Hello people. I am looking for some information about this generic Chinese amplifier, in my country it is marketed under the APOGEE brand, model P-2000, it works in class G. There is a channel with -2.7V and it does not activate the relay, the other channel works perfectly . In the photos, you can see some pluggable modules, I already exchanged them, and the problem does not come from there, I removed all the power transistors, in good condition, I only put 2 new pieces, but the fault persists, I don't find any bad component, but it is difficult to reason without a diagram, fundamentally because of the issue of the modules, they are SMD, double-sided pcb, very, very complicated. Maybe someone in the forum knows her or has some information about this team. Thank you very much.
