Installing and Replacing Desktop Board Components
Connecting Internal Headers
Before connecting cables to the internal headers, observe the precautions in "Before You Begin" on page 27. Figure 21 shows the location of the internal headers.
F
Port1L | 1 | 2 | GND |
Port1R | 3 | 4 | Presence# |
Port2R | 5 | 6 | Sense1_Ret |
| |||
Sense_Send | 7 |
| Key (no pin) |
Port2L | 9 | 10 | Sense2_Ret |
E
| 1394a |
| |
TPA1+ | 1 | 2 | TPA1- |
Ground | 3 | 4 | Ground |
TPA2+ | 5 | 6 | TPA2- |
+12 V | 7 | 8 | +12 V |
Key |
| 10 | Ground |
(no pin) |
|
|
|
| USB A |
|
| USB B |
| Power (+5V) | 1 | 2 | Power (+5V) |
D | D- | 3 | 4 | D- |
D+ | 5 | 6 | D+ | |
| Ground | 7 | 8 | Ground |
| Key (no pin) |
| 10 | N/C |
|
| 9 |
| No Connection |
| 8 | 7 |
| Reset |
| On/Off | 5 |
| |
C | 6 |
|
| |
4 | 3 |
| HD LED | |
Power LED | 1 |
| ||
| 2 |
|
| |
A
1 2
B
3 |
1 |
OM17620
Item Description
AChassis intrusion
BAlternate power LED
CFront panel
D
EIEEE 1394a (two, optional)
FFront panel audio
Figure 21. Internal Headers
43
