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Old 17th February 2010, 05:41 AM   #1
x2breid is offline x2breid  United States
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Default MTX 600XD question

I have a amp that is coming up in protection mode. I decided to open the amp up to see if I smelled that electrical burning smell and see if I could see any phsyical damage. The amp is not under warranty nor did I have to remove the warranty sticker any way. I had a few questions for those of you with a heck of alot more experience than I.

1. You will notice thes 2 blue things with this white gunk all around it. Is this bad? because it would seem that if that goo can transfer electricity there is going to be alot of bad things happening with all that crap on it.

2. One of what I call capciters looks to be a little larger than the other 3 and pokes up a bit. Could this be the issue? I am going to take it to a shop because I do not know what the hell I am doing. I am just wondering since I seen it.

Thanks
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Old 17th February 2010, 11:33 AM   #2
81bas is offline 81bas  Germany
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Location: Kiel
Quote:
Originally Posted by x2breid View Post
1. You will notice thes 2 blue things with this white gunk all around it. Is this bad? because it would seem that if that goo can transfer electricity there is going to be alot of bad things happening with all that crap on it.
the white gunk is usually a silicon glue, so hese 2 blue things (capacitors) do not broke away because of vibrations...

Quote:
Originally Posted by x2breid View Post
2. One of what I call capciters looks to be a little larger than the other 3 and pokes up a bit. Could this be the issue? I am going to take it to a shop because I do not know what the hell I am doing. I am just wondering since I seen it.
the capacitor 'pokes up' because of the enormous heat. The enormous heat can be produced by enormous pulsating voltage or by too high voltage. I think this amp got once a lot more than designed 12-14 volts (about 50-100 volts, I would say).

Seems, it will be needed to check all the PSU and amp mosfets, eventually replace some of them...
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Old 17th February 2010, 11:54 AM   #3
baga is offline baga  Romania
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Quote:
Originally Posted by 81bas View Post
I think this amp got once a lot more than designed 12-14 volts (about 50-100 volts, I would say).
I don't think so.If the amp got 50-100v,there must be more poked capacitors and many burned components.That capacitor poked because of heat,wear and ripple current or poor quality.It is a common problem for electrolytic caps in all electronic devices.It is possible that the capacitor isn't the reason for the amp to go into protection.
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