Installing and Replacing Desktop Board Components
47
IEEE 1394a Header
Figure 22, G shows the location of the IEEE 1394a header. Table 12 shows the pin
assignments and signal names for the IEEE 1394a header.
Table 12. IEEE 1394a Header Signal Names
Pin Signal Name Pin Signal Name
1 TPA1+ 2 TPA1-
3 Ground 4 Ground
5 TPA2+ 6 TPA2-
7 +12 V 8 +12 V
9 Key (no pin) 10 Ground
Connecting to the Audio System
After installing the Realtek audio driver from the Intel
®
Express Installer DVD-ROM,
the multi-channel audio feature can be enabled. Figure 23 shows the back panel audio
connectors.
The default connector assignments are shown in the table.
Item Description
A Line in
B Front speaker/headphones
C Mic in
Figure 23. Back Panel Audio Connectors
NOTE
The back panel line out connector is designed to power either headphones or amplified
speakers only. Poor audio quality may occur if passive (non-amplified) speakers are
connected to this output.
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