Re: v120 power supply pinout

On Mon, Aug 16, 2010 at 03:31:44AM -0700, Nick Schmalenberger wrote:
> Hi,
> I have a sunfire v120 with a digium tdm400p telephone interface
> card in it and it has a 4 pin molex power connector like for a
> hard drive for its fxs interface. The v120 doesn't have such a
> connector, but I think if the motherboard uses the standard atx
> pinout, I could splice the connector onto the extra wires from
> this kind of adapter
> http://www.newegg.com/Product/Product.aspx?Item=N82E16812200064 
> Does anybody know if the pinout is normal atx or if this would
> work at all? This
> http://arstechnica.com/phpbb/viewtopic.php?f=7&t=751964 says it
> is atx but I haven't been able to find any other information.
So, not all of the motherboard power connector wires for the v120
are the same as the atx colors, but for 12v, 5v, 3.3v, and ground
wires that the adapter I got takes for the extra pins on the 24
pin end, they are the same on the v120s power supply and the rest
of the adapter is straight through. I can also confirm that the
v120 does use the same connector as atx with all the round and
square parts in the same places. I think because of the v120s
power switch on the power supply itself and the other smaller
gauge power connector (is this for lom?) that maybe its not true
atx pinout (no green wire in the big connector either i think),
because it doesn't get turned on from lines in the big connector?

I made the adapter with the normal plug on the extra wires and
there was only 1 ground wire so I jumpered that to both positions
on the 4 pin plug. Because I didn't need the 3.3v line I cut off
some to use for the jumper and scotch taped the end to one of the
other 3.3v lines (luckily all the lines I did use were on one
side of the connector). Then I ran a 10" extension cable under
the cpu air duct and over to the pci card.

Here is a picture of it
http://www.schmalenberger.us/images/minafxspower.jpeg
I'm worried that stuffing it all in there will eventually hurt
something, it seemed to be slightly pushing on some of the
capacitors by the power connector on the motherboard but so far
it all seems to work. I didn't have a chance to put a multimeter
on the pins of the adapter either :(, I wish I had one with me,
but in lom it says the power supply and all the voltage rails are
ok. I hope this info might help somebody else trying to add a
device to the v120. If anybody has other suggestions about cable
routing that would be good to know also. Thanks for all the tips!
Nick Schmalenberger