Asus TUSL2-C Ost recapping

[willawake]

This board was completely stable but i was curious about the Ost RLS 1000uf 6.3v on the board. I have a few CUSL2 in the office with the same issue and have seen other asus boards also where the ost appear to be doing a small bit of bulging around the vents. It looks as if they have been stamped too hard but I am not sure.



actually it would be interesting at this point to compare the TUSL2 to a CUSL2 shown below to see if there are any apparent differences. It appears there is more capacitance on the CUSL2 but actually all the large values are 1500uf 6.3v, there are no 3300uf like on the TUSL2



This CUSL-2 has all Rubycon caps except for one Sanyo. It is my favourite one. unfortunately it has a crappy ps/2 problem which i cant figure out.

Anyway back to the TUSL-2, the board has quite a selection of good capacitors on it so i decided to recap the ost since i have some caps and be sure that the board will continue to provide good service. It currently has a 1200 tualatin on it therefore is a nice machine, running fedora 4.2.



you can see the cap on the right is not bulging, however the one on the left is.



the remainder of the Ost RLS caps were all showing this bulging. It is curious.



the Ost RLS were tested with an ESR meter following removal from the board and are (2 pieces) 0.03ohm, (9 pieces) 0.04ohm, (1 piece) 0.05ohm. Which is not bad at all.



for the recapping i used Rubycon MCZ 1200uf 6.3v.



this is another Asus where the board markings are opposite for the polarity of the caps.

[Rainbow]

Re: Asus TUSL2-C Ost recapping

Thanks for the test The ESR is good so caps with vents looking like that are probably not bad.

[Galvanized]

Re: Asus TUSL2-C Ost recapping

Givin that they test good. My guess would be doubled sheets of aluminum when through the stamping machine or disks did not clear, causing a doubling up. They look like they were struck for all they were worth, anymore would have cut them.

[Shroomie]

Re: Asus TUSL2-C Ost recapping

Good to know those are probably safe. Got some caps looking like that myself, I've been watching them...

Thanks for the info, willawake!

[willawake]

Re: Asus TUSL2-C Ost recapping

this board now recapped further with what i had. the 1500 6.3 with 2200 10v and the 3000 6.3 with same. now it is all rubycon mcz and my new office computer

damn i wish this board would take 1gb

i got one of these cases also https://www.badcaps.net/forum/showthread.php?t=1928
but in white though. i will get some nasty 120mm fans cos there is so much noise from the road who cares

i had a big problem with my office 866 cusl2 and sil ata card, my several hdds were making errors and not responding after about 2 years of working fine. wierd shit. so i start swapping components, i replace the zalman active psu with a forton bluestorm. same thing. i replace ata card same thing. i get new hdds same thing. then a day later it was not doing it. so anyway i replace with the tusl2 instead on a clean install and i will check and recap the cusl2 to see what is up.

[Tom41]

Re: Asus TUSL2-C Ost recapping

I've seen bulging caps before, but never 'depressed' caps! It looks like either the vent stamper hit the cap too hard (like Galvanized said), or something damaged them in transit.

You'd think that depressed caps would have similar problems as bulging caps, given that the electrolyte and/or foil would be compressed. But if they tested fine for ESR, there's nothing to worry about - right?

Someone should try deliberately pushing the top of a cap so that it collapses, and seeing how far you can go before the ESR changes

[willawake]

Re: Asus TUSL2-C Ost recapping

i have seen it quite a bit. thats why i was interested in testing them. there is also capacitance to test which i cant but i would have expected at least some of a group of bulging caps to show raised esr which these didnt.

i checked out the psu that came with the case today which is the same as the ISO psu in my case review linked above. Interestingly it came with all Fuhjyyu caps this time not Koshin like on the other one. not that i really care though cos i will probably sell it to a cheap ass client.

[willawake]

Re: Asus TUSL2-C Ost recapping

Someone should try deliberately pushing the top of a cap so that it collapses, and seeing how far you can go before the ESR changes

this can be arranged

[stng]

Re: Asus TUSL2-C Ost recapping

I have a TUSL2-C mobo that don't post when power up ..only fan is spinning
but when i touch the clock controller chip it's hot ..is it this chip that cause
the mobo stop posting ?

[Rainbow]

Re: Asus TUSL2-C Ost recapping

Clock generators usually heat up when working.

[willawake]

Re: Asus TUSL2-C Ost recapping

what is the history of that board? did you receive it not working?

i think the caps will be ok. check for trace damage especially around the cpu clip area.