44
SuperServer 5019A-FTN10P User's Manual
4.4 Jumpers
Explanation of Jumpers
To modify the operation of the motherboard, jumpers can be used to choose between optional
settings. Jumpers create shorts between two pins to change the function of the connector.
Pin 1 is identified with a square solder pad on the printed circuit board. See the diagram
below for an example of jumping pins 1 and 2. Refer to the motherboard layout page for
jumper locations.
Note:
On two-pin jumpers, Closed means the jumper is on and Open means the jumper is
off the pins.
JBT1 contact pads
Connector
Pins
Jumper
Setting
3 2 1
3 2 1
CMOS Clear
JBT1 is used to clear the CMOS. Instead of pins, this jumper consists of contact pads to
prevent accidental clearing of the CMOS. To clear the CMOS, use a metal object such as a
small screwdriver to touch both pads at the same time to short the connection.
Note:
Shut down the system and then short JBT1 to clear the CMOS.
