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Dimension board 47uF caps

 
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cubist



Joined: 20 Sep 2007
Posts: 246
Location: Cambridge, MA

PostPosted: Thu Sep 20, 2007 9:52 pm    Post subject: Dimension board 47uF caps Reply with quote

While working on this problem, I had my dimension board out for some air cleaning and general inspection. I noticed that there was some board discoloration around the 47uF caps scattered around. Looking more closely, the caps look a bit distorted with slightly bulging tops. I'll probably replace mine but others might want to look at theirs and check on conditions. I'd like to hear if anyone else finds any problems.
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pentium



Joined: 23 Jun 2006
Posts: 1138
Location: Kamloops, BC

PostPosted: Fri Sep 21, 2007 2:30 pm    Post subject: Reply with quote

Can you supply a photo?
This I must see.
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cubist



Joined: 20 Sep 2007
Posts: 246
Location: Cambridge, MA

PostPosted: Fri Sep 21, 2007 2:34 pm    Post subject: Will try but... Reply with quote

pentium wrote:
Can you supply a photo?
This I must see.


I don't really do digital photography so this will be a challenge even
beyond the fact that the discoloration is somewhat subtle (the bulging
is less so). I also looked at my spare Turbo board today and I see
some of the same problems with the 47uF caps there as well. I
looked at my even older non-Turbo '040 board and the 47uF caps
there show no signs of bulging and there's no board discoloration.
I should also mention that the non-47uF aluminum caps are good
on all boards.
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helf



Joined: 29 Dec 2005
Posts: 1097
Location: Alabama, USA

PostPosted: Sat Sep 22, 2007 10:59 am    Post subject: Reply with quote

It is probably similar looking to this, pentium.

http://www.burtonsys.com/bad_BP6/PA090008.JPG

I had a mobo where ALL the caps went bad...
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idylukewild



Joined: 28 Feb 2006
Posts: 121
Location: Baltimore, Maryland, U.S.A.

PostPosted: Sat Sep 22, 2007 12:05 pm    Post subject: Reply with quote

Thanks for the heads-up!

I've had my fill of failed
electrolytics in monitors,
now I know to be on the
lookout for them on Cube
boards!

Luke
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cubist



Joined: 20 Sep 2007
Posts: 246
Location: Cambridge, MA

PostPosted: Sat Sep 22, 2007 3:02 pm    Post subject: Not as bad... Reply with quote

helf wrote:
It is probably similar looking to this, pentium.


It's not as extreme as that or the other rounds of bad caps that have
come out of China. No electrolyte globs. But it doesn't look quite
normal, either.
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cubist



Joined: 20 Sep 2007
Posts: 246
Location: Cambridge, MA

PostPosted: Sun Sep 23, 2007 3:21 pm    Post subject: No photos yet... Reply with quote

Tried with my particularly nasty little throw-away camera and
absolutely no details came through. Really need a macro setup
for what I want to do...
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