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5-10 Jumper Settings
Explanation of
Jumpers
To modify the operation of the mother-
board, 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 identifi ed with a square solder
pad on the printed circuit board. See
the motherboard layout pages for
jumper locations.
Note: On a two-pin jumper, "Closed"
means the jumper is on both pins and
"Open" means the jumper is either on
only one pin or completely removed.
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 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
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.
Onboard Speaker
To use the internal (onboard) speaker,
place a jumper on pins 6-7 of JD1. If
you wish to use an external speaker,
connect the speaker header to pins 4
through 7 of JD1.
Chapter 5: Advanced Serverboard Setup
Connector
Pins
Jumper
Setting
Onboard Speaker
Jumper Settings (JD1)
Setting
Jump pins 6-7
Connect to 4-7
5-19
3
2
1
3
2
1
Defi nition
Internal Speaker
External Speaker
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