Book excerpt: The Microcomputer/Audio-Visual Repair Supervisor Passbook(R) prepares you for your test by allowing you to take practice exams in the subjects you need to study. It provides hundreds of questions and answers in the areas that will likely be covered on your upcoming exam, including but not limited to: basic electronics, including circuitry, schematics and wiring diagrams; use of electronic test equipment; repair, maintenance and operating characteristics of electronic equipment; maintenance and repair of microcomputers and related equipment; operation and maintenance of sound motion picture projectors, tape recorders and other audio-visual equipment; and more.