dell latitude ls portable computers User Manual

							support.dell.com Dell Latitude LS Portable Computers Service Manual 3
Figure 2.  Main Battery Assembly Removal
9. Ground yourself by touching the unpainted metal surface of an I/O 
connector on the back of the computer. 
NOTICE: While you work, periodically touch the I/O panel to           
dissipate any static electricity that might harm components.   
Screw Identification and Tightening
The illustrations in the following removal procedures provide lengths of the 
correct screws for each procedure. Figure 3 shows examples. Match the actual 
screw to the illustration to check for correct length.
Figure 3.  Screw Identification
NOTICE: When reinstalling a screw, you must use a screw of the     
correct length. Otherwise, you could damage the hardware. Make 
sure that the screw is properly aligned with its corresponding hole, 
and avoid overtightening. 
batter y
batter y latch 
						

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When you are removing and replacing components, photocopy the Table 1 
placement mat as a tool to lay out and keep track of the component screws.
Table 1. Screw Placement Mat with Component Screw Counts 
and Sizes
Hard-Disk Drive 
Assembly:
M2 x 4 mm (2 each)
Display Assembly 
Hinge to Base:
M2 x 4 mm (4 each)
Display Assembly 
Bezel:
M2 x 3.5 mm (6 each)
Rubber Screw Covers 
(4 each)
LCD Panel and 
Inverter:
M2 x 3.5 mm (5 each)
Display Assembly 
Hinges:
M2.6 x 4 mm (4 each)
Keyboard 
Assembly:
M2 x 4 mm (4 each)
Palmrest Assembly:
M2.6 x 1.6 mm (6 each 
[battery bay])
M2 x 4 mm (4 each 
[black])
M2 x 6 mm (3 each 
[silver]) 
Touch Pad:
M2 x 3.5 mm (3 each) 
Modem Retainer 
Bracket:
M2 x 8.5 mm (2 each)
VGA and Parallel 
Port :
5 mm socket (4 each)
IDE Connector:
IDE connector screws 
(2 each)Fan:
M2 x 3.5 mm (2 each)
Speaker:
M2 x 3.5 mm (2 each)
Audio I/O Cover:
M2 x 4 mm (2 each)
System Board 
Assembly:
M2 x 3.5 mm (6 each) 
						

							support.dell.com Dell Latitude LS Portable Computers Service Manual 5
ZIF Connectors
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 (see Figure 4).
Figure 4.  Disconnecting an Interface Cable
NOTICE: 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, perform the following 
steps:
1. Insert a small flat-blade screwdriver under the movable part of the 
connector.
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, perform the following 
steps:
1. Use a small flat-blade screwdriver 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.
movable part of 
connector 
(do not remove) 
						

							6 Dell Latitude LS Portable Computers Service Manual
Removing Field-Replaceable Parts 
and Assemblies     
Figure 5.  Exploded View—Computer
The following subsections provide instructions for removing and replacing 
field-replaceable parts and assemblies.
display 
assembly
keyboard
palmrest 
assembly
system board assembly
hard-disk drive
main batterybottom case assembly
right hinge cover
left hinge cover
audio EMI 
shield
audio I/O port cover
keyboard bezel
speaker
fan
APR docking 
doors
modem 
						

							support.dell.com Dell Latitude LS Portable Computers Service Manual 7
Hard-Disk Drive Assembly
Figure 6.  Hard-Disk Drive Assembly Removal 
NOTICE: To avoid damaging the system board, you must remove the 
main battery before you service the computer.
NOTICE: The hard-disk drive is very sensitive to shock. Handle the 
assembly by its edges (do not squeeze the top of the hard-disk drive 
case), and avoid dropping it.
NOTICE: Make sure that the work surface is clean to prevent    
scratching the computer cover.
1. Turn the computer over, and remove the two M2 x 4-mm screws from the 
bottom of the hard-disk drive door (see Figure 6).
The hard-disk drive is located on the right side of the computer.
2. Pull the drive out of the computer.
bottom of computerhard-disk drive M2 x 4-mm screws (2) 
						

							8 Dell Latitude LS Portable Computers Service Manual
Keyboard Bezel
Figure 7.  Keyboard Bezel Removal
NOTICE: To avoid damaging the system board, you must remove the 
main battery before you service the computer.
NOTICE: To avoid damaging the microphone, do not put any objects 
into the microphone hole (see Figure 7).
1. Place the point of a paper clip, a very small flat-blade screwdriver, or a    
tool of similar size in the keyboard bezel hole and carefully push down           
(see Figure 7).
2. While pushing down, slide the keyboard bezel to the left until it releases.
3. Lift the keyboard bezel.
keyboard bezel release hole keyboard bezel
microphone hole 
						

							support.dell.com Dell Latitude LS Portable Computers Service Manual 9
Display Assembly 
Figure 8.  Display Assembly Removal
NOTICE: To avoid damaging the system board, you must remove the 
battery before you service the computer.
1. Remove the keyboard bezel.
2. Close the display.
3. Remove the two M2 x 4-mm screws at the back of the computer that 
secure the display assembly to the bottom case (see Figure 8).
4. Turn the computer upside down on a flat work surface.
LCD flex-cable 
hold-down clip
M2 x 8.5-mm screw
right hinge
cover
LCD flex cable
M2 x 4-mm screws (4)
display assembly
left hinge cover 
						

							10 Dell Latitude LS Portable Computers Service Manual
5. Remove the two M2 x 4-mm screws at the bottom of the computer that 
secure the display assembly to the bottom case (see Figure 8).
6. Turn the computer right-side up.
7. Open the display.
8. Remove the left and right hinge covers.
NOTE: When replacing the display assembly, the left hinge cover must go 
over the left hinge and the right hinge cover must go over the right hinge. 
They are not interchangeable. An L is stamped on the bottom of the left 
hinge cover and an R is stamped on the bottom of the right hinge cover.
9. Remove the M2 x 8.5-mm screw that secures the LCD flex-cable          
hold-down clip and the LCD flex-cable connector to the system board 
assembly (see Figure 8).
The M2 x 8.5-mm screw also secures the left side of the modem retainer 
bracket to the system board assembly.
10. Carefully disconnect the LCD flex-cable connector from the system board.
11. Lift the display assembly from the bottom assembly.
To replace the display assembly, perform the following steps: 
1. Place the display assembly on the bottom assembly.
Insert the left and right hinge posts into the holes at the top of the palm 
rest.
2. Carefully connect the  LCD flex cable to the connector on the system 
board.
3. Place the LCD flex-cable hold-down clip over the LCD flex-cable connector.
The word up is stamped on the top of the clip (see Figure 8).
The tab at the left of the clip should go under the palm rest, and the screw 
hole on the right side of the clip should line up with the holes in the 
connector ground strip and the threaded hole in the system board. 
4. Reinstall the M2 x 8.5-mm screw that secures the LCD flex-cable           
hold-down clip to the system board.
5. Close the display.
You may have to press down on the back end of the display (above the 
hinges) while closing the display to get the display to close completely. 
						

							support.dell.com Dell Latitude LS Portable Computers Service Manual 11
6. Reinstall the two M2 x 4-mm screws that secure the display assembly to 
the bottom case.
You may have to squeeze the display assembly and the bottom assembly 
together, so the screw holes align in the base assembly and the hinge 
posts.
Do not completely tighten the screws.
7. Reinstall the two M2 x 4-mm screws in the back of the computer that 
secure the display assembly to the back of the bottom case.
8. Tighten the two screws that you installed in step 6.
9. Open the display and reinstall the left and right hinge covers.
An L is stamped on the bottom of the left hinge cover and an R is stamped 
on the bottom of the right hinge cover. 
						

							12 Dell Latitude LS Portable Computers Service Manual
Display Assembly Bezel
l
Figure 9.  Display Assembly Bezel Removal
NOTICE: To avoid damaging the system board, you must remove the 
main battery before you service the computer.
1. Use a scribe to carefully pry the six rubber screw covers out of the six 
screw holes located along the top and bottom of the bezel on the front of 
the display assembly (see Figure 9).
2. Remove the six M2 x 3.5-mm screws located at the top and bottom of the 
bezel on the front of the display assembly (see Figure 9).
LCD panel
display-assembly top cover
inverter
display assembly bezellarge rubber screw covers (6)
M2 x 3.5-mm screws (6)
latch
left hinge
right hingeM2.6 x 4-mm screws (4)
M2 x 3.5-mm screw
back light
plug