Hello, good evening friends, I am here, again with another topic. Now with an AQ Audio brand amplifier model AQ2200, the problem here is that the source fets flew and as a starting repair the fets (irfp064n) and impulse transistors were replaced, as well as gate resistors, in the end the signals were checked and everything is perfect, 1 Irfp064n is placed for each bank and everything works perfectly.... but however, when I proceed to place all the missing fets in the source, the current consumption increases drastically, I have already done tests for damaged fets, all They are from the same batch and are original, I cannot find the reason for the high consumption and heating of the irfp064n, I thank you and thank you very much for your support, tomorrow I will upload photos of the board.
Initially I felt that the Q11 and Q13 fets heated up just a little faster and after about 3 seconds they all heated up equally. I have limited the source to 2.5 amps and with a bulb in series in B+ it turns on, I'm going to do the test with the capacitor. In the output stage I manage to have audio without problems
