burnt 20+4 pin and +4 pin connectors??

[aidynphoenix]

what causes this in power supplies?
is a power supply that has a browning or charred connector dead?

will a recap fix this or is a different component the culprit?


I have a Antec "true550" power supply here. (i think that's the model)

looks like a decent power supply.

but the 20pin motherboard connector has 4 connections that are burnt.
each one is connected to a red wire wire. connector's 4,6,19,20

any chance to save this powersupply?

[dmill89]

Re: burnt 20+4 pin and +4 pin connectors??

Does the PSU power on (with a jumper wire between the green sensor wire and a ground{black wire})?
If so what are the voltages on each rail? (red wires should be 5V, Yellow 12V, and orange 3.3V)
Given that all the connections that are burnt are on the 5V rail chances are that rail was either horribly overloaded (not likely in any modern system) or there is something wrong with that rail. Opening it up and looking inside / posting pics of what is found will be beneficial.

[shovenose]

Re: burnt 20+4 pin and +4 pin connectors??

I bet you will open the casing to see a bunch of bulging/leaking Fuhjyyu capacitors on the secondary side of the PSU.

That's why the connector is burnt

[c_hegge]

Re: burnt 20+4 pin and +4 pin connectors??

^
Bad caps won't burn a connector - it will just increase the ripple until it fries the chipset. Burned connectors are a result of either drawing more than 6A/pin or poor contact.

[dmill89]

Re: burnt 20+4 pin and +4 pin connectors??

I bet you will open the casing to see a bunch of bulging/leaking Fuhjyyu capacitors on the secondary side of the PSU.

That's why the connector is burnt

With a CWT built True Power that is fairly likely. If the only problem is bad caps it is probably worth recapping (these are decent units aside from the lousy caps), it just depends if other damage was done and how bad it is.

[aidynphoenix]

Re: burnt 20+4 pin and +4 pin connectors??

Does the PSU power on (with a jumper wire between the green sensor wire and a ground{black wire})?
If so what are the voltages on each rail? (red wires should be 5V, Yellow 12V, and orange 3.3V)
Given that all the connections that are burnt are on the 5V rail chances are that rail was either horribly overloaded (not likely in any modern system) or there is something wrong with that rail. Opening it up and looking inside / posting pics of what is found will be beneficial.

12v rail. 11.91v
5v rail.. 5.00v
3.3 rail... 3.33v

going to open it now, and grab a camera. i'l get some photo's here in a few minutes.

[shovenose]

Re: burnt 20+4 pin and +4 pin connectors??

OK.
Yeah it's quite a shame they used crap caps; great power supplies otherwise!

[aidynphoenix]

Re: burnt 20+4 pin and +4 pin connectors??

opening it now.. here is a pic of the burnt 20pin connections..

http://img99.*************/img99/9892/sany2151.jpg

[aidynphoenix]

Re: burnt 20+4 pin and +4 pin connectors??

opened it and remember now after seeing the inside that i tried to recap this powersupply awhile ago.. this was after the burnt connectors though.. after i replaced the two bulding caps it didnt really get use, i just tested to see if it would power up a computer, which it did.
but im now needing a psu for spare computer and i want to be sure this one is ok.

I guess i only replaced the two that were buldging. and what i had didnt fit.
i was not aware at the time that caps could be bad and not look that way.

so i fit two nichicon PM(m) series 2200uf 16v 105c caps where the 12v rail filters sat.
didnt fit on the board so with one of them i had to run wires and sit the cap elsewhere.

http://img401.*************/img401/2818/sany2153u.jpg

[shovenose]

Re: burnt 20+4 pin and +4 pin connectors??

Problem is with all that extra wire the ESR gets way too high, in effect making those caps entirely useless.

[aidynphoenix]

Re: burnt 20+4 pin and +4 pin connectors??

well i can completely recap the psu.. was going to do that if i find out the psu is safe to use.. il probably order some neat looking connector kit for the psu so it doesent look all burnt up. il do the wire sleeving so it looks good..
and il try and spend alittle extra for 105c caps so it lasts me awhile.

but other than checking the voltages, any way for me to be sure this psu is safe?
or should i start with the recap?

[dmill89]

Re: burnt 20+4 pin and +4 pin connectors??

Most of the CWT Antecs I have recapped had Fhujyyu TM series caps which are (at least according to the data sheet) LOW ESR caps. I would probably use either Nichicon PW (roughly equivalent to the TMs) or UCC KY (one grade better than the TMs). I would also do a full recap if you intend to use it for an extended period of time since Fuhjyyus can't be trusted. The nichicon PMs you used would be ok if you could get them to fit but nichicon PW and UCC KY are easier to find in the correct sizes for those Antec PSUs.

[aidynphoenix]

Re: burnt 20+4 pin and +4 pin connectors??

well went to digikey and added all the caps i would need to my shopping cart.. total was about $20..
if i added alittle more money, i could get a whole new psu..
i think im just going to do that instead of fiddling with this one.

was pondering this one.

http://www.newegg.com/Product/Produc...82E16817139027

computer wont be too demanding, 90w CPU, Nvidia 7800GT. 4x1GB DDR2-800. 1.6v. single hardrive, dvd rom..

[shovenose]

Re: burnt 20+4 pin and +4 pin connectors??

I'd just get the new PSU if I were you

[c_hegge]

Re: burnt 20+4 pin and +4 pin connectors??

What are the specs on the system that TP-550 is powering?

[Scenic]

Re: burnt 20+4 pin and +4 pin connectors??

was pondering this one.

http://www.newegg.com/Product/Produc...82E16817139027

computer wont be too demanding, 90w CPU, Nvidia 7800GT. 4x1GB DDR2-800. 1.6v. single hardrive, dvd rom..

For a system like that, a 350W would be enough. Only trouble would be that most of the good ones in that range (300-350W) don't have a PCIe power plug, and those that do cost about the same as a decent 400+W.

Something like a Antec EA-380D or a Corsair CX430 V2 would be plenty, if not already overkill.
I'm personally running an overclocked quadcore (intel Q6600) + a HD6870 off of a 430W Seasonic S12 II.. just to give you a rough idea of the actual power usage of a system like that.

Most people ridiculously oversize the PSU. I've seen people put ridiculously overpriced 600W PSUs (PSU brand fanboys..) into Pentium Dualcore or Athlon II X2 computers with a mid-range graphics card (one 6pin PCIe, if it even needs one) and boast about it. Facepalm moment..

I understand the "I'm gonna upgrade the hardware later" argument to some dregree, but putting a PSU in a little dualcore box which could power an 8 core system with a 200bucks graphics card is just stupid.

edit: the above statement wasn't directed at aidynphoenix.. I meant in general. Just for the records :p

[aidynphoenix]

Re: burnt 20+4 pin and +4 pin connectors??

i just upgraded my main computer, got a new processor, motherboard, and ram.
and put my old motherboard cpu, ram into a new case.
old stuff isn't terrible. just not good enough for the new games i want to play.
AMD X2 5000+, AsusM2N sli deluxe mobo, 4GB DDR2-800 ram. 7800gt.

so my 2nd tower will be mainly for data storage.
i will add drives later when i have the money.

this computer i want to feel comfortable leaving on overnight for downloads
so it has to run cool, silent, and be stable.

so i like the corsair powersupplies. i hear seasonic is just as good.

I heard a little rumor somewhere that corsair and seasonic the only two brands that design all their powersupplies from the ground up?
and most of the other brands use the same board as them, but put cheaper parts on them to beat prices? such as coolermaster, rosewell, thermaltake, xion etc. is that so?

[dmill89]

Re: burnt 20+4 pin and +4 pin connectors??

i just upgraded my main computer, got a new processor, motherboard, and ram.
and put my old motherboard cpu, ram into a new case.
old stuff isn't terrible. just not good enough for the new games i want to play.
AMD X2 5000+, AsusM2N sli deluxe mobo, 4GB DDR2-800 ram. 7800gt.

so my 2nd tower will be mainly for data storage.
i will add drives later when i have the money.

this computer i want to feel comfortable leaving on overnight for downloads
so it has to run cool, silent, and be stable.

so i like the corsair powersupplies. i hear seasonic is just as good.

I heard a little rumor somewhere that corsair and seasonic the only two brands that design all their powersupplies from the ground up?
and most of the other brands use the same board as them, but put cheaper parts on them to beat prices? such as coolermaster, rosewell, thermaltake, xion etc. is that so?

If noise is a major concern you may want to avoid any of the Corsair Builder series. They are decent PSUs but are known to have issues with coil wine.

The Antec EA-380D Scenic mentioned is not a bad option. It is Delta built, although it will have some mediocre caps(Probably Ltec) in it since it is a budget model, but those generally last for several years in a PSU. The Antec High Current Gamer Series HCG-400 400W is SeaSonic built and has all Japanese caps if that is a concern for you. The PC Power and Cooling Silencer MK III PPCMK3S400 400W is also a good option right now since thy have a rebate on them, this is also a SeaSonic built PSU with Japanese caps, Both of these are based off of the S12II platform.

[PeteS in CA]

Re: burnt 20+4 pin and +4 pin connectors??

The Nichicon PM series - originally the PL series - is rather old. It came out around 1987 or so. The PW is at least 2 generations newer and 2 generations lower impedance. And the PW series is getting "mature".