Dell Latitude C540 Series Bedienungsanleitung

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Dell Latitude C540/C640 Service Manual

Dell™ Latitude™ C540/C640 Service Manual

Before You Begin

System Components

Hard Drive

Memory Modules, Mini PCI Card, and Modem

Keyboard

Display Assembly, Display Latch, and Hinge Covers

Palm Rest

Microprocessor Thermal Cooling Assembly

Microprocessor Module

Hybrid Cooling Fan

Reserve Battery

Flashing the BIOS

Speaker Assemblies

System Board

Battery and Module Bay Latches

Pin Assignments for I/O Connectors

Notes, Notices, and Cautions

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.

Information in this document is subject to change without notice.

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 Latitude 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.

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Dell Latitude C540/C640 Service Manual

April 2003 Rev. A01

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Before You Begin: Dell Latitude C540/C640 Service Manual

Back to Contents Page

Before You Begin

Dell™ Latitude™ C540/C640 Service Manual

Preparing to Work Inside the Computer

Recommended Tools

Screw Identification

Preparing to Work Inside the Computer

CAUTION: Before working inside your computer, read the safety instructions in your

System Information Guide.

CAUTION: Only a certified service technician should perform repairs on your

computer. Damage due to servicing that is not authorized by Dell is not covered by

your warranty.

NOTICE: To avoid damaging the computer, perform the following steps before you begin

working inside the computer.

1. Ensure that the work surface is clean to prevent scratching the computer cover.

2. Save any work in progress and exit all open programs.

3. Turn off the computer and all attached devices.

NOTE: Before turning off the computer, ensure that the computer is not in a power

management mode. If you cannot shut down the computer using the computer operating

system, press and hold the power button for 4 seconds.

4. If the computer is connected (docked) to a docking device, undock it. See the documentation

that came with the docking device for instructions.

5. Disconnect the computer and any attached devices from electrical outlets.

6. To avoid possible damage to the system board, wait 10 to 20 seconds and then disconnect any

attached devices.

7. Disconnect all other external cables from the computer.

8. Remove any installed PC Cards or plastic blanks from the PC Card slot.

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Before You Begin: Dell Latitude C540/C640 Service Manual

9. Close the display and turn the computer upside down on a flat work surface.

NOTICE: To avoid damaging the system board, you must remove the main battery and

secondary battery (if present) before you service the computer.

10. Remove the primary battery from the battery bay and the secondary battery from the module

bay, if a secondary battery is in use.

11. Remove any installed device in the module bay.

12. To dissipate any static electricity while you work, use a wrist grounding strap or periodically

touch an unpainted metal surface.

13. Handle components and cards with care. Do not touch the components or contacts on a card.

Hold a card by it edges or by its metal mounting bracket. Hold a component such as a

microprocessor by its edges, not by its pins.

Recommended Tools

The procedures in this manual require the following tools:

●#1 magnetized Phillips screwdriver

●¼-inch flat-blade screwdriver

●Small plastic scribe

●Microprocessor extractor

●Flash BIOS update program floppy disk or CD.

Computer Orientation

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Before You Begin: Dell Latitude C540/C640 Service Manual

1 back

2 right

3 front

4 left

Screw Identification

When you are removing and replacing components, photocopy the placemat as a tool to lay out and

keep track of the screws. The placemat provides the number of screws and their sizes.

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Before You Begin: Dell Latitude C540/C640 Service Manual

NOTICE: When reinstalling a screw, you must use a screw of the correct diameter and length.

Ensure that the screw is properly aligned with its corresponding hole, and avoid overtightening.

Hard Drive Door:

(1 each)

Memory Module Cover:

(2 captive screws)

(1 each)

NOTE: The single screw is one

of the five keyboard screws.

Modem to

System Board:

(2 each)

Keyboard to

Bottom Case:

(5 each)

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Before You Begin: Dell Latitude C540/C640 Service Manual

Hinges to Bottom Case:

(5 each)

Display-Feed Flex Cable:

(4 each)

Display Bezel:

(6 each)

Rubber Screw Covers (6 each)

Display Panel to Top Cover:

(5 each)

Display Latch:

(2 each) (2 each)

Palm Rest to

Bottom Case:

(3 each) (5 each)

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Before You Begin: Dell Latitude C540/C640 Service Manual

Hybrid Cooling Fan:

(2 each) (1 each)

System Board to Bottom Case:

(10 each)

Back to Contents Page

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System Components: Dell Latitude C540/C640 Service Manual

Back to Contents Page

System Components

Dell™ Latitude™ C540/C640 Service Manual

NOTICE: Only a certified service technician should perform repairs on your computer. Damage

due to servicing that is not authorized by Dell is not covered by your warranty.

NOTICE: Unless otherwise noted, each procedure in this document assumes that a part can be

replaced by performing the removal procedure in reverse order.

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