Fault diagnosis and testing
13.1 Introduction
Successful and efficient fault-finding is an art as well as a science, for experienced practitioners learn which faults are likely to occur and which are not, and use tests that isolate typical faults most quickly. It is also technically extremely exacting, as it requires an understanding not only of how the circuit is designed to operate, but also of how the circuit will behave under a multitude of fault conditions.
In fact, broadly similar approaches are needed to establish why a new design does not operate as expected, or why a newly constructed circuit made to a known good design does not operate the first time it is tested, or why a circuit that previously operated correctly has suddenly ...
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