User`s manual

Chapter 5: Advanced Serverboard Setup

5-21

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). It is also

recommended that you remove the onboard battery from the serverboard.

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 1. For an ATX power supply, you must completely shut down the system,

remove the AC power cord, and then short JBT1 to clear CMOS.

Note 2. Be sure to remove the onboard CMOS Battery before you short JBT1 to

clear CMOS.

Note 3. Clearing CMOS will also clear all passwords.

Note 4: Do not use the PW_ON connector to clear CMOS.

5-10 Jumper Settings

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 identiﬁ ed with

a square solder pad on the printed circuit

board. See the serverboard 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.

Connector

Pins

Jumper

Setting

3 2 1