Question about Kenwood KAC-7202 Car Audio Amplifier

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Amp Trouble I bought a Kenwood KAC-9152D amp and beeing that i dont use my car much, I dont use the amp much. One day I turned it on and all the amp would do was turn on and off, on and off continusly. I know this because the red power light flashes on and off. The sub gets a surge of some sort when the amp flashes on but relieses when the amp is off. I took the amp apart and visually inspected it. It looked ok but I dont know what I should be looking for.

Posted by Zak Garrett on

  • Zak Garrett Mar 09, 2007

    This amp has been tested with another head unit and still have the same response. Also, other amps work just fine. Vut i will test everything as you sugested.
    thanks

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1 Answer

Brian Neathery

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Actually, it's more likely that the problem is on the outside of the amplifier than the inside. Your problem may be caused by a ground wire that's come loose from the grounding point, a defective fuse or corroded connection on the power wire, an overload of the remote input wire, or a problem with the head unit that your amp is connected to. The easiest way to troubleshoot is with a voltmeter. Test the voltage at the amplifier's main power terminal and remote terminal while the meter's black probe is connected to the ground terminal. If you find voltage dropping on one of the terminals, you can focus your attention on that wire.

Posted on Mar 09, 2007

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There could be several problems. The following page should help you determine if you have a problem with the amp or something connected to the amp.

Amplifier in Protection Mode - Troubleshooting

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0f1cebe.jpg

As for the amp shutting off for a few seconds, it sounds like it's either:
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The cap on the +12V to the amp should help, but putting a meter on the +12V might tell you whether it's dropping too low (<11V).

When you first turn the volume up, how long does it work fine before shutting off? Is it with the vehicle running or not?
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I'm not sure of the history or symptoms of your amp, but those are the reasons why the amp could go into protection mode.
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