connectins of front panel audio

Mercury / Km84
April 20, 2009 at 06:03:26
Specs: Windows XP
Im using Intel DG31PR desktop board in Mercury KM84 Cabinet.I don't know how to connect to front panel audio

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#1
April 20, 2009 at 09:02:41
Apparently, "The MERCURY Brand is owned by Kobian Headquartered in Singapore...."
but I haven't found any info anywhere about Mercury or Kobian case wiring.

Generally, there is no info to be found on the web regarding the wiring of front ports on a computer case.
Sometimes the case comes with a printed slip of paper, or there is a label stuck to the inside of the case, describing which wire is for what.
There is often lettering printed on the female connectors coming from the case. If your wiring has such labellling describe what you're seeing.
e.g.
MIC R, MIC L, MIC GND
A OUT R, A OUT L, A OUT GND

Are there USB ports on the front of the case as well?

DG31PR manuals
http://support.intel.com/support/mo...
Both the Product Guide and the Technical Product Specifications show you which pin is for what on the audio header.
If there are no extra wires from the front of the case for an amplified microphone (there usually are none) , you just need to connect to the pins for Port 1 R and L and Port 2 R and L and Ground.
The manuals don't say which port is for headphones or mic, so you have a 50% chance of getting it right the first time. Try headphones or a mic in a port once you have connected the wires - you may need to swap the wires for Port 1 R and L and Port 2 R and L.


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#2
April 22, 2009 at 08:00:46
sir my mother board has following pins for front panel audio header:
Pin Signal Name Pin Signal Name
1. PORT 1L 2. GND
3. PORT 1R 4. PRESENCE#
5. PORT 2R 6. SENSE1_RETURN
7. SENSE_SEND 8. KEY (no pin)
9. PORT 2L 10. SENSE2_RETURN
and my computer casing has following connections:
ORANGE WIRE------------MIC POWER(L)
RED WIRE-------------------LINE OUT FR
BLUE WIRE-----------------LINE OUTRR
WHITE WIRE---------------LINE OUT FL
YELLOW WIRE-----------LINE OUT RL
GREEN WIRE-------------MIC IN(R)
BLACK WIRE-------------GND.
I unable to match this connections.How to match these connections

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#3
April 23, 2009 at 15:40:39
Desktop Boards
Front panel audio header pinouts
http://www.intel.com/support/mother...

The mboard header is for HD audio.
It appears your case wiring is for AC97 audio.

Desktop Boards
Troubleshooting audio issues
http://www.intel.com/support/mother...

AC'97 Front Panel Audio Does Not Work with Onboard HD Audio
http://www.intel.com/support/mother...

Cobbling that info together, I think this should work:

1. PORT 1L left channel (Microphone) ORANGE WIRE----MIC POWER? (L)
(if that doesn't work don't connect it - mic is then mono)
2. GND .................BLACK WIRE--------GND.
3. PORT 1R right channel (Microphone) GREEN WIRE--------MIC IN (R)
4. PRESENCE# .....................No connection
5. PORT 2R right channel (Headphone) RED WIRE---------LINE OUT FR
6. SENSE1_RETURN.............No connection
7. SENSE_SEND...................No connection
8. KEY (no pin)....... No connection, of course
9. PORT 2L left channel (Headphone) WHITE WIRE--------LINE OUT FL
10. SENSE2_RETURN..........No connection

not used
BLUE WIRE-----------------LINE OUT RR
YELLOW WIRE-----------LINE OUT RL
..............................................................

RED WIRE-------------------LINE OUT FR
BLUE WIRE-----------------LINE OUT RR
WHITE WIRE---------------LINE OUT FL
YELLOW WIRE-----------LINE OUT RL
GREEN WIRE-------------MIC IN (R)
ORANGE WIRE------------MIC POWER (L)
BLACK WIRE-------------GND.

All LINE OUT are for the headphones.

2nd letter of pair
R - Right
L - Left

1st letter of pair
F - from mboard header to front panel
R - return - from front panel to mboard header

On some mboards you must remove a jumper on the mboard audio header for Right and Left when you want to use the case jack for stereo heaphones (Line Out) , and run Return wires for Right and Left back to the header to one of the two pins the jumpers were on, but that doesn't apply to this mboard.
.......

As a side note, I'm installing an Asus M3A78 Pro mboard at the moment. The use of the audio header is HD audio by default, but it can be set to either HD or AC97 in the bios Setup, and the manual describes how to connect the case wiring depending on which type it is.


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