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Protect light will not turn off!?

All connections are good to the amp and have been checked several times with a meter. The porect light won't turn off and just turn to green?

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Re: Protect light will not turn off!?

In most cases when the protect light is lit, the amplifier's output transistors have failed.

If the amplifier goes into protect with no speaker wires connected to it, it's likely in need of repair.

Posted on Nov 26, 2007

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No light on sony amp

Check your connections. Use a meter or a test light to make sure that the amp is getting power, ground and that the remote turn on is also switching on when the radio is on.

Jul 29, 2012 | Sony XMGTX1852 Car Amp

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How do i fix my Power Acoustik LT-980/2 car amp, it keeps on going into protect mode.

Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you have warranty . .A thumbs up would be greatly appreciated if this answer is helpful to you

Aug 10, 2011 | Power Acoustik LT-980/2 Car Audio...

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I have a kicker 500.2 red protection light is on and red light on top of amp flashes every couple seconds. Have checked all connections and other amp in truck works good. I bought two of these amps and...

Disconnect all the wires except the three main power wires, ground, 12v battery and remote. Now, turn on your radio, if the protect light is still on then there's an internal short in the amp. If the light turns green, then there's a short in either the auxiliary cables or the speaker outs. If it turns green, then troubleshoot the other wires that plug into the amp by connecting them one at a time until the protect light comes on, which will tell you that there's a problem with that speaker/aux wire.

Jul 25, 2011 | Kicker KX500.2 Car Audio Amplifier

1 Answer

Blue light on top flashing???not powering subwoofers.. was working fine.( blue light stayed on.) When I noticed it I shut the system down immediatley!!! Have'nt turned sytem back on since. What should I do...

You amp went into protect mode from an abnormal condition. Were you hammering on this amp when that started? I might suggest letting up on it a bit if so. Also check your wiring. Make sure all are insulated well and fully connected. It cut the noise off because if it would have continued it would have blown your amp. Make sure the fuse is good as well. Perhaps it is getting weak. Turn things down and turn the amp on. Give it a chance to cool for a bit first and then turn things down and turn it on. Everything a go? Then turn it up a bit then. My guess is it was getting worked a bit to hard and went into protect mode. Give the amp a rest from time to time. Good luck.

Mar 06, 2011 | Pioneer Car Amplifier GM-7100M - Mono Bass...

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The red protect light is coming on

It is possible that your amp is going over the threshold limit of draining current to give out the protect signal. What could be done is to first checkout if your speakers are loading the amplifier, check the rating of the speakers and the impedance, must not be too low.below 2 ohms. Now check the source signal if this is bringing in any transcient signals to power out the outputs particularily high/low freq. So decrease off your bass and treble to mid position and test again. see if there is any improvement, if so there could be a filter problem with your set. Connect an external source and see if the amp powers better , in such case check for fault in cables, input lines and ground with in the set. Repeat this and check. Hope this helps you out. Good day

Jul 19, 2010 | Verge VGA285 Car Audio Amplifier

1 Answer

Amp cycles on and off

Hello it sounds like the amp is going in & out of protection normally the protect light will pulse at the same time but is not always the case if you can get hold of a voltmeter set it to the 20v range & check to see if there is 12v present between the RCA (Phono socket) input & shield, if so then the switch mode power supply transformer is faulty. It could also be a number of problems elsewhere as well so really needs to be inspected by an experienced engineer.

Nov 13, 2009 | Car Amplifiers

2 Answers

600w legacy amp

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

Sep 08, 2008 | Legacy Audio American Legacy II LA490 Car...

2 Answers

MA Audio HK4000D please help me ?

Turn the system off and disconnect the speakers. Turn the system on. If the amp still goes into protection mode with no speakers connected, then most likely the output transistors are bad. If the protection light is off, hook up one sub at a time until you find the one that is causing the problem

May 21, 2008 | MA Audio HK4000D Car Audio Amplifier

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Sisnce you didn't mention the protection LED, I'll assume it's not on.

You need to measure the voltage across the B+ and ground terminals of the amplifier to confirm that the voltage at the terminals is least 11 volts. Also check the voltage on the remote turn-on terminal. Place the black meter lead on the ground terminal of the amp and set the meter to DC volts.

Nov 07, 2007 | Power Acoustik LT-980/2 Car Audio...

3 Answers

El1500 turns on but so sound

Hello fordguy, love the name i'm a ford man myself if thats why you chose it. Anyway to the amp. I buy broken amps all the time from E-bay and find which parts are bad order them and replace them and the amps work great. I just bought and recieved the same amp, Bazooka EL1500 and right away when I put power to it the protect light came on. Let me tell ya a little about car amps and the mostly the main reason they go into protect mode. First it could be something small and stupid like a fuse, sometimes amps protect light will still come on even if fuse is blown. Maybe something inside is touching something else causing it to go in to protect mode like lets say a small peice of solder is connecting to solder traces together or whatever, you get the idea. Second and this is I'd say 80% of all protect lights coming on. You either have shorted out output transistors or powersupply mosfets transistors. This is mainly the cause of this all the time. Sometimes though it's not and you have to do further testing. With your amp, I don't know what was going on at the time of when it quit. The capacitor you speak of is fine it's just the protective shrink looks melted cause thats how it was done when amp was made. You need to test all output transistors and power supply mosfets with a digital volt meter set on diode check. Let me know what you find and itf you need help just opost a comment asking for my e-mail and I will taake you thru the steps. If this helps, please rate it so I can get out of this apprentice status.

Feb 02, 2007 | Bazooka EL1500 Car Audio Amplifier

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