I am recapping a power supply that quit turning on. I went and opened it up and it has 3 bad caps, 2 blown and 1 swelled. They are capxon. I have some extra caps laying around so i'm going to try to recap it. The 6.3v 2200uf i am replacing is a little shorter then the one that was in the psu. Will it still work long as it matches the volts and the uf?
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Re: Antec BP500U Bad Caps
The physical dimensions won't tell you anything about how suitable the replacement capacitors are.
You need to find the datasheet for those Capxon capacitors and see if the replacement capacitors are close to the specifications of the old ones.
The impedance value (at 100kHz) needs to be as close as possible and the ripple should be very close to, or higher than the old one.
Power supplies are sensitive when it comes to what capacitors are used, so you can't just grab a general purpose capacitor from Radioshack and install it and be sure it's going to last.
If you want, post pictures with the insides of the power supply and tell us what's written on those capxon capacitors (uf value, voltage, brand name and series - it's usually a two letter code, this is important)
As it doesn't start, you may want to check the fuse and the small capacitors by the main transformer, because if one of those is bad (the small ones don't always swell up) the power supply may not start. -
Re: Antec BP500U Bad Caps
Ok, so it's Capxon KF series.
The datasheet is here:
So your capacitor is one of the two below.
2200uF 10x20 1380mA 0.09
2200uF 10x25 1470mA 0.095
The KZG series datasheet is here:
2200uF 10x20 2550mA 0.013
Since you say the UCC capacitors are shorter, you probably have the 10x25 variant of Capxon KF.
The KZG is good when it comes to ripple it can handle (2550mA > 1470 mA) but its impedance is much lower at 0.013 compared to 0.09.
This can cause instability on the output of the power supply, if the power supply was designed with that higher impedance in mind.
In addition, the KZG series, along with KZJ if I remember correctly, are two series made by United Chemi Con which have issues, they tend to go bad at some point, often without swelling up.
Any other series from UnitedChemiCon I would have no problems recommending.
For testing purposes, I think it would be OK to use this KZG, but for actual use, you shouldn't. Try getting a capacitor that has an impedance closer to 0.09... something around 0.05 would probably be ok.
These for example would be more suitable:
Nichicon HE : http://www.digikey.com/product-detai...1472-ND/589213
UCC KY : http://www.digikey.com/product-detai...1491-ND/756007
UCC LXZ : http://www.digikey.com/product-detai...1882-ND/756398Comment
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Re: Antec BP500U Bad Caps
Prey tell, why does the bigger 10x25mm cap have higher ESR, but also higher ripple current?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Antec BP500U Bad Caps
Well my first psu recap was unsuccessful. I plugged it in to a known good pc and got no power out of it. This leads me to the 400v 330uf possibly could be bad or theres something else thats wrong with it. I have triple checked my solder joints and looks good.Comment
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Re: Antec BP500U Bad Caps
I would up the capacitance too on at least the 12V because these things have high ripple, that's what I did on mine.Comment
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I know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.
For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).
https://www.badcaps.net/filedata/fetch?id=3591771
https://www.badcaps.net/filedata/fetch?id=3591772
It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:
https://www.badcaps.net/filedata/fetch?id=359177... -
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