Opening a DECserver 90M External PSU
robert.jarratt at ntlworld.com
Sun Oct 18 11:59:34 CDT 2015
> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Peter
> Sent: 16 October 2015 23:45
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: RE: Opening a DECserver 90M External PSU
> > Thanks very much for this. Interesting that there is a fuse inside.
> > You would think the casing would be designed to allow the fuse to be
> > replaced somehow.
> That's not the original fuse either. I managed to blow that one when I
> trying to find the original problem with the PSU. I was having a really
> and I somehow managed to clip the scope ground lead onto the negative end
> the rectified mains smoother instead of the negative of one of the output
> The original fuse had wire ended caps pressed on to it and I was unable to
> them off so I ended up soldering loops of wire around the replacement fuse
> It looks like the case was originally designed to be held together with a
> screw. Perhaps it was later decided that this was insufficient to keep it
> coming apart and exposing dangerous voltages if dropped from a height and
> was decided to glue it together instead?
> I can sort of see why it might not be a priority to make the fuse
> Firstly, someone might try to replace it with a 13A plug fuse. Secondly,
> fuse did blow, there would likely be other components damaged. Sadly, it
> might be cheaper to get a replacement unit from stock than to pay someone
> capable of repairing it properly and ensuring it's safety afterwards.
> Peter Coghlan.
I had another go today, but I fail to see how you managed to pry this thing
apart without causing much more damage than appears in your photo. What kind
of tool did you use?
More information about the cctalk