Page 82 - Testing Electronic Components

full operating voltage even though both windings checks okay with ringer
test.

Conclusion- The first method (voltage testing) is the best choice to test
linear transformer accurately, but first you must know how
transformer work and get an experienced technician’s friend to help
you out before performing the test on your own. For some
transformers like the UPS (uninterruptible power supply) you need wiring
diagrams to assist you because there are so many secondary windings and
you may get confused. Lastly, checking switch mode power transformer
is different from testing linear transformer. I will cover on how to test a
switch mode transformer in next chapter.

A Switch Mode Power Transformer

82