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How to repair amplifier when dont on

No turn on

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Make sure you have 12V power, good ground return and 12V on the remote(yellow?) wire. If all those are good then check the fuse if bad replace. If it opens again you have something hooked up wrong or you likely have a shorted semiconductor inside the amp. Need a lot more info to troubleshoot a problem like that. Good luck!

Posted on Apr 20, 2014

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Posted on Jan 02, 2017

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My amp jl audio 500/1 i connect it and the green light turn on then i turn in the sterio and it sounds but when i turn off the sterio and when i wanna turn it on again the amp dont turn on i dont know why


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Blown amp, on circuit board, connecting fuse and power connect.


These amplifiers dont employ reverse polarity protection that most higher priced ones do.
The amplifier(s) are definately in need of repair - probably power supply - IF boss sells parts.
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It sounds like it may be oscillating. This can be caused by a broken ground in the signal line. You need to check the RCA shield on the head unit.You'll need an ohm meter. The following page has more details. If the head unit isn't damaged, the shield ground could be open in the amplifier.

Temporary Shield Repair

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1 Answer

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It sounds like the output transistors have failed. Disconnect everything from the amp except for the B+, ground and remote and turn the amp on. If it goes into protect, the amp is in need of repair. If you want to repair it yourself, email power acoustic for the schematic.

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