Network Switch 24 Port PSU Bad Nichicon Cap

[voithkingsley]

Hiya Ladies and Gentlemen,

I've seen this thread over here from December 2008 where this guy has a identical piece of network equipment to me. (PureLan 24TP Plus 1 Fiber Network Switch)
I have two of them, and they with seem to have bad cap's on the PSU's.

Thing is, I seem to have a different Nichicon capacitor "model" to what he had.

The affected caps are Nichicon 1500чF 6.3v HD (M) and have 105° written on them. Even after many hours of searching the internet and reading the old threads on here, I'm still confused as what would be a suitable replacement for them.
I've seen a lot of people say that these model of caps don't need to be replaced and are generally fine, but these are quite obviously venting a blugging.
I'm in the UK but don't really mind where I replacements caps come from, I would prefer to buy them over the internet but whatever gets the PSU's up and running again

Thanks for any feedback or help provided guys

Link To Old Thread

[mockingbird]

Re: Network Switch 24 Port PSU Bad Nichicon Cap

For Nichicon HD use Panasonic FM (FR is also acceptable) or better, Rubycon ZL (ZLH, ZLK, ZLJ) or better, and UCC KZE or better.

The affected caps are Nichicon 1500чF

Not to nitpick but you used the wrong symbol for 'micro'. The character you used is a Cyrillic "Tz" (i.e. it produces the sound resembling combining t and z in English). The one you wanted was this: µ

[voithkingsley]

Re: Network Switch 24 Port PSU Bad Nichicon Cap

For Nichicon HD use Panasonic FM (FR is also acceptable) or better, Rubycon ZL (ZLH, ZLK, ZLJ) or better, and UCC KZE or better.

Not to nitpick but you used the wrong symbol for 'micro'. The character you used is a Cyrillic "Tz" (i.e. it produces the sound resembling combining t and z in English). The one you wanted was this: µ

Thank you for that information.
What about the tolerance? If I'm correct the "M" is part of the series name not the tolerance?

I never realised there was two similar characters, µ and ч ... My apologies!
Now I know

[PeteS in CA]

Re: Network Switch 24 Port PSU Bad Nichicon Cap

The "(M)" is the tolerance, and it means +/-20%.

M = 20%
K = 10%
J = 5%
G = 2%
F = 1%
B = 0.1%

I know some parts can have 0.5% and 0.05% tolerance, I just haven't seen the letter codes for those tolerances.

[Behemot]

Re: Network Switch 24 Port PSU Bad Nichicon Cap

Is the datecode somewhen between 2001 and 2004 on the bad one?

[c_hegge]

Re: Network Switch 24 Port PSU Bad Nichicon Cap

^
It's HD, not HM or HN. The HD series was never affected, so my guess is that the device killed it.

[Behemot]

Re: Network Switch 24 Port PSU Bad Nichicon Cap

I think they were all three affected…at least something tells me I have seen them fail in conditions where they should not (Intel MoBos).