Dell Latitude XPi CD User manual

Dell
®
Latitude
®
XPi CD
SERVICE MANUAL
®

Information in this manual is subject to change without notice.
1994–1996 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 registered trademarks of Dell Computer Corporation; Microsoft, Windows, and MS-DOS are
registered trademarks of Microsoft Corporation; Intel and Pentium are registered trademarks of Intel 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.
October 1996 P/N 30269

v
Contents
Chapter 1
System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Indicator Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Power/Suspend Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Diskette-Drive Access Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Hard-Disk/CD-ROM Drive Access Indicator. . . . . . . . . . . . . . . . . . . 1-4
PC Card Access Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Low-Battery Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Charging Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Keyboard Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Controlling Computer Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Power States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Interrupt Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Chapter 2
Initial Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Initial User Contact. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Observing the Boot Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Eliminating Resource Conflicts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

vi
Chapter 3
Beep Codes and Error Messages. . . . . . . . . . . . . . . . . . 3-1
POST Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
System Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Running the Dell Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Chapter 4
Removing and Replacing Parts . . . . . . . . . . . . . . . . . . . 4-1
Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Precautionary Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Screw Identification and Tightening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
ZIF Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Field-Replaceable Parts and Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Hard-Disk Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Memory Compartment Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Memory Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Palmrest Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Trackball Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Keyboard Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Display Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Tilt-Support Foot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Display Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Display Assembly Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Display Assembly Latch and Latch Spring . . . . . . . . . . . . . . . . . . . . . . 4-21
LCD Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
LCD Inverter Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
Hinge Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Display-Assembly Interface Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Microphone/Switch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
Bottom Case Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
Diskette/CD-ROM Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
Deck Buoy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33
Superpart Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34
Reserve Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36
System Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38
Removing the System Board Assembly. . . . . . . . . . . . . . . . . . . . . . 4-39
Replacing the System Board Assembly . . . . . . . . . . . . . . . . . . . . . . 4-40
3.1-V Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41

vii
I/O-Panel Dust Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
Advanced Port Replicator Connector Dust Cover . . . . . . . . . . . . . . . . . 4-43
Audio Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44
Appendix A
Factory Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Precautionary Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Factory Repair Parts and Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Exploded Views of Components and Assemblies . . . . . . . . . . . . . . . . . . . .A-12
Hard-Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-15
CD-ROM Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-16
Diskette Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-16
Palmrest Assembly Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-16
Trackball. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-16
Trackball Interface Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-16
Trackball Button Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-16
Palmrest Brace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-16
Display Assembly Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-17
Display-Assembly EMI Shield. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-17
Display Assembly Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-18
Display Assembly Hinges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-19
System-Board Assembly Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-20
System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-20
Keyboard/Keypad/Mouse Connector Shield . . . . . . . . . . . . . . . . . . . . .A-21
I/O Interface Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-22
I/O Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-23
I/O Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-24
Bottom-Case Assembly Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-25
Main Battery Insulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-25
Power Button and Power-Button Mounting Bracket . . . . . . . . . . . . . . .A-26
Spreader and Keel Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-27
Appendix B
System Setup Options . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Accessing the Dell Control Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1
Accessing the System Setup Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-2
System Setup Screens. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-3

viii
Index
Figures
Figure 1-1. Front View of the Notebook Computer. . . . . . . . . . . . . . . . . . 1-2
Figure 1-2. Back View of the Notebook Computer . . . . . . . . . . . . . . . . . . 1-3
Figure 1-3. Indicator Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Figure 4-1. Computer Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Figure 4-2. Main Battery Assembly Removal . . . . . . . . . . . . . . . . . . . . . . 4-3
Figure 4-3. Screw Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Figure 4-4. Disconnecting an Interface Cable . . . . . . . . . . . . . . . . . . . . . . 4-5
Figure 4-5. Exploded View—Computer . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Figure 4-6. Hard-Disk Drive Assembly Removal . . . . . . . . . . . . . . . . . . . 4-7
Figure 4-7. Memory Compartment Cover Removal . . . . . . . . . . . . . . . . . 4-8
Figure 4-8. Memory Module Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Figure 4-9. Palmrest Assembly Removal. . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Figure 4-10. Palmrest-Assembly Retaining Screws. . . . . . . . . . . . . . . . . . 4-11
Figure 4-11. Trackball Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Figure 4-12. Keyboard Assembly Removal. . . . . . . . . . . . . . . . . . . . . . . . 4-14
Figure 4-13. Tilt-Support Foot Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Figure 4-14. Display Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Figure 4-15. Display Assembly Bezel Removal . . . . . . . . . . . . . . . . . . . . 4-20
Figure 4-16. Display Assembly Latch and Latch Spring Removal . . . . . . 4-21
Figure 4-17. LCD Panel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
Figure 4-18. LCD Inverter Board Removal . . . . . . . . . . . . . . . . . . . . . . . . 4-24
Figure 4-19. Hinge Covers Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Figure 4-20. Display-Assembly Interface Cable Removal . . . . . . . . . . . . 4-26
Figure 4-21. Microphone/Switch Assembly Removal. . . . . . . . . . . . . . . . 4-28
Figure 4-22. Bottom Case Assembly Removal . . . . . . . . . . . . . . . . . . . . . 4-30
Figure 4-23. Diskette/CD-ROM Drive Assembly Removal . . . . . . . . . . . 4-31
Figure 4-24. Deck Buoy Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33
Figure 4-25. Superpart Assembly Removal. . . . . . . . . . . . . . . . . . . . . . . . 4-34
Figure 4-26. Reserve Battery Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36
Figure 4-27. System Board Assembly Removal . . . . . . . . . . . . . . . . . . . . 4-38
Figure 4-28. I/O Bracket Clips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40
Figure 4-29. 3.1-V Power Supply Board Removal . . . . . . . . . . . . . . . . . . 4-41
Figure 4-30. I/O-Panel Dust Cover Removal. . . . . . . . . . . . . . . . . . . . . . . 4-42
Figure 4-31. Advanced Port Replicator Connector Dust Cover. . . . . . . . . 4-43
Figure 4-32. Audio Board Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44

ix
Figure A-1. Exploded View—Display Assembly . . . . . . . . . . . . . . . . . . .A-12
Figure A-2. Exploded View—Palmrest Assembly . . . . . . . . . . . . . . . . . .A-13
Figure A-3. Exploded View—Bottom Case Assembly. . . . . . . . . . . . . . .A-14
Figure A-4. Display-Assembly EMI Shield Removal. . . . . . . . . . . . . . . .A-17
Figure A-5. System Board Assembly in the Bottom Case Assembly . . . .A-20
Figure A-6. Keyboard/Keypad/Mouse Connector Shield Removal . . . . .A-21
Figure A-7. I/O Interface Cable Removal . . . . . . . . . . . . . . . . . . . . . . . . .A-22
Figure A-8. I/O Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-23
Figure A-9. I/O Panel Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-24
Figure A-10. Bottom-Case Assembly Components . . . . . . . . . . . . . . . . . .A-25
Figure A-11. Power Button and Power-Button Mounting Bracket
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-26
Figure A-12. Spreader and Keel Plate Removal . . . . . . . . . . . . . . . . . . . . .A-27
Figure B-1. Dell Control Center Icon . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1
Figure B-2. Dell Control Center Window. . . . . . . . . . . . . . . . . . . . . . . . . .B-1
Figure B-3. System Setup Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-3
Tables
Table 1-1. Interrupt Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Table 1-2. Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Table 3-1. POST Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Table 3-2. System Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Table A-1. Factory Repair Parts and Assemblies. . . . . . . . . . . . . . . . . . . .A-2
Table B-1. System Setup Program Categories. . . . . . . . . . . . . . . . . . . . . .B-4

R ead This First
W arnings, Cautions, and Notes
Throughout this manual, there may be blocks of text printed in bold type or in
italic type. These blocks are warnings, cautions, and notes, and they are used as
follows:
NOTE: A NOTE provides helpful information about using the computer system.
A prerequisite for using this manual to service Dell portable computers is a
basic knowledge of IBM®-compatible PCs and prior training in IBM-
compatible PC troubleshooting techniques. In addition to information
provided in this manual, Dell provides the Reference and Troubleshooting
Guide for troubleshooting procedures and instructions on using the Dell
diagnostics to test portable computers, and the online System User’s Guide
for information about system setup and operations.
WARNING: A WARNING indicates the potential for bodily harm and
provides instructions for how to avoid the problem.
CAUTION: A CAUTION indicates either potential damage to hardware
or loss of data and provides instructions for how to avoid the problem.
x

System Overview 1-1
Chapter 1
System Overview
T he Dell®Latitude®XPi CD is a lightweight, expandable portable computer
that use the Intel®Pentium®microprocessor. This chapter provides an overview
of the features and technical specifications of this computer.
S ystem Features
In addition to the standard features found in a Dell portable computer, the Dell
Latitude XPi CD models include the following new features:
•64-bit-wide data bus.
•60-MHz local bus and a 30-MHz PCI bus.
•256-KB pipelined-burst SRAM secondary cache.
•16 MB of nonremovable, EDO-type memory built in to the system board.
Memory can be increased up to 48 MB by installing combinations of 8- and
16-MB fast-page memory modules in the two memory sockets on the sys-
tem board.
•128-bit accelerated graphics adapter with 1.1 MB of integrated video mem-
ory. The integrated video adapter is attached to the PCI bus.
•Full multimedia capability through the following standard features:
— A built-in CD-ROM drive
— MPEG software
— Hardware wavetable support
— SoundBlasterPro-compatible voice and music functions
— Jacks for connecting external speakers, headphones, or a microphone
•Two infrared ports that compatible with the Infrared Data Association
(IrDA) Standard 1.1 (Fast IR) for use with external devices.
•Keyboard with sound and Microsoft®Windows®operating system support.
•Support for two 3.3-V or 5-V PC Cards that adhere to the standards of the
Personal Computer Memory Card International Association (PCMCIA).
The computer supports type I, type II, or type III cards (in any
combination).
For a complete list of system features, see “Technical Specifications” found
later in this chapter.

1-2 Dell Latitude XPi CD Service Manual
P hysical Description
Figure 1-1. Front View of the Notebook Computer
trackball
assembly
diskette drive
main battery assembly
LCD panel
display assembly
latch
indicator panel
tilt-support foot (2)
keyboard
display assembly
speaker
microphone
infrared port
CD-ROM drive
bottom case assembly

System Overview 1-3
Figure 1-2. Back View of the Notebook Computer
Indicator Panel
Figure 1-3. Indicator Panel
PC Card slot
power switch
hard-disk drive
security
cable slot
DC power input connector tilt-support foot
Advanced Port
Replicator connector
indicator panel
I/O panel
infrared port
audio jacks (3)
speaker
LCD panel
power/suspend indicator
diskette-drive access indicator
PC Card access indicator
low-battery indicator
charging indicator
Num Lock indicator
Caps Lock indicator
Scroll Lock indicator
Legend
hard-disk/CD-ROM drive
access indicator

1-4 Dell Latitude XPi CD Service Manual
The portable computer has nine indicators: six on the display assembly’s indica-
tor panel and three on the keyboard assembly. Each of the six indicators on the
display assembly has an identical pair of LEDs: one is visible on the indicator
panel when the display is open, and the other is visible through an aperture on
the outside of the display assembly when the display is fully closed. The sub-
sections that follow describe the functions of the indicators.
Power/Suspend Indicator
The power/suspend indicator is a green LED. After the computer is turned on,
the power/suspend indicator lights up constantly to indicate that the computer is
receiving stable power. When the computer enters suspend mode, the indicator
blinks once approximately every 8 seconds.
Diskette-Drive Access Indicator
The diskette-drive access indicator is a green LED. The indicator lights when
data is being transferred to or from the diskette drive.
Hard-Disk/CD-ROM Drive Access Indicator
The hard-disk/CD-ROM drive access indicator is a green LED. The indicator
lights when data is being transferred to or from the hard-disk drive or the
CD-ROM.
PC Card Access Indicator
The PC Card access indicator is a green LED. The indicator lights when data is
being transferred to or from an installed PC Card (also known as a PCMCIA
card).
Low-Battery Indicator
The low-battery indicator is an amber LED. This indicator is used in conjunc-
tion with the speaker to indicate either of the following low-battery conditions:
•The first low-battery warning occurs when the main battery’s charge has
been depleted to 8 percent of its fully charged condition. The low-battery
indicator turns on and the speaker emits five beeps.
•The second and final low-battery warning occurs when the main battery’s
charge has been depleted to 3 percent of its fully charged condition. The
speaker beeps twice every 1 to 2 seconds for 15 seconds; then the system
does a suspend-to-disk operation automatically before shutting down.
Charging Indicator
The charging indicator is an amber LED. The indicator turns on when the main
battery begins charging and blinks to show the battery is fully charged.

System Overview 1-5
Keyboard Indicators
The keyboard controls the operation of the numeric lock (Num Lock) indicator,
the capitals lock (Caps Lock) indicator, and the Scroll Lock indicator, all of
which are visible through apertures at the top of the keyboard. These indicators
are associated with the <NUM LOCK> key, the <CAPS LOCK> key, and the
<SCROLL LOCK> key; when lit, the LEDs indicate the active state of these
keys.
C ontrolling Computer Power
The power button does not directly control power to the computer. Instead,
when you slide the power button toward the front of the computer and then
release it, the button momentarily closes the power switch on the system board.
The power switch sends a signal to the power management controller, signaling
the controller to initiate a change of state of the computer’s power. The resulting
power state depends on the present power state. The following subsection gives
a description of the power states.
Power States
Sliding the power button toward the front of the computer initiates a change
from the current power state to a different state. The protocols for the power
state changes are as follows:
•If the computer is off (no indicators on) and the display is open and/or an
external monitor is attached to the computer, sliding the power button ini-
tiates a boot operation.
•If the computer is off, if the display is closed, and if no external monitor is
attached, sliding the power button causes the computer to run the POST and
then turn off.
•If the computer is on and the SYSTEM SWITCH option in System Setup is set
to ON/OFF, sliding the power button turns off the computer.
•If the computer is on and the SYSTEM SWITCH option in System Setup is set
to S2D/RFD, sliding the power button causes the computer to enter suspend-
to-disk mode.
•If the computer is in suspend mode (the power/suspend indicator flashes
every 8 seconds), if the SYSTEM SWITCH option in System Setup is set to
ON/OFF, and if the display is open or an external monitor is attached, sliding
the power button turns off the computer.
•If the computer is in suspend mode (the power/suspend indicator flashes
every 8 seconds), if the SYSTEM SWITCH option in System Setup is set to
S2D/RFD, and if the display is open or an external monitor is attached, sliding
the power button causes the computer to enter suspend-to-disk mode.

1-6 Dell Latitude XPi CD Service Manual
•If the computer is in suspend mode (the power/suspend indicator flashes
every 8 seconds), if the display is closed, and if no external monitor is
attached, sliding the power button has no effect on the power state. The
computer remains in suspend mode.
•If the computer is in suspend-to-disk mode, sliding the power button causes
the computer to initiate the resume-from-disk operation.
I nterrupt Assignments
Table 1-1. Interrupt Assignments
IRQ Line Used/Available
IRQ0 Generated by the system timer
IRQ1 Generated by the keyboard controller to signal that the keyboard
output buffer is full
IRQ2 Generated internally by the interrupt controller to enable IRQ8
through IRQ15
IRQ3 Available for use by a PC Card unless the built-in serial port or
infrared port is configured for COM2 (the default)
IRQ4 Available for use by a PC Card unless the built-in serial port is
configured for COM1 (the default)
IRQ5 Available for use by the audio controller
IRQ6 Generated by the diskette drive controller to indicate that the
diskette drive requires the attention of the microprocessor
IRQ7 Available for use by a PC Card or audio controller if the built-in
parallel port is disabled
IRQ8 Generated by the system I/O controller’s RTC
IRQ9 Available for use by the PC Card interrupt controller or the
audio controller
IRQ10 Available for use by a PC Card or audio controller unless the
Advanced Port Replicator is attached
IRQ11 Available for use by a PC Card unless the Advanced Port Repli-
cator is attached
IRQ12 Generated by the keyboard controller to indicate that the output
buffer of the integrated trackball or external PS/2 mouse is full
IRQ13 Reserved for use by the internal coprocessor
IRQ14 Generated by the hard-disk drive to indicate that the drive
requires the attention of the microprocessor
IRQ15 Reserved for the CD-ROM drive

System Overview 1-7
T echnical Specifications
Table 1-2. Technical Specifications
Microprocessor
Microprocessor type . . . . . . . . . . . Intel Pentium microprocessor
Microprocessor speed . . . . . . . . . . 150 MHz
Bus architecture . . . . . . . . . . . . . . PCI
Internal cache memory . . . . . . . . . 16 KB
External cache memory. . . . . . . . . 256 KB pipelined-burst SRAM
Math coprocessor . . . . . . . . . . . . . internal to the microprocessor
Chip Set and Bus
System chip set . . . . . . . . . . . . . . . Pico Power Vesuvius-LS Core Logic
Microprocessor data bus width. . . 64 bits
DRAM bus width . . . . . . . . . . . . . 64 bits
Address bus width. . . . . . . . . . . . . 32 bits
Security EEPROM . . . . . . . . . . . . 256 bytes
Flash EPROM. . . . . . . . . . . . . . . . 256 KB
Local bus. . . . . . . . . . . . . . . . . . . . 60 MHz
PCI bus . . . . . . . . . . . . . . . . . . . . . 30 MHz
PC Card
PC Card controller . . . . . . . . . . . . Texas Instruments PCI1130 CardBus
controller
PC Card connectors . . . . . . . . . . . two (supports type I and type II cards in
any combination; type III cards can be
used only with type I or type II cards)
Cards supported . . . . . . . . . . . . . . 3.3-V and 5-V
PC Card connector size. . . . . . . . . 68 pins
Data width (maximum). . . . . . . . . 32 bits
Memory
Architecture . . . . . . . . . . . . . . . . . EDO memory1
Memory module sockets. . . . . . . . two
1The system supports fast-page-mode memory modules for memory upgrades.

1-8 Dell Latitude XPi CD Service Manual
Memory (Continued)
Memory module type and
capacities . . . . . . . . . . . . . . . . . . . 8- and 16-MB fast-page mode
Standard RAM . . . . . . . . . . . . . . . 16 MB (EDO) on system board
Maximum RAM. . . . . . . . . . . . . . 48 MB
Memory access time:
tRAC . . . . . . . . . . . . . . . . . . . 70 ns
tCAC . . . . . . . . . . . . . . . . . . . 20 ns
BIOS address . . . . . . . . . . . . . . . . F000:0000
Connectors
Serial (DTE) . . . . . . . . . . . . . . . . . one 9-pin connector; 16550-compatible,
16-byte buffer
Parallel . . . . . . . . . . . . . . . . . . . . . one 25-hole connector; unidirectional,
bidirectional, EPP 1.9, or ECP
Monitor. . . . . . . . . . . . . . . . . . . . . one 15-hole connector
PS/2 . . . . . . . . . . . . . . . . . . . . . . . one 6-pin mini-DIN (this connector does
notsupportmorethanonedeviceatatime)
Infrared. . . . . . . . . . . . . . . . . . . . . two ports compatible with IrDA
Standard 1.1 (Fast IR)
Audio . . . . . . . . . . . . . . . . . . . . . . microphone-in
line-in/audio-in
headphones/speakers
Advanced Port Replicator . . . . . . 200-pin connector
Audio
Audio type . . . . . . . . . . . . . . . . . . SoundBlasterPro-compatible 3.01
voice and music functions
Audio controller . . . . . . . . . . . . . . ES1888
ES690 wavetable music synthesizer,
ES938 3D audio spatializer
Stereo conversion. . . . . . . . . . . . . 16 bit (analog-to-digital and digital-
to-analog)
FM music synthesizer. . . . . . . . . . 20-voice, 72-operator
Table 1-2. Technical Specifications (Continued)

System Overview 1-9
Audio (Continued)
Interfaces:
Internal . . . . . . . . . . . . . . . . . . ISA bus
External. . . . . . . . . . . . . . . . . . stereo line-in minijack
microphone-in minijack
headphones/speakers-out minijack
Speakers . . . . . . . . . . . . . . . . . . . . four 8-ohm speakers
Internal speaker amplifier. . . . . . . 1 W into 8 ohms stereo
Headphones amplifier. . . . . . . . . . 150 mW into 32 ohms stereo
Controls. . . . . . . . . . . . . . . . . . . . . volume can be controlled through key
combinations, software application
menus, or the Speaker window in the Dell
Control Center
Video
Video type. . . . . . . . . . . . . . . . . . . hardware-accelerated, 128-bit PCI
Video controller . . . . . . . . . . . . . . NeoMagic 2090
Integrated video memory . . . . . . . 1.1 MB
Display
Type. . . . . . . . . . . . . . . . . . . . . . . . active-matrix color (TFT)
Dimensions:
Height . . . . . . . . . . . . . . . . . . . 195.0 mm (7.68 inches)
Width. . . . . . . . . . . . . . . . . . . . 272.0 mm (10.7 inches)
Diagonal . . . . . . . . . . . . . . . . . 307.5 mm (12.1 inches)
Maximum resolution. . . . . . . . . . . 800 x 600 pixels; 65,536 colors
Response time (typical) . . . . . . . . 80 ms
Operating angle. . . . . . . . . . . . . . . 0°(closed) to 180°
Dot pitch . . . . . . . . . . . . . . . . . . . . 0.31 mm
Power consumption:
Panel (typical). . . . . . . . . . . . . 0.69 W
Backlight. . . . . . . . . . . . . . . . . 2.10 W
Controls. . . . . . . . . . . . . . . . . . . . . brightnesscanbecontrolledthroughakey
combination, the Display window in the
Dell Control Center, or the System Setup
program
Table 1-2. Technical Specifications (Continued)

1-10 Dell Latitude XPi CD Service Manual
Keyboard
Number of keys . . . . . . . . . . . . . . 85 (U.S., Canada, Korea, Thailand, and
locations that use traditional Chinese);
86 (Europe);
87 (Japan)
Key travel . . . . . . . . . . . . . . . . . . . 3.0 ±0.5 mm (0.12 ±0.02 inch)
Key spacing . . . . . . . . . . . . . . . . . 18.25 mm (0.72 inch)
Layout. . . . . . . . . . . . . . . . . . . . . . QWERTY, AZERTY, Kanji
Battery
Type . . . . . . . . . . . . . . . . . . . . . . . lithium ion
Dimensions:
Height. . . . . . . . . . . . . . . . . . . 20.5 mm (0.81 inch)
Depth . . . . . . . . . . . . . . . . . . . 152.75 mm (6.01 inches)
Width . . . . . . . . . . . . . . . . . . . 78.5 mm (3.09 inches)
Weight. . . . . . . . . . . . . . . . . . . . . . 0.41 kg (0.9 lb)
Voltage . . . . . . . . . . . . . . . . . . . . . 14.4 VDC
Capacity . . . . . . . . . . . . . . . . . . . . 36 WH
Charge time (approximate):2
Computer on. . . . . . . . . . . . . . 2.5 hours
Computer off . . . . . . . . . . . . . 1.5 hours
Operating time(approximate,withno
power management features
enabled)2. . . . . . . . . . . . . . . . . . . . 2 to 3.5 hours (without a CD-ROM drive
in use)
Life span (approximate)2. . . . . . . 400 discharge/charge cycles
Temperature range:
Charge . . . . . . . . . . . . . . . . . . 10° to 40°C (50°to 104°F)
Discharge . . . . . . . . . . . . . . . . 10°to 40°C (50°to 104°F)
Storage . . . . . . . . . . . . . . . . . . –40° to 65°C (–40°to 149°F)
2Battery performance features such as charge time, operating time, and life span can vary according
to the conditions under which the computer and battery are used.
Table 1-2. Technical Specifications (Continued)

System Overview 1-11
Battery (Continued)
NiCad reserve battery:
Voltage . . . . . . . . . . . . . . . . . . 7.2 V
Operating time
(approximate) . . . . . . . . . . . . . 2 minutes (if computer is in battery swap
mode); 40 days (if power is
turned off)
AC Adapter
Input voltage . . . . . . . . . . . . . . . . . 90 to 135 VAC and 164 to 264 VAC
Input current (maximum) . . . . . . . 1.2 A and 0.6 A
Input frequency. . . . . . . . . . . . . . . 47 to 63 Hz
Output current. . . . . . . . . . . . . . . . 4.5 A (maximum);
3.5 A (continuous)
Rated output voltage. . . . . . . . . . . 18.5 VDC
Height . . . . . . . . . . . . . . . . . . . . . . 27.94 mm (1.1 inches)
Width. . . . . . . . . . . . . . . . . . . . . . . 58.42 mm (2.3 inches)
Depth. . . . . . . . . . . . . . . . . . . . . . . 133.35 mm (5.25 inches)
Weight (with cables) . . . . . . . . . . 0.4 kg (0.89 lb)
Temperature range:
Operating . . . . . . . . . . . . . . . . 0°to 40°C (32°to 104°F)
Storage . . . . . . . . . . . . . . . . . . -40°to 70°C (-40°to 158°F)
CD-ROM Drive3
Disc size . . . . . . . . . . . . . . . . . . . . 8 cm and 12 cm (no adapter required)
Data transfer rate:
Sustained. . . . . . . . . . . . . . . . . 900 KB/sec (mode 2 disc)
Burst . . . . . . . . . . . . . . . . . . . . 14.4 MB/sec (PIO mode 3)
Seek time:
Random. . . . . . . . . . . . . . . . . . 200 m/sec
Full-stroke. . . . . . . . . . . . . . . . 500 m/sec
3The CD-ROM drive in your computer may have different specifications.
Table 1-2. Technical Specifications (Continued)

1-12 Dell Latitude XPi CD Service Manual
CD-ROM Drive3 (Continued)
Access time:
Random . . . . . . . . . . . . . . . . . 250 m/sec
Full-stroke . . . . . . . . . . . . . . . 550 m/sec
Memory buffer . . . . . . . . . . . . . . . 128 KB
Physical (Computer)
Height. . . . . . . . . . . . . . . . . . . . . . 63.0 mm (2.48 inches)
Width . . . . . . . . . . . . . . . . . . . . . . 280.9 mm (11.06 inches)
Depth . . . . . . . . . . . . . . . . . . . . . . 233.5 mm (9.19 inches)
Weight (with battery and
hard-disk drive) . . . . . . . . . . . . . . 3.29 kg (7.26 lb)
Environmental
Temperature:
Operating . . . . . . . . . . . . . . . . 10° to 40°C (50°to 104°F)
Storage . . . . . . . . . . . . . . . . . . -40°to 65°C (-40°to 149°F)
Relative humidity (maximum):
Operating . . . . . . . . . . . . . . . . 90% (noncondensing)
Storage . . . . . . . . . . . . . . . . . . 95% (noncondensing)
Maximum vibration:
Operating . . . . . . . . . . . . . . . . 0.51 GRMS, using a random-vibration
spectrum that simulates truck shipment
Storage . . . . . . . . . . . . . . . . . . 1.1 GRMS, using a random-vibration
spectrum that simulates air/truck
shipment
3The CD-ROM drive in your computer may have different specifications.
Table 1-2. Technical Specifications (Continued)