Circuit Diagram for Raven Labs PMB-1

[jmlee]

I'm looking for the circuit diagram for the now-discontinued Raven Labs Professional Master Blender PMB-1. This is the lovely, small mixer made by Steve Rabe. I'm having problems with the Master Volume pot which is a surface-mounted panel pot, labelled Di Ya 0424. It's resistant to the usual cleaning methods. As well, it's immediate neighbour (a 50k pot) seems mechanically loose on disassembly of the top level control PCB as shown. I'll likely replace the two of them if I can, but would appreciate having the circuit diagram to help to ensure everything is good. Anybody got such a thing? Thanks!

 

[MikeVB]

Did you ever find a diagram or get the unit repaired?

I'm considering buying a one-owner one that had the gain increased 6 dbs by the builder. I'm a little paranoid about whether it would sound the same and could be unmodded back to original specs.