Need to get a Baldor F391 board scematic diagram.

I have a Denford Microrouter V3 which has packed in due to the above board going u/s. I have been looking for a schematic diagram for it so my technician can do some fault finding and hopefully repair it. Have emailed Baldor/ABB to request one and maybe they will come up trumps but who knows! As this is quite an old board, I don't know if they were specifically made by Baldor for Denford or if they were just a generic board that Denford chose to use. A replacement from Denford is £690 inc vat which is a bit eye-watering so any help would be much appreciated.

Thanks

Mike