Will this recap work ?

[ReeceyBurger123]

So I brought a ibm eserver 225 off ebay it has a mixture of nichicon hm panny fj and ucc kzg, as I was looking aorund I saw that some of the caps were not soldered through the board but to the top copper pads on the surface, I was just wandering will this work or should I remove the board and resolder them ?
The server works fine btw.

[retiredcaps]

Re: Will this recap work ?

Someone may have done a repair job? If the date codes on the those capacitors that stand up are different from the others, then you have a good indication that someone did a repair job.

[Pentium4]

Re: Will this recap work ?

If it isn't too much trouble you might want to pull it and inspect the bung to make sure it's a legitimate Panasonic capacitor. I know Hermei uses Panasonic's vent stamp. It'll function like that, the ESR will just be a little bit higher

[ReeceyBurger123]

Re: Will this recap work ?

Hello thank you for the replies it is a genuine panasonic fj the bung is fine I bent over the cap and its good, so will the repair be fine ?

[Agent24]

Re: Will this recap work ?

It's not done properly, but it's not too bad either. I'd say it's fine though.

[ReeceyBurger123]

Re: Will this recap work ?

Ok thank you all

[Pentium4]

Re: Will this recap work ?

I've never seen panasonic fj in that color before

[ReeceyBurger123]

Re: Will this recap work ?

It all looks genuine I can take pictures if you want ?

[kc8adu]

Re: Will this recap work ?

+1

i've never seen panasonic fj in that color before

[goontron]

Re: Will this recap work ?

i've never seen panasonic fj in that color before

+2

[c_hegge]

Re: Will this recap work ?

Agreed. Either it's not an FJ, or someone has recapped it with fake caps. Real FJs are black with gold markings

[lti]

Re: Will this recap work ?

Panasonic M series (general purpose 85°C) uses that color scheme.

Also, having the caps raised off the board and soldered like that makes me think the board was damaged while removing the old caps and that was the only way they could get it to connect to the correct trace.

[ReeceyBurger123]

Re: Will this recap work ?

They appear to be genuine and I tested them with lcr meter at work and they seem perfectly in specification.
I re-soldered them all works fine.

[c_hegge]

Re: Will this recap work ?

Ah. It's an M series, not FJ. These are not suitable for use on a motherboard.

[ReeceyBurger123]

Re: Will this recap work ?

Ohh are they dam just put the board back in I will used nichicon hz thank you all.

[Agent24]

Re: Will this recap work ?

I tested them with lcr meter at work and they seem perfectly in specification.

That doesn't mean much. Even the worst-of-the-worst capacitors like Sacon FZ would measure OK when they came from the factory. Besides, an LCR meter won't generally test ESR which is more of a concern, especially on motherboards.

The real test is how long they last, and this won't be very long for low grade capacitors, fakes, or general purpose ones (even if they are high quality) when used in circuits where Low ESR is really needed.

[ReeceyBurger123]

Re: Will this recap work ?

That doesn't mean much. Even the worst-of-the-worst capacitors like Sacon FZ would measure OK when they came from the factory. Besides, an LCR meter won't generally test ESR which is more of a concern, especially on motherboards.

The real test is how long they last, and this won't be very long for low grade capacitors, fakes, or general purpose ones (even if they are high quality) when used in circuits where Low ESR is really needed.

I know but I have seen fake caps that claim to be a certain value and aren't, any way I will replacing them with nichicon hz as these aren't the correct esr.

[ReeceyBurger123]

Re: Will this recap work ?

Got around to recapping this board, used sanyo wx works fine had to keep one of the capacitors floating as there is a capacitor lead blocking the hole and I cant get it out with out ruining the trace so I had to keep that one floating but it works fine.
Pictures showing the new capacitors.

[Jonny Accelerant]

Re: Will this recap work ?

So I brought a ibm eserver 225 off ebay it has a mixture of nichicon hm panny fj and ucc kzg, as I was looking aorund I saw that some of the caps were not soldered through the board but to the top copper pads on the surface ...

I just read the whole thread. Seems like someone went to a lot of trouble to do a half-assed job? Did the one blocked lead whole cause the whole situation? I got the wrong caps part, and I don't really understand how a broken lead in the pc board is a permanent situation (desoldering iron?), but I still don't understand why they are setting those caps high off the motherboard like that as it seems to me that it would have been easier to solder them all the correct way on the back-side of the board, so at this point after reading the thread I'm "wtf?" and would appreciate a forensic analysis of how this motherboard came to this condition.

[diif]

Re: Will this recap work ?

Jonny, i've seen it before and even recommended on this forum. The person who originally recapped the board possibly didn't have a decent enough iron to remove the old caps. They are either cut or pulled of the board leaving the legs to solder to.