User's Manual

5-20

A+ SERVER 2042G-TRF/6RF User's Manual

5-10 Jumper Settings

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 identiﬁ ed with

a square solder pad on the printed circuit

board. See the diagram at right 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.

Connector

Pins

Jumper

Setting

3 2 1

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

First power down the system and unplug the power cord(s).1.

With the power disconnected, short the CMOS pads with a metal object such 2.

as a small screwdriver.

Remove the screwdriver (or shorting device).3.

Reconnect the power cord(s) and power on the system.4.

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

JBT1 contact pads