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