Antec 303XP question

I just bought an Antec 303XP power supply off of ebay and I have a few
questions (that google couldn't answer). First, the "manual" claims it has
a 3 pin fan connector that my power supply is missing. Second, it claims
to have a main on/off switch that my power supply is missing. It has
serial numbers and other "official looking" stickers on it that don't
appear to have been tampered with. I did a brief test (with a paperclip)
and the supply does receive power, but it won't power my board (unknown
that came with a Dell XPS H266 back in 1997). So, I guess my question is
this...did I get ripped off here? Or does anyone know why it won't run my
board? All connectors are attached to the board except for the 4 pin 12V
connector (that the "manual" says is not required).

Thanks for your help
Carson

On Thu, 11 Mar 2004 02:10:38 GMT, Carson Saunders
<carson_saunders_NOSPAM RemoveThis @yahoo.com> wrote:

 >I just bought an Antec 303XP power supply off of ebay and I have a few
 >questions (that google couldn't answer). First, the "manual" claims it has
 >a 3 pin fan connector that my power supply is missing. Second, it claims
 >to have a main on/off switch that my power supply is missing. It has
 >serial numbers and other "official looking" stickers on it that don't
 >appear to have been tampered with. I did a brief test (with a paperclip)
 >and the supply does receive power, but it won't power my board (unknown
 >that came with a Dell XPS H266 back in 1997). So, I guess my question is
 >this...did I get ripped off here? Or does anyone know why it won't run my
 >board? All connectors are attached to the board except for the 4 pin 12V
 >connector (that the "manual" says is not required).
 >
 >Thanks for your help
 >Carson

It doesn't. Are you sure it was the correct manual? Perhaps the last
revisions had it and the manual was updated, but i'm sure those models I
had, didn't have the connector.

Mine didn't have the on/off switch either.

Your Dell most likley uses a proprietary power supply that has same
physical dimensions of case and connector but is electrically,
pin-incompatible. That was a REALLY poor judgement on Dell's part.

I don't recall, but your board might now be dead.

Here's what I believe to be the correct pinout for the original Dell power
supply and motherboard 20-pin atx-like connector:

Pin Voltage Color
--- -------- ------
1 5 Red
2 Gnd Black
3 5 Red
4 Gnd Black
5 PwrGood Grey or Orange
6 5VSB/FP Purple
7 12 Yellow
8 -12 Blue
9 Gnd Black
10 Gnd Black
11 PS-On Brown or Grey
12 Gnd Black
13 Gnd Black
14 Gnd Black
15 -5 White
16 5 Red
17 5 Red
18 5 Red
19 5V sense Brown?
20 5 Red



Then there's the 6-pin (blade) aux. motherboard connector similar to an AT
PSU connector. I don't recall if Dell's boards always used it too or not,
but I suspect so since it's the only way the pinout I'm providing would
supply 3.3V power.

Pin Voltage Color
---- --------- -------
1 Gnd Black
2 Gnd Black
3 Gnd Black
4 3.3 Orange or Blue w/white stripe
5 3.3 Orange or Blue w/white stripe
6 3.3 Orange or Blue w/white stripe

There are sources for an adapter cable, which would be cheaper than
purchasing a Dell PSU and eating the loss or reselling effort for the
Antec.

I"m not "sure" who still has them but a couple of places that did, IIRC,
are:

<a style='text-decoration: underline;' href="http://www.centrix-intl.com/" target="_blank">http://www.centrix-intl.com/</a>
<a style='text-decoration: underline;' href="http://www.directron.com/" target="_blank">http://www.directron.com/</a><!-- ~MESSAGE_AFTER~ -->