Dell Precision Workstation 340 Manual de usuario

DellPrecision™WorkStation340ServiceManual

Before You Begin

Safety First—For You and Your Computer

Protecting Against Electrostatic Discharge

Removing and Installing Parts

Computer Cover

Front Panel Door and Hinge Arms

Front-Panel Inserts

Inside Your Computer

System Board Components

Battery

Drives

Computer Memory

Expansion Card Cage (Small Desktop Computer Only)

Expansion Cards

I/O Panel

Control Panel

Chassis Intrusion Switch

Microprocessor

Power Supply

System Board

Notes, Notices, and Cautions

Information in this document is subject to change without notice.

©2003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, and Dell Precision are trademarks of Dell Computer 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.

March 2003 Rev. A02

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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Battery

DellPrecision™WorkStation340ServiceManual

The 3.0-V CR2032 coin-cell battery installed on the system board provides power to retain the configuration, date, and time information when the computer is

turned off. The computer battery is designed to provide years of service without being replaced. However, you may need to replace the battery if configuration

or clock-related inconsistencies occur or if one of the following messages is displayed during the boot routine:

Time-of-day not set -please run SETUP program

or

Invalid configuration information -

please run SETUP program



1. If you have not already done so, make a copy of your computer configuration information in system setup.

If the settings are lost while you are replacing the battery, you can refer to your copy of the computer configuration information to restore the correct

settings.

2. Turn off the computer and devices, disconnect them from their electrical outlets, and wait 10 to 20 seconds.

3. Open the computer cover.

4. Remove the battery.

To locate the battery on the system board, see your computer's illustration in "System Board Components."

Removing the Battery



Press in on the tab to release the battery.

5. Install the new battery.

Orient the battery with the side labeled "+" facing up. Then insert the battery into the socket, and snap it into place.

Installing the Battery



CAUTION: There is a danger of the new battery exploding if it is installed incorrectly. Replace the battery only with the same or equivalent type

recommended by the manufacturer. Discard used batteries according to the manufacturer's instructions.

CAUTION: Before you perform this procedure, see "Safety First—For You and Your Computer."

NOTICE: Before disconnecting a device from the computer, wait 10 to 20 seconds after disconnecting the computer from its electrical outlet. Before

removing a component from the system board, verify that the standby power light on the system board has turned off. To locate this light, see your

computer's illustration in "System Board Components."

battery

battery socket

tab



6. Close the computer cover.

7. Reconnect the computer and devices to their electrical outlets, and turn them on.



8. Enter system setup and enter the current time and date. Then exit system setup and save the information.

For more information on entering system setup, see your User's Guide.

9. Turn off your computer and disconnect it from its electrical outlet. Leave the computer off for at least 10 minutes.

10. Reconnect the computer to its electrical outlet and turn it on.

11. Enter system setup, and check the date and time.

12. If the time and date are still incorrect, contact Dell for technical assistance.

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

battery

battery socket

NOTE: If enabled, the Chassis Intrusion option will cause the following message to be displayed at the next computer start-up: ALERT! Cover was

previously removed.

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Chassis Intrusion Switch

DellPrecision™WorkStation340ServiceManual

Removing the Chassis Intrusion Switch



1. Turn off the computer and devices, disconnect them from their electrical outlets, wait at least 10 to 20 seconds, lay the mini-tower computer on its side,

and open the computer cover.

Small Desktop Computer



Small Mini-Tower Computer



2. Disconnect the chassis intrusion switch cable connector from the control panel on the front of the computer.

Note the routing of the chassis intrusion cable as you remove it from the computer. Hooks may hold the cable in place inside the computer.

3. Slide the chassis intrusion switch out of its slot and remove the switch and its attached cable from the computer.

CAUTION: Before you perform this procedure, see "Safety First—For You and Your Computer."

NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power light on the

system board has turned off. To locate this light, see "System Board Components."

Replacing the Chassis Intrusion Switch

To replace the chassis intrusion switch, follow the "Removing the Chassis Intrusion Switch" procedures in reverse order.

Resetting the Chassis Intrusion Detector

1. Enter system setup by pressing <F2> during the computer's POST.

For instructions on using system setup, see the User's Guide.

2. Under the System Security tab, reset the Chassis Intrusion option by pressing the left-or right-arrow key to select Reset. Change the setting to

Enabled, Enabled-Silent, or Disabled.



3. Press <Alt><B> to restart the computer and implement your changes.



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

NOTE: The default is Enabled-Silent.

NOTE: If a setup password has been assigned by someone else, contact the network administrator for information on resetting the chassis intrusion

detector.

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Computer Cover

DellPrecision™WorkStation340ServiceManual

Opening the Computer Cover



1. Turn off the computer and devices, disconnect them from their electrical outlets, and wait 10 to 20 seconds.

2. If you have installed a padlock through the padlock ring on the back panel, remove the padlock.

3. If you have a mini-tower computer, lay the computer on its side.



4. Press the two release buttons until the cover is free to swing up.



5. Raise the back of the cover, and pivot it toward the front of the computer.

Small Desktop Computer



Mini-Tower Computer



CAUTION: Before you perform this procedure, see "Safety First—For You and Your Computer."

NOTICE: Before disconnecting a device from the computer, wait 10 to 20 seconds after disconnecting the computer from its electrical outlet. Before

removing a component from the system board, verify that the standby power light on the system board has turned off. To locate this light, see your

computer's illustration in "System Board Components."

NOTE: On the small desktop computer, remove the stand before you open the computer cover. On the mini-tower computer, place the computer on its

side before you open the cover. See your User's Guide for more information.

NOTICE: Do not open the cover if the computer is on the edge of a desk or table. Doing so may cause the computer to tip over and fall. Make sure that

the computer is situated so that there is at least 12 inches of desk-or tabletop for the cover to rest on.

NOTICE: Open the cover slowly to ensure you do not damage any cables.

Closing the Computer Cover

1. Check all cable connections, especially those that might have come loose during your work. Fold cables out of the way so that they do not obstruct the

computer cover.

2. Ensure that no tools or extra parts (including screws) are left inside the computer.

3. Close the computer cover by pivoting the cover down toward the back of the computer and into position. Make sure that the release buttons click into

place.

Small Desktop Computer



Mini-Tower Computer



4. If you are using a padlock to secure your computer, install the padlock.

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

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Control Panel

DellPrecision™WorkStation340ServiceManual



Removing the Control Panel

Desktop Computer

1. Remove the front I/O panel.



2. Using an 8-inch #2 Phillips screwdriver, remove the screw that secures the control panel to the computer, and lift the panel away from the computer.

Mini-Tower Computer

1. To remove the top and bottom panels of the computer, remove any installed CD drives and release all the tabs on each panel.



CAUTION: Before you perform this procedure, see the safety instructions in your System Information Guide.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such

as the back panel) on the computer.

NOTICE: Before you disconnect a device from the computer or remove a component from the system board, verify that the standby power light on the

system board has turned off. To locate the light, see "System Board Components."

2. To prepare the computer cover for removal, release the three computer cover tabs (one tab is located by the CD drive and two tabs are located by the

I/O panel).



3. If necessary, remove the computer cover screw.

4. Close the computer and remove the computer cover.

5. Remove the screw that secures the control panel to the computer, and pull the control panel away from the computer.



Replacing the Control Panel

Desktop Computer

Follow the steps in the "Removing the Control Panel" procedure in the reverse order, ensuring that all tabs are secure.

Mini-Tower Computer

Follow the steps in the "Removing the Control Panel" procedure in the reverse order, ensuring that all tabs are secure.



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

computer cover tab (remove the CD drive to access this tab)

top-panel tabs

top panel

bottom panel

computer cover screw

computer cover tabs (2)

NOTE: To release the tab located by the CD drive, you can pry the computer cover away from the computer and pull out the tab.

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