PCWorks: power supply

-----------
The computers with the power supplies that connect
to the motherboard with a single connector can be
shut down by a signal from the motherboard
created by the operating system.  I believe that
they can also be turned on by a signal from the
operating system.
--------------

That's an ATX power supply.  The one's with the two mobo 
connectors are "AT" power supplies with an
independent switch. 
All you need to switch (turn on/off) an ATX PS is a mobo for

one.  You just connect the power connector, then momentarily

short the (usually labeled) "PWR" pins in the mobo
front panel 
connector pin-outs. Sometimes it's labeled
"power", or 
"switch", etc.

Another way is there are also ATX PS testers for as low as
$10. 
It's not good to power up any PS for more than a few seconds

because there's no load on it.  A PS tester has a dummy load
it 
applies to the PS so it can remain on for a couple of
minutes 
or so, but no longer than that.

If this is a one-time thing only and you only want to see if
it 
powers up and you have no mobo, then on the main ATX to mobo

power connector you can short a ground (black wire) to the 
green (PS-ON) wire.
http://www.orpheuscomputing.com/downloads2/ATX-pinout.r
tf
-Clint

God Bless
Clint Hamilton, Owner
http://OrpheusComputing.c
om

----- Original Message ----- 
From: <whckmjuno.com>


The computers with the power supplies that connect
to the motherboard with a single connector can be
shut down by a signal from the motherboard
created by the operating system.  I believe that
they can also be turned on by a signal from the
operating system.

I want to test a power supply independent of the
mother board.  What type of signal is required
to turn the power supply on and keep it on?
On what line in the connector is the signal sent?
Some power supplies have a separate two wire
connector that might be used for this purpose.

Is there somewhere that I can download this
information?  Maybe in a PDF file that contains
schematics?

Wally
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