Hi y'all, I am looking for help on this Memphis, Q255 and Q256 are getting extremely hot. (IRF640). I have replaced the driver transistors on the driver board. If I leave the outputs out of the board, I don't get the high current draw, and have a good signal. By the way I have replaced the 4 9640's and 2 940's.
I have also replaced the gate resistors for all the fets.
I have also replaced the gate resistors for all the fets.
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Perry the picture I posted is of the originals ones. The ones I have in now are from same batch. I take pictures when I open them up for the first time and place in a folder for future references. I will replace the 640's with the 3120's. It does look as though this amp has been worked on before.
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