Dell PowerEdge 1750 Leitfaden

Dell™PowerEdge™1750SystemsInstallationandTroubleshootingGuide

Introduction

Indicators, Messages, and Codes

Finding Software Solutions

Running the System Diagnostics

Troubleshooting Your System

Installing System Options

Installing Drives

Getting Help

Jumpers and Connectors

I/O Connectors

Abbreviations and Acronyms

Information in this document is subject to change without notice.

©2002DellComputerCorporation.Allrightsreserved.

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

Trademarks used in this text: Dell, the DELL logo, PowerEdge, DellNet, Dell OpenManage, Dimension, Inspiron, Dell Precision, OptiPlex, and Latitude are trademarks of Dell Computer

Corporation; Xeon is a trademark and Intel is a registered trademark 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 Computer Corporation

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

Initial release: 17 Dec 2002

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.

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Jumpers and Connectors

Dell™PowerEdge™1750SystemsInstallationandTroubleshootingGuide

Jumpers—AGeneralExplanation

System Board Jumpers

System Board Connectors

SCSI Backplane Board Connectors

Disabling a Forgotten Password

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 reconfiguring the system, you may need to

change jumper settings on the system board. You may also need to change jumper settings on expansion cards 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 so that you can identify each pin number based on the location of pin 1.

System Board Jumpers

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 the system's jumpers.

Figure A-2. System Board Jumpers



CAUTION: Make sure the system is turned off before you change a jumper setting. Otherwise, damage to the system or unpredictable results may

occur.

Table A-1.SystemBoardJumperSettings

System Board Connectors

See FigureA-3 and TableA-2 for the descriptions and locations of the system board connectors.

Figure A-3. System Board Connectors and Sockets



Table A-2.SystemBoardConnectorsandSockets

Jumper

Setting

Description

PASSWD

(default)

The password feature is enabled.

The password feature is disabled.

NVRAM_CLR

(default)

The configuration settings are retained at system boot.

The configuration settings are cleared at next system boot. (If the configuration settings become corrupted to the point

where the system will not boot, install the jumper plug and boot the system. Remove the jumper before restoring the

configuration information.)

RSVD



Reserved (do not change).

jumpered unjumpered

Connector or Socket

Description

BACKPLANE

SCSI backplane board connector

System battery connector

CYCLOPS

Cable-management arm system status connector

DIMM_1x; DIMM_2x

Memory module sockets

EMBEDDED_REMOTE_

ASSISTANT

Connector for optional RAC

EMP_NIC

RAC Ethernet port connector

ETHERNET_n

NIC connectors (2)

FANn

Cooling fan power connectors (six on system board; one on control panel assembly)

FRONT_PANEL

System control panel connector

KYBD

Keyboard connectors

MOUSE

Mouse connector

PCIn

PCI riser board connector

PROCESSOR 1

Microprocessor socket 1

PROCESSOR 2

Microprocessor socket 2

PS_PWR

System board power connector

SCSI Backplane Board Connectors

FigureA-4 shows the location of the connectors on the top of the SCSI backplane board.

Figure A-4. Connectors on the SCSI Backplane Board



Disabling a Forgotten Password

The system's software security features include a system password and a setup password, which are discussed in detail in "Using the System Setup

Program" in the User's Guide. A password jumper on the system board enables these password features or disables them and clears any password(s)

currently in use.

To disable a forgotten system password or setup password, perform the following steps.



1. Open the system covers. See "Opening the System Covers" in "Troubleshooting Your System."

2. See FigureA-2 for the location of the password jumper (labeled "PASSWD") on the system board.

3. Remove the jumper plug from the PASSWD jumper.

4. Close the system covers. See "Closing the System Covers" in "Troubleshooting Your System."

5. Reconnect the system to an electrical outlet and turn it on.

The existing passwords are not disabled (erased) until the system boots with the PASSWD jumper plug removed. However, before you assign a new

system and/or setup password, you must reinstall the jumper plug.



6. Repeat step 1.

7. Install the jumper plug on the PASSWD jumper.

8. Close the system covers, and then reconnect the system and peripherals to their electrical outlets and turn them on.

9. Assign a new system and/or setup password.

To assign a new passwords using the System Setup program, see "Assigning a System Password" in the User's Guide.

PS_SIG

Power supply signal connector

RAID

Socket for optional ROMB card

RAID BAT

Backup battery connector for ROMB card

SCSI_B

External SCSI connector

SERIAL

Serial port connector

USBn

USB connector

VGA

VGA connector

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. See

your System Information Guide for complete information about safety precautions, working inside the computer, and protecting against

electrostatic discharge.

NOTE: If you assign a new system and/or setup password with the jumper plug still removed, the system disables the new password(s) the next

time it boots.

Back to Contents Page



Back to Contents Page 
I/O Connectors 
Dell™PowerEdge™1750SystemsInstallationandTroubleshootingGuide 
I/O Connectors 
Serial Connector 
PS/2-Compatible Keyboard and Mouse Connectors 
Video Connector 
USB Connector 
RAC Ethernet Connector 
Integrated NIC Connector 
Network Cable Requirements 
 
I/O Connectors 
I/O connectors are the gateways that the system uses to communicate with external devices, such as a keyboard, mouse, printer, or monitor. This section 
describes the various connectors on your system. If you reconfigure the hardware connected to the system, you may also need the pin number and signal 
information for these connectors. FigureB-1illustrates the I/O connectors on the system back panel; FigureB-2 identifies the I/O connectors on the front 
panel. 
Figure B-1. I/O Connectors on Back Panel 

 

Figure B-2. I/O Connectors on Front Panel 

 


TableB-1 shows the icons used to label the connectors on the system.



Table B-1.I/OConnectorIcon

Serial Connector

Serial connectors support devices such as external modems, printers, and mice that require serial data transmission. The serial connector uses a 9-pin D-

subminiature connector.

Serial Connector Autoconfiguration

The default designation of the integrated serial connector is COM1. When you add an expansion card containing a serial connector that has the same

designation as the integrated connector, the system's autoconfiguration feature remaps (reassigns) the integrated serial connector to the next available

designation. Both the new and the remapped COM connectors share the same IRQ setting. COM1 and COM3 share IRQ4, while COM2 and COM4 share IRQ3.



Before adding a card that remaps the COM connectors, check the documentation that came with the software to make sure that the software can

accommodate the new COM connector designation.

FigureB-3 illustrates the pin numbers for the serial connector and TableB-2 defines the pin assignments for the connector.

Figure B-3. Serial Connector Pin Numbers



Table B-2.SerialConnectorPinAssignments

PS/2-Compatible Keyboard and Mouse Connectors

Icon

Connector

Serial connector

Mouse connector

Keyboard connector

Video connector

USB connector

NIC connector

RAC Ethernet connector

NOTE: If two COM connectors share an IRQ setting, you may not be able to use them both at the same time. In addition, if you install one or more

expansion cards with serial connectors designated as COM1 and COM3, the integrated serial connector is disabled.

Signal

I/O

Definition

DCD

Data carrier detect

SIN

Serial input

SOUT

Serial output

DTR

Data terminal ready

GND

N/A

Signal ground

DSR

Data set ready

RTS

Request to send

CTS

Clear to send

Ring indicator

Shell

N/A

Chassis ground

The PS/2-compatible keyboard and mouse cables attach to 6-pin, miniature DIN connectors. FigureB-4 illustrates the pin numbers for these connectors and

TableB-3 defines the pin assignments for these connectors.

Figure B-4. PS/2-Compatible Keyboard and Mouse Connector Pin Numbers



Table B-3. Keyboard and Mouse Connector

PinAssignments

Video Connector

You can attach a VGA-compatible monitor to the system's integrated video controller using a 15-pin high-density D-subminiature connector. FigureB-5

illustrates the pin numbers for the video connector and TableB-4 defines the pin assignments for the connector.



Figure B-5. Video Connector Pin Numbers



Table B-4.VideoConnectorPinAssignments

USB Connector

The system's USB connector supports USB-compliant peripherals such as keyboards, mice, and printers and may also support USB-compliant devices such as

diskette drives and CD drives. FigureB-6 illustrates the pin numbers for the USB connector and TableB-5 defines the pin assignments for the connector.

Signal

I/O

Definition

KBDATA or MSDATA

I/O

Keyboard data or mouse data

N/A

No connection

GND

N/A

Signal ground

FVcc

N/A

Fused supply voltage

KBCLK or MSCLK

I/O

Keyboard clock or mouse clock

N/A

No connection

Shell

N/A

Chassis ground

NOTE: Installing a video card automatically disables the system's integrated video controller.

Signal

I/O

Definition

RED

Red video

GREEN

Green video

BLUE

Blue video

N/A

No connection

5–8, 10

GND

N/A

Signal ground

VCC

N/A

Vcc

N/A

No connection

DDC data out

Monitor detect data

HSYNC

Horizontal synchronization

VSYNC

Vertical synchronization

DDC clock out

Monitor detect clock



Figure B-6. USB Connector Pin Numbers



Table B-5.USBConnectorPinAssignments

RAC Ethernet Connector

The system's optional RAC circuitry is designed to provide remote access capabilities for the system. It is designed specifically to work with systems

management software. FigureB-7 illustrates the pin numbers for the RAC Ethernet connector and TableB-6 defines the pin assignments for the connector.

Figure B-7. RAC Ethernet Connector



Table B-6.RACEthernetConnectorPinAssignments

Integrated NIC Connector

The system's integrated NIC functions as a separate network expansion card while providing fast communication between servers and workstations.

FigureB-8 illustrates the pin numbers for the NIC connector and TableB-7 defines the pin assignments for the connector.

Figure B-8. NIC Connector



NOTICE: Do not attach a USB device or a combination of USB devices that draw a maximum current of more than 500 mA per channel or +5 V. Attaching

devices that exceed this threshold may cause the USB connectors to shut down. See the documentation that accompanied the USB devices for their

maximum current ratings.

Signal

I/O

Definition

Vcc

N/A

Supply voltage

DATA–

I/O

Data (–)

DATA+

I/O

Data (+)

GND

N/A

Signal ground

Signal

I/O

Definition

TD+

Data out (+)

TD–

Data out (–)

RD+

Data in (+)

N/A

No connection

N/A

No connection

RD–

Data in (–)

N/A

No connection

N/A

No connection



Table B-7.NICConnectorPinAssignments

Network Cable Requirements

The NIC supports a UTP Ethernet cable equipped with a standard RJ45-compatible plug. Observe the following cabling restrictions.



lUse Category 5 or greater wiring and connectors.

lDo not exceed a cable run length (from a workstation to a hub) of 100 m (328 ft).

For detailed guidelines on operation of a network, see "Systems Considerations of Multi-Segment Networks" in the IEEE 802.3 standard.



Back to Contents Page



Signal

I/O

Definition

TP0+

I/O

Data0 (+)

TP0–

I/O

Data0 (–)

TP1+

I/O

Data1 (+)

TP2+

I/O

Data2 (+)

TP2–

I/O

Data2 (–)

TP1–

I/O

Data1 (–)

TP3+

I/O

Data3 (+)

TP3–

I/O

Data3 (–)

NOTICE: To avoid line interference, voice and data lines must be in separate sheaths.

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