Will a PC ATX PSU fit a PWS 500?

[andy thomas]

The power supply in one of our PWS 500au's has failed. It looks pretty
much like a PC-style ATX PSU to me so would a good quality ATX PSU of at
least 400W rating be suitable as a replacement?

Andy

[David Turner, Island Computers]

Similar but wiring is completely different
FYi we have them for $189 + shipping

David
"andy thomas" <an...@ic.ac.uk> wrote in message
news:Pine.GSO.4.64.0907151115580.4781@anahata...

[andy thomas]

On Tue, 21 Jul 2009, David Turner, Island Computers wrote:

> Similar but wiring is completely different

Having checked this out, the wiring to the 20-pin ATX connector is
identical on both standard PC-style and DEC PSUs except for the colours of
some of the wires - ie, Digital used brown leads for the +3.3v supply
while the ATX standard is orange, and blue for +12v while ATX is mostly
yellow (with one blue lead on the ATX connector).

The only thing that is really different is the 10-pin auxiliary power
connector which supplies +3.3v and +5v to the mainboard, which has a
jumper link between the two pins furthest from pin 1. An adaptor could be
made to provide these feeds from the existing voltages available on the
other PSU cables to a similar 10-pin connector. As we have a lot of good
350W+ ATX PSUs taken from scrapped PCs, it would seem to be a good idea to
try this.

> FYi we have them for $189 + shipping

I'm in the UK and unfortunately, the management of this institution are
trying to get rid of Alphas which they neither understand nor support. So
I'm not in a position to actually spend anything on these systems, just to
keep them going as best as I can for those who prefer using them still.

Andy