> -----Original Message----- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Peter > Coghlan > 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 was > trying to find the original problem with the PSU. I was having a really bad day > and I somehow managed to clip the scope ground lead onto the negative end of > the rectified mains smoother instead of the negative of one of the output > smoothers. > The original fuse had wire ended caps pressed on to it and I was unable to get > them off so I ended up soldering loops of wire around the replacement fuse > instead. > > It looks like the case was originally designed to be held together with a single > screw. Perhaps it was later decided that this was insufficient to keep it from > coming apart and exposing dangerous voltages if dropped from a height and it > was decided to glue it together instead? > > I can sort of see why it might not be a priority to make the fuse replacable. > Firstly, someone might try to replace it with a 13A plug fuse. Secondly, if the > 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. > > Regards, > 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? Regards Rob
