Dell Latitude C540 Series User manual

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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.
© 2002-2003 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 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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