Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
In article <ERupc.1643$SZ4.441@newsread2.news.pas.earthlink.net>,
"Jonathan Sachs" <abuse@no.where> wrote:
> Further adventures...
>
> I found a FAQ on the Antec web site which puts a different spin on the
> problem. They say that different motherboard manufacturers use different
> pin-outs for the Intel front panel audio, so some of their cases provide
> seven individual pin connectors rather than a single header.
>
> I got a single header on mine, so that doesn't do me any good. Before I
> contact Antec I want to understand the situation completely, and that is
> proving difficult. Their party line implies that there IS no standard
> pin-out, so it would be pointless to take them to task for not conforming to
> it.
>
> I have found several "answer man" web sites which refer to
> www.frontx.com/cpx110.html for the standard pin-out. The multiple references
> make it credible to me, but it would have no authority in a debate with
> Antec. It's just some information fromanother vendor with a front-panel
> product, and if Antec says it's wrong, I have nothing to reply with.
>
> Intel's web site search function is so brain-damaged that I can't find any
> useful information with it. I can't even find out which of their own
> motherboards has this header, so that I can look up the technical
> specifications and cite them as a de facto standard.
>
> Paul, do know any sources that will be useful for me?
There is a standard. Pg.20 gives the pinout. Same pinout as
Asus motherboard headers (at least the modern motherboards).
http://www.formfactors.org/developer/specs/fpio_design_guideline.pdf
If the cabling in the Antec case consists of a 2x5 plastic
shroud, with the wires and pins housed inside it, look for a
plastic release tab for each pin on the side of the shroud. It
holds the pin in place, and the pin can be dislodged by prying
on the tab with a hobby knife (xacto knife). The figure at the
bottom of this page demonstrates how to do it.
http://frontx.com/head_con.html
I hope the wires are color coded and you have some info from Antec
as to which color corresponds to which function, because you'll
need that to move the pins from their current position to a new
position.
All I can tell you, is there was an Antec FAQ which was basically
switching the function of the MIC2 and MIC_BIAS pins. Since in that
case the wires were separate, and each one had text printed on the
plastic at the end of the wire, the implication was that they
mislabelled the two pins.
In the end, this is where you want the signals from the motherboard
to go. MIC2 from the motherboard header should end up contacting
the Tip contact. MIC_BIAS (a.k.a MICPWR) goes to the Ring contact.
The Sleeve contact goes to ground (GND).
"MIC Input Characteristics"
http://www.a-tech.net/SoundCards/CT4811.htm
/ \
MIC2 ------| |
\ /
+===+
MICPWR -----| | 3.5mm plug
|===| to soundcard
| |
GND -------| |
| |
+=======+
| |
If you buy a 3.5mm (1/8") plug from Radio Shack, you can
plug that into the case and gain access to the contacts.
You can then use an ohmmeter, to verify the names of the
above wires.
I own a couple of Antec cases, and strongly recommend checking
the pinout of the connectors with an ohmmeter. On one case,
the Firewire data connections are reversed. The Firewire and
USB connectors have their grounds wired together inside
the case. Antec just isn't that swift when it comes to wiring.
(I do like their cases and power supplies, despite this.)
HTH,
Paul
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