Hello. I work a company that uses single board computers as wireless radios to provide internet service. The particular board we use are routerboards, made by mikrotik. They work well but unfortunately they are plagued with bad capacitors. We have some 50-60 that all have blown caps. We've replace the bad caps on some 10 or so boards, and have had very good success rate. Upon more research, We've decided to replace the remaining caps with not with aluminium electrolytic capacitors, but rather aluminum organic polymer capacitors. Has anyone done this before? I've read some where the because the organic polymer caps have a lower esr, that it is best to lower the capacitance by about half. The Main reason we want to go with organic polymer is because it is more stable of a wide temperature range, and living in minnesota, we see -40, as well as 100 degrees in the summer. I figured I'd ask here since you guys seem to know a great deal. the caps are we replacing are su'scon sj series cap. The added price isn't really an issue as years of reliable service is worth more than 3 dollars.
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Re: replace capacitor with Aluminum Organic Polymer Capacitors
post pics.
i can probably suggest what to use where.
i tend to develop polymods for industrial stuff.
one in hand would be best but its something i can usually do with some good pics. -
Re: replace capacitor with Aluminum Organic Polymer Capacitors
The caps that we are replacing are su'scon sj series caps. 560uf. the data sheet for them is available here http://www.su-scon.com.tw/en/product...r-105C/SJ.html. The data sheet makes them sound great, but they are junk, like I said we have already removed over 100 of them. The poly ones we are looking at using are these. but I don't know if they are a good replacement for the originals or not. http://www.mouser.com/ProductDetail/...R%252bJnGyM%3d. would these be a good replacement?Comment
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Re: replace capacitor with Aluminum Organic Polymer Capacitors
Polymer capacitors will still have about 2000-4000h of life in them, most of the cheaper ones are like that.
Seems like long life is important, especially if you say they work at extreme temperatures.
I'd rather go for the Panasonic FR series of electrolytics, depending on can size they have up to 10k hours of life - they're basically same esr and ripple as FM but with different can sizes and better life.
There's no 560uF with a voltage rating less than 25v, if you need less I think you'd be safe replacing it with 470uF or 680uF of whatever voltage you need.Comment
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a few days ago I finally purchased mser-100 v2 and I tested its abillity of measuring ESR value.
I found that It shows pretty accurate ESR value for electrolytic capacitor,But When I measure polymer capacitor of dreamcast game console,I found that one third of polymer capacitor's ESR value is more than twice the value of ESR meter table.(for example, I measured one polymer capacitor of 6.3v 100uf, It showed ESR value of 7.68)
Although my dreamcast now turns 20 years old but it still works. I occasionally have played game with it.
Is this ESR value of polymer capacitor correct?... -
Hi, I have some 32 bits computer motherboards that need repair, as they fail to
power on.
Here are some examples :
(N.B. "capacitors" indicated here are electrolytic capacitors located in the onboard
switching supply area).
(N.B. #2 : I could not find a 3300 microF aluminum-polymer with a higher voltage
than 6.3 V.)
1 - Motherboard #1 : this is an Asrock K7VT2 (socket A) that still works well. To put it on test
I replaced capacitors with aluminum-polymer.
3300 microF/6.3 V. x 4 replaced by 3300 microF/6.3 V. (KYOCERA... -
I will be pulling my crown vic ECU and recapping it. 3 in total, 47uf 16v x2 and a 10uf 63v
I hope they havent puked yet. I was thinking of replacing them with Aluminum - Polymer thru hole caps. probably 47uf 25v and 10uf 80v
They arent cheap. Anyone have any experience with them? Am I wasing my money on premium caps?
Nichicon PLV series
thanks -
I've just been repairing some (very) old speakers with a loud hum that occurred as soon as you powered them on regardless if any actual audio is played through them. I work in a School so it's 99% likey that the Teachers have hardly ever turned the power off on them for well over 10+ years.
As you can see the top large capacitor on the right has a bulge on the top so defincately needs replacing. As the one next to it is exactly the same capacity and voltage I planned to replace them both.
What is your advice/opinion on whether or not on old(er)... -
Do we know if they do? My slim is a 70012 model, though I've seen these polymer-looking capacitors in another slim revision. The service manual says nothing (apart from the values), nor do google and the many other forums. I've already replaced all the obvious electrolytics -- with no performance problems after a year -- but these colored-top ones grouped in the back are a mystery, and I don't feel like potentially screwing up things.
I think it's odd that apparently nothing exists online addressing these capacitors in ps2 slims in the nearly 20 years the console has been aroun...
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