latitude l400.pdf

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67CUJa00.book
Dell© Latitude© L400
SERVICE MANUAL
www.dell.com
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Notes, Notices, and Cautions
Throughout this guide, blocks of text may be accompanied by an icon and printed in bold type or
in italic type. These blocks are notes, notices, and cautions, and they are used as follows:
NOTE: A NOTE indicates important information that helps you make better use of your computer
system.
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 potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
____________________
Information in this document is subject to change without notice.
© 2001 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.
February 2001 P/N 67CUJ Rev. A00
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Contents
Recommended Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Preparing to Work Inside Your Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Screw Identification and Tightening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ZIF Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Removing Field-Replaceable Parts and Assemblies . . . . . . . . . . . . . . . . . . . . 6
Hard-Disk Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Keyboard Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Display Assembly Bezel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Display Assembly Latch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
LCD Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Display Assembly Hinges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Keyboard Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Memory Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Palmrest Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Touch Pad Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Bottom Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Reserve Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Main Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
System Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Main Battery Release Latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
APR Docking Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Index
Figures
Figure 1. Computer Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Main Battery Assembly Removal. . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 3. Screw Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 4. Disconnecting an Interface Cable . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 5. Exploded View—Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
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Figure 6. Hard-Disk Drive Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 7. Keyboard Bezel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 8. Display Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 9. Display Assembly Bezel Removal . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 10. Display Assembly Latch Removal . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 11. LCD Panel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 12. Keyboard Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 13. Memory Module Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 14. Removing the Palmrest Assembly Bottom Screws. . . . . . . . . . . 19
Figure 15. Removing the Palmrest Assembly Top Screws. . . . . . . . . . . . . . 20
Figure 16. Touch Pad Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 17. Bottom Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 18. Reserve Battery Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 19. Modem Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 20. Fan Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 21. Speaker Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 22. System Board Assembly Removal. . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 23. Hard-Disk Drive EMI Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 24. Main Battery Release Latch Removal . . . . . . . . . . . . . . . . . . . . . 32
Tables
Table 1. Screw Placement Mat With Component Screw Counts
and Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
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Dell© Latitude© L400 Service
Manual
This manual provides instructions for removing and replacing field-replaceable
components, assemblies, and subassemblies in your Dell Latitude computer.
Unless otherwise noted, each procedure in this manual assumes the following
conditions:
¤ The computer and any attached peripherals are turned off, and the
peripherals are disconnected from the I/O panel on the back and right side
of the computer.
¤ A part can be replaced by performing the removal procedure in reverse
order unless otherwise noted.
When the display assembly is open nearly 180 degrees, use a book or
something similar to support it. The angle of the display assembly with
respect to the bottom case should never exceed 180 degrees. Also, when
performing the procedures in this manual, the locations or directions relative
to the computer are as shown in Figure 1 unless otherwise specified.
back of computer
left side
right side
front of computer
Figure 1. Computer Orientation
support.dell.com
Dell Latitude L400 Service Manual
1
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