Trying to fix the issue with this Luxman amp.
Takes a while to get out of protection on start-up. When outputting more than about 1W, speaker makes popping sound, if left playing, makes one really loud pop and turns itself back to protection mode.
I took it open and got some pictures.
Seems like the amp had been repaired before. One of the amp board looks like it's been blown up before.
the main power transistors looks different on the power amps, is that a concern? The 2SA679 is swapped for 2SB655A and 2SC1079 is swapped to 2SD675A.
Any ideas what would be causing the issue?
Any help is appreciated.