• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Blown up Capacitor?

P

Perfectionist

New Member
Joined
May 26, 2013
Messages
9 (0.00/day)
Just bought a rmx 2 dj mixer, stuck the wrong power adapter in and it blew a capacitor (hopefully that is all), I know almost nothing about motherboards but I really want to fix it.
I opened up the mixer and the capacitor lid fell out, and there is stuff that looks like dead grass all over where it used to be.

What is it?

http://s1351.photobucket.com/user/Perfectionist3/media/IMG_0835_zps81a87c21.jpg.html?sort=3&o=3

If you know how I can fix this problem, I'd really really appreciate your time and help. Thanks :rockout:
 
You can try soldering a new capacitor of the same rating in place of the blown cap, if you don't trust your own soldering skills to do this you should be able to get a local PC/Electronics repair shop to do it for you.
 
There is no risk in trying to replace the capacitor, as it's broken anyway. It's not guaranteed to work, but worth a try.

Make sure you get a replacement with the same rating with a decent brand.
 
THanks for replying

Thanks for the quick reply guys, is the capacitor the only thing that is damaged when there is to high of a voltage from a power adapter?

For the capacitor, its a Samcon 16v 100uf. Where can I buy a decent cheap replacement? (a link would be cool)

Thanks :rockout:
 
Anything could be damaged by the over voltage. The cap is just the thing that failed catastrophically.

The only thing to know if anything else is damaged is to replace the cap and see if it works. If it doesn't then something else is damaged and you'll have to hunt it down.
 
Challenge accepted, I'll give it a shot. Watch some youtube tutorials and try it out.
I have a Samcon 16v 100uf capacitor, where can I buy a decent capacitor? (a link would be cool)

Thanks :rockout:
 
Generally the capacitors are the first to go.
How bad was the voltage??
Replace the cap and see if something else has gone down with it.
Good equipment should come with a fuse....
 
i forgot to mention, panasonic makes good caps.
Also the one you posted is very common. Easy to find. Very cheap.
You can use anything above 16v.

Btw, how much volts did you put in?
 
de.das.dude said:
Generally the capacitors are the first to go.
How bad was the voltage??
Replace the cap and see if something else has gone down with it.
Good equipment should come with a fuse....
Click to expand...

It was an accident, but the mixer says 7.5v-1A.
The wrong adapter I put in says
Input:120-127V~60Hz O.22A
Output: 30VDC 500mA

Infact, when I plugged it in. I did not even press the ON button. It automatically started on the OFF switch and 5 seconds later blew! with a little smoke.
 
ahhh. that explains it.

if you had gone to even 12 volts you probably wouldnt have damged things.
but 30V is wayyyyy to much.
 
de.das.dude said:
ahhh. that explains it.

if you had gone to even 12 volts you probably wouldnt have damged things.
but 30V is wayyyyy to much.
Click to expand...

I don't know if you looked at the picture I posted earlier, but the thing exploded on the inside like a firework. I am sad yet glad this happened cause now I will always check to make sure its the correct one...hopefully.
 
There is a chance it will not work even if you replace the Cap, but it's worth a try.
 
Perfectionist said:
I don't know if you looked at the picture I posted earlier, but the thing exploded on the inside like a firework. I am sad yet glad this happened cause now I will always check to make sure its the correct one...hopefully.
Click to expand...

i did, but the full res pic refuses to oepn. damn you photobucket.

that grassy stuff looks like lint/dirt.
 
de.das.dude said:
i did, but the full res pic refuses to oepn. damn you photobucket.

that grassy stuff looks like lint/dirt.
Click to expand...
The grassy stuff is the inside of the capacitor, I do not know what it is though. I think it a the absorbent sponge that holds the acid.
 
de.das.dude said:
i did, but the full res pic refuses to oepn. damn you photobucket.

that grassy stuff looks like lint/dirt.
Click to expand...

Looks like the cap to me. Look at how it is stuck to the components, only on the side facing the cap. That is a PROPERLY blown cap, not this sissy bulging thing. :laugh:
 
must have been a big explosion. lol.
 
Most probably a satisfying little pop.

The foam is the Dielectric material. I believe it acts as a very good electrical insulator between the plates of the cap.
 
I use thin rosin core most of the time. I think it's .7 or .8mm thick.
 
How good are you at soldering? Because those caps are set in plated holes, meaning the solder pads go through the PCB, and they can be a bit of a bitch. If unlucky (or not careful) you can mess up the solder pads.

Also remember to measure the cap. Just because the cap has the correct values does not mean it has the correct size.
 
paleted holes are the easiest to solder IMO
 
de.das.dude said:
paleted holes are the easiest to solder IMO
Click to expand...

Solder them can be pretty easy (unless the pins are too big for the hole), but desoldering can be tricky.
 
You must log in or register to reply here.
Back
Top