Quad 33 and FM3

[ppppenguin]

The only things I disconnected were the L and N to the mains transformer. The only relevant feeds from the PSU are 0V and +12V. the 12V is spot on and it wouldn't work at all with if one of those was missing. I also unplugged the PCBs but I've reseated those to no good effect. When I next get it on the bench I'll put a meter on the pots and see if there's any DC. It just sounds and feels like DC on pots and switches even though this is logically impossible for all of them at once.

There might be some fractured wire I haven't found possibly part of 0V continuity.