17 Jul
2015
17 Jul
'15
11:31 a.m.
It is generally a good idea to re-form electrolytic
capacitors in power
supplies, and to bench check the power supplies (under some kind of
load) before actually applying power to the whole unit.
I am not sure either would have done much good here. The OP said it
ran OK for an hour or so, when you test a PSU on dummy load you
typically do it for a lot less time than that, Incidentally, DEC PSUs
of this type run fine with no load in my experience
Also I have found the capacitors in these units to be very reliable. They
can fail, of course, but virtually all the DEC bricks I have are on their
original capacitors. I think I've replaced more chopper transistors than
capacitors in these.
-tony