kevzep
Its all about the Music
You do not need to remove TR09 and TR10 to measure them, and you do not need to test any other transistors on the F3074 board.Im guessing I got lucky. I tested the 4 power transistors on board F-3114, and now I am in the process of desoldering each transistor on the drive amp board F-3074, testing, then resoldering. So far I am at transistor 5, they all have been good so far. Should I continue with all 13 on this board? Are you convinced that something broke when that arch happened?
You got lucky, you just shorted the DC power rail momentarily.
Where were we at before the "accident" happened?
Have you checked all the fuses?