ukeXposed said:
Hello,
Hope someone can help - I have a new mobo, and the audio connectors on it
for the front panel audio are as follows:
1 AUD_MIC 2 AUD_GND
3 AUD_MIC_BIAS 4 AUD_VCC
5 AUD_FPOUT_R 6 AUD_RET_R
7 HP_ON 8 KEY
9 AUD_FPOUT_L 10 AUD_RET_L
But some of the cables in my new case do not match these - here are the
cables I have.
A. GND }
B. MIC IN } on one cable
C. RIN }
D. ROUT }
and
E. GND }
F. MIC IN } on the other cable
G. LIN }
H. LOUT }
Can anyone give me a list of what goes where?
So far I *guessed* at these:
5-D
6-C
9-H
10-G
Thanks,
D.
A Mic jack is shown here:
http://www.a-tech.net/SoundCards/CT4811.htm
Tip is Mic-In, Ring is Mic-Bias, Sleeve is ground. You are going to
have to experiment with the two Mic-In wires, to see which one is
connected to Ring, and which one is connected to Tip.
Since your LIN/LOUT and RIN/ROUT will have identified the
left and right channels for you, the only experiment you'll need
to do, is figure out what "IN" and "OUT" really mean. Connect
a headset to the headset jack on the case, then connect AUD_FPOUT_R
on the motherboard to each of the RIN/ROUT wires in turn. One of the
two will result in sound on the right side headphone. That will be the
correct connection. Connect the other wire of the pair to AUD_RET_R.
Repeat exercise for left channel.
As for the two grounds, I would first use my ohmmeter and connect
it to the two case GND wires, to see if they are connected together.
If they are, then only one of them needs to be coonected to GND on
the motherboard. If they are isolated from one another, then you may be
able to connect one of the case GND wires to the AUX-IN 1x4 connector
on the motherboard, as the two center pins of that connector are
usually GND. Check your mobo docs to see if you have a connector
like an AUX-IN and then check the pinout to be sure.
Here is some typical info for case jacks. The following doc shows
a jack that has return lines, suitable for muting the rear speaker
jack on the computer, when headphones are plugged in:
http://rocky.digikey.com/WebLib/CUI Inc/Web data/SJ-3515.pdf
The wiring looks like this:
-------- 1 AUD_GND (Sleeve)
| ______ 2 AUD_RET_R (Ring return)
- -| / ^
| | |--- 3 AUD_FPOUT_R (Ring signal)
| |
| | |--- 4 AUD_RET_L (Tip return signak)
| | v
- -| \_____ 5 AUD_FPOUT_L (Tip signal)
When you insert a headset into the above jack, 4 is disconnected from
5, and 3 is disconnected from 2, which mutes the speakers on the back of
the computer.
Here is wiring suitable for an electret microphone, or a passive mono
microphone:
-------- 1 AUD_GND (Sleeve)
| ______ 2 AUD_MIC_BIAS (Ring signal)
- -| /
| |
| |
- -| \_____ 3 AUD_MIC (Tip signal)
|
HTH,
Paul
