Dell LATITUDE cpia User manual

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Information in this document is subject to change without notice.
© 1999 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; IBM is a registered trademark of
International Business Machines 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 1999 P/N 0813P

v
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Recommended Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Preparing to Work Inside Your Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Screw Identification and Tightening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ZIF Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Field-Replaceable Parts and Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Removing Field-Replaceable Parts and Assemblies . . . . . . . . . . . . . . . . . . . 12
Hard-Disk Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Memory Module Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Memory Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Keyboard Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Back Cover Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Palmrest Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Touch-Pad Interface Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Power Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Display Assembly Bezel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Display Assembly Latch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
LCD Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
12.1-Inch LCD Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
13.3-Inch LCD Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
LCD Display Hinge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Display-Assembly Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Bottom Case Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Modular Bay Devices (Diskette Drive, CD-ROM Drive, Battery,
or Travel Module). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Audio Shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Audio Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

vi
Bottom Case Bracket. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Module Latch Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
System Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Exhaust Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
I/R Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Reserve Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
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)LJXUHV Figure 1. Computer Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Main Battery Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 3. Screw Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 4. Disconnecting an Interface Cable . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 5. Exploded View—Computer. . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 6. Hard-Disk Drive Assembly Removal . . . . . . . . . . . . . . . . . . . . 13
Figure 7. Memory Module Cover Removal . . . . . . . . . . . . . . . . . . . . . . 14
Figure 8. Memory Module Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 9. Removing the Keyboard Assembly Screws . . . . . . . . . . . . . . 16
Figure 10. Keyboard Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 11. Back Cover Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 12. Palmrest Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 13. Touch-Pad Interface Module Removal . . . . . . . . . . . . . . . . . . 21
Figure 14. Display Assembly Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 15. Display Assembly Bezel Removal (12.1-Inch Display Shown) 25
Figure 16. LCD Panel Removal (12.1-Inch Display) . . . . . . . . . . . . . . . . . 27
Figure 17. Cable Layout for the 12.1-Inch LCD Panel . . . . . . . . . . . . . . . 28
Figure 18. LCD Panel Removal (13.3-Inch Display) . . . . . . . . . . . . . . . . . 29
Figure 19. Two-Piece Cable Layout for the 13.3-Inch LCD Panel . . . . . . 30
Figure 20. Bottom Case Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 21. Modular Bay Device Removal . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 22. Audio Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 23. Bottom Case Bracket Removal . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 24. Module Latch Assemblies Removal . . . . . . . . . . . . . . . . . . . . 40
Figure 25. Left Slider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 26. System Board Assembly Removal . . . . . . . . . . . . . . . . . . . . . 42

vii
Figure 27. Processor Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 28. Exhaust Fan Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 29. I/R Board Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 30. Reserve Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7DEOHV Table 1. Parts and Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

viii
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A prerequisite for using this manual to service Dell computer systems is a basic
knowledge of IBM-compatible PCs and prior training in IBM-compatible PC trou-
bleshooting techniques. In addition to information provided in this manual, Dell
provides the
System Users Guide
for troubleshooting procedures and instruc-
tions on using the Dell Diagnostics to test the computer system.
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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, cautions, and warnings, and
they are used as follows:
NOTE: A NOTE indicates important information that helps you make better use
of your computer system.
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Dell Latitude CPiA Service Manual 1
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This manual provides instructions for removing and replacing
field-replaceable components, assemblies, and subassemblies in
your Dell Latitude portable computer. Unless otherwise noted,
each procedure in this chapter assumes the following:
The computer and any attached peripherals are turned off, and the
peripherals are disconnected from the input/output (I/O) panel on
the back of the computer.
A part can be replaced by performing the removal procedure in reverse
order.
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 be allowed to 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.
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right side
left side
back of computer
front of computer

2 Dell Latitude CPiA Service Manual
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Most of the procedures in this manual require the use of one or more of the
following tools:
Number 0 and number 1 magnetized Phillips-head screwdrivers
Small flat-blade screwdriver
Small plastic scribe
Processor extractor
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Before you start to work on the computer, perform the following steps:
1. Save any work in progress and close all open applications.
2. Turn off the computer and any attached peripherals.
NOTE: Make sure the computer is turned off and not in suspend-to-
disk mode. If you cannot shut down the computer using the computer’s
operating system, press the power button for 4 seconds.
3. If the computer is docked in a C/Dock Expansion Station or C/Port
Advanced Port Replicator (APR), undock the computer.
4. Disconnect the computer and any attached peripherals from AC power
sources to reduce the potential for personal injury or shock. Also
disconnect any telephone or telecommunications lines from the computer.
5. Remove the power cord.
6. Disconnect all other external cables from the computer.
7. Remove any installed PC Cards.
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8. Remove the main battery assembly from the battery bay.
Slide the battery bay latch away from the center of the computer. Then
slide the battery out of the battery bay (see Figure 2).