Right Channel Hum

thoven0215 · 4535

0 Members and 1 Guest are viewing this topic.

Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
    • Posts: 19611
Reply #30 on: August 24, 2022, 07:01:23 AM
OK, in your previous post you mentioned IB, OB, and KReg being 0V.  This is on the larger C4S board, not the smaller one (it doesn't have a Kreg).

IB on the larger PC board wires into the high voltage power supply at 34U, and you need to do a DC voltage check of 34U.  If it's 0V that is significant.  If it's more like 380V and IB is 0V, then they are not connected.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man