Installing and Replacing Desktop Board Components
45
Front Panel Audio Header
The front panel audio header shown in Figure 20, A supports both Intel High Definition
(HD) Audio and AC ’97 Audio.
Table 7 shows the pin assignments and signal names for HD Audio and Table 8 shows
the pin assignments and signal names for AC ’97 Audio.
Table 7. Front Panel Audio Signal Names for Intel HD Audio
Pin Signal
Name
Pin Signal
Name
1
PORT 1L (Microphone)
2
GND
3
PORT 1R (Microphone)
4
PRESENCE#
5
PORT 2R (Headphone)
6
SENSE1_RETURN
7 SENSE_SEND
8 KEY
(no
pin)
9
PORT 2L (Headphone)
10
SENSE2_RETURN
Table 8. Front Panel Audio Header Signal Names for AC ’97 Audio
Pin Signal
Name
Pin Signal
Name
1
MIC
2
AUD_GND
3 MIC_BIAS
4 PRESENCE#
5 FP_OUT_R
6 AUD_GND
7
No connect
8
KEY (no pin)
9 FP_OUT_L
10
AUD_GND
Alternate Front Panel Power LED Header
Figure 20, B shows the location of the alternate front panel power LED header. Pins 1
and 3 of this header duplicate the signals on pins 2 and 4 of the front panel header. If
your chassis has a three-pin power LED cable, connect it to this header. Table 9
shows the pin assignments for the alternate front panel header.
Table 9. Alternate Front Panel Power LED Header Signal Names
Pin Signal
Name
In/Out
1
Front panel LED+
Out
2 No
pin
3
Front panel LED-
Out
