In article
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sspence wrote:

I have a blown transistor (mosfet?) on my as-250 control board. No
real identifying markings that I can see. Anyone know what this is?

additionally, anyone have any good boards?

I think there are some parts vendors. I recall finding them when I was
looking, but I no longer recall where. I had problems with the speed
control pot burning out, so I replaced it with a wirewound pot, which
worked for a while, then it too died. The circuit diagram provided with
the unit is useless, neither matching the board (just count the devices
on the board and in the schematic - no match) and impossible (the
schematic is nonsense).

I'm replacing the Asong with Servo's made-in-Taiwan power feed.

Joe Gwinn