gyoza on 13 Jul 2006 20:32:36 -0000


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Re: [PLUG] OT: SMD capacitor


That link doesn't work for me, but this one does: http://www.chemi-con.co.jp/Welcome_e.html


schwepes@netaxs.com wrote:
Looking at the EEM, the description and notation seems to be United Chemi-
con who does have a web site at www.chemi-con.com
bs

On Wed, 12 Jul 2006, Eric Hidle wrote:

Judging from the location, it doesn't look like a DC-DC output cap, but
rather a bulk supply cap for the graphics processor. The DC-DC
converters are nestled in that jungle of tin cans at the up-end of the
board. That said, it could very well be a tantalum... 16VDC is a pretty
high voltage for a solid polymer cap in that large a capacitance...

Anyway, check out AVX TPS series caps for a replacement... they're
probably available at digikey in onesies... perhaps a TPSD476M016
E



gyoza@comcast.net wrote:
Here are pictures of the capacitor.
http://reddragoncanoeclub.org/paul/9600/

The card is just to show the location and relative size of the cap.
The only difference is that my cap is black and my board is green.  heh.

I was assuming the cap is tantalum.


Eric Hidle wrote:
What package is the bad capacitor in and what chemistry was it?
Chances are it was a low-ESR polystyrene or aluminum-polymer cap, in
which case you do not want to replace it with just any off-the-shelf
tantalum or electrolytic capacitor. The DC-DC converters on video
cards are ultra-clean and depend upon a very low amount of resistance
in the output caps to minimize ripple.

Was this thing a round tin can?
E

gyoza@comcast.net wrote:
Nevermind.  heh.  I will try the radial capacitor.  (I found
#electronics on Freenode.net)

gyoza@comcast.net wrote:
I have a Radeon 9600 Pro video card with a bad surface mount
capacitor (C2).  I'm not sure of the value of it.  It's labeled
"47" and "16V" which I read as 47uF, 16V.  Does that sound
correct?  It is a black SMD capacitor with a white end to indicate
polarity.  The size is roughly 7mm x 3.5mm x 2mm.  I need to
identify it enough to replace it.  Would it be too wacky to use a
huge radial capacitor to replace it?
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