Quote from: Roly on November 18, 2013, 12:45:23 PMHi,Quote from: usernameI've just replaced the burnt R8 resistor and the C12 cap which act as feedback oscillation or so...
That's a bad sign; that's the safety ground lift resistor (to prevent ground loops) and its bypass cap. It suggests that the amp got a mouthful of mains current between its signal ground and mains ground (or got hit by lightning).
In any case, because it concerns a possible earth fault, most likely in some other gear that was connected to it at some stage, it's pretty important we try and track back when, what, and how this happened.
I guess they already were burnt as I bought the poweramp (bought it used)...
...but as I said I replaced them... shouldn't be a problem yet? or do you think that anything else might be defect too?
thanks for all the info, again
cheers,
max