XT Power Supply help... - test-drb@ccmp.vtda.org

30 Apr 1998

 I've never seen an 80W power supply. All original IBM 5150 PC's I 
 worked on had a 63W power supply and the IBM XT's all had a 130W power 
 supply. You mentioned your supply has a 220V selection? If so and you 
 are stateside, make certain it is in the 110V position. If you have a 
 220V power supply that doesn't have a 110V selection and you're 
 stateside... you're out of luck. I concur with all those previous 
 respondents that this supply of yours is most likely good but loaded 
 down either by excessive loading (more cards/memory/drives than the 
 P/S can service) or a short circuit in one of the add-on boards or 
 drives. Just unload until you find the cause.

 Marty

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_________________________________
Subject: Re: XT Power Supply help...
Author:  classiccmp(a)u.washington.edu at internet
Date:    4/29/98 11:34 PM

 That's odd.  My power supply's 130W.  It's also the 220v variety, as
that's 
 what's available here.  It was made in Dublin, Ireland.  It really looks 
 like it was how it was made, as it looks REALLY built-in to the case. 
 Anyway, I can't see any reason that it would be dememanding too much power, 
 all I have connected is a XT clone motherboard, (however, it WAS sitting in 
 an XT case) and a XT floppy drive connected.  So, any ideas?  I think that 
 it was just this PS's time to go.... and it was two weeks one day older than 
 I am!
 Thanks for the help.  I might need a new PSU, as I'm not good at this
 type of thing.  After testing it with a dummy load, just a HDD, and a FDD 
 (one at a time), and rechecking all my power connections, I think that it 
 REALLY is dead.
 Thanks,

 Tim D. Hotze
 -----Original Message-----
 From: SUPRDAVE &lt;SUPRDAVE(a)aol.com&gt;
 To: Discussion re-collecting of classic computers 
 &lt;classiccmp(a)u.washington.edu&gt;
 Date: Thursday, April 30, 1998 5:06 AM 
 Subject: Re: XT Power Supply help...

...
 In a message dated 98-04-29 16:12:26 EDT, you write: 

<< > >> Hi.  After getting a new M Board for my XT and a load of cards, I 
found
 > >>that
 > >> my Power Supply's now completely dead.  So, where to I start?  No 
 fan,
...
   >moves
> a turn or two, I know that the power connections good.  
 Could you simply be overloading it? >> as long as its an xt power supply and
not one from a 5150 pc, there should   be
...
 no problems. the 5150 was only 63watts, which was good
for maybe floppy 
drives. the xt has an ~80 watt power supply so there shouldnt be any danger   of
...
 overloading unless it was dodgy to begin with. ive a
loaded up xt and the 
power supply handles it just fine.

david  

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