Question about Legacy Audio American Legacy II LA490 Car Audio Amplifier

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600w legacy amp

Its a 600 watt series 2 and everything is hooked up right but the protect light is on.and it wont work

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9 times out of 10 if your amplifire is in protect mode and evrything externaly, like speakers, fuse, voltage, etc. checks out fine then
either you have shorted out output transistors or power mosfet transistors. Basicly that just about what happens with car amps.
It's easy enough to fix IF, IF you know what your doing. First you
need to check the output transistors with a digital volt meter on diode check, If they check out then check your power supply mosfet transistors. I can almost guarantee this is your problem. Very common. I buy non working amps all the time and repair them. Listen to pbabin also he has helped me out. Good luck

Posted on Feb 12, 2009

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If the amp is in protect mode, it probably has shorted output transistors. To eliminate other possible problems, read through the following troubleshooting tutorial.

Amp in protect mode - troubleshooting

Let me know if you have any other questions.

Posted on Sep 08, 2008

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