Need help with finding good Caps companies - Page 1
Forum section: electronics / projects

author: markitzero
author_rank: Newbie
timestamp: September 28, 2013, 09:32:03 am
content: I am working on a Dell 1704FPVt Monitor that I got from a yard sell for $1US and when I got it home and it failed to start. When I opened it up I found 5 CapXon"cruddy caps" caps popped. I am trying to find the good Cap Companies to replace the cheapo CapXon Caps.I don't know if this is the section that this type of post goes into.

author: andtfoot
author_rank: Unknown
timestamp: September 28, 2013, 09:38:18 am
content: The repair tech at my work generally uses Nichicon caps and reckons they are pretty good.I'm sure there are others around though.

author: Rerouter
author_rank: Super Contributor
timestamp: September 28, 2013, 10:46:07 am
content: I'm a fan of Panasonic caps.

author: wraper
author_rank: Unknown
timestamp: September 28, 2013, 11:22:39 am
content: Rubycon, nichicon, Nippon chemicon, panasonic, sanyo, elna are the best. Samxon, exept GF series which is total fail, also is good. Samwha, exept WB series, Jamicon, Hitano should be also satisfactory for monitors, but I would use slightly higher capacitance or voltage for them to be safe (higher value have also higher ripple current). Check datasheets for max ripple current and ESR. Use series that are same or better on max ripple current or use higher capacitance/voltage caps to meet needed ripple spec.

author: Fsck
author_rank: Super Contributor
timestamp: September 28, 2013, 11:31:05 am
content: Ones I trust implicitly: Rubycon, Nippon/United Chemicon, Elna, Sanyo OSCON, NEC ProadlizerWould have to consider the exact type/model: Nichicon, Panasonic, Malloryit's a really short list for me.

author: wraper
author_rank: Unknown
timestamp: September 28, 2013, 11:31:41 am
content: BTW change all caps except biggest high voltage one. They may seem good but not every non bulging cap is good. Low values doesn't bulge usually. Even if they are good now they tend to fail shortly after repair.

author: TimNJ
author_rank: Super Contributor
timestamp: September 28, 2013, 04:37:35 pm
content: Panasonic FR series are among the best caps on the market and they are surprisingly cheap.

author: wraper
author_rank: Unknown
timestamp: September 28, 2013, 05:26:42 pm
content: Forgot to say, stay away from ebay when buying capacitors. There are more fakes than real stuff, especially if they are expensive brand.

author: markitzero
author_rank: Newbie
timestamp: September 28, 2013, 06:44:29 pm
content: ok now here is another question were to get them? other then ebay because the only place I know that comes to mind is digikey I don't know any other.

author: andtfoot
author_rank: Unknown
timestamp: September 28, 2013, 06:59:33 pm
content: Quote from: markitzero on September 28, 2013, 06:44:29 pmWhereabouts are you?A few of the international ones I can think of are:DigikeyElement14 (Farnell)MouserRS-ComponentsI haven't actually checked which brands they carry though.

author: TimNJ
author_rank: Super Contributor
timestamp: September 28, 2013, 07:10:38 pm
content: I'd buy from Mouser or Digikey ,but that's just me.

author: Dave
author_rank: Super Contributor
timestamp: September 28, 2013, 07:30:24 pm
content: Vishay, Cornell DubilierIf you want genuine caps, buy them from from reputable distributors (not eBay). Counterfeit caps may even meet the specs of the original caps when new, but will betray you on the long run.

author: elgonzo
author_rank: Unknown
timestamp: September 28, 2013, 07:47:22 pm
content: Quote from: markitzero on September 28, 2013, 06:44:29 pmGenerally, follow the advice by andtfoot above, but don't fortget to check shipping conditions. Depending on your country, these distributors might charge a lot for small orders. It could happen that a local distributor in your country might have higher component prices, but would be the better alternative for smaller orders due to cheaper shipping.EDIT: Seeing that you got the thing from yard sell for $1US, your country should be obvious. I am sorry for my brainfart

author: markitzero
author_rank: Newbie
timestamp: September 29, 2013, 09:56:46 am
content: I will not be able to get the parts until next month but if I get it up and going and if the display is 100% done I will post pics of the display working. I am going to be replacing just the ones that are popped for now and when I can replace the rest later because I am on a very tight budget and fixed income.

author: amyk
author_rank: Super Contributor
timestamp: September 29, 2013, 11:33:24 am
content: Quote from: Fsck on September 28, 2013, 11:31:05 amThose things are a well-known failure point in Toshiba laptops... sitting right underneath the very hot CPU and rated at only 1000hr@105 they don't last very long, and the solution is usually to replace them with an array of tantalums.

author: Fsck
author_rank: Super Contributor
timestamp: September 29, 2013, 12:09:19 pm
content: Quote from: amyk on September 29, 2013, 11:33:24 amif you're deliberately cooking them, that's a design problem and should probably be sufficient cause to fire the engineers responsible. if they're dumb enough to pick low lifetime parts to place near a massive heat source... they're probably going to be making other mistakes of similar magnitude ie using the proadlizer not as intended by also charging and discharging the poor thing excessively.

author: M0BSW
author_rank: Frequent Contributor
timestamp: September 29, 2013, 01:35:40 pm
content: Personally my favourites are Rubycon

author: Stonent
author_rank: Super Contributor
timestamp: September 29, 2013, 04:18:14 pm
content: I've seen some popped Jamicon caps before. I don't recall when.

author: wraper
author_rank: Unknown
timestamp: September 29, 2013, 06:25:01 pm
content: Quote from: markitzero on September 29, 2013, 09:56:46 amYou are going to save <2 bucks? That doesn't make sense to me.Quote from: Stonent on September 29, 2013, 04:18:14 pmI have seen all big brands to be dead. I also have seen dead jamicons in computer PSU's, IIRC FSP? put general purpose TK series there which, no surprise, popped. Whatever, I would better replace all of them by cheap samxons or others rather than replacing five of them by rubycons and leave old Crapxons there. Even if you choose crappiest from which I listed, without replacing with bigger spec ones, they will work 3+ years, no doubt. At the same time I really doubt that remaining capxons will last more than 1-1,5 years before some of them fails. If they are not already, maybe they just didn't bulge.

author: markitzero
author_rank: Newbie
timestamp: September 29, 2013, 08:22:52 pm
content: I have $1US in cash and about $2US in my bank, I have to wait till the first of the month.Quote from: wraper on September 29, 2013, 06:25:01 pm