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Chapter 3 Motherboard Connections
Chapter 3
Motherboard Connections
This section describes the connections on the X11SBA-LN4F motherboard and provides
pinout definitions. Note that depending on how the system is configured, not all connections
are required. The LEDs on the motherboard are also described here. A motherboard layout
indicating component locations may be found in Chapter 1.
Please review the Safety Precautions in Appendix A before installing or removing components.
3.1 Power Connections
Main ATX Power Supply Connector
The primary power supply connector (JPW1) meets the ATX SSI EPS 24-pin specification.
ATX Power 24-pin Connector
Pin Definitions
Pin#
Definition
Pin#
Definition
13
+3.3V
1
+3.3V
14
NC
2
+3.3V
15
Ground
3
Ground
16
PS_ON
4
+5V
17
Ground
5
Ground
18
Ground
6
+5V
19
Ground
7
Ground
20
Res (NC)
8
PWR_OK
21
+5V
9
5VSB
22
+5V
10
+12V
23
+5V
11
+12V
24
Ground
12
+3.3V