Dell PowerEdge 2500 Installation And Troubleshooting Manual

Also see for PowerEdge 2500: Activation guide Manual Configuration guide Installation guide Attachment guide

Contents

Dell PowerEdge 2500 Installation And Troubleshooting Manual Manual pdf 2 page image

Back to Contents PageJumpers and ConnectorsDell™ PowerEdge™ 2500 Systems Installation and Troubleshooting GuideJumpers—A General ExplanationSystem Board JumpersSystem Board ConnectorsSCSI Backplane Board ConnectorsInterposer Board ConnectorsDisabling a Forgotten PasswordThis section provides specific information about the jumpers on the system board. It also provides some basic information on jumpers and switches and describes theconnectors and sockets on the various boards in the computer.Jumpers—A General ExplanationJumpers provide a convenient and reversible way of reconfiguring the circuitry on a printed circuit board. When reconfiguring the system, you may need to changejumper settings on the system board. You may also need to change jumper settings on expansion cards or drives.JumpersJumpers are small blocks on a circuit board with two or more pins emerging from them. Plastic plugs containing a wire fit down over the pins. The wire connects thepins and creates a circuit. To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated. Figure A-1 shows an example of ajumper.Figure A-1. Example JumpersA 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 twopins, 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 thatyou can identify each pin number based on the location of pin 1.Figure A-2 shows the location and default settings of the jumper blocks on the system board. See Table A-1 for the designations, default settings, and functions of thesystem's jumpers.System Board JumpersFigure A-2 shows the location of the configuration jumpers on the system board. Table A-1 lists the function of these jumpers.Figure A-2. System Board JumpersWARNING: Make sure the system is turned off before you change a jumper setting. Otherwise, damage to the system or unpredictable resultsmay occur.