Reply to "Reverse board won't go forward, bad transistor or some thing else?"

stan2004OGR Forum Member

So to be clear, with no motor connected, using Diode mode you measure each NPN between pins 2-3 (and then 3-2 backwards) and in each case you measure 0.0V (like when you touch the test leads together).

You do the same for the PNPs and in each case (pins 2-3 and 3-2) you measure "OL" or whatever the Fluke says when the test leads are not touching anything.

And if you measure, say, that diode on top of your pic of the burned K-line board you measure 0.7V (or so) in one direction and "OL" in the other direction.

Let the games begin!

1/4/122:51 AM

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