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 23. Figure 20 shows the location of the internal headers.
A
Port1L | 1 | 2 | GND |
Port1R | 3 | 4 | Presence# |
Port2R | 5 | 6 | Sense1_Ret |
| |||
Sense_Send | 7 |
| Key (no pin) |
Port2L | 9 | 10 | Sense2_Ret |
1394a
TPA1+ 1 2 TPA1-
Ground 3 4 Ground
TPA2+ 5 6 TPA2-
+12 V 7 8 +12 V
Key 10 Ground (no pin)
B
|
| F |
|
|
|
|
USB A |
|
| USB B |
|
|
|
Power (+5V) | 1 | 2 | Power (+5V) |
|
|
|
D- | 3 | 4 | D- |
|
| C |
D+ | 5 | 6 | D+ |
|
| |
Ground | 7 | 8 | Ground | 1 | 2 |
|
Key (no pin) |
| 10 | N/C |
| ||
|
|
|
| |||
|
|
|
|
| 3 | D |
|
|
|
|
| 1 |
| 9 | No Connection |
8 | 7 | Reset |
On/Off | 5 | |
6 |
| |
4 | 3 | HD LED |
Power LED | 1 | |
2 |
|
E
OM18108
Item Description
AFront panel audio
BIEEE 1394a (two)
CChassis intrusion
DAlternate power LED
EFront panel
F
Figure 20. Internal Headers
39
