Testing Power Supplies with a Multimeter
How can you find out that a defective power supply is really defective? How can you make sure that a cable has the right pinouts? Use a multimeter. A multimeter is one of the most flexible diagnostic tools around. It is covered in this chapter because of its usefulness in testing power supplies, but it also can be used to test coaxial, serial, and parallel cables, as well as fuses, resistors, and batteries (see Table 5.1).
Multimeters are designed to perform many different types of electrical tests, including
DC voltage and polarity
AC voltage and polarity
Resistance (Ohms)
Diodes
Continuity
Amperage
All multimeters are equipped with red and black test leads. When used for voltage tests, the red is attached ...
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