In article <cpUlc.8300$L8.379@nwrdny02.gnilink.net>, "laura"
<ltaylor2.RemoveThis@verizon.net> wrote:
> Sorry i just reread your post after i posted back i found it and
> i now have sound!
> i know why i took them off in the first place, i have a case that
> has usb and a mic and headset connections.
> In the manuel fp_audio1 says it is for front panel audio cable.
> All the connectors matched so i took off the jumpers.
> Now i am not sure where the front panel connections go.
>
> > > MIC2 X X AGND
> > > MICPWR X X +5VA
> > > Line_out_R X<-->X BLINE_OUT_R
> > > NC X
> > > Line_out_L X<-->X BLINE_OUT_L
> > >
> > > The motherboard should have shipped from the factory with
> > > those two jumpers in place. Note there is one missing pin
> > > on the header (only 9 X's shown above, where X is a pin).
> > > <--> is my symbol for a jumper.
Here is an "ASCII art" picture of the wiring:
-------------
| |
----------| Sound |
| | Chip |
| ------| |
| | | |
| | | |
Case Front Audio | | -------------
("Interrupting" Type Jack) | |
| |
-------- 1 AGND | | Lime Lineout (Back)
| ______ 2 Line_out_R <------ |
- -| / ^ | AGND ----------+ (SLEEVE)
| | |--- 3 BLINE_OUT_R -------- | --------------------+ (RING)
| | |
| | |--- 4 BLINE_OUT_L -------- | ------------------+ (TIP)
| | v |
- -| \_____ 5 Line_out_L <----------
The sound starts with the sound chip, then the stereo signals
go to the Line_out_R and Line_out_L signals. If you have the
two jumpers in place, the signals get bridged to the back of
the computer.
When you remove the jumpers, you need an "Interrupting" type
jack for the headphone jack on the front of the computer. If the
jack has only three wires (Left, Right, GND), then there are
no "return" signals available to drive BLINE_OUT_R and
BLINE_OUT_L.
The way the interrupting type jack works, is when no headset
is plugged in, the two contacts close, and work just like
they were jumpers, to jumper the sound chip signals to
the connector on the back of the computer.
When you plug a headset into the front of the computer, the
plug causes the contacts to open. The headset gets its audio
signal OK, but because the contacts are open, this disconnects
the signals from the back of the computer.
If your case doesn't have the "interrupting" type jack, then
wire "3" and "4" in the diagram above, are missing. Then, the
front headset jack works, but the back doesn't. If you can
find a way of leaving the jumpers in place, while connecting
the headphone jack, then sound will be available front and
back, all the time. There are no retail products available to
do this, and due to the presence of the +5V signal on
the FPAUDIO header, I don't recommend neophyte wiring to
try to solve the problem. (Shorting +5 to something could
cause problems.)
An Asus J-Panel is a drive bay mounted product that gives
you some connectors including a proper headphone jack. If
you have money to burn, try one of these.
<a style='text-decoration: underline;' href="http://ec1.macrotron.de/PDF/B99Z429.pdf" target="_blank">http://ec1.macrotron.de/PDF/B99Z429.pdf</a>
HTH,
Paul<!-- ~MESSAGE_AFTER~ -->
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