Re: Need advice for two non-working IIe/IIc monitors

["Michael J. Mahon" <mjmahon@aol.com>]

Toinet wrote:
> On the IIc monitor, I have been able to identify the (one?) faulty
> component on a small board: RIFA PME 271M 40/085/56 (0,1 uf X2)
>
> It is a "condensateur d'antiparasitage":
> http://www.abcelectronique.com/forum/archive/index.php/t-37045.html
>
> It seems easy to remove the "stuff" and replace it once identified and
> bought ;-)

Those capacitors are readily available--just be sure to get an X2-rated
capacitor, since it is connected directly across the AC line.

The purpose is to reduce supply-generated RFI and to protect the supply
from fast transients on the line.  If you have clean power, you can
operate the supply without it.

When it shorted, then "popped", it probably blew the fuse, though they
occasionally fail in a way that leaves the fuse intact.  In the latter
case, the device will continue to operate (but the capacitor residue
will smell very bad until it's cleaned out and aired out).

-michael

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