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Dell™PowerEdge™1850SystemsInstallationandTroubleshootingGuide

Introduction

Indicators, Messages, and Codes

Finding Software Solutions

Running the System Diagnostics

Troubleshooting Your System

Installing System Components

Installing Drives

Getting Help

Jumpers, Switches, and Connectors

I/O Connectors

Notes, Notices, and Cautions

Abbreviations and Acronyms

For a complete list of abbreviations and acronyms, see the Glossary in your User's Guide.

Information in this document is subject to change without notice.

©2004-2009DellInc.Allrightsreserved.

Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.

Trademarks used in this text: Dell, the DELL logo, Inspiron, Dell Precision, Dimension, OptiPlex, PowerApp, PowerEdge, , , , , , PowerConnect PowerVault DellNet Axim Latitude and Dell

OpenManage are trademarks of Dell Inc.; Intel and Pentium are registered trademarks of Intel Corporation; Microsoft and Windows are registered trademarks of Microsoft Corporation.

Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Inc. disclaims any

proprietary interest in trademarks and trade names other than its own.

Initial release: 9 Aug 2004

Laste Updated: 17 Jun 2009

NOTE: A NOTE indicates important information that helps you make better use of your computer.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.

Back to Contents Page

 Jumpers, Switches, and Connectors

Dell™PowerEdge™1850SystemsInstallationandTroubleshootingGuide

Jumpers—A General Explanation

System Board Jumpers

System Board Connectors

Riser Board Connectors

SCSI Backplane Connectors

Disabling a Forgotten Password

This section provides specific information about the system jumpers. It also provides some basic information on jumpers and switches and describes the

connectors 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 reconfiguring the system, you may need to

change jumper settings on circuit boards or drives.



Jumpers

Jumpers 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

the pins 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 a jumper.

Figure A- 1. Example Jumper

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withatrianglesothatyoucanidentifyeachpinnumberbasedonthelocationofpin1.

FigureA-2 shows the location and default settings of the server-module jumper blocks. See TableA-1 for the designations, default settings, and functions of

the jumpers.

System Board Jumpers