leray1
Active Member
The phono board has two types of transistors, one set compared to the other is in some weird mirror wise config that makes it easy to pin out wrong - if the replacement tranny's pin out are different too.....so double and triple check those.
Test again with covers on and after thorough inspection of phono board pinouts.
I checked the transistors and they are correct. Then I placed the cover to those boards on and the hum went away! Yay!
The foam that was under that cover was crumbling. Replace? If so, with what?
What about the click/pop/thump sound when switching inputs? Is it worth trying deoxit on that switch? Anything to worry about?