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Chapter 3: Motherboard Connections
Chapter 3
Motherboard Connections
This section describes the connections on the 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. More detail can be found in the Motherboard Manual.
Please review the Safety Precautions in Appendix A before installing or removing components.
3.1 Power Connections
JPW1 is the 12-24V DC power connector that provides power to the motherboard. JPH1 is
a 4-pin HDD power connector that provides power to the hard disk drives.
8-pin 12-24V Power
Pin Definitions
Pins
Definition
1 - 4
+12-24V
5 - 8
Ground
4-pin HDD Power
Pin Definitions
Pins
Definition
1
12V
2-3
Ground
4
5V
3.2 Headers and Connectors
Battery Connector
BT1 is a two-pin connector for an external CMOS battery. Refer to section 2.4 for battery
installation instructions. This connector is also used to clear the CMOS. To clear the CMOS,
remove the battery, short pins 1-2 for more than 10 seconds and then install the battery.
Battery Connector
Pin Definitions
Pin#
Definition
Pin#
Definition
1
P3V_BATTERY
2
GND
