17 Jan
2006
17 Jan
'06
1:15 a.m.
On Jan 17 2006, 9:29, Gooijen, Henk wrote:
Thanks for that remark, Pete!
I did not want to go into "pedantic" mode, but I was indeed
thinking about the capacitors in the EMI filter, but thought
that chances are very slim that they fail. But they can!
Once in ten years is good, except if it's *your* filter that
fails :-)
It was one of the big sealed metal can filters. I didn't think I'd be
able to open it up and repair it without a blowtorch and excessive heat
so I just replaced it. I don't know exactly what failed inside, but no
power reached the rest of the box, so perhaps not a capacitor. The
modern replacement filter was somewhat smaller and lighter, I recall.
Having the Y-class suppressor caps blow up in input filters is a common
failure mode in some SMPSUs, notable the ones used in BBC Micros.
Several people have reported this on the BBC mailing list in the last
year or two.
--
Pete Peter Turnbull
Network Manager
University of York