Question about Power Acoustik Car Audio & Video

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I have a PA A3000DB when it turns on it goes straight into protect for a few seconds the comes out of it. when the gain is adjusted the slightest bit there is a really bad his/whistle out of the power supply fets and then a loud "pop". i have went through everything and it all test out good...IE:the fets, entire drive circuit, capacitors,everything checks out and reads good on the DMM...i am lost as to why this is going on....what should i check or do?

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This sounds like a cap breaking down to me, under a load. Ohming out caps doesn't stress them, and they can still read good. I would concentrate on the electrolytics, especially the larger ones, in the power supply, as you suspect. Depending on the age of the device, sometimes techs just go ahead and replace them all, just to ensure a solid, lasting fix, since caps are the only really time sensitive components.
Good luck, hope this helps, and thanks for using FixYa.

Posted on Sep 08, 2010

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Posted on Jan 02, 2017

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