hifi engine

pilot 230 - 500

pilot or pilotone...
a lot of guys like these, but manuals/literature seem to be sorta scarce.
i have one of each and can find nothing on either... a schematic would be my santa wish.
if anyone can help or point me in the right direction i sure would like it.
the 230, it looks as someone tried to do something(made a mess is what happened)
cold solder joints, longlegged(looks replaced) caps, way too much wire, and a big cap that i wonder if it even belongs...
the 500, is in a 2b500 console, works pretty good... was wondering what upgrages should be looked at.
i hope all has a merry christmas,

finally found a map of the 500 pilot but still looking for the 230, still need help