caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

[stj]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

lol

[lti]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

I have a similar power supply (Dell HP-P2507F3C) that overheated (the fan control thermistor came loose from the heatsink), causing one of the caps to fail. I would like to recap it, but I can't read the values of four caps. One is labeled C417 and is underneath the cable bundle. There are also two between the cable bundle and the coil. The fourth unknown cap is in between the two heatsinks and is almost touching the secondary heatsink. I would also like to find an apropriate replacement for the 470uF 25V. This cap is an Asiacon HT series and measures 10x15mm. The other four are Asiacon LE series.

[kaboom]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

EWW!

Asiacon/Asia-x- replace all with Nichicon PW or Panasonic FC. Even the 'small' caps. They are important.

Even if you have to remove them to check their values, do it anyway- even with PI filters, there are only 3 'before' and 3 'after.' Probably 10V on +5 & 3.3, four caps. Of course, two 16V caps for +12. -12, and -5 if used, will be 16V and 10V, respectively.

-Paul

[lti]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

I'm looking for the capacitance values of those four caps I mentioned above. I couldn't read the markings on those four.
Also, Asiacon is actually another name for Hermei. I never found anything about Asia-X.
I also need to find values for the small caps if they need replaced as well. I was thinking they would, considering how hot it got.

[PCBONEZ]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

Jumping on using FC & PW when you don't know what the originals are is foolish.

Originals could EASILY be FAR higher grade than FC or PW and those 8mm and larger most likely are.

Need better ID's on these caps before -anyone- can tell you anything with any degree of confidence.
Anything without that is just a wild guess.
.

[PCBONEZ]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

The HT series is a GP cap and FC/PW would be fine for those.

The LE series is rated about the same as Chemicon KY & Nichicon HE.
FC & PW aren't anywhere near good enough to replace those.
.

[lti]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

I found that Nichicon PW series is good enough to replace the 2200uF caps.
Here is what I have chosen so far for replacements:
2200uF 10V:
http://search.digikey.com/scripts/Dk...me=493-1752-ND
3300uF 16V:
http://search.digikey.com/scripts/Dk...me=565-1535-ND
470uF 25V:
http://search.digikey.com/scripts/Dk...me=493-1826-ND
I still need to identify the four caps I mentioned above.

[PCBONEZ]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

Yeah, a PW will work when you go from 16mm to 31.5mm length.

If you pull the PCB from the chassis you might get a better viewing angle to ID the caps.
If it is really tough to see then shinny up a knife blade [or something similar] and use it for a mirror.
[You can use tooth paste for the shinny up polish if you don't have any car polish handy.]
.

[lti]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

The original caps were 21mm tall. Also, those were just the cheapest caps that had the correct ESR and ripple specs.
I didn't have the time to remove the board from the case. I had only scheduled enough downtime to clean the case and oil the PSU fan. This is my parents' computer, and they use it all day, every day.

From the first post, I can identify every cap except the 3300uF 10V, 4700uF 10V, one 3300uF 16V, and the 1000uF 10V. I assume that those are the four caps that I could not identify. Unfortunately, the image in that post has been deleted, but I remember seeing this thread a long time ago and the PSU in that image was identical.
If anyone has one of these PSUs, can you confirm that the short, fat cap next to the secondary heatsink (not shown in the pictures above) is the 1000uF 10V?

[lti]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

It appears that the cap next to the heatsink is the 1000uF 10V. Look at image 4 in this post:
https://www.badcaps.net/forum/showpo...2&postcount=75
In my PSU, only one cap is visibly bad (the bulging one next to the heatsink). I guess Asiacon isn't that bad.
Strangely, I did not see the small cap in the group of large caps that you can see in that post and the picture on the first page of this thread.
Also, note where the thermistor is located in my PSU and the one pictured in the post above. This is probably why the cap failed.
Finally, this is the second Hipro PSU I've seen where the thermistor was not touching the heatsink.

[PCBONEZ]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

PSUs have revisions and they will vary slightly from one to the next.
.

[lti]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

Yes, but I can see that the small cap next to the heatsink has a capacitance value that ends in two zeros.
Anyway, I'm going to buy replacements for the large caps from Digi-Key. Is this a close enough replacement for the 3300uF 10V?
http://search.digikey.com/scripts/Dk...name=P12345-ND
I'm also thinking of using this for the 1000uF 10V:
http://search.digikey.com/scripts/Dk...name=P10224-ND
I want to move this cap slightly away from the heatsink since the original is almost touching the heatsink, so the slightly lower ESR will compensate for longer leads.

[lti]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

I just looked at the pictre I took, and the small cap is actually there. It looks like a 1000uF 16V, based on the other pictures.
I'm starting to think that I should just do a partial recap to save money. I'm up to $11 in caps for an eight-year-old computer, and I still have lots to order if I'm going to fully recap the PSU.

[PCBONEZ]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

Personally I would look for a used Earthwatts on eBay.
Usually the 500w goes for less than a 380w or 430w and it's not too unusual to get one for under $30.
I say this partly because a swap would be less down time for you parent's PC than a re-cap.
.

[lti]

Re: caps on Dell 250 watt power supply Hipro hp-p2507fwp or HP-p2507f3cp

If a new PSU costs $30, then I'll just recap the old one. There are other computers that they can use. Also, this case does not have a full PSU cutout, so unless I buy a nearly identical PSU I will have to modify the case.
While I'm recapping it, I'll shorten the leads on the thermistor so it won't pop out of its holder again.
The moherboard needs recapped as well, so I can do both at once.

Also, will Nichicon VZ work for the cap next to the purple wire? Its specs match the original.
Finally, I'm concerned about the tiny caps around the IC in the corner. Do these need to be replaced, considering that the fan has probably not worked properly since the PSU was new?