Lenovo RD540 manual System board jumpers and switches, Default jumper setting

System board jumpers and switches

This topic provides information about the jumpers and switches on the system board.

A jumper is a short length of conductor used to set up or adjust printed circuit boards, such as the system board of a computer. A jumper usually is encased in a non-conductive block of plastic for convenient use and to avoid any possible damage to a live circuit. Jumper pins arranged in groups on the system board are called jumper blocks. When two or more jumper pins are capped with a jumper, an electrical connection is made between them and the equipment is thus instructed to activate certain settings accordingly.

The following illustration shows a jumper in the default setting position (pin 1 and pin 2). This is the correct position for normal operation.

Figure 30. Default jumper setting

42ThinkServer RD540 User Guide and Hardware Maintenance Manual