Unknown capacitor

[tbone901988]

Hi guys I have a Gateway "gt4016" PC with a case of the capacitor sniffles.
I've located all of the "bad caps" ; ),and I am in the process of replacing them.
I have one problem though, I cant seem to identify the caps near the CPU (they are bad).They are small,silver;with no plastic sleeve and are NOT smd type.
On the top it says "62-480-4J. If you're looking down at it here's what it looks like:
62
480
4J
I haven't the slightest clue what this means,maybe 62 volts? 480 mf? 4J?
Any help appreciated.
-I'm sorry but I don't have a camera

[mariushm]

Re: Unknown capacitor

Are you sure it's 480 and not 680 ?

The most common conventions is to use either:

* value in uF ... so it would be 480 but that's not a standard value. 680 is more likely.

* value in uF with last number a multiplier ... ex 271 = 27uF * 10^1 = 270uF ... 480 in this case would mean 48uF which is too low.

I did a search for gateway gt4016, which resulted in Gateway KTBC51G, the code of the board.
This then resulted in the following image (click to zoom):



Please confirm your board has the same code on it ... you can see it right above the memory slots.

In the picture, it looks to me that the capacitors are more like 680uF

Considering the location, they're more likely rated for 4v but if you're going to go for electrolytic capacitors (because they're cheaper) you can go for capacitors rated for 6.3v

The Badcaps store doesn't have this value so here's some suggestions from Digikey:

make sure the diameter fits where the caps are:

10mm :

http://www.digikey.com/product-detai...696-ND/2207231
http://www.digikey.com/product-detai...067-ND/1662453
http://www.digikey.com/product-detai...708-ND/2207244

8mm:

http://www.digikey.com/product-detai...2-1-ND/2347910
http://www.digikey.com/product-detai...063-ND/1662449
http://www.digikey.com/product-detai...011-ND/1136101
http://www.digikey.com/product-detai...224-ND/1826688
http://www.digikey.com/product-detai...1465-ND/589206


BUT ... make sure it says 680uF on them first.

You don't have to pick the most expensive one from those, i'm almost sure they're all better than what you have on that board. If you can, choose 6.3v rated capacitors just to be on the safe side.

There's also Newark.com that is a good store to buy components.

PS.... If your capacitors are different and not green like those 4 capacitors more to the right in the picture ... write here what it says on them. Actually write it anyway. If they're green and with that top, they're probably Sanyo, which are not known for causing problems. If they're not, depending on what it says on them maybe it's safer to replace those four also.

[tbone901988]

Re: Unknown capacitor

Actually three of them also have 680 too.Those go like this:
50
.....whoops, you're right it is 680.
X on the 480, it is 50
680
4J

[tbone901988]

Re: Unknown capacitor

Your pic looks just like the mainboard I'm working on, perfect match.: )

[tbone901988]

Re: Unknown capacitor

you think 6.3 is high enough?

[tbone901988]

Re: Unknown capacitor

um.. OK, the green ones say...yep Sanyo 16V 2202 uf. Btw I thought the days of the capacitor plague were long gong,this comp is only 1-2 years old... according to the owner (former)

[tbone901988]

Re: Unknown capacitor

oh and the "skin" on the sanyos looks like it may starting to stretch, like when a cap goes
bad and the "skin" kind of shrinks down.
Thank you for your help identifying these caps
-Tbone

[mariushm]

Re: Unknown capacitor

The voltage on the capacitors near the CPU is usually less than 2v - CPU itself runs at 1.1-1.3v
So even 4v capacitors can be used there. Therefore yes, you can't go wrong with 6.3v rated capacitors there, as long as they would actually fit. Pay attention to the diameter.

Sanyo is a good brand, reliable. I personally didn't see Sanyo capacitors leak or go bad but I'm not as experienced as other members on this site.


If you want, replace them.. these below will work... based on what you say they're 2200uF 16v capacitors:

12.5mm diameter:


http://www.digikey.com/product-detai...2369-ND/613730
http://www.digikey.com/product-detai...1667-ND/756183
http://www.digikey.com/product-detai...402-ND/2433536

10mm ... it's tough, nothing adequate for motherboards in stock on digikey.

Maybe this one on Newark, but even this one it's kind of low in specs compared to those Sanyo capacitors (if they're the series I think they are):

http://www.newark.com/panasonic/eeuf...16v/dp/32R8994

I wouldn't change them if they're 10mm in diameter and the board works after changing those problematic caps near the cpu.


Re capacitor plague... it's most likely overheating and poor quality power supply of the system that made the capacitors go bad.

[tbone901988]

Re: Unknown capacitor

"it's most likely overheating and poor quality power supply of the system that made the capacitors go bad."
hmm... that's something to think about...

[c_hegge]

Re: Unknown capacitor

8mm:

http://www.digikey.com/product-detai...2-1-ND/2347910
http://www.digikey.com/product-detai...063-ND/1662449
http://www.digikey.com/product-detai...011-ND/1136101
http://www.digikey.com/product-detai...224-ND/1826688
http://www.digikey.com/product-detai...1465-ND/589206

I'm pretty sure they are 8mm, but I wouldn't use any of thse as replacements. for one thing, you drop the capacitance a bit when polymodding a VRM, so the first 4 should be 560uF. The last one is a Nichicon HE. Spec-wise, they're not even close to being suitable for the VRM of a modern board.

I'd just use https://www.badcaps.net/store/produc...products_id=79 and fill up the blank spots. I do that all the time for those 680uF OSTs that MSI sometimes use on the VRM out on s775 boards.

[mariushm]

Re: Unknown capacitor

You're right about one thing, the HE is indeed not suitable. Must have right clicked on the link under the link I wanted to copy to clipboard by accident.

Other than that, you don't HAVE to drop the capacity a bit.

The "dropping capacity when doing polys" as far as I know it's from some old Intel recommendations that were saying Intel processors need this much capacity and if go with electrolytics you should choose capacitors with more capacity because in parallel they'll have less ESR and all that.

He already has some sort of polymer or functional polymers there, or at least something that pretends to be polymers (they have vents which make no sense on polys but they look like polys and seem to be rated for 4v, if that's not a series/size code). I can't tell everything from that picture.

With the exception of his pocket, nothing will be damaged by going with 680uF polys imho.

[c_hegge]

Re: Unknown capacitor

It probably will work just fine, but his caps aren't polys at all. They are just standard electrolytics. Also, all but that first one are a bit taller than the originals (which look to be 8x8mm), which will be a problem if the heat sink goes over them.

[Uranium-235]

Re: Unknown capacitor

pay attention to the diameter? look at where the heatsink would sit

pay attention to the LENGTH too

[mariushm]

Re: Unknown capacitor

The first capacitor I recommended for 8mm is also 8mm in height. I'm sure he reads this and checks the height.

After seeing the image of the built system:



... i can understand why height might be an issue. I was picturing the system with the classical AMD stock cooler, which would have caused no problems with taller capacitors.

[c_hegge]

Re: Unknown capacitor

As I said in my last post, all but that first link and the ones I suggested are too tall. Given how closely spaced they are, though, the diameter will also be a problem.

EDIT: looks like mariushm beat me to it.