Installing and Replacing Desktop Board Components
39
Connecting the Front Panel Header
Before connecting the front panel header, observe the precautions in “Before You Begin” on
page 25. Figure 13-E on page 38 shows the location of the front panel header. Table 5 shows the
pin assignments for the front panel header.
Table 5. Front Panel Header (J9J1)
Pin Signal In/Out Description Pin Signal In/Out Description
Hard Drive Activity LED Power LED
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 On/Off Switch
5 Ground Ground 6 SWITCH_ON# In Power switch
7 FP_RESET# In Reset switch 8 Ground Ground
9 +5 V Out Power 10 N/C Not connected
Connecting USB 2.0 Headers
Before connecting USB 2.0 headers, observe the precautions in “Before You Begin” on page 25.
Figure 13-F and -G on page 38 shows the location of the USB 2.0 headers. Table 6 shows the pin
assignments for the headers.
Table 6. USB 2.0 Headers (J9F1 and J9H1)
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 (no pin) 10 Not connected
Note: USB ports may be assigned as needed.