I have an Athearn power supply that hit the floor yesterday.
It seems the Potentiometer (I think that is what you call it) was damaged. It no longer works to control the power. It is just always on.
I put a meter on it and it showed as bad. I took it apart and could see no damage. It seemed like a simple device. I made sure the small wire brushes were touching the board and put it back together, but that did not help either.
I also tried putting a potentiometer on that I had laying around and of course it smoked, like I thought it would since this is D.C..
What makes the one in the power supply so special that it does not smoke and where can you get replacements?
I realized that these are cheap power supplies, but I am curious.
Thanks Chris