I have this jukebox amp to repair, and the failure is there is no volume control, it is stuck on full volume, I have one channel in the schematic posted, the other part is below and identical. I don't understand how the circuit works, the 10k pot is pictured in red, only 2 terminals are used.
I believe Z5 has failed, because it is the closest to the outside world, and static may have killed it. Z3 appears to be in the signal path.
as a test the pot is removed and there should be no volume, and if the pot is shorted it supposed to be full volume.
I believe Z5 has failed, because it is the closest to the outside world, and static may have killed it. Z3 appears to be in the signal path.
as a test the pot is removed and there should be no volume, and if the pot is shorted it supposed to be full volume.