> -----Original Message----- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Peter > Coghlan > Sent: 15 October 2015 23:47 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: Opening a DECserver 90M External PSU > > Back in April, I wrote: > > Robert Jarratt wrote: > > > > > > One of my DECserver 90M PSUs got dropped and stopped working as a > > > result, possibly because it got pulled by the cable. That sounds > > > like the kind of damage that might be repairable. I tried to open > > > the enclosure and I found a hole under one of the labels, expecting it to be > a screw hole, but it isn't. > > > I am guessing you just have to pry the halves apart, but without > > > knowing where the clips are inside it is easy just to break the thing. > > > > > > > > > > > > Does anyone know how you open these PSUs? > > > > > > > As far as I recall, there are no clips - it is glued all the way around. > > > > Mine (actaully a 90TL, with H7082-AB PSU) failed too. Using a lot of > > patience, I pried it open without too much damage, fixed it (a > > capacitor in the startup circuit IIRC) and glued it back together. > > The end result was only slightly rough looking and would probably have been > better with a more suitable glue. > > The thing has a very Lego-like quality about it. > > > > It failed again some time later and I haven't had the enthusiasm to > > break it open again since. > > > > I finally worked up the enthusiasm. It was easy to open this time as the glue I > used to put it back together last time was not so good. While I was measuring > voltages on the input side, out of the corner of my eye I noticed the LEDs on the > front of the terminal server lighting up briefly. I found that I could get them to > light up consistently by pressing a meter probe on one of the legs of the > chopper transformer and after deploying the magnifying glass, I found a tiny > crack in the print leading to it. > > That was a lot easier than I thought it was going to be. I hope it lasts a bit > longer this time though. > > Now I find that the privileged password is not what I thought it is... > > Regards, > Peter Coghlan.
I tried to pry mine open, but it seemed that if I kept going I would end up damaging it more than I would like. Do you have a picture of the opened casing I could see? That would help me to see how best to open it. Thanks Rob
