kevzep
Its all about the Music
I'm pretty sure he replaced those John, at least I think that's what he did....We all told him about those at the beginning of the thread......I think those modules have been out.Looks like you haven't worked on the Driver modules yet - failure to be able to set bias (or DC offset) is very likely to be 2 x 390 Ohm resistors per driver that are probably fusibles - because they seem to take a beating and go near enough open - mine were up in the ~200K area.
These are R36 & R37 (near TR13 & TR14).