Question about Sony Xplod XM-554ZR Car Audio Amplifier

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Sony explod 800W amp

Hi
I went to use my car stereo and found out that there was no power to the amp. So I looked at the fuse between the car battery and the amp,, yes it was blown. I replaced with a new fuse(30 amp) and now the light that is normally green on the amp is RED. I checked the two 30amp fuses on the amp itself and there fine. I checked the ground wire and cleaned it up, its fine. So what I think I need to do is RESET the amp,, and I don't no how, does anyone now how to reset the 800w sony explod amp?? It has power because the light is red,, all fuses are fine.....I'm stumped. Thanks for the assistance.
-Shawn

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

With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.

If the voltage remains near or above 12v, disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down, the amp almost certainly has shorted output transistors and will need to be repaired.

Posted on Jun 08, 2008

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