Re: Quiet Down PC Power Supply--Not a Fan Problem
- From: w_tom <w_tom1@xxxxxxx>
- Date: Wed, 29 Aug 2007 10:05:46 -0700
On Aug 28, 9:05 pm, "RD" <reddog...@xxxxxxxxxxx> wrote:
In fact, it is still doing a good job but has recently developed a high-pitched
whining noise. It is not the cooling fan. I opened up the supply, and the
noise seems to eminate from a section containing some good-sized
toroidal transformers. There are a couple of power transistors on large
heat sinks nearby as well, so I don't know which component is the
noise source. Anyone have any ideas on how to repair this problem?
After winding the torroid, we would put it into a vacuum, then bath
it is varnish. The varnish would be sucked into the coils so they did
not vibrate. To stop the vibration, you must do something equivlalent
deep inside the windings. IOW live with it. As usual, most failures
are manufacturing defects.
.
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