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Installing and Replacing Desktop Board Components
41
Connecting Internal Headers
Before connecting cables to the internal headers, observe the precautions in "Before You Begin" on
page
25. Figure 20 shows the location of the internal headers.
OM17641
1
3
USB A
USB B
Power (+5V)
Power (+5V)
D-
D+
Ground
Key (no pin)
N/C
D-
D+
Ground
5
6
7
8
3
4
2
10
1
Ground
Ground
TPA2+
TPA2-
TPA1-
TPA1+
+12 V
+12 V
Ground
Key
(no pin)
1394a
1
5
6
7
3
4
2
8
10
A
C
F
12
B
D
E
On/Off
Power LED
HD LED
Reset
No Connection
1
2
3
4
5
7
6
8
9
Port1L
Port1R
Port2R
Sense_Send
Port2L
GND
Presence#
Sense1_Ret
Key (no pin)
Sense2_Ret
1
5
6
7
3
4
2
10
9
Item Description
A Front panel audio
B Chassis intrusion
C USB 2.0 (two)
D IEEE 1394a (two)
E Alternate power LED
F Front panel
Figure 20. Internal Headers