A study guide for working and aspiring electronics technicians who are preparing for their CET exams, this book provides a comprehensive review of all the topics on the test, including theory and practical workbench techniques for servicing TVs, radios, VCRs, stereos, computers and other electronics equipment. As the former Director of CET testing for ISCET, Sam Wilson has actually written many of the official CET tests. This book, completely updated, includes recent information on digital electronics technology, and attempts to help readers identify gaps in their knowledge of electronics. In addition to the two complete exams for associate and journeyman-level certification each chapter includes review questions, practice tests, and advice on how to avoid mistakes.