Page 73 - Testing Electronic Components

Testing Zener Diode

Method of testing zener diode is totally different from testing diode. You
need an analogue meter to do the job. Before you start to test any zener
diode, you must first understand the marking or part number and then
look for the voltage ratings. Once you know the zener diode voltage from
your favourite data book such as the Philip ECG semiconductor master
replacement guide then it is easy to check with your meter to see if it
leak, open or shorted.

A wrong part number installed may cause your equipment to malfunction
and behave strangely. Precious time and money were loss due to that we
lack of knowledge in zener diode spec identification. If you can’t find out
what is the code or part number mean then it is very difficult to repair the
equipment. Do not worry as this book here is to guide you to successfully
on how to read the zener diode marking.

2.4=2.4 Volt zener diode
2V4=2.4 Volt

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