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linw
01-02-2005, 03:38 PM
Another bulging capacitor problem! This time on a Gigabyte GA-8IEX mobo just over two years old. I am told Gigabyte doesn't have a fix/replace policy - surprise. Wonder about the Consumer Guarantees Act??

Anyway, I have tacked a very ordinary 2,200UF 16V cap in place of the bad 3,300 6.3V low ESR one. It works - yea. But I want to get the right ones. Does anyone know if there is a NZ source of these specialised caps? Or an international site that posts to NZ? Even the right diameter is hard to find and when there are 7 closely packed in a row an extra couple of mm can be problematic.

TIA.

Speedy Gonzales
01-02-2005, 04:05 PM
Have u looked or been to dick smith? They sell resistors / capacitors etc.

godfather
01-02-2005, 04:07 PM
http://www1.jaycar.co.nz/

Graham L
01-02-2005, 04:08 PM
Jaycar have low ESR capacitors; DSE's are probably not.

Terry Porritt
01-02-2005, 04:10 PM
Radiospares sell Rubycon low ESR capacitors up to 2200uF.

For a 6.3v 2200uF, the RS stock number is 421-6546, and the part number is 6.3ZL2200M10X23.


Try this page :
radiospares (http://www.rsnewzealand.com/cgi-bin/bv/browse/Module.jsp?BV_SessionID=@@@@2036016190.1107229913@ @@@&BV_EngineID=cccfadddjmgjhkmcfngcfkmdgkldfih.0&cacheID=nznetscape&3284682868=3284682868&catoid=-77699476)

and see if it works for you.

linw
01-02-2005, 06:13 PM
Thanks, all. The one I have in now is DSE and it isn't the right one by a mile. Jaycar have a 10V 2,200 lo esr and 12.5mm dia. The RS Comp offering is the right spec except it only goes to 2,200UF, as well.

www.digi-key.com has the Panasonic 3,300UF components so may have to go there. NZ just seems to be too small for low demand products. But thanks again for your trouble folks.

Cheers.

bartsdadhomer
01-02-2005, 06:56 PM
I'll get the name of a local guy who got me some from Aussie a few months back
What is the exact cap you want?

drcspy
01-02-2005, 07:23 PM
watching with interest I've had similar probs at times and nope dse dont have those particular caps.....

zqwerty
01-02-2005, 08:25 PM
If you can find your local computer recycler you will be able to get any number of older motherboards or whatever that will have perfectly good caps on them that you can solder suck off and use. In Christchurch it is Molten Media. Very cheap as well.

godfather
01-02-2005, 09:55 PM
If you can find your local computer recycler you will be able to get any number of older motherboards or whatever that will have perfectly good caps on them that you can solder suck off and use. In Christchurch it is Molten Media. Very cheap as well.

Not the smartest idea though. They are unlikely to be "perfectly good" unless the motherboard is reasonably recent (and does not suffer from the same malady)

From:

http://www.siliconchip.com.au/cms/A_30328/article.html
"All electrolytic capacitors have a finite life, measured in thousands of hours. Unlike the exceptional cases discussed in this article, there are usually no external signs that a capacitor is nearing its end of life. However, it is possible to determine whether a capacitor is serviceable or not by measuring it's ESR (Equivalent Series Resistance).

Fitting a component that could be on it's last legs anyway makes little sense.
Capacitors on a motherboard actually work very hard and older ones are expected to fail, if they have done a lot of hours.

zqwerty
01-02-2005, 11:19 PM
Motherboards end up on the scrap heap for a variety of reasons, not all because of capacitor failure, and certainly not because of old age, mostly they have just been superceded by a newer model and replaced by the owner. I know that all equipment has an M.T.B.F (mean time before failure) but you will find by just examining the power supply rail in question with an oscilloscope, whether or not the E.S.R is low enough to do the job by the amount of ripple. By putting capacitors in parallel you can lower the overall E.S.R, the only reason not to do this is because of physical size restraints. So if you can't get the correct capacitor, this solution will work in the interim. If the capacitor E.S.R is too high the capacitor will get hot and the resulting pressure, bulging and venting of electrolyte will further lower the E.S.R in a runaway effect resulting in the failure that you have already seen exhibited. You can compare similar capacitors on the board to check the temperature is acceptable.

The reason I have posted this information is because I have done a fair amount of design work on switching regulator power supplies and I am fairly confident of my knowledge in this area. Of course the ideal would be to get the correct part, but there are other acceptable solutions.

zqwerty
01-02-2005, 11:30 PM
More here:

http://forums.pcworld.co.nz/archive/index.php/t-51184.html

zqwerty
01-02-2005, 11:56 PM
N.B.

M.T.B.F. for electrolytic caps should be approx 64kh @ 55C, this would be about 7 years running 24 hours a day. This time reduces considerably the closer the running temp is to 105C (2kh).

whetu
01-02-2005, 11:59 PM
get the low esr caps from jaycar. I replaced 18 bung caps on a motherboard that was given to me, and now it goes hard once more.

Bung socket A mobo - free
Soldering skills - earnt over time (Dad started me early)
Replacement caps from jaycar - $10.30
One and a half hours of my time - free

Getting a super solid mobo for essentially ten bucks - priceless

dont worry if the values dont match exactly, so long as the uF rating is AT LEAST the original rating and not completely overboard (eg you wouldnt replace a 10uF cap with a 1F cap ;)), and the voltage rating doesnt matter, so long as it is equal to or higher than the original rating.

For example I was replacing 1500uF 6.5V caps, in the end I got 1500uF 10V caps...

Jeremy
01-02-2005, 11:59 PM
Well this guy (http://www.rawiriblundell.com/index.php?p=43) used some capacitors from JayCar to fix up a dead motherboard.

PaulD
02-02-2005, 06:33 AM
He's just blown his own trumpet :-)

Budda
02-02-2005, 06:51 AM
i would just get them from rs or farnell, both of them should stock those components or be able to source them for you for a price

JJJJJ
02-02-2005, 07:28 AM
I'd throw out the M/B and buy a new one.
Jack

linw
02-02-2005, 03:09 PM
Thanks for input. I have had a closer look at my board and noticed that the 7 X 1500UF CPU ones are Panasonic so I won't touch them. The rest are GSC. Only the one 3300UF 6.3V has crapped out. There are two other 3300's so I will probably just change these 3 and keep a close eye on the others.

Farnells have 3300 at 10V (panasonic) $3.39 + GST each. Unfortunately, Jaycars don't have a 3300 one. (But my subbed 2200 is still working fine!).

Cheers,
Lindsay.

Graham L
02-02-2005, 03:20 PM
Good thinking. They will have come from the same batch. You've got the board out, it's as easy to do three as one.

Growly
02-02-2005, 03:59 PM
Well this guy (http://www.rawiriblundell.com/index.php?p=43) used some capacitors from JayCar to fix up a dead motherboard.

HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA

drcspy
02-02-2005, 04:16 PM
hey there I could do with four 3.300uf's@6.3v but if you reckon 10v will work.............if you could either post soem more info about where this Farnells is or maybe contact me thru the private messages so i can purchase some off you ?

Billy T
02-02-2005, 04:51 PM
Voltage rating is unimportant, as long as it is equal to or higher than the original component.

The capacitance is also not 100% critical if using good quality low ESR caps. Substituting 2200F for 3300F is no big deal as most caps are generously rated and often measure higher than their notional capacitance value.

I would perhaps be a little more careful if replacing a large number of caps that are all in parallel, as the resultant capacity and impedance could be a bit lower than the required spec, but don't sweat it if you are only changing two or three.

Jaycar would be the preferred supplier, RS Components and Farnell charge like wounded bulls.

Cheers

Billy 8-{)

whetu
02-02-2005, 08:45 PM
...

erm... ok... how about you go sit in the corner and be quiet until you've got something constructive to add?

linw
02-02-2005, 10:20 PM
Ref to Farnell for 3300UF low esr 10V cap
http://nz.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=3036091&N=401

I think I will take a punt on the 2200's from Jaycar. At least I will know what the problem is if the mobo goes unstable! In any event, I have seen where someone tested the companion caps that looked OK on a board that had crook ones and all were naff. So maybe 2200 good ones are still better than naffed 3300's!

Thanks and cheers,
Lindsay.

supastar69
13-02-2005, 09:14 AM
Really new to the site here.

I having the same problem with my mobo. I have a Jabil Athlon 1.2Ghz Mobo and 3 capacitors have blown.

They're rated 1500uf 10v and are an exact match to the ones listed in the previous link.

My dilema is that I am having great difficulty in finding a retailer who has them in stock here in Toronto, much still carries them.


Should I go up to a 2200uf or are there other options for me.

Thanks in advance,
Peace out.

Graham L
13-02-2005, 01:10 PM
Welcome to Press F1.

Extra capacity, within reason, won't hurt (as long they will fit). In fact, higher capacity units will have a higher peak current rating, and lower ESR.

The capacitance tolerance on electrolytics tends to be something like
-50%/+100% or so, anyway.

Billy T
13-02-2005, 02:51 PM
Hi Supastar

Go up to 2200F, it won't cause any problems.

Best source is a hobbyist electronic store, but if you can't find one, go to any electronics repair shop (that actually repairs audio/TV/video, there should be a few around) and ask them if they have any, or can they get them.

If really stuck, order them from Jaycar Electronics in New Zealand or Australia. They would airmail them to you I'm sure.

www.jaycar.co.nz or www.jaycar.com.au

Cheers

Billy 8-{)

kalhihaaru
15-05-2005, 08:40 AM
3.300uf's@6.3v GSC T19A

Agent_24
20-05-2005, 05:11 PM
Yea I need a few of the 1500uf 6.3v caps too - but I'll get 2200's if you reckon they'll work.

Agent_24
20-05-2005, 06:02 PM
I think I found the right ones here at Farnell (http://nz.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=767360&N=0)

however I'm not sure they are low esr or suitable for a mobo, and the fact that it would cost me $45 just for the caps, not including delivery or anything so that's a good reason why I don't think I'll get them.

2200uf's from Jaycar seem the logical move (and cheaper), or could one get away with 1000uf ??

Camiron
29-02-2008, 01:09 PM
just a quick update, Ive found this site
Radial South Island (http://www.sicom.co.nz/xurl/function/prodlist/pointer/80/searchtext/626C616E6B/grpid/6453/content.html) that sells that sort of cap you were all talking about....i know this topic is a little old

PENTIUM
29-02-2008, 03:11 PM
With motherboards that have faulty capacitors, some of which may show domed heads and brown dribble, I find it cheaper in the long run to fit a new motherboard. Yes I do have a soldering iron and have used one for 60 years!

beeswax34
29-02-2008, 05:45 PM
just a quick update, Ive found this site
Radial South Island (http://www.sicom.co.nz/xurl/function/prodlist/pointer/80/searchtext/626C616E6B/grpid/6453/content.html) that sells that sort of cap you were all talking about....i know this topic is a little old

3 years is a LITTLE old?