How to rewire 24 pin ATX PSU for a shuttle XPC?

[Computer-DOC]

***************Update***********
I have now tried to re-wire my AXT 24 pin female to male adapter cable and unfortunately it doesn't work. When I plug in and press the on button I get a beep about every 8 seconds with the shuttles power light flashing on and off.

This is and updated diagram of how I have wired it up here:

http://i1292.photobucket.com/albums/b570/ComputerDOC1/shuttlerewire2_zpse8344db9.jpg

My first diagram wasn't done right as I numbered the pins wrongly.

I have tried wiring pin 3 of shuttle' s ATX 2 connector to pin 17 as well as 15 on the 24 pin AXT connector, as it is in the diagram. With the same results.

Do I need to do something with the pin 8 PWR_OK (grey) wire on the ATX24 pin connector?

**************Original posting**************



Hi folks,
I want to modify a PSU to drive my Shuttle XPC. Its an SB81P with a FB81 motherboard. I have an extension cable from Maplin which will plug onto one end of the ATX 24pin connector from the PSU (female to male) that cost £2.99 so I can cut that up instead of the PSU wires.

If I rewire the adapter cable I can use it on other PSU's too

I have checked the pin outs on the shuttle according to the motherboard manual (Page 38):

http://download.shuttle.eu/Archive_2004/Manuals/en/fb81/fb81en.zip

I have also done this little graphic as to how I might wire up the old connectors from the old shuttle PSU to a new 24 pin connector.

http://i1292.photobucket.com/albums/b570/ComputerDOC1/Shuttlere-wire_zpsdff249d3.jpg


This kind of thing isn't my area of experteise. I have never rewired a PSU like this before so I would like some advice on what to pay attention to, and how to wire it up properly so I don't release the magic smoke 🙂

So I will await your collective expert opinions.

Many thanks

Gareth

 

[Computer-DOC]

I have now got my shuttle to boot up and run fine!

I did this by connecting pin 16(green) and 17 (Black/Common) together. These are the two pins that you would put a jumper or paperclip across to make your PSU turn on when not connected to a motherboard. Obviously my PSU turns on when these two pins are jumpered and stays on.

So I plugged in the two connectors into the shuttle ATX1 and ATX2 again....Hit the power button on the shuttle and BING!!!! it posted!

The power button will shut down the shuttle in the normal way too.

However the problem now is that the power supply is on and running all the time now as soon as I turn on it's power using the switch on the back of it.

This isn't roo much of a biggie as its easy to turn of the PSU's power but it would be nicer if it worked as it should.

For example... shuttle off...PSU off... (but powered up, ready for a press of the on button on the shuttle).

What exactly does pressing the shuttle's ON button do anyway?

What in theory is supposed to happen in the shuttle PSU to make it come on??

If I knew that it might help solve this issue completely.

In fact there isn't much scope to do things diffrently as far as I can see.

I think the 12 volt and common wires are all connected together to the same point in the PSU anyway when I tested the continuity with a volt meter of the PSU's outputs...All the dffrent rails 12v,3.3V,5v, and GND were all connected so any of the same colour wires tested all made a circuit.

I just don't understand enought about the finer points of how this is supposed to work..So anymore suggestions would be great.

Here is an updated diagram of the state of the wiring now. The new connection between green(16) and black(17) is circled in RED

http://i1292.photobucket.com/albums/b570/ComputerDOC1/shuttlerewire5_zps1164aeca.jpg

 

[BrianBW]

Thanks a lot for sharing all the details of your work. I followed your method and got my shuttle boot up! But there is still a problem: when I installed windows 7, it would freeze randomly and frequently. What do you think might be the problem? I even tried to use two power supplies to make sure there is enough AMP, but still the same.

 

[Computer-DOC]

HI Brian,
I am surprised people are still reading this. I doubt if its a power supply problem. As long as there is enough juice to make it boot you should be fine. Perhaps if you have a beefy video card and it has it's own power sockets make sure you use them. I think a 350watt power supply would be marginal with a video card in this shuttle. Anything better would be fine I am sure.

It sounds like perhaps a hard disk problem, check carefully for that and also make sure you have the most current chipset drivers for the shuttle installed and also any other drivers you can find for it's bit and pieces for windows 7.

I doubt if its a power supply issue it sounds more like an operating system thing.

Good luck with it!

 

[pyraxiate]

Thanks for this. My backup computer ( q6600 / gtx 560 / 8gb ram ) just died. I wasn't looking forward to spending the 100 online for a new shuttle PSU. Going to give this a shot and report back

 

[GFBurke]

Thanks for the pinouts man.
Jamie. attf.