6 Oct
1997
6 Oct
'97
5:34 a.m.
Tony Duell wrote:
I think: those XT power supplies in PC and XT series uses single
power transistor which is not used after the dual transistors type
since the AT power supplies, and it's not changed much since even in
clone ones as well.
Also, judge when cost is too much to fix when you can retrofit a
superior better quality power supplies out of PS/2 style PSU into the
orignal power supple shells, the fans IBM used is way out high
quality. Usually 10 percent out of dud power supplies I repair are
non-startable even after I find all the duds. Dunno why.
Having diffculty ordering the Bob's ESR meter because of being a
Canadian. Any suggestions?
Jason D.
On Sun, 5 Oct 1997, Marvin wrote:
I just checked and it may have been that the Professional monitor PS was the
one I used. From what I can remember (8 - 10 years ago), I had several IBM
power supplies that needed to be fixed and I searched through my tech refs
for a schematic. The one I found had an identical (or almost identical)
front end (before the transformer) and that gave me enough info to fix the
things.
Take a look at the IBM tech reference manual as
one of them (don't
recall
which one, XT?) does has schematics for theirs.
Also as far as trying
to
Are you sure? _None_ of my IBM TechRefs (I have : PC, XT, AT (2 vols), O&A
(2 vols), Scientific, EGA, PC-jr) have any PSU schematics at all. Well,
the PC-jr PSU card is there, as is the schematic of the professional
monitor PSU (the CGA monitor PSU is missing...).