purposely brought broken amp quick troubleshoot!

[earth_bender]

brought a plantaudio 5000.1d ad said proctection light was on, received it plugged it up to test first, from power supply heard a small wine, from sub and them seen smoke power wire hot and melted fuse holder want to seek the gods on quick troubleshoot what's going on inside

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[LosIsATool 5,000+ posts]

You bought a crappy paper weight

 

[earth_bender]

i know that! what do you thin it is, is the question this amp is actually good if you treat her right!

 

[keep_hope_alive Premium Member]

Basic Amplifier Repair

start by testing the output MOSFETs to determine which have failed (failed output MOSFETs are direct shorts)

 

[earth_bender]

2 capacitors are definitely getting hot and two small diodes next to the capicitors nothing else, seems like a easy fix i paid 30.00 bucks

 

[bubbagumper6 5,000+ posts]

Seems like an easy fix? To me it seems like you have no idea what you're getting yourself into. Can you solder? Do you have electronic circuit knowledge and troubleshooting experience?

 

[adulbrich 5,000+ posts]

^this

If you don't know what you're doing, it will not be an easy fix..

 

[earth_bender]

no! but that's why i brought it to learn, soldering not hard! i want to get myself into this that;s the purpose of the purchase

 

[bubbagumper6 5,000+ posts]

no! but that's why i brought it to learn, soldering not hard! i want to get myself into this that;s the purpose of the purchase

That's like saying you bought a wrecked ferrari to get into body work...start small man, you're biting off way more than you can chew.

 

[big scott]

^^^^^^^^^^^^^^^ now thats a good one. and your 100% right.

 

[earth_bender]

what's starting small, it's a cheap amp, what's the worst can happen i initially asked a question what do you think it is. amp powers on had a signal to sub but power wire got hot and melterd fuse holder. I opened it, powered it up looked around no smoke yet! if i leave it on it will eventually smoke from the power wire and there is a sound traced it to 2 capacitors 2200uf 25v, that what this forum is for doesn't matter what i know that why i ask you guys point me in a direction, i don't need to hear the extra road noise help me with your wisdom, as if you ran into this problem with this amp it powers got signal small noise in the area where it gets hot but it plays

 

[bubbagumper6 5,000+ posts]

what's starting small, it's a cheap amp, what's the worst can happen i initially asked a question what do you think it is. amp powers on had a signal to sub but power wire got hot and melterd fuse holder. I opened it, powered it up looked around no smoke yet! if i leave it on it will eventually smoke from the power wire and there is a sound traced it to 2 capacitors 2200uf 25v, that what this forum is for doesn't matter what i know that why i ask you guys point me in a direction, i don't need to hear the extra road noise help me with your wisdom, as if you ran into this problem with this amp it powers got signal small noise in the area where it gets hot but it plays

Well first of all, there's maybe only 2-3 guys on the forum that would be able to help you (Keep Hope Alive being one of them) but I kind of doubt any of them are going to be able to (or be willing to) walk you through it as troubleshooting is a hands on task that requires intuitive reasoning and knowledge of the circuits. Starting small would be repairing some small less complex circuits and studying basic amplifier circuit theory. It's very rarely as simple as just replacing a few capacitors.

If there's no way we can talk you out of it then I would suggest picking up Perry Babin's amplifier repair tutorial (LINK) but just know going in that it's very likely you're just going to waste a lot of time and energy to come to the same conclusion we're telling you right now.

 

[The_Quiet_One 10+ year member]

Start small by building your own circuits. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Specialize in amplifier circuits. Once you fully understand the function of everything on the board you will be more able to fix the amp, until then you're shooting blanks with no prior EE/circuit knowledge.

 

[Spooney 10+ year member]

The caps are not your issue. They are a symptom of a bigger problem. More than likely the output section has failed. If the output mosfets have shorted the amp will begin to draw excessive current. When this happens the power supply gets over worked and more often than not fails too. In your case it sounds like the power supply may still be functional to some degree but is pulling more continuous current than it was designed for due to the failure in the output section. Thats why you have melted wires and whining components. I wouldn't power the amp up again until you can find the cause of the issue. Start with the output mosfets and check for shorts but be careful. Many amps on the market can store enough power in their rail caps to kill you under the right circumstances. Not something you want to mess around with if you are unsure or just trying to learn. A smaller cheap two channel amp is a much better bet for your first repair/ learning experience