User's Manual

5-16

SUPERSERVER 5015A-EHF-D525 User's Manual

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.

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.

LAN1/2 Enable/Disable

Change the setting of jumper JPL1

and JPL2 to enable or disable the

LAN1 and LAN2 Ethernets ports, re-

spectively. See the table on the right

for jumper settings. The default setting

is enabled.

LAN1/2

Jumper Settings

Jumper Setting Deﬁ nition

Pins 1-2 Enabled

Pins 2-3 Disabled