So amp had a power supply blowout, removed blown FETs, confirmed I had drive, replaced FETs and amp cycles between low current quickly climbing to constant current mode on PSU, removed rectifier and again have clean switching to rectifier pads, then I find a small piece of metal between legs 9&10 on U502 (LM391M) can’t believe I missed that :/ so I reinstall rectifier and remove output FETs (which all test good) and current is still climbing fast maxing out PSU (I have limited to 3.5a) to CC mode. No waves of any kind on the U500 (4427) U501 (2068) U502 (319)
Any insight greatly appreciated, not the best with JL Slash amps but getting better 🙂 hoping the JL guru sets me in the right direction 🙏🏻
Any insight greatly appreciated, not the best with JL Slash amps but getting better 🙂 hoping the JL guru sets me in the right direction 🙏🏻
Attachments
I’ve tried up to a 9a and still the same problem, I got multiple 1000/1’s to boot up on 7.5a limited with this same PSU, I’ve actually never had a problem booting any amp up with this PSU all the way up to an 8k so far, but I can try 14v/10a and see if that helps. But even if ot doesn’t like limited that wouldn’t make it max out the current draw would it? Never seen that before.
It goes from .030>2.5>CC mode, worth a **** replacing U500/U501/U502? Is there something I can pull before Output FETs to go back through the circuit trying to find the problem? A blown IC wouldn’t make it do that would it? Just a weird one 😅
It goes from .030>2.5>CC mode, worth a **** replacing U500/U501/U502? Is there something I can pull before Output FETs to go back through the circuit trying to find the problem? A blown IC wouldn’t make it do that would it? Just a weird one 😅
