Chapter 12

Presto Change-O: Circuit Boards and Replacing Components

Once you’ve found a component you want to test, or one that’s obviously blown, you need to remove it from the board. Back when all components were mounted on leads pushed through holes in single- or double-sided circuit boards, removal was easy. A little solder wick or a pump of the solder sucker, and the holes would clear. After that, all you had to do was pull.

Sometimes the process is still like that, but now there’s much more variety of component styles requiring different removal techniques, and multilayer boards have complicated the situation. Component removal ranges from trivial to maddening, and it’s easy to destroy the circuit board when a recalcitrant part simply refuses ...

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