I am trying to repair an EMD "black box" type voltage regulator.* There are several burnt components on the circuit board.
We don't have any EMD locomotives, so I lack any books on this unit. It would help tremendously if I could get a schematic; or a parts list which indicates the spec of the components in each position. Would anyone have such a thing?
Thanks.

* this one is part number 8330790-3, but we also have one of the 8351980 types.