Intel DX79TO Product Guide - Page 51

Alternate Front Panel Power LED Header, Connecting to the Audio System - driver

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Installing and Replacing Desktop Board Components Alternate Front Panel Power LED Header Figure 20, H 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 13 shows the pin assignments and signal names for the alternate front panel power LED header. Table 13. Alternate Front Panel Power LED Header Signal Names Pin Description 1 Front panel green LED 2 No pin 3 Front panel yellow LED In/Out Out Out Connecting to the Audio System After installing the RealTek audio driver from the Intel® Express Installer DVD, the multi-channel audio feature can be enabled. Figure 21 shows the back panel audio connectors. The default connector assignments are shown in the table. Item Description A Line In B Line Out C Mic In Figure 21. 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. 51

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Installing and Replacing Desktop Board Components
51
Alternate Front Panel Power LED Header
Figure 20, H 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 13 shows the pin assignments and signal names for the alternate front panel
power LED header.
Table 13. Alternate Front Panel Power LED Header Signal Names
Pin
Description
In/Out
1
Front panel green LED
Out
2
No pin
3
Front panel yellow LED
Out
Connecting to the Audio System
After installing the RealTek audio driver from the Intel
®
Express Installer DVD, the
multi-channel audio feature can be enabled.
Figure 21 shows the back panel audio
connectors.
The default connector assignments are shown in the table.
Item
Description
A
Line In
B
Line Out
C
Mic In
Figure 21.
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.