Front Panel Audio Control - Supermicro X7DAL-E User Manual

Front Panel Audio Control

When front panel headphones are plugged in, the back panel audio output is disabled.
This is done through the FP Audio header (J8). If the front panel interface card is
not connected to the front panel audio header, jumpers should be installed on pin
pairs: 1-2, 5-6, and 9-10 of the header (J8). If these jumpers are not installed, the
back panel line out connector will be disabled and microphone input Pin 1 will be
left fl oating, which can lead to excessive backpanel microphone noise and cross
talk. See the table below for pin defi nitions.
AC'97 FP Audio Header Signal Names
Pin# Signal
1 MIC
2 AUD_GND
3 MIC_BIAS
4 AUD_VCC
5 FP_OUT_R
6 FP_RETURN_R Right channel audio signal return from front
7 NC
8 Key
9 FP_OUT_L
10 FP_RETURN_L
PWR
JPWF
Force-On
Alarm
Reset
LAN1/LAN2
Line-in/
Line-out
Fan5
Fan6
A
Description
FP microphone input signal
Ground used by analog audio circuits
Microphone power
Analog audio VCC+5V
Right channel audio signal to front panel
(headphone drive capable)
panel (when headphones unplugged)
NC (*NC=no connection)
No pin
Left channel audio signal to front panel
(headphone drive capable)
Left channel audio signal return from front panel
(when headphones unplugged)
2nd
Branch
1st
Branch
Fan2
Fan3
2-23
Chapter 2: Installation
A. FP Audio Control