Repairing a power supply and output section of this amplifier. I just finished one that is of similar make. So following the same steps. I worked on this one. So the power supply went fine. Up and running had a shorted rectifier. (Should I replace them all?) Ok so output section the I did not replace the driver chips . Just the outputs with a test set of tested irf640. The amp powered up and all looked fine. When I attempted to add input, a 50hrtz 3v signal it blew two outputs in half. The same two that were shorted? Voltage regulator all have 5v. Would a bad op amp cause this?
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