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Jumpers: Dell™ PowerEdge™ 350 Systems Service Manual
Overview
Jumpers—A General Explanation
System Board Jumpers
Overview
This section provides specific information about the jumpers on the system board. It also provides some
basic information on jumpers and switches and describes the connectors and sockets on the various boards
in the system.
Jumpers—A General Explanation
Jumpers provide a convenient and reversible way of reconfiguring the circuitry on a printed circuit board.
When installing replacement parts or reconfiguring the system, you may need to change jumper settings on
the system board. You may also need to change jumper and/or switch settings on expansion cards or drives.
To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated.
NOTICE: Make sure the system is turned off before you change a jumper setting. Otherwise, damage
to the system or unpredictable results may occur.
A jumper is referred to as open or unjumpered when the plug is pushed down over only one pin or if there is
no plug at all. When the plug is pushed down over two pins, the jumper is referred to as jumpered. The
jumper setting is often shown in text as two numbers, such as 1-2. The number 1 is printed on the circuit
board so that you can identify each pin number based on the location of pin 1.
System Board Jumpers
Figure 1 shows the location of the configuration jumpers on the system board. Table 1 lists the function of
these jumpers.
Figure 1. System Board Jumpers
1
BIOS CONFIG jumper