30 Mar
2019
30 Mar
'19
12:25 p.m.
I have a PDP-11/23+ and the power supply (H786) "last ran when parked" a
year or so ago. But there's no DC output at all today, and the fans are
running so there is AC power...
I also have the original H7861 that came with it, which had a blown chopper
transistor. I couldn't find anything else bad, so I replaced the transistor
and within a few seconds of running, it blew again. :(
So I need some help - I've never been good at fixing switching supplies, not
to mention the high-side hazards.
The simplest solution would be just to replace it with a working unit.
Anyone got one to sell, hopefully cheap? :)
If not, can anyone fix one or both of mine?
thanks!
Charles