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5-9
Jumper Settings
Explanation of
Jumpers
To modify the operation of the
serverboard, jumpers can be
used
to
optional settings.
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 serverboard layout pages
for jumper locations.
Note: On two pin jumpers,
"Closed" means the jumper is
on and "Open" means the
jumper is off the pins.
CMOS Clear
JBT1 is used to clear CMOS (which 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 unplug the power cord(s)
2) With the power disconnected, short the CMOS pads with a metal object such
as a small screwdriver
3) Remove the screwdriver (or shorting device)
4) Reconnect the power cord(s) and power on the system.
Note: Do not use the PW_ON connector to clear CMOS.
choose
between
Jumpers
Chapter 5: Advanced Serverboard Setup
Connector
Pins
Jumper
Cap
Setting
5-17
3
2
1
3
2
1
Pin 1-2 short
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