20 Feb
2007
20 Feb
'07
6:40 p.m.
On 20/2/07 21:48, "Tony Duell" <ard at p850ug1.demon.co.uk> wrote:
Really odd.
My first thougth is that it is a mains filter capacitor that's breaking
down. Some of them are designed to be 'self healing' in that if the
dielectric breaks down, the current will then vapourise the metal in that
area, causing the capacitor to carry on working. Of course that was
before the days of those over-sensitive RCDs, etc.
I realyl would want to know exactly how it's tripping the mains. Perhaps
run it on a circuit that doesn't have an RCD.
I can't rememebr if this PSU uses separate filter capacitors (in which
case change them [1]), a mains filter module (I wonder if you can get the
same type still), or what.
[1] RS or Farnell sell them. Class X between live and neutral, class Y
between live or neutral and earth IIRC.
THat's an odd fault. It's repeatable,
yes? In other words you turn it on,
it runs for 5 minutes, then trips the mains. You cna then power it down,
power it up again and it'll run for another 5 minutes...
Yep. Every time. I haven't timed it exactly, but it will run for minutes
then give up; last night I had enough time to start playing with DCL and
leave it for a bit while I dug a manual out. Then everything went black :) The Pros (and
the 'Bow, and Decmate II) are all designed to come into
modules without tools. But be warned that setting up the machine out of
I know all about the 'bow and Decmate (wrt maintenance, dismantling etc) but