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Electronic test equipment is used to create signals and capture responses from electronic devices under test DUTs. In this way, the proper operation of the DUT can be proven or faults in the device can be traced. Use of electronic test equipment is essential to any serious work on electronics systems. Practical electronics engineering and assembly requires the use of many different kinds of electronic test equipment ranging from the very simple and inexpensive such as a test light consisting of just a light bulb and a test lead to extremely complex and sophisticated such as automatic test equipment ATE. ATE often includes many of these instruments in real and simulated forms. Generally, more advanced test gear is necessary when developing circuits and systems than is needed when doing production testing or when troubleshooting existing production units in the field. The following items are used for basic measurement of voltages, currents, and components in the circuit under test.
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Here are a few:. In a system with identical or parallel subsystems, swap components between those subsystems and see whether or not the problem moves with the swapped component. I was once able to troubleshoot an elusive problem with an automotive engine ignition system using this method: I happened to have a friend with an automobile sharing the exact same model of ignition system. We swapped parts between the engines distributor, spark plug wires, ignition coil—one at a time until the problem moved to the other vehicle. Normally, this type of problem could only be pinpointed using an ignition system analyzer or oscilloscope and a dynamometer to simulate loaded driving conditions.
Telephone: There is a generally recognised method of approaching fault-finding , which is referred to as the 5-Point FaultFinding approach Once you learn the symptoms of each it should become straightforward to resolve the issues you will encounter The Polarity referred to throughout this section is not the type of Polarity referred to in electronics, where if the positive and the negative points of a circuit are reversed damage could be caused to a component or a circuit board. Incorrect Polarity in fixed Electrical Installations could give risk to electric shock where a circuit is thought to be switched off, when in fact a live terminal remains within the fixture. The terminals in the under-section of a kWh meter are normally as follows: from left to right. Finally, look closely at Figure 3.
It isn't enough to be able to design.
It isn't enough to be able to design. It isn't even enough to be able to debug. To be a real fault finder, you must be able to get a feel for what is going on in the circuit you are examining. In this book Robin Pain explains the basic techniques needed to be fault finder.
Остается только заполнить. Беккер снова вздохнул, решительно подошел к двери и громко постучал. Пора переходить к решительным действиям. Немец рывком открыл дверь и собрался было закричать, но Беккер его опередил.
Что еще за второй ключ.
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