Dell Inspiron Xpi Cd Service Guide

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

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....

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  key, the  key, and the 
 key; when lit, the LEDs indicate the active state of these 
keys.
Controlling Computer Power  
The power button does not directly control power to the computer. Instead, 
when...

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.
Interrupt Assignments
Table 1-1.  Interrupt Assignments
IRQ Line...

System Overview 1-7
Technical 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 . . . . . . . . . ....

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) . . . . . . . . . . . . . . ....

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...

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:...

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 . . . . . . . . . . . . . . . ....

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...