Hello,

Not sure if this is the best group for this. I found several articles
on the process of using an ATX power supply and convert it to a bench
supply. The problem I am having is that the wire color codes and pin
outs are not standard ATX. I looked several places, including this
website, to see if I could find out what the pin outs would be.

It is a LiteOn 140W PSU with +/-5V, +/-12V, +18V, and +5V standby
(underside of the PSU). I actually had to open it to see what wires
were what voltage. The board actually has them listed as:

6 Red: +5V
5 Black: Ground
1 White: +18V
1 Yellow: -12V
1 Purple: -5V
1 Grey: PG, I am guessing 'Power Good'
1 Orange: +12V
2 Brown: P/C and F/C (not sure what these are supposed to be)

The pinouts from 1 to 20 a

Red
Black
Red
Black
Grey
Red
Orange
Yellow
BLANK
White
Brown
Black
Black
Black
Purple
Red
Red
Red
Brown
BLANK

Any ideas? I am out of them. Thanks in advance.

On Apr 2, 1:11 am, Lionel wrote:


Um. What's your actual question? Your colour coding looks correct at a
glance, so you know which voltages should be on which wires. As you
guessed, PG = "power good", so all you need to do it short the grey
wire to a black wire (you can use a 1K resistor if you're feeling
paranoid), & the it'll power up just fine. I have a couple of PC PSUs
set up the same way on my own bench.

--
W "Some people are alive only because it is illegal to kill them."
. | ,. w ,
\|/ \|/ Perna condita delenda est
---^----^---------------------------------------------------------------- Hide quoted text -

- Show quoted text -

I guess it is ok; however, every single site I go to does not show
this pin out or color coding for an ATX power supply. Real quick,
Blue is -12V on every site that I have seen...among others.

The question I really wanted to ask concerned the brown wires. Not
sure what they are supposed to be. The board says P/C and F/C. If
shorting the grey wire to ground is all I need to do, I will set that
up and just measure them with a Fluke.

On 1 Apr 2007 21:24:54 -0700, "Kingcosmos"
put finger to keyboard and composed:

Hello,

Not sure if this is the best group for this. I found several articles
on the process of using an ATX power supply and convert it to a bench
supply. The problem I am having is that the wire color codes and pin
outs are not standard ATX. I looked several places, including this
website, to see if I could find out what the pin outs would be.

It is a LiteOn 140W PSU with +/-5V, +/-12V, +18V, and +5V standby
(underside of the PSU). I actually had to open it to see what wires
were what voltage. The board actually has them listed as:

6 Red: +5V
5 Black: Ground
1 White: +18V

+18V is not a standard ATX voltage. Furthermore, the LiteOn has no
+3.3V rail. Could this supply be for an industrial PC ???

1 Yellow: -12V
1 Purple: -5V
1 Grey: PG, I am guessing 'Power Good'
1 Orange: +12V
2 Brown: P/C and F/C (not sure what these are supposed to be)

Power/Control ??? Fan/Control ???

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Success!

The grey wire appears to be power good so that should be an output. I
connected the only +5V coming up (which I think is the standby
voltage) to the brown wire P/C (I agree-- power control), and the rest
of the rails came up.

Everything looks good. Still not sure about what the supply actually
is.

On 3 Apr 2007 18:00:14 -0700, "Kingcosmos"
put finger to keyboard and composed:

Success!

The grey wire appears to be power good so that should be an output. I
connected the only +5V coming up (which I think is the standby
voltage) to the brown wire P/C (I agree-- power control), and the rest
of the rails came up.

In a regular ATX PSU, the PS_ON pin is shorted to ground to turn on
the supply.

Everything looks good. Still not sure about what the supply actually
is.

Could the 1-wire 18V rail be for an LCD panel or touch screen ???
Point of Sale system ???

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

On Tue, 03 Apr 2007 17:31:31 -0400 Meat Plow wrote
in Message id: :

A 140 watt supply in an industrial PC?

Sure! We ship industrial nema-4 systems with even less power. 50-80 watt
power supplies and mobile processors.