Small valve mixing console

[ruffrecords]

Well, the chassis sits at ground (safety ground connected in the power supply/0V/signal ground) in my case, that's why I use these terms interchangeably.

Which is the root cause of the well documented "pin 1" problem. They serve different purposes and the way and where they are connected together is very important. This is not reflected in your schematic.

Cheers

Ian

 

[MidnightArrakis]

Which is the root cause of the well documented "pin 1" problem. They serve different purposes and the way and where they are connected together is very important. This is not reflected in your schematic.

[This is not reflected in your schematic] -- It may be helpful to the OP if you provided either a hand-sketch or a KiCAD-sketch of how things are supposed to be so he can more easily "see" and understand the concept you are attempting to convey. That way, he can then update his schematic and finally have his schematic "grounding scheme" drawn and implemented correctly. How about it?

Otherwise, he just might get caught up in a "Ground Loop" of constant schematic changes and updates!!! (Low-level humor intended).

/