Question about Kenwood KAC-729S Car Audio Amplifier

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HOW TO FIX A BLOWN CHANNEL?

Every time i hook my amp up it keeps blowing my fuses. It only happens when I hook the power wire up. I know its a blown channel so if there's any one that can help please do so thank you.

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The power supply appears fried and possibly one or more of your output channels. Unless you are good at repairing this sort of thing then I would suggest you save your self a lot of hair getting pulled out in frustation and go to a repair guy and let him pull his hair out instead. Good luck.

Posted on Apr 22, 2008

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1 Answer

I'm running 8 gauge wire for battery cable and ground cable....my amp.is a momentum 600 watt...2 channel. ....my fuse is blowing every time I hook up either cable...


First of all, what size fuse? Check the amp and see what max amperage is, and insure your fuse is that size. Secondly, I suspect either a blown speaker or blown outputs. Disconnect the speakers from the amp and see if the fuse still blows. If it does, either you are hooking two wires up improperly, or your outputs are toast.

Aug 06, 2016 | Car Audio & Video

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Wy fuse keeps blowing


Fuses blown when an overload occurs. More often than not caused by a short circuited transistor in the main amp section. Possibly also on the power supply too.

May 22, 2014 | AMC Multimedia CVT-2030 2-Channel...

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I have a visonik 800watt amp and i got it from a friend for free and i hooked it up right and as soon as i turned it on the 2 fuses blew then i replaced them and tryed it again and it stoped again so i...


Its the amp, do not put any more fuses in it
you need to get it checked out by a technician.

Its probably a power supply fault or blown output devices.

Hope this helps
Thanks for using FixYa

Aug 02, 2010 | Visonik V2508 2-Channel Amplifier

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How do you fix a blown fuse circuit in a lt1440 power acoustik amp


Just replace the blown fuse with one of the same amp rating... If the fuse keeps blowing you'll wanna recheck your wiring and make sure you don't have a short somewhere.

Sep 20, 2009 | Power Acoustik LT-1440/2 Car Audio...

1 Answer

Subwoofer buldging out problem


When speakers are wired in the wrong way the will do the "pushing out" you're describing. Basically the polarities have been reversed and if kept like this over a period of time will blow the speaker. Best thing to do is to disconnect the power by the negative on the amp and take out the fuse from the power supply. Check the wires running from the amp to the subs, negative to negative and positive to positive. I know it sounds basic but many people do mix it up! I would also check to see what channels the subs have been wired into?

Best way is to have one sub from channel 1 and the other sub from channel 2 for example. Or if its a bridged 4 channel amp, have 1 sub running from channel 1&2, and the second sub running from channel 3&4 still making sure of the polarities. Again this all depending what kind of amp and sub you have.

-----------------------------
For example;
A 4 channel (bridged) 1000W amp. 250W max per channel or 500W per 2 channels! So if you have 2 500W subs, by connecting one to a single channel will decrease subs ability due to the lack of power supplied. However by combining 2 channels you optimize the output!
---------------------------

Once you know all your wiring from your amp to subs are ok/good connections/good wires etc you shouldnt have to "wiggle the wires" to get it to work as this is just a bad connection. Also ensure that no 2 wires are touching. Make sure that the master volume on the amp is turned down. You dont need this to be on loud at all, in fact far from it or you'll risk damaging both the amp and subs!

Hope this helps!

May 27, 2009 | Car Audio & Video

2 Answers

Power wire keep blowing fuses


you need to go tho a block fuse which will be able to handle more load but will still give way before the amp its self would get fried i recommend a 75 fuse or higher

Feb 21, 2009 | Orion HCCA 275G4 Car Audio Amplifier

1 Answer

Fuse blown to right turn signal when hooking up utility trailer


fuse is underhood in power dist box.
if you only blow when hooked to trailer it is a problem with trailer wiring or light

Aug 22, 2008 | 2004 Chevrolet S-10

1 Answer

Ht-r500 onkyo


When a receiver does this, it is know as the "protect mode". This keeps the receiver from causing more damage to the components in it, by shutting it off when it detects an abnormal amount of voltage or current.

If you had to replace the fuses, it is most likely that you have a blown channel in the receiver.

You put 8 amp fuses in, so I hope that the fuses that blew were 8 amps as well. If you put fuses in that are higher rated in amps than the ones that blew, you will most likely cause more damage to the unit than need be. If the fuses keep blowing, please stop putting new fuses in again until the unit is repaired. Every time a fuse blows, it is because of too much current is going thru the unit. Having too much current is a very bad thing for electronics, it causes components to short out and sometimes even catch fire if the fuse is higher rated than it is supposed to be.

To find out just what parts will need to be replaced, you need a multimeter and then you will need soldering tools to remove the bad parts and put the new ones in.

When an amplifier channel gets blown, there are normally around 5 to 10 parts that will need to be replaced. If you do not replace every single bad part in the channel that has blown, you will most times blow up all the new parts that you just put in.

If you have no experience with electronics, you really should take it in to a service center for repair. If you are willing to try it yourself, let me know and I will guide you thru the troubleshooting steps to help you identify all the faulty components.

Onkyo is very well made equipment and is worth getting fixed.

A blown channel can normally be repaired for around $100 to $150, just depending on the shops rates and the extent of the damage.

Let me know if you need more help.

Dave

Jul 26, 2008 | Onkyo HTR500 Receiver

2 Answers

Smoking


Gee I would think that it is kind of obvious; your amp is blown. Just because it doesn't blow fuses doesn't mean much. If you hook the power up to the ground input and the ground to the power and then turn it on you pretty much toasted the amplifier. If you don't know why the amp is smoking, but you're trying to fix it yourself, you are basically telling me that you have no business doing so. I have been an installer for 15 years and even I am not dumb enough to try to fix a bad amplifier. Do everyone a REALLY big favor; stop messing around with something that you don't understand of have knowledge about before you hurt yourself.

Mar 16, 2008 | Legacy LA838 Car Audio Amplifier

1 Answer

Lanzar amp


If it keeps blowing fuses then #1 its internally damaged or "blown" .. Or #2 i would make sure you have the battery power hooked up to the + terminal and the ground wire running from the car body to the - terminal.. so if its hooked up correctly and keeps blowing fuses then it requires repair.. I wish i had better news but thats all it can be...

Aug 20, 2007 | Scosche Industries Scosche High...

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