Installing and Replacing Desktop Board Components
39
Connecting the USB 2.0 Headers
Before connecting the USB 2.0 headers, observe the precautions in "Before You Begin" on
page 23. See Figure 18, D on page 38 for the location of the black USB 2.0 headers.
Table 5 shows the pin assignments for the USB 2.0 headers.
Table 5. USB 2.0 Header Signal Names
USB Port A USB Port B
Pin Signal name Pin Signal name
1 Power 2 Power
3 D- 4 D-
5 D+ 6 D+
7 Ground 8 Ground
9 Key 10 No connect
Note: USB ports may be assigned as needed.
Connecting the Front Panel Header
Before connecting the front panel header, observe the precautions in "Before You Begin" on
page 23. See Figure 18, C on page 38 for the location of the multi-colored front panel header.
Table 6 shows the pin assignments for the front panel header.
Table 6. Front Panel Header Signal Names
Pin Signal In/Out Description Pin Signal In/Out Description
Hard Drive Activity LED (Orange) Power LED (Green)
1 HD_PWR Out Hard disk LED pull-up
(330 Ω) to +5 V
2 HDR_BLNK_GRN Out Front panel green LED
3 HDA# Out Hard disk active LED 4 HDR_BLNK_YEL Out Front panel yellow LED
Reset Switch (Purple) On/Off Switch (Red)
5 Ground Ground 6 SWITCH_ON# In Power switch
7 FP_RESET# In Reset switch 8 Ground Ground
9 N/C Not connected 10 No pin No pin
Connecting the Front Panel Audio Header
Figure 18, E on page 38 shows the location of the yellow front panel audio header. Table 7 shows
the pin assignments for the front panel audio header.
Table 7. Front Panel Audio Header Signal Names
Pin Signal Name Pin Signal Name
1 Port1L 2 GND
3 Port1R 4 Presence#
5 Port2R 6 Sense1 Ret
7 Sense Send 8 Key (no pin)
9 Port2L 10 Sense2 Ret
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