2 CFI-S76 boards with failed caps

[Markeh]

Got 2 of these boards. Both have the three GSC 2200uf 10v caps leaking electrolyte from the top (well some are visibly bulged and a couple have started leaking) to the left of the CPU socket (see attached picture 1) and both have a TEAPO 1000uf 6.3v cap bulging, albeit in different places. One board has it in between the northbridge and southbridge, and the other has it up towards the CPU fan header (in the image it's the centre of the 3 caps - this one looks worse in reality than my phone camera can show)

Am I best off replacing with these? (with this Panasonic cap to replace the GSCs http://uk.farnell.com/panasonic/eca1...0uf/dp/1848535 and this one for the Teapos http://uk.farnell.com/panasonic/eca0...-3v/dp/9692738). I've never tried replacing caps before but I got these boards with a very nice mITX case that won't take any other mITX board due to the back panel (and even if I cut this out, I don't have cash to spend on an mITX board :S)

Picture annotations
Board 1 Teapo - This is the taller one to the immediate right of the BIOS chip.

Board 2 Teapo (the middle one of the three)

[selldoor]

Re: 2 CFI-S76 boards with failed caps

Please can you delete the pictures and add them to the post using "manage attachments" which is found by going to " Go Advanced" under quick reply

Please also update your profile with country and mains voltage

[Markeh]

Re: 2 CFI-S76 boards with failed caps

Sorry, will do that now.

[selldoor]

Re: 2 CFI-S76 boards with failed caps

I dont think the nhg series caps are good enough ( low enough esr).
It is often hard to find these caps in this size and people use polymer replacements.

I dont know enough about polymodding to make any suggestions hopefully Toasty will spot the thread and make some.

In the meantime it would help if you stated the physical size of the caps you are going to replace - you will have to replace the whole row and ideally any other similar make series of that cap on the board as if some have gone the rest will soon give up.

Forgot to say the owner of this site sells caps -
https://www.badcaps.net/pages.php?vid=26
you would need to check sizes/stock
Charges a reasonable 8us$ postage and no minimum order which
I think you will find digikey farnell mouser have - unless you have
connections perhaps through uni rs online is used often

[Markeh]

Re: 2 CFI-S76 boards with failed caps

GSCs are 20mm high and 10mm diameter, Teapos are 10mm high and 8mm diameter.

Minimum order is only really a problem with the GSCs as I need 6 and Farnell's minimum order is 5. The Teapos, there's 12 on each board so I'd need 24., so make that 25.

I might just do one of the boards, then I just need to order 5 and 15 respectively.

Will this do instead of the GSCs? The ESR is 0.1809ohms and I have no idea whether that's good or bad, but it's the lowest I can find. Never heard of the brand though. http://uk.farnell.com/illinois-capac...10v/dp/1167980
Lowest I can find re: Teapos is either this which doesn't look right to me: http://uk.farnell.com/nichicon/rl80j...-3v/dp/1854125 at 0.0009ohms or this http://uk.farnell.com/nichicon/uhe0j...-3v/dp/1823617 at 0.35ohms (once again I have no idea if this is good or bad, but it's the lowest one that looked right. The additional height wouldn't be a problem in any of the locations of these caps, but I don't know if height is a problem, as I say, I'm hardly an expert.

The bonus with all 3 of these is that there is no minimum order quantity.

I forgot to mention, each board has 6 visually sound Sanyo 3300uf 6.3v 10mm diameter caps that are roughly 18mm in height. Would these need replacing as well or are these a reputable brand?

[mariushm]

Re: 2 CFI-S76 boards with failed caps

Sanyo capacitors are very good, it's unlikely they're bad.

I don't think you have to replace all the Teapo capacitors, I'd leave the ones that are not really close to things that get hot, like mosfets, transistors, inductors.

Since this motherboard seems to be driving the processor vrm from 5v rail (those swollen capacitors would be 16v otherwise), I think it would be safe to use 2200uF 6.3v instead of 10v capacitors.
This should give you some options, for example:

nichicon hm 2000h 3.5mm lead : http://uk.farnell.com/nichicon/uhm0j...ial/dp/2113081 (better specs than fm and fr but less life, i'd go for fm/fr, unlikely the board needs this low esr)

panasonic fr 10000 h 5mm : http://uk.farnell.com/panasonic/eeuf...-3v/dp/1219449 (a tiny bit less good on paper than fm but make up in endurance so rating them above fm)

panasonic fm 5000h 5mm : http://uk.farnell.com/panasonic/eeuf...-3v/dp/1219449

rubycon zlh 10000h 5mm : http://uk.farnell.com/rubycon/6-3zlh...-3v/dp/8127166

As for Teapo 1000uF 6.3v you could replace with :

Panasonic FM 1000/10 8x20 : http://uk.farnell.com/panasonic/eeuf...10v/dp/1219456

Rubycon ZL 1000/10 8x20 : http://uk.farnell.com/rubycon/10zl10...10v/dp/1144682

[Markeh]

Re: 2 CFI-S76 boards with failed caps

Looking at going for the FRs to replace the GSCs and the Rubycon ZLs to replace the teapos, my only concern is the voltage of the Teapo replacements is 10v and not 6.3v, and the height is twice that of the originals, but will this particularly matter?

[selldoor]

Re: 2 CFI-S76 boards with failed caps

Higher voltage is not a problem and you will need to see if you have enough
height clearance - If near where fans have been taken off remember to allow for them if they overhang where the caps go.

[mariushm]

Re: 2 CFI-S76 boards with failed caps

Go with the FM series for 1000uF, they're cheaper and have longer life.

The voltage rating on capacitors is the maximum voltage they can handle continuously. A capacitor rated for 10v can be used to replace a capacitor rated for 6.3v without problems.

The technical characteristics of capacitors are influenced by the dimensions of the capacitors and the quality of the materials inside. Generally (but not always), a capacitor with bigger volume has better performance (lower ESR, can withstand bigger ripple values).

I recommended those 10v rated capacitors simply because it looks like you have room on the board to go a bit more in height (i don't see the height blocking video cards or memory slots or the cpu cooler) and Farnell stocks these capacitors in bigger quantity, therefore they're often cheaper.