Chapter 2: Installation

2-13

CMOS Clear

JBT1 is used to clear CMOS and will also clear any passwords. Instead of pins,
this jumper consists of contact pads to prevent accidentally clearing the contents
of CMOS.
To clear CMOS,
1) First power down the system and unplug the power cord(s).
2) With the power disconnected, short the CMOS pads with a metal object such as
a small screwdriver for at least four seconds.
3) Remove the screwdriver (or shorting device).
4) Reconnect the power cord(s) and power on the system.
Notes:
Do not use the PW_ON connector to clear CMOS.
The onboard battery does not need to be removed when clearing CMOS, however
you must short JBT1 for at least four seconds.
JBT1 contact pads
2-7 Jumper Set tings

Explanation of

Jumpers

To modify the operation of the
serverboard, 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 identiļ¬ ed with
a square solder pad on the printe d
circuit board. See the diagram at
right for an example of jumping pins
1 and 2. Refer to the serverbo ard
layout page for jumper locations.
Note: On two-pin jumpers, "Closed"
means the jumper is on and "Op en"
means the jumper is off the pins.
Connector
Pins
Jumper
Setting
321
321