This is a problem with self oscillating amps. If they don't oscillate, about all you can do is to check all of the power supply voltages and the individual components. For amps like the Rockford BD amps that use an integrator and comparators to produce the drive signal, you can methodically go through the circuit to find the faults.
Go back and check every component possible. This includes all of the resistors, transistors and diodes on the driver board.
Go back and check every component possible. This includes all of the resistors, transistors and diodes on the driver board.
Crunch P3000.1D relay not engaging
Got a Crunch P3000.1D here that powers up and has +/-54v of rail, but the output relay is not engaging and there is - 54v on the speaker + output trace going to the relay coming from the outputs.
If I remove the 2 IRFP250 outputs connected to the negative rail, the voltage on the speaker trace goes away. The outputs are not defective as replacements do the same thing. I am not sure how to troubleshoot the driver board in this amp, nor the relay engagement circuit. Any advice would be appreciated. Pics of the complete board and the audio driver board are attached. Thanks.
Got a Crunch P3000.1D here that powers up and has +/-54v of rail, but the output relay is not engaging and there is - 54v on the speaker + output trace going to the relay coming from the outputs.
If I remove the 2 IRFP250 outputs connected to the negative rail, the voltage on the speaker trace goes away. The outputs are not defective as replacements do the same thing. I am not sure how to troubleshoot the driver board in this amp, nor the relay engagement circuit. Any advice would be appreciated. Pics of the complete board and the audio driver board are attached. Thanks.
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