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Installing and Replacing Desktop Board Components

USB 2.0 Headers

See Figure 22, A for the location of the black USB 2.0 headers. Table 8 shows the pin assignments

for the headers.

Table 8. 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.

Front Panel Header

Figure 22, C on page 41 shows the location of the multi-colored front panel header. Table 9 shows

the pin assignments for the front panel header.

Table 9. Front Panel Header Signal Names

Pin Signal In/Out Description Pin Signal In/Out Description

Hard Drive Activity LED (Yellow) 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

Alternate Power LED Header

Figure 22, B on page 41 shows the location of the alternate power LED header. If you have a three-

pin power LED cable, connect it to this header.

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