So now I have 2 JL amps in my shop, and HD750/1 and an M600/6. Both have a microprocessor.
Both have same symptoms - PS operates, switching present on the output FETS, no response on the power LED, no audio.
It seems the microprocessor is not allowing the amp to pass signal thru the preamp? Anybody have any info on how to troubleshoot?
Both have same symptoms - PS operates, switching present on the output FETS, no response on the power LED, no audio.
It seems the microprocessor is not allowing the amp to pass signal thru the preamp? Anybody have any info on how to troubleshoot?
Have you followed the signal to a device (jfet, analog switch...) that's controlled by the microprocessor?