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Chapter 4
Removing and Replacing Parts
T his chapter provides instructions for removing and replacing fieldreplaceable components, assemblies, and subassemblies. For removal and replacement procedures for factory-replaceable parts, see Appendix A,
“Factory Repair Parts.”
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 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 the display assembly. 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 chapter, the locations or directions relative to the computer are as shown in Figure 4-1 unless otherwise specified.
back of computer right side left side
front of computer
Figure 4-1. Computer Orientation
Removing and Replacing Parts 4-1
R
ecommended Tools
Most of the procedures in this guide require the use of one or more of the following tools:
• Small flat-blade screwdriver
• Jeweler’s screwdriver set
• Number 1 magnetized Phillips-head screwdriver
• Number 2 magnetized Phillips-head screwdriver
• Chip-removal tool
• Wrist grounding strap
• Small plastic scribe
• Nut drivers
P
recautionary Measures
WARNING: FOR YOUR PERSONAL SAFETY AND PROTECTION
OF THE EQUIPMENT, PERFORM THE FOLLOWING STEPS IN
THE SEQUENCE LISTED.
Before you start to work on the computer, perform the following steps:
1. Turn off the computer and any attached peripherals.
NOTE: Make sure the computer is turned off and not in suspend-to-disk mode. See “Controlling Computer Power” in Chapter 1.
2. 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.
3. Remove the main battery assembly from the battery compartment.
Slide the battery compartment door downward until it stops (about
3/16 of an inch). Slide the main battery assembly out.
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battery battery door
Figure 4-2. Main Battery Assembly Removal
Part or Assembly Name
Main battery assembly
Order Name
CUS,BTRY,SAR,36WHR,LXP
4. To avoid possible damage to the computer from ESD, ground yourself by attaching a wrist grounding strap to yourself and an unpainted metal surface on the I/O panel.
If a wrist grounding strap is not available, you can discharge static electricity from your body by periodically touching the unpainted metal surface of the I/O panel.
Removing and Replacing Parts 4-3
S
crew Identification and Tightening
A6 (35 mm)
(screw A6 is 35 mm)
35 mm
match length here
Figure 4-3. Screw Identification
CAUTION: It is essential that the correct length screw be used when reinstalling a screw. Otherwise, hardware damage could result. Make sure that the screw is properly aligned with its corresponding hole, and avoid overtightening.
The removal procedure illustrations provide the correct screw length in parentheses next to the screw’s label. Also, a graphic for that length screw is included in the illustration. Match the actual screw to the graphic in the illustration to check for correct length.
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Z
IF Connectors
movable part of connector; do not remove
Figure 4-4. Disconnecting an Interface Cable
Some of the computer’s interface connectors are zero insertion force (ZIF) connectors. These connectors are not removable, but they must be released to disconnect a cable from them.
CAUTION: The ZIF connectors are fragile. To avoid damage, do not apply too much pressure to the movable part of the connector.
To disconnect an interface cable from a ZIF connector, follow these steps:
1. Insert a small flat-blade screwdriver or a chip-removal tool under the movable part of the connector.
If a small flat-blade screwdriver is unavailable, use a chip-removal tool to carefully pry up on first one end of the movable part of the connector and then the other end.
2. Pull gently upward on the movable part of the connector until it releases the interface cable.
3. Grasp the interface cable and pull it out of the connector.
To reconnect an interface cable to a ZIF connector, follow these steps:
1. Use a flat-blade screwdriver or chip-removal tool to open the movable part of the ZIF connector.
2. Orient the end of the interface cable with the ZIF connector, and insert the end of the cable into the connector.
3. While holding the cable in place, close the ZIF connector.
To ensure a firm connection, make sure the ZIF connector is completely closed.
Removing and Replacing Parts 4-5
F
ield-Replaceable Parts and Assemblies
display assembly trackball assembly palmrest assembly
CD-ROM
EMI clip keyboard keyboard EMI clip left tilt-support foot
PC Card superpart assembly dust cover for the Advanced
Port Replicator connector
I/O panel dust cover hard-disk drive assembly bottom case assembly right tilt-support foot main battery memory compartment cover
Figure 4-5. Exploded View—Computer
CD-ROM/diskette drive assembly
The computer is divided into three major assemblies: the palmrest assembly
(which contains the keyboard and the trackball), the display assembly (which contains the LCD), and the bottom case assembly (which contains many of the removable parts).
4-6 Dell Latitude XPi CD Service Manual
The following subsections provide instructions for removing and replacing these parts and assemblies. Some of the instructions are preceded by a table listing the Dell order name for the part or assembly being replaced. A more detailed breakdown of parts and assemblies can be found in Appendix A, “Factory Repair Parts.”
Hard-Disk Drive Assembly
front of computer hard-disk drive drive latch drive door
PC Card slot
Figure 4-6. Hard-Disk Drive Assembly Removal
Part or Assembly Name Order Name
Hard-disk drive assembly CUS,HD,xxxxx,yyMM,zzz,LXP *
* Substitute the drive capacity for xxxxx, the drive height for yy, and the
manufacturer for zzz.
To remove the hard-disk drive assembly, follow these steps:
1. Slide the drive latch toward the front of the computer to release the hard-disk drive assembly from the hard-disk drive bay.
The latch is on the left-front corner of the computer.
2. Grasp the drive door and pull the drive out of the computer.
When reinserting the drive into the drive bay, ensure that the drive latch is open.
Then slide the drive completely into the hard-disk drive bay.
CAUTION: The hard-disk drive is very sensitive to shock. Handle the assembly with care and avoid dropping it even from a height of 1 inch.
Removing and Replacing Parts 4-7
Memory Compartment Cover
memory compartment cover
Figure 4-7. Memory Compartment Cover Removal
Part or Assembly Name
Memory compartment cover
Order Name
CVR,MEM,LXPiCD
To remove the memory compartment cover, follow these steps:
CAUTION: Make sure the work surface is clean to prevent scratching the computer cover.
1. Turn the computer upside down on the work surface.
2. To release the memory compartment cover, press down on the identation in the edge of the cover, and then slide the cover towards the edge of the computer.
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Memory Modules
memory module sockets
Figure 4-8. Memory Module Removal
Part or Assembly Name
Memory module, 4-MB
Memory module, 8-MB
Memory module, 16-MB
Order Name
CUS,MEM,4M,LXP4D/T,LXPi
CUS,MEM,8M,LXP4D/T,LXPi
CUS,MEM,16M,LXP4D/T,LXPi
To remove a memory module, follow these steps:
1. Remove the memory compartment cover.
2. To release a memory module from its socket, gently push outward on each of the memory module’s two metal retaining clips.
The memory module should rotate upward out of its retaining clips.
3. Lift the memory module out of its socket.
Memory modules can be installed only one way. Do not attempt to force the memory module into the socket. Align the notch in one corner of the memory module with the corresponding indent in the memory module socket.
Removing and Replacing Parts 4-9
P
almrest Assembly
The palmrest assembly consists of the trackball and the keyboard.
display assembly keyboard palmrest assembly trackball assembly
CD-ROM EMI clip trackball cable connector JTB connector JKB1 connector JKB2 bottom case assembly
Figure 4-9. Palmrest Assembly Removal
Part or Assembly Name
Palmrest assembly with sound
Order Name
SVC,ASSY,PLMRST,LXPiCD
To remove the palmrest assembly, follow these steps:
1. Remove any installed PC Card(s).
2. Disconnect any cables attached to the audio ports.
3. Remove the hard-disk drive assembly.
CAUTION: Make sure the work surface is clean to prevent scratching the computer cover.
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4. Close the display assembly, and turn the computer upside down on a flat work surface.
5. Remove the three palmrest-assembly retaining screws A1, A2, and A3
(see Figure 4-10).
A2 (35 mm)
A3 (35 mm)
A1 (35 mm)
35 mm
Figure 4-10. Palmrest-Assembly Retaining Screws
6. Turn the computer right-side up on the work surface, and open the display assembly.
NOTE: Remember to support the display assembly with a book or similar object so that the display assembly does not open beyond 180 degrees.
7. Release the palmrest assembly from the bottom case assembly (see Fig- ure 4-9).
To release the palmrest assembly, lift the front of the assembly upward with one hand approximately 1 inch. Then, with the fingers of the other hand, disconnect the trackball cable from LIF connector JTB.
8. Rotate the front of the palmrest assembly towards the display assembly.
9. Disconnect the two keyboard cables from ZIF connectors JKB1 and
JKB2.
10. Carefully lift the palmrest assembly from the bottom case assembly.
The keyboard is captured in the palmrest by snaps and tabs.
Removing and Replacing Parts 4-11
To reseat the palmrest assembly on the bottom case assembly, set the palmrest assembly down, slightly forward of its original position, on top of the bottom case assembly. Then push down on all sides of the palmrest assembly while sliding the assembly toward the back of the computer.
Ensure that the palmrest assembly is properly aligned and fully seated on the bottom case assembly and that all of the mounting tabs are fully engaged. Then close the display assembly, turn the computer upside down on the work surface, and reinstall retaining screws A1, A2, and A3 (see Figure 4-10).
CAUTION: Be careful not to bend the CD-ROM EMI clip. Set the palmrest assembly top side down, when the palmrest assembly is free from the bottom case assembly.
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Trackball Assembly
trackball assembly trackball cable
A5 (6 mm)
A4 (6 mm) palmrest assembly
6 mm
Figure 4-11. Trackball Assembly Removal
Part or Assembly Name
Optical trackball assembly
Order Name
SVC,ASSY,TBALL/SWT,LXPi+
To remove the trackball assembly, follow these steps:
1. Remove the palmrest assembly.
2. Turn the palmrest assembly upside down on a flat work surface.
3. Remove screws A4 and A5.
4. Lift the trackball assembly out of the palmrest assembly.
NOTE: It is not necessary to remove the trackball button board when removing the trackball assembly.
Removing and Replacing Parts 4-13
Keyboard Assembly
press palmrest assembly trackball assembly press keyboard
Figure 4-12. Keyboard Assembly Removal
Part or Assembly Name
Keyboard assembly, Belgium
Keyboard assembly, China
Keyboard assembly, domestic
Keyboard assembly, Danish
Keyboard assembly, French
Order Name
KYBD,86,BEL,ALPS,LXPi+
KYBD,85,CHI,ALPS,LXPi+
SVC,KYBD,85,DOM,LXPi+
KYBD,86,DEN,ALPS,LXPi+
KYBD,86,FR,ALPS,LXPi+
Keyboard assembly, French/
Canadian
Keyboard assembly, German
KYBD,85,FR,CAN,ALPS,LXPi+
Keyboard assembly, Japan
Keyboard assembly, Korean
KYBD,86,GER,ALPS,LXPi+
KYBD,87,JPN,LXPi+
KYBD,85,KOREA,ALPS,LXPi+
Keyboard assembly, Latin American KYBD,86,LTN,ALPS,LXPi+
Keyboard assembly, Norwegian
Keyboard assembly, Russian
Keyboard assembly, Spanish
Keyboard assembly, Swedish
KYBD,86,NOR,ALPS,LXPi+
KYBD,86,RUS,ALPS,LXPi+
KYBD,86,SPN,ALPS,LXPi+
KYBD,86,SWE,ALPS,LXPi+
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Part or Assembly Name
Keyboard assembly, Swiss
Keyboard assembly, Thailand
Keyboard assembly, United
Kingdom
Order Name
KYBD,86,SWI,ALPS,LXPi+
KYBD,85,THAI,ALPS,LXPi+
KYBD,84,UK,LXPi+
To remove the keyboard assembly, follow these steps:
1. Remove the palmrest assembly.
2. Press along the sides of the keyboard to release the keyboard from the palmrest assembly.
Removing and Replacing Parts 4-15
D
isplay Assembly
For removal procedures, the display assembly consists of the following:
• Tilt-support foot
• Display assembly bezel
• Display assembly latch and latch spring
• LCD panel
• LCD inverter board
• Hinge covers
• Display-assembly interface cable
• Microphone/switch assembly
Tilt-Support Foot
right tilt-support foot tab
10 mm finger-access recess foot retaining screw (10 mm) cover
Figure 4-13. Tilt-Support Foot Removal
Part or Assembly Name
Tilt-support foot, left
Tilt-support foot, right notch
Order Name
FOOT,PLSTC,REAR,LF,LXPiCD
FOOT,PLSTC,REAR,RT,LXPiCD
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To remove a tilt-support foot, follow these steps:
1. Close the display assembly.
2. With the foot set to its fully retracted position, insert a small device
(such as a scribe) into the bottom notch on the foot-retaining screw cover and gently lift out the cover partway. Lift on the sides of the cover, working around to the top, and then lift out the cover.
3. Remove the foot retaining screw.
The foot retaining screw also functions as a mounting screw for one of the display assembly hinges, which has a threaded hole for the screw.
Therefore, the foot retaining screws cannot be reinstalled with the display assembly removed.
The foot-retaining screw cover can fit only one way in the foot. To reinstall the cover, make sure the tilt-support foot is in its fully retracted position.
Then orient the cover with the notch toward the bottom of the computer and its mounting tab toward the top of the computer. Press in on the cover until it snaps into place.
Removing and Replacing Parts 4-17
Display Assembly
left tilt-support foot connector JLCD
6 mm
C1 (6 mm)
C2 (6 mm) display assembly detent post connector JMIC right tilt-support foot
Figure 4-14. Display Assembly Removal
Part or Assembly Name
Display assembly
Order Name
ASSY,LCD,TFT,SVGA,12.1”,
LXPiCD
To remove the display assembly, follow these steps:
1. Remove the palmrest assembly.
2. Remove the computer’s tilt-support feet.
3. Remove interface-cable grounding screws C1 and C2 from the display assembly.
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4. Disconnect the display-assembly interface cable from connector JLCD on the system board.
To disconnect the cable, grasp the pull tab and pull it straight up from the system board.
5. Disconnect the microphone cable from ZIF connector JMIC.
6. Lift the display assembly from the bottom case assembly.
A plastic detent post located approximately at the center of the display assembly may hang on the bottom case assembly. If so, carefully push the center of the display assembly away from the bottom case assembly.
Removing and Replacing Parts 4-19
l
Display Assembly Bezel
display assembly bezel screw covers (4)
H2 (10 mm) display assembly base
H1 (10 mm)
H3 (10 mm) hinge
10 mm
Figure 4-15. Display Assembly Bezel Removal
H4 (10 mm)
Part or Assembly Name
Bezel service kit, 12.1-inch
Order Name
SVC,BZL,LCD,TFT,LXPiCD
Display case service kit, 12.1-inch SVC,CVR,BK,TFT,LXPi+
To remove the display assembly bezel, follow these steps:
1. Use a scribe to pry the retaining screw covers out of the screw holes in the bezel.
2. Remove retaining screws H1, H2, H3, and H4.
3. Separate the bezel from the display assembly.
Insert your fingertips between the bezel and the LCD, and lift upward on the bezel to release the hidden tabs just above the indicator panel, as well as the hidden tabs beneath each side of the bezel. Then slide the bezel toward the front of the computer, and lift it up and away from the display assembly.
When replacing the bezel, orient the bezel in its original position on the display assembly and press firmly near each tab until it snaps into position. Be careful to have the display latch and spring properly assembled.
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Display Assembly Latch and Latch Spring
latch spring latch display assembly bezel
Figure 4-16. Display Assembly Latch and Latch Spring Removal
Part or Assembly Name
Display assembly latch
Display assembly latch spring
Order Name
LTCH,LXPiCD
SPR,LTCH,LXPiCD
To remove the display assembly latch and latch spring, follow these steps:
1. Remove the display assembly bezel.
2. Turn the display assembly bezel upside down on the work surface.
3. While holding down the display-assembly latch spring, slide the latch against the spring, rotate the latch upward, and lift the latch and spring out of the bezel.
Removing and Replacing Parts 4-21
LCD Panel
interface cable interface connector
LCD inverter board
LCD panel
LCD power cable connector CN2 display assembly case
Figure 4-17. LCD Panel Removal
Part or Assembly Name Order Name
LCD panel LCD,TFT,SVGA,12.1”,SAMSUNG
LCD assembly, LCD inverter board, active-matrix color, TFT SVGA display
SVC,LCD/INVTR,TFT,LXPiCD
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To remove the LCD panel, follow these steps:
1. Remove the display assembly bezel.
2. Lift the lower edge of the LCD panel about 1 inch.
3. Disconnect the LCD-assembly power cable from connector CN2 on the
LCD inverter board.
4. Lift the lower edge of the LCD panel approximately 3 inches.
5. Disconnect the display-assembly interface cable from the LCD interface connector on the underside of the LCD panel.
6. Lift the LCD panel out of the display assembly case.
Removing and Replacing Parts 4-23
LCD Inverter Board
I1 (5 mm)
I2 (5 mm) retaining bracket connector CN1 inverter board
5 mm connector CN2
LED board display assembly case
Figure 4-18. LCD Inverter Board Removal
Part or Assembly Name
LCD inverter board
Order Name
ASSY,BD,INVRTR,TFT,SVGA12.1”
To remove the LCD inverter board, follow these steps:
1. Remove the display assembly bezel.
2. Remove screws I1 and I2 securing the display-interface cable retaining bracket, and then remove the bracket.
3. Move the LED board out of the display assembly case far enough to gain access to the LCD inverter board.
4. Disconnect the LCD-inverter board interface cable from ZIF connector
CN1 on the LCD inverter board.
5. Lift the LCD inverter board about 1/4 of an inch.
6. Disconnect the LCD power cable from connector CN2 on the LCD inverter board.
7. Lift the LCD inverter board out of the display assembly case.
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Hinge Covers
display assembly base hinge cover hinge
Figure 4-19. Hinge Covers Removal
Each of the hinge covers is held in place by three tabs that fit into slots on the display assembly base. The microphone is inside the right hinge cover. To remove the hinge covers, follow these steps:
1. Remove the display assembly from the computer.
2. Place the display assembly faceup on the work surface.
3. Rotate the display assembly base until the display assembly hinges are pointing upward at approximately a 45-degree angle.
4. To remove a hinge cover, press in on the front of the cover to release the hinge cover’s front tab. Then rotate the cover in the direction of the arrow, and lift the cover away from the display assembly base.
To replace the hinge covers, set the display assembly base in the position shown, and reinsert the hinge cover into its original position, making sure that its two tab slots engage the tabs on the display assembly base. Then rotate the hinge cover opposite to the direction shown in Figure 4-18 until its front tab engages the tab slot in the display assembly base.
Removing and Replacing Parts 4-25
Display-Assembly Interface Cable
I1 (5 mm)
I2 (5 mm) display-assembly interface cable retaining bracket bobbin connector CN1
5 mm
LED board alignment marks on cable alignment notch in shoulder
Figure 4-20. Display-Assembly Interface Cable Removal
Part or Assembly Name Order Name
LCD cables, active-matrix, TFT
SVGA display (includes displayassembly interface, LED board, and
LCD-inverter-board interface cables)
SVC,CBL,LCD,TFT,SAMSUNG,
LXPiCD
The display-assembly interface cable connects the system board, LCD panel,
LCD inverter board, and LED board. The cable wraps around a bobbin. To remove the display-assembly interface cable, follow these steps:
1. Remove the display assembly.
2. Remove the display assembly bezel.
3. Remove the LCD panel.
4. Remove the left hinge cover.
5. Remove screws I1 and I2 securing the display-interface cable retaining bracket, then remove the bracket.
6. Disconnect the display-assembly interface cable from ZIF connector
CN1 on the LCD inverter board.
4-26 Dell Latitude XPi CD Service Manual
7. Lift the display-assembly interface cable and bobbin out of the display assembly.
NOTE: Some computers have a display-assembly interface cable that detaches from the bobbin. If you have a cable with a permanently attached bobbin, stop here; otherwise, proceed to Step 8.
8. Look at the alignment marks on the display-assembly interface cable, and note the alignment of the cable to the bobbin. Then carefully detach the cable from the bobbin.
A double-sided adhesive strip attaches the cable to the bobbin (see
Figure 4-20).
9. To reattach the display-assembly interface cable to the bobbin, align the marks on the cable with the notch in the shoulder of the bobbin, and then wrap the cable around the bobbin.
If you are installing a new cable, remove the protective cover from the adhesive strip on the new cable. Align the alignment marks on the cable with the notch in the shoulder of the bobbin, and then wrap the cable around the bobbin, making sure it stays between the shoulders of the bobbin. Place the cable and bobbin into the display assembly before attaching the EMI shield.
Removing and Replacing Parts 4-27
Microphone/Switch Assembly
right hinge cover microphone cover microphone/switch assembly magnet switch microphone/switch cable
Figure 4-21. Microphone/Switch Assembly Removal
Part or Assembly Name
Microphone service kit
Order Name
SVC,MIPHN/SWT,LXPiCD
The microphone/switch assembly is inside the right hinge cover. There is a microphone and a magnetic reed switch on the microphone/switch assembly. To remove the microphone/switch assembly, follow these steps:
1. Remove the display assembly.
2. Remove the right hinge cover. (Before doing so, note the correct routing of the microphone cable around the display assembly base.)
3. Remove the microphone cover from the right hinge cover.
4. Open the microphone cover, and remove the microphone/switch assembly.
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B
ottom Case Assembly
The bottom case assembly consists of the following:
• Diskette/CD-ROM assembly
• Deck-buoy
• Superpart assembly
• System board
• 3.1-V power supply board
• I/O-panel dust cover
• Dust cover for the Advanced Port Replicator
• Audio board
Removing and Replacing Parts 4-29
superpart docking EMI clip audio board system board assembly keel plate bottom case assembly memory compartment cover diskette/CD-ROM assembly
Figure 4-22. Bottom Case Assembly Removal
Part or Assembly Name
Bottom case assembly
Order Name
ASSY,CVR,BTM,LXPiCD
I/O bracket clip superpart serial EMI clip superpart assembly
3.1-V power supply
I/O bracket clip spreader plate dust cover for the
Advanced Port
Replicator
I/O panel dust cover
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Diskette/CD-ROM Drive Assembly
CD-ROM flex cable
D3 (2 mm)
D9 (2 mm)
D4 (2 mm)
D1 (4 mm)
D2 (4 mm) bracket
4 mm
2 mm plastic flip lock
CD-ROM drive diskette drive
D5 (2 mm)
D6 (2 mm)
D7 (2 mm)
D8 (2 mm) connector JCDROM connector JFLOP tab
Figure 4-23. Diskette/CD-ROM Drive Assembly Removal
Part or Assembly Name
Diskette drive assembly
CD-ROM drive assembly
Order Name
SVC,ASSY,FD,LXPiCD
SVC,ASSY,CDROM,LXPiCD
To remove the diskette/CD-ROM drive assembly, follow these steps:
1. Remove the palmrest assembly.
2. Remove screws D1 and D2 securing the diskette/CD-ROM drive assembly to the bottom case assembly.
3. Lift the back of the drive assembly slightly, and then slide the drive assembly toward the back of the computer about 1/4 of an inch bottom case assembly
Removing and Replacing Parts 4-31
4. Lift the drive assembly straight up about 1 inch.
The front edge of the drive assembly engages tabs on the bottom case assembly. Make sure the diskette drive assembly is clear of the tab before attempting to lift it out of the bottom case assembly.
CAUTION: Before removing the diskette drive and CD-ROM drive interface cables from connectors JFLOP and JCDROM, release each connector’s plastic flip lock (see Figure 4-23). Do not pull the interface cable from the connector; doing so can ruin the cable’s electrical conductivity.
5. Disconnect the diskette drive and CD-ROM drive interface cables from connectors JFLOP and JCDROM on the system board.
6. Lift the drive assembly out of the bottom case assembly.
When replacing the drive assembly, first connect the two drive interface cables to the system board. Then lower the drive assembly into the bottom case assembly, beginning with its forward edge, so that the diskette drive board fits between the tabs in the corner of the bottom case assembly.
CAUTION: Use care when handling the diskette/CD-ROM drive; it is fragile and will bend if handled improperly. Place the assembly on a flat work surface, and carefully remove the small 2-mm screws. Do not bend either the drives or the bracket. If bending occurs, the diskette or
CD-ROM will not function correctly when inserted in the drive.
To separate the diskette/CD-ROM assembly into a diskette drive and a
CD-ROM drive, remove screws D3 through D9. Lift up the CD-ROM, and remove it from the assembly. Slide the CD-ROM flex cable out of the slot in the bracket that holds the CD-ROM to the diskette drive.
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Deck Buoy
B1 (10 mm)
B2 (10 mm)
B3 (10 mm) deck buoy
10 mm bottom case assembly
Figure 4-24. Deck Buoy Removal
Part or Assembly Name
Deck buoy
Order Name
ASSY,CLMP,THRM,LXPiCD
To remove the deck buoy, follow these steps:
1. Remove the palmrest assembly.
2. Remove the display assembly.
3. Remove the diskette/CD-ROM assembly.
4. Remove screws B1, B2, and B3.
Lift the deck buoy out of the bottom case assembly.
Removing and Replacing Parts 4-33
Superpart Assembly
B4 (25 mm) thermal tape
25 mm superpart assembly bottom case assembly
Figure 4-25. Superpart Assembly Removal
Part or Assembly Name
Superpart assembly
Order Name
SVC,ASSY,FAN/SPKR,
BRKT,LXPiCD
The superpart assembly includes two speakers, two fans, the reserve battery, a printed circuit board for those parts, and an infrared printed circuit board. To remove the superpart assembly, follow these steps:
1. Remove the palmrest assembly.
2. Remove the display assembly.
3. Remove the diskette-drive/CD-ROM assembly.
4. Remove the deck-buoy.
4-34 Dell Latitude XPi CD Service Manual
5. Remove screw B4.
Lift the superpart assembly out of the bottom case assembly.
CAUTION: To prevent tearing the thermal tape, slowly pull the superpart assembly away from the system board.
Removing and Replacing Parts 4-35
Reserve Battery
superpart docking EMI clip connector JRBAT superpart serial EMI clip reserve battery superpart speaker (2) speaker/ fan bracket middle tab speaker (2)
F1 (3 mm)
F2 (3 mm)
F3 (3 mm)
Figure 4-26. Reserve Battery Removal
F4 (3 mm)
Part or Assembly Name
Reserve battery
Order Name
SVC,BTRY,RSRV,LXP
3 mm
CAUTION: The reserve battery provides power to the computer’s RTC and NVRAM when the computer is turned off. Removing the battery causes the computer to lose its date and time information as well as usersettable parameters in the NVRAM. If possible, make a copy of this information before you remove the reserve battery.
4-36 Dell Latitude XPi CD Service Manual
To remove the reserve battery, follow these steps:
1. Remove the palmrest assembly.
2. Remove the superpart assembly.
3. Remove the superpart docking EMI clip and the superpart serial EMI clip.
4. Unplug the battery from connector JRBAT.
5. Place the superpart assembly upside down on a flat work surface.
6. Remove screws F1 through F4.
Remove the speaker/fan bracket protecting the speakers and fan.
CAUTION: When replacing the speaker/fan bracket, be sure to reinstall the middle tab correctly.
7. Lift the battery out of its recess in the superpart assembly.
To free the reserve battery, thread the battery cable and connector through the opening in the plastic superpart assembly.
Removing and Replacing Parts 4-37
System Board Assembly
SB1 (5 mm)
PC Card ejectors
I/O docking EMI clip system board assembly
SB2 (5 mm)
I/O serial EMI clip main battery connector battery compartment
5 mm molded tabs (3)
Figure 4-27. System Board Assembly Removal bottom case assembly
Part or Assembly Name
System board assembly
Order Name
SVC,SYS,PLN,LXPiCD-150ST,
WB,0M
CAUTION: Dell uses the system’s service tag number to maintain a history of the computer and its maintenance services. Do not neglect to transfer the service tag number to the replacement system board assembly (see step 3 of “Replacing the System Board Assembly” found later in this section).
The system board’s BIOS chip contains the system service tag number, which is also visible on a bar-code label on the bottom of the computer. The replacement kit for the system board assembly includes a diskette that provides a utility for transferring the service tag number to the replacement system board assembly.
4-38 Dell Latitude XPi CD Service Manual
Removing the System Board Assembly
To remove the system board assembly, follow these steps:
1. Remove the palmrest assembly.
2. Remove the display assembly.
3. Remove the diskette/CD-ROM assembly.
4. Verify that the PC Card ejectors are fully depressed.
5. Remove the deck buoy plate. (Reinstall this part on the new system board.)
CAUTION: To ensure maximum cooling for the microprocessor, do not touch the heat transfer area on the system board above the microprocessor or on the deck buoy plate. The oils in your skin reduce the heat transfer of the thermal pads.
6. Remove the superpart assembly.
Carefully disengage the superpart docking EMI and serial EMI clips from the I/O docking EMI and serial EMI clips.
7. Remove screws SB1 and SB2, which retain the system board (see
Figure 4-27).
8. Lift the system board approximately 2 inches from the back of the computer.
9. Disengage the front of the system board from the three molded tabs in the bottom case assembly.
The tabs’ approximate location is shown in Figure 4-27. The tabs are located alongside the hard-disk drive compartment, inside the bottom case assembly.
CAUTION: When removing the system board assembly, be careful not to damage the main battery connector and EMI shield on the bottom of the assembly.
10. Lift the system board assembly out of the bottom case assembly.
NOTE: If the main battery insulator comes out with the system board assembly, detach the insulator and set it aside.
Removing and Replacing Parts 4-39
Replacing the System Board Assembly
Observe the following precautions when you reinstall a system board:
1. Before reinstalling the system board assembly, make sure the upper I/O bracket clip and the side I/O bracket clip are in place. If the side I/O bracket clip has been dislodged, reinstall it as shown in Figure 4-27.
CAUTION: To avoid possible damage to the computer, make sure the system board assembly is inserted under the three molded tabs at the front of the bottom case assembly.
I/O bracket clip
Figure 4-28. I/O Bracket Clips
2. While reinstalling the system board assembly, make sure the power button is positioned as far as it will go toward the back of the computer.
This will ensure that the power button engages the power switch properly.
3. Enter the system’s service tag number into the BIOS of the replacement system board assembly.
Insert the diskette that accompanied the replacement system board assembly into the diskette drive, and turn on the computer. Follow the instructions on the display screen.
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3.1-V Power Supply Board
connector JPS1 system board power supply board with insulator connector JPS2 bottom case assembly
Figure 4-29. 3.1-V Power Supply Board Removal
Part or Assembly Name
3.1-V power supply board
Order Name
CRD,PWR SPLY,LXPiCD,V3.1,NBK
To remove the 3.1-V power supply board, follow these steps:
1. Remove the palmrest assembly
2. Remove the superpart assembly.
3. Remove the 3.1-V power supply board from the system board.
The power supply board is held in place on the system board by connectors
JPS1 and JPS2.
Removing and Replacing Parts 4-41
I/O-Panel Dust Cover
pivot pin (2)
I/O-panel dust cover pivot hole (2)
Figure 4-30. I/O-Panel Dust Cover Removal
Part or Assembly Name
I/O-panel dust cover
Order Name
DOOR,PLSTC,I/O,LXP/NBK
To remove the I/O-panel dust cover, follow these steps:
1. Remove the palmrest assembly.
2. Remove the display assembly.
3. Remove the superpart assembly.
4. Remove the system board.
5. Remove the I/O-panel dust cover.
Push outward on one end of the dust cover to release the pivot pin from its associated pivot hole. Then repeat the operation for the other end of the cover. After both ends have been disengaged, lift the dust cover away from the system board assembly.
To replace the I/O-panel dust cover, orient the cover in its original position and snap the pivot pins into place in their associated pivot holes. Make sure the dust cover opens and closes freely before you reinstall the display assembly.
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Advanced Port Replicator Connector Dust Cover
Advanced Port
Replicator connector dust cover
Figure 4-31. Advanced Port Replicator Connector Dust Cover
Part or Assembly Name
Advanced Port Replicator connector dust cover
Order Name
CVR,DOOR,DOCKING,LXP
To remove the dust cover for the Advanced Port Replicator connector, follow these steps:
1. Remove the palmrest assembly.
2. Remove the display assembly.
3. Remove the dust cover.
Removing and Replacing Parts 4-43
Audio Board
hard-disk drive bracket audio board audio connectors connector board system board connector JAUDIO connector JTB
6 mm
HD1 (6 mm)
Figure 4-32. Audio Board Removal
Part or Assembly Name
Audio board
Order Name
PWA,AUDIO,LXPiCD,NBK
To remove the audio board, follow these steps:
1. Remove the palmrest assembly.
2. Remove the display assembly.
3. Remove the superpart assembly.
4. Remove the system board.
5. Remove the hard-disk drive bracket.
Turn the system board over and place it on a flat work surface. Remove screw HD1, which secures the bracket to the system board. Turn the system board over so that the bracket is on the top. Use a plastic scribe or a small flat-blade screwdriver to pry the bracket from connector JTB. Gently push the bracket outward from the system board until the bracket is disengaged from the audio connectors, and lift the bracket away from the system board.
6. Lift the audio board straight up from the system board.
The audio board is held in place on the system board by connector JAUDIO.
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