Installing and Replacing Desktop Board Components
Connecting USB 2.0 Headers
Before connecting the USB 2.0 headers, observe the precautions in "Before You Begin" on page 23. See Figure 20, D on page 39 for the location of the black USB 2.0 headers. Table 7 shows the pin assignments for the USB 2.0 headers.
Table 7. USB 2.0 Header Signal Names
| USB Port A |
Pin | Signal Name |
1 | Power |
3 | D- |
5 | D+ |
7Ground
9Key
| USB Port B |
Pin | Signal Name |
2 | Power |
4 | D- |
6 | D+ |
8 | Ground |
10 | No connect |
Note: USB ports may be assigned as needed.
Connecting IEEE 1394a Headers
Before connecting the IEEE 1394a headers, observe the precautions in "Before You Begin" on page 23. See Figure 20, E on page 39 for the location of the blue IEEE 1394a headers.
Table 8 shows the pin assignments for the headers.
Table 8. IEEE 1394a Header Signal Names
Pin | Signal Name |
1 | TPA1+ |
3 | Ground |
5 | TPA2+ |
7 | +12 V |
9 | Key (no pin) |
Pin | Signal Name |
2 | TPA1- |
4 | Ground |
6 | TPA2- |
8+12 V
10Ground
Connecting the Front Panel Header
Before connecting the front panel header, observe the precautions in "Before You Begin" on page 23. See Figure 20, C on page 39 for the location of the
Table 9 shows the pin assignments for the front panel header.
Table 9. Front Panel Header Signal Names
Pin |
| Signal |
| In/Out |
| Description |
|
| Hard Drive Activity LED (Orange) | ||||
1 |
| HD_PWR |
| Out |
| Hard disk LED pull- |
|
|
| ||||
|
|
|
|
|
| up (330 Ω) to +5 V |
3 |
| HDA# |
| Out |
| Hard disk active LED |
|
|
|
|
|
|
|
Reset Switch (Purple)
5 | Ground |
| Ground |
7 | FP_RESET# | In | Reset switch |
|
|
| |
9 | N/C |
| Not connected |
|
|
|
|
Pin | Signal | In/Out | Description |
|
|
|
|
| Power LED (Green) | ||
|
|
|
|
2 | HDR_BLNK_GRN | Out | Front panel green |
|
|
| LED |
|
|
|
|
4 | HDR_BLNK_YEL | Out | Front panel yellow |
|
|
| LED |
|
|
|
|
On/Off Switch (Red)
6 | SWITCH_ON# | In | Power switch |
|
|
|
|
8 | Ground |
| Ground |
|
|
|
|
10 | No pin |
| No pin |
|
|
|
|
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