Amp tech needs schematic for Pittbull 50/CL

My Pittbull 50/CL is currently with an amp tech and he is having difficulty getting a schematic. He says e-mailed a request and got no response. I know schematics are not shared with end users, so how can I get a schematic to him? Serial number of the amp is BA960017.

Fryette does not give out schematics, even to techs.

Do they have biasing instruction documentation? Anything?