AC'97 non-default pin?

[thallescard]

Hello all!

This is my first post here, sorry if i post in wrong area, also i'm Brazilian.

I sell computer accessories, and i have sold about to 30 computer cases with ac'97 audio on front panel for a computer builder company.

Now they are having a problem with the sound, and they are asking me what pattern is used on the computer case, because it seems to not follow default Front Panel I/O Connectivity Design Guide from intel (you can see at: http://www.formfactors.org/developer\specs\A2928604-005.pdf).

this is the case connectors:




The connectors uses a wire jumping pin 6 to 5 and jumping pin 9 to 10, but, doing a research over the internet, i can see that many computer cases uses this pin pattern, i found many images.

Most of times, this scheme are used along with HD audio connectors, as a secondary option for non HD audio motherboards (like images below). but i still don't have any reference to this pin scheme.

Someone have any idea how i can answer them about the pin usage, i need a trustworthy reference, they think this is a non-default scheme and are willing to send back the computer cases to me


Thanks all and sorry for my english.

 

[mfenn]

First off, why the hell are they using AC'97 instead of HD Audio? Are the selling Pentium 3's or something???

Anyway, I would imagine that you'll need to sacrifice a case in the name of science. Open up the outer heatshrink and trace the wires back to the headphone and mic jacks.

 

[Zap]

If you are using motherboards made in the past few years, then you need to be using the HD Audio/Azalia plug instead of AC'97. I haven't had AC'97 on my motherboards since... years. Maybe early socket 939? Try having them use the newer plug and see if it works.