Contraves DC servo controller

[lynex5]

I am working on a CMC MG flame torch machine, with X master X slave and Y drives. Y drive is not responding.
Does anyone know where I can get a circuit diagram for a CRS Contraves DC servo controller Type NC121F, or a complete unit?
THanks

[gatorfb074]

I have been working on some and they have been nothing but problems. I got 4 of them for you all junk, free to a good home.