The board is not potted.Other than caps and resistors the other parts
are proprietary.When I called the manufacturer of the SCR's they told me
the numbers on them came from the board maker.The board maker will not
give up the information.Will add a jack to run it from an external
controller if it gives trouble again.Been using the lathe for 2 years
and this is the first trouble with it.Best $299 I ever spent on a tool.