This one has a stumping problem. Got it with outputs and emitter resistors blown in one channel. Replaced all IRF540 with IRF3710Z. Found Q21 junction open as well.
Amp was able to power and play so put it back in the sync. Everything went well with testing each channel individually but not bridged.
As soon as I bridged the amp at 4-ohm load and started to bring up the input signal, the amp pulled hard and popped all 3x30A fuses.
Broke back down, and found some of the new IRF3710Z outputs shorted. Also one of the PS Fets shorted. Q21, Q34, D42, D43, D44 and D45 at least have failed.
Is there a schematic available for this amp?
Why would it pop when bridged, but pull just fine with only 1 channel at a time?
Amp was able to power and play so put it back in the sync. Everything went well with testing each channel individually but not bridged.
As soon as I bridged the amp at 4-ohm load and started to bring up the input signal, the amp pulled hard and popped all 3x30A fuses.
Broke back down, and found some of the new IRF3710Z outputs shorted. Also one of the PS Fets shorted. Q21, Q34, D42, D43, D44 and D45 at least have failed.
Is there a schematic available for this amp?
Why would it pop when bridged, but pull just fine with only 1 channel at a time?
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Did you test the channels individually at 2 ohms?
I don't think the 3710Z is a good match for a non-switching amp. The IRF3415 should be OK.
See attached. It's the closest that I have.
I don't think the 3710Z is a good match for a non-switching amp. The IRF3415 should be OK.
See attached. It's the closest that I have.