicTroubleshooting forBiomedical Technicians</p><p>Nicholas CramMS, CBET, CHSP</p><p>Texas State Technical College Waco</p><p>Selby HolderCBET</p><p>Texas State Technical College Waco</p></li><li><p> 2005 Nicholas Cram and Selby Holder</p><p>All rights reserved, including the right to reproduce this book or any portion thereof in any form. Requests for such permissions should be addressed to:</p><p>TSTC PublishingTexas State Technical College Waco3801 Campus DriveWaco, TX 76705</p><p>TSTC Publishing:publishing.tstc.edu</p><p>Publisher: Mark LongBook layout &amp; design: Joe BrooksCover design: Domeanica CarterPrinting production: Bill EvridgePre-press technician: Madeline AdamsGraphics interns: James Brown, Joseph Chilton, Jason Evans, Jacob Figueroa, Kimberly Foster, Joshua Hicks, Matthew Huckestein, Renee Kelley, Ebony Miles, Marcello Milteer, Charles Miskovsky, Zachary Oldham, Daniel Saragosa, Jonathan Streb, and Katherine WilsonEditorial intern: Candace WatersSpecial thanks: Glen Ridings, TSTC Waco, and Maxey Parrish, Baylor University</p><p>Publishers Cataloging-in-Publication(Provided by Quality Books, Inc.)</p><p> Cram, Nicholas. Basic electronic troubleshooting for biomedical technicians / Nicholas Cram, Selby Holder. -- 1st ed. p. cm. LCCN 2005904065 ISBN 0-9768503-0-3</p><p> 1. Medical electronics--Handbooks, manuals, etc. 2. Biomedical technicians--Handbooks, manuals, etc. 3. Medical instruments and apparatus--Maintenance and repair--Handbooks, manuals, etc. I. Holder, Selby. II. Title.</p><p> R856.15.C73 2005 610.284 QBI05-600071</p><p>Manufactured in the United States of America</p><p>First edition</p></li><li><p>Table of ContentsIntroduction ........................................................................................................vii</p><p>Chapter 1: Electric Shock &amp; Industrial Safety Systems ...................................1</p><p> Chapter Objectives ....................................................................................................................... 1 Safety Practices ............................................................................................................................. 1 Macroshock and Microshock ...................................................................................................... 4 Monitoring and Testing Devices ................................................................................................ 6 The Concept of Grounding ......................................................................................................... 9 Glossary ....................................................................................................................................... 11 Additional Suggested References ............................................................................................ 12 Chapter Review .......................................................................................................................... 13 Laboratory Safety Rules ............................................................................................................ 15 Laboratory Exercise 1.1 ............................................................................................................. 17 Laboratory Exercise 1.2 ............................................................................................................. 21</p><p>Chapter 2: Alternating &amp; Direct Current Theory .............................................23</p><p> Chapter Objectives ..................................................................................................................... 23 House Voltage ............................................................................................................................. 23 Frequency and AC Voltage vs. Frequency and DC Voltage ................................................ 24 AC/DC Voltage and Current: Ohms Law .............................................................................. 25 Kirchoffs Current Law .............................................................................................................. 26 Using the Digital Multimeter .................................................................................................. 26 Using the Oscilloscope .............................................................................................................. 29 Glossary ....................................................................................................................................... 30 Additional Suggested References ............................................................................................ 31 Chapter Review .......................................................................................................................... 33 Laboratory Safety Rules ............................................................................................................ 35 Laboratory Exericise .................................................................................................................. 37</p><p>Chapter 3: Basic Troubleshooting Methods ...................................................39</p><p> Chapter Objectives ..................................................................................................................... 39 Survey the Environment ........................................................................................................... 39 Understanding Failure Modes ................................................................................................. 41 The Half-Step Method ............................................................................................................... 42 Open Circuits .............................................................................................................................. 43 Circuit Loading........................................................................................................................... 43 Shorted Circuits .......................................................................................................................... 44 Glossary ....................................................................................................................................... 45</p><p>iii</p></li><li><p> Chapter Review .......................................................................................................................... 47 Laboratory Safety Rules ............................................................................................................ 49 Laboratory Exercise 3.1 ............................................................................................................. 51 Laboratory Exercise 3.2 ............................................................................................................. 53 Laboratory Exercise 3.3 ............................................................................................................. 55</p><p>Chapter 4: Reading Electronic Schematics ....................................................57</p><p> Chapter Objectives ..................................................................................................................... 57 How to Read Electronic Schematics ........................................................................................ 57 Understanding Electronic Symbols ......................................................................................... 58 Understanding Resistor Values ................................................................................................ 58 Reference Ground .................................................................................................................. 59 Troubleshooting Techniques with Electronic Schematics .................................................... 60 Glossary ....................................................................................................................................... 61 Chapter Review .......................................................................................................................... 63 Laboratory Exercise ................................................................................................................... 67</p><p>Chapter 5: Introduction to Power Supply Components .................................71</p><p> Chapter Objectives ..................................................................................................................... 71 Power Supply Block Diagram .................................................................................................. 71 Transformers ............................................................................................................................... 72 Filtering ....................................................................................................................................... 75 Semiconductor Devices ............................................................................................................. 78 Diodes .......................................................................................................................................... 79 AC to DC Rectification .............................................................................................................. 79 Bipolar and Field Effect Transistors ........................................................................................ 80 Metal Oxide Semiconductor Field Effect Transistors ............................................................ 83 Amplifier Classification and Push-Pull Transistor Arrangments ....................................... 85 Glossary ....................................................................................................................................... 88 Chapter Review .......................................................................................................................... 91 Laboratory Exercise ................................................................................................................... 93</p><p>Chapter 6: Operational Amplifiers ...................................................................97</p><p> Chapter Objectives ..................................................................................................................... 97 Op-Amps and Packaging Diagrams ........................................................................................ 97 Theory of Operation .................................................................................................................. 99 Inverting and Noninverting Applications ............................................................................ 100 Input Mode Applications ........................................................................................................ 103 Oscillators .................................................................................................................................. 112 Op-Amp Troubleshooting Flow Chart .................................................................................. 114 Glossary ..................................................................................................................................... 114 Chapter Review ........................................................................................................................ 117 Laboratory Exercise 6.1 ........................................................................................................... 119 Laboratory Exercise 6.2 ........................................................................................................... 123</p><p>iv</p></li><li><p>Chapter 7: Introduction to Power Supplies ...................................................127</p><p> Chapter Objectives ................................................................................................................... 127 Introduction to DC Voltage Regulation ................................................................................ 127 The Transistor Shunt Voltage Regulator ............................................................................... 130 Linear Integrated Circuit Voltage Regulators ...................................................................... 131 Switching Power Supplies ...................................................................................................... 132 Glossary ..................................................................................................................................... 134 Chapter Review ........................................................................................................................ 137 Laboratory Exercise ................................................................................................................. 139</p><p>Chapter 8: Troubleshooting Power Supply Problems .................................141 Chapter Objectives ................................................................................................................... 141 Power Supply Block Diagram Review .................................................................................. 141 Glossary ..................................................................................................................................... 147 Chapter Review ........................................................................................................................ 149 Laboratory Exercise ................................................................................................................. 151 Lab Review Questions ............................................................................................................. 159</p><p>Chapter 9: Troubleshooting Electronic Motors ............................................161</p><p> Chapter Objectives ................................................................................................................... 161 Introduction to Electromagnetic Principles ......................................................................... 161 Introduction to DC Motors ..................................................................................................... 165 Introduction to AC Motors ..................................................................................................... 166 Single-Phase AC Motors ......................................................................................................... 167 Failure Modes and Repair of Electric Motors ...................................................................... 169 Glossary ...............................................................................................................................</p></li></ul>

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