6-
18
All bipolar junction transistors have essentially the same looking signatures.
Identifying Unknown Transistors
Sometimes, we need to identify unknown transistors. We may need to replace one in a circuit for
which we do not have a schematic. The Tracker 2700 makes this a relatively simple procedure
because each type of junction has a characteristic signature. This makes it possible to identify
each of the terminals and the polarity of the transistor.
Do the following:
1. Select the 15V, 10 kΩ
ΩΩ
Ω Range.
2. Set the frequency to 60 Hz.
Figure 6-25. Tracker 2700 with Probes to an Unmarked Transistor
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