hp ms-7254 and sanyo cap replacement suggestion

[bfordz]

I've got 6 Sanyo 16v 1000uf WF S.E.6D 105 c, 8x20 esr = .012 ripple = 2200 (assuming WF series) caps that are bulging w/1 leaking.

I'm trying to find replacements but I'm having trouble using those spec's.

Can someone make a suggestion for replacements?

[bfordz]

Re: hp ms-7254 and sanyo cap replacement suggestion

Maybe I'm reading the spec's all wrong and that's my problem?
esr = 0.012 ohms = 1.2 mOhms ?
ripple = 2200 mA = 2.2 A ?

If that's correct, when I use those spec's with 16v and 1000uF at 8x20; I'm not finding any matches.

I'm looking at Digikey for these if that makes a difference.

[cheapie]

Re: hp ms-7254 and sanyo cap replacement suggestion

esr = 0.012 ohms = 1.2 mOhms ?

0.012 ohms is 12 milliohms, not 1.2.

[bfordz]

Re: hp ms-7254 and sanyo cap replacement suggestion

Thank You cheapie!
I knew I must have been doing something wrong!
I converted to MOhm instead of mOhm

I still can't find a replacement.

[cheapie]

Re: hp ms-7254 and sanyo cap replacement suggestion

I converted to MOhm instead of mOhm

Not like it matters anymore, but you had converted to cOhm (centiohms). MOhm (megaohms) would be 0.000012.

I found Nichicon LG series, which is polymer, has specs comparable to the current capacitors (i.e. should work, but no guarantee). It is slightly wider than the current capacitors.
It has dimensions of 10x13 mm, ESR of 11 mOhms, and max ripple of 5600 mA. The ESR is close enough, the ripple, being a maximum, is not an issue, the voltage is the same, and the capacitance should be close enough. The only problem I can see would be the width.

I have attached the datasheet.

[Uranium-235]

Re: hp ms-7254 and sanyo cap replacement suggestion

thats a rare sight, bloated sanyos. I wonder if the PSU is sending some crappy voltage to this MB

[bfordz]

Re: hp ms-7254 and sanyo cap replacement suggestion

cheapie,

Thanks for all your help; I appreciate the ohm reading lesson...I knew I felt burned out the last couple of days but didn't think it was that bad

While you were looking I also found a nichicon poly but I was wondering about the spec's, the capacitance is lower;
Nichicon NE; 16v 470uF, esr = 12 mOhm, ripple = 5000 mA but there 8x11.5 which would fit the spot better. There are four caps in two groups right next to each other, not sure if 10's would fit.

Uranium,

The PSU is a bestec; voltage reads: 5.06 11.95 3.33; although I was blaming my original issue, a failed HDD, on our recent power brown out/ failures. We lose power for 2-10 seconds on occasions, which doesn't help me any.

I only noticed the failed caps when I went to check out the HDD plus it seems to be running slow with issues with the dvd drive also.

[cheapie]

Re: hp ms-7254 and sanyo cap replacement suggestion

While you were looking I also found a nichicon poly but I was wondering about the spec's, the capacitance is lower;
Nichicon FP; 16v 470uF, esr = 12 mOhm, ripple = 5000 mA but there 8x11.5 which would fit the spot better. There are four caps in two groups right next to each other, not sure if 10's would fit.

That's quite a bit lower... Usually, when polymodding, it's OK to lower capacitance as ESR goes down as well, but the current ESR is so low that it doesn't have much room to decrease. It might work, though, but the VRMs might not like the lower filtering. I'd say it's probably a 60-80% chance of that working. You might be able to fit the 10mm caps with some creative lead-bending. Also, you don't have to use polies, it's just hard to find lytics with only 12 mOhm (or less) ESR.

The PSU is a bestec; voltage reads: 5.06 11.95 3.33

Bestec isn't very good. They probably used cheap capacitors (they like Jamicon) that dried out and aren't filtering properly any more. That's probably why the caps on your motherboard died - they were doing almost all of the filtering.

We lose power for 2-10 seconds on occasions, which doesn't help me any.

Ever considered a UPS?

[bfordz]

Re: hp ms-7254 and sanyo cap replacement suggestion

Again, thanks cheapie,

tomorrow's another day...I'll probably order the poly's you found, there's only 4 caps with a tight fit.

I'm also going to find a different PSU, I opened it an there's one bad cap and it's buried under a lot of glue (fix that later).

These are business boxes and just so happens to be the payrole clerks pc; yikes! no pressure there to get it back up and running

As far as UPS's go, I've got one The company would rather deal with the individual outage than prevent it with up front costs

[Calchaqui]

Re: hp ms-7254 and sanyo cap replacement suggestion

All the Sanyos bloated are input caps, i think your PSU is a killer, take some multimeter measurements on that 12v rail