Opening a DECserver 90M External PSU

[Robert Jarratt]

> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of tony
duell
> Sent: 18 October 2015 18:36
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: RE: Opening a DECserver 90M External PSU
> 
> 
> 
> > > 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?
> >
> > My usual technique to deal with these sort of brick and wall-wart PSUs
> > that are glued together is to carefully squeeze their plastic sides in
> > a small padded vise to break the glue joint. With practice, you can
> > split
> 
> If possible you want to squeeze the 'inner member' of the joint. So what I
do is
> put the jaws of the vice just to one side of the seam and squeeze, and if
that
> doesn't help then turn the whole thing over and sqeeze on the other side
of the
> seam.
> 
> > one of these open with little to no damage. Don't be tempted to use a
> > mallet as you could with really old linear transformer wall-warts
though.
> > The g-forces generated by a mallet will break components off of a pc
> > board in a switchmode PSU.
> 
> Or the other old trick for linear PSU bricks (again, don't try it with
SMPSUs)
> -- hold the cables about 2' from the unit and swing it round so that it
hits the
> bench or floor. That often cracks them open with suprisingly little
damage.
> 
> Oh for the days when we had screws holding such things together!
> 
> -tony
> =

Great idea to use a vice, never thought of that. Will give it a go.

Thanks

Rob