Re: Good capacitors
- From: "Michael A. Terrell" <mike.terrell@xxxxxxxxxxxxx>
- Date: Mon, 06 Mar 2006 15:38:34 GMT
"stickyfox@xxxxxxxxx" wrote:
I know a while back there was a thread about replacing computer
motherboard caps; I noticed in CompUSA the other day that they were
promoting some new motherboards with "premium quality Japanese
capacitors." It sounds like baloney, but apparently quite a few posters
here have revived dead mobos just by replacing the power supply caps.
They were manufactured with defective electrolyte. It broke down an
the ESR went up, causing the capacitors to heat up and swell, or break
open at the vents. This caused the CPU power supply to shut down. If
the board was cleaned up before the electrolyte damaged the PCB, you
could get away with just removing all of the capacitors in the CPU power
supply, a careful cleaning, then installing the new capacitors. This is
where an ESR meter comes in handy. The lower the ESR, the better the
electrolytic. You can compare an old one with a new one and decide if
it needs replaced, and you don't even have to remove the old one from
the circuit, first.
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida
.
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