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Dell Latitude LS Portable Computers Service Manual

23

8. Disconnect the flex cable from the ZIF connector on the back of the touch

pad (see Figure 16).

The flex cable remains attached to the touch pad holder assembly.

Bottom Assembly

Figure 17. Bottom Assembly

The bottom assembly consists of the following field-replaceable components:

•

Reserve battery

•

RTC battery

•

Main battery

•

Modem

•

Fan assembly

•

Speaker

•

System board assembly

•

Main battery release latch

•

Bottom case assembly

reserve
battery

fan

main battery
compartment

system board
assembly

bottom
case cover

main battery release
latch location

RTC battery

modem

speaker (shown with audio
EMI shield removed)

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Summary of Contents for Latitude LS

Page 1: ...Thank you for purchasing this Factory Service Manual CD DVD from servicemanuals4u com Please check out our eBay auctions for more great deals on Factory Service Manuals servicemanuals4u ...

Page 2: ...www dell com Dell Latitude LS Portable Computers SERVICE MANUAL ...

Page 3: ......

Page 4: ...www dell com Dell Latitude LS Portable Computers SERVICE MANUAL ...

Page 5: ...r Corporation is strictly forbidden Trademarks used in this text Dell the DELL logo and Latitude are trademarks of Dell Computer 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 ...

Page 6: ...ssembly 7 Keyboard Bezel 8 Display Assembly 9 Display Assembly Bezel 12 Display Assembly Latch 13 LCD Panel 14 Display Assembly Hinges 16 Keyboard Assembly 17 Memory Module 19 Palmrest Assembly 20 Touch Pad Assembly 22 Bottom Assembly 23 Reserve Battery 24 RTC Battery 24 Main Battery 25 Modem 25 Fan 27 Speaker 28 System Board Assembly 30 Main Battery Release Latch 33 APR Docking Doors 34 Index ...

Page 7: ...igure 11 LCD Panel Removal 14 Figure 12 Keyboard Assembly Removal 17 Figure 13 Memory Module Removal 19 Figure 14 Removing the Palmrest Assembly Bottom Screws 20 Figure 15 Removing the Palmrest Assembly Top Screws 21 Figure 16 Touch Pad Removal 22 Figure 17 Bottom Assembly 23 Figure 18 Reserve Battery Removal 24 Figure 19 Modem Removal 25 Figure 20 Fan Removal 27 Figure 21 Speaker Removal 28 Figur...

Page 8: ...vii ...

Page 9: ...system Notes Notices and Cautions 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 notices and cautions and they are used as follows NOTE A NOTE indicates important information that helps you make better use of your computer system NOTICE A NOTICE indicates either potential damage to hardware or loss of data and te...

Page 10: ...e peripherals are disconnected from the I O panel on the back and right side of the computer A part can be replaced by performing the removal procedure in reverse order unless otherwise noted 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 exceed 180 degrees Also when p...

Page 11: ...ress the power button for 4 seconds 3 If the computer is docked in the LS Advanced Port Replicator APR undock the computer 4 Disconnect the computer and any attached peripherals from their electrical outlets to reduce the potential for personal injury or shock Also disconnect any telephone or telecommunications lines from the computer 5 Remove the power cable 6 Disconnect all other external cables...

Page 12: ...rm 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 hardwar...

Page 13: ...ay 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 Co...

Page 14: ... 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 th...

Page 15: ...wing subsections provide instructions for removing and replacing field replaceable parts and assemblies display assembly keyboard palmrest assembly system board assembly hard disk drive main battery bottom case assembly right hinge cover left hinge cover audio EMI shield audio I O port cover keyboard bezel speaker fan APR docking doors modem ...

Page 16: ...sitive 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...

Page 17: ... 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 ...

Page 18: ...efore 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 ...

Page 19: ... 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 syste...

Page 20: ... 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 ...

Page 21: ...ber 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 bezel large rubber screw covers 6 M2 x 3 5 mm screws 6 latch left hi...

Page 22: ...ay assembly latch of off the display assembly top cover see Figure 10 3 Slide the latch spring off of the post on the display assembly top cover see Figure 10 You may need to use a small flat blade screwdriver to separate the latch spring from the post To replace the display assembly latch perform the following steps 1 Carefully place the latch spring over the post on the display assembly top cove...

Page 23: ...Remove the display assembly 4 Remove the display assembly bezel 5 Remove the four M2 x 3 5 mm screws on the left and right sides of the display assembly that secure the LCD panel to the top cover see Figure 11 6 Remove the M2 x 3 5 mm screw that secures the inverter to the top cover 7 Lift and roll the inverter over toward you so the bezel side is down see Figure 11 LCD panel wide flex cable narro...

Page 24: ...he following steps 1 Connect the LCD flex cable to the connector on the back of the LCD panel 2 Reinstall the tape that covers the LCD flex cable connector on the back of the LCD panel 3 If you are installing a new LCD flex cable peel off the backing tapes that are on the LCD flex cable EMI sponges 4 Reinstall the LCD panel in the top cover a Holding the LCD flex cable against the back of the LCD ...

Page 25: ...r with the alignment holes in the inverter 9 Holding the inverter in place reinstall the M2 x 3 5 mm screw that secures the inverter to the top cover 10 Reinstall the four M2 x 3 5 mm screws in the left and right ends of the top cover that secure the LCD panel to the top cover 11 Reinstall the display assembly latch 12 Reinstall the display assembly bezel Display Assembly Hinges 1 Remove the keybo...

Page 26: ...puter cover 1 Remove the keyboard bezel 2 Remove the four M2 x 4 mm screws located across the top of the keyboard assembly see Figure 9 NOTE Five metal tabs retain the bottom of the keyboard in the palmrest assembly 3 Release the keyboard assembly from the palmrest assembly by lifting the top edge of the keyboard assembly up and sliding it toward the back of the computer 4 Rotate the keyboard up s...

Page 27: ...rd assembly fit correctly into the slotted holes in the palmrest assembly To help align the tabs with the slotted holes you can temporarily insert the hard disk drive into the hard disk drive bay before you place the keyboard assembly in the palmrest assembly By resting the keyboard assembly on the hard disk drive the tabs will be at the correct height to enter the slotted holes When the keyboard ...

Page 28: ... socket just far enough for the memory module to disengage from the socket it should pop up slightly see Figure 13 5 Lift the memory module out of its socket To replace a memory module perform the following steps 1 Align the memory module s edge connector with the slot in the center of the memory module socket The memory module is keyed or designed to fit into the socket in only one direction The ...

Page 29: ...id damaging the system board you must remove the main battery before you service the computer 1 Remove the keyboard bezel 2 Remove the display assembly 3 Remove the keyboard assembly 4 Turn the computer upside down on a flat work surface 5 Remove the six M2 6 x 1 6 mm screws located in the battery bay see Figure 14 NOTICE Make sure that the work surface is clean to prevent scratching the computer ...

Page 30: ...IF connector on the system board 10 Disconnect the touch pad flex cable from the ZIF connector on the system board 11 Carefully remove the palmrest assembly from the bottom assembly To replace the palmrest assembly perform the following steps 1 Place the palmrest assembly on the bottom assembly 2 Reinstall the three silver M2 x 6 mm screws in the keyboard assembly area that secure the middle of th...

Page 31: ...assembly to the bottom case assembly see Figure 14 8 Turn the computer right side up 9 Reinstall the keyboard assembly 10 Reinstall the display assembly 11 Reinstall the keyboard bezel Touch Pad Assembly Figure 16 Touch Pad Removal 1 Remove the keyboard bezel 2 Remove the display assembly 3 Remove the keyboard assembly 4 Remove the palmrest assembly 5 Remove the three M2 x 3 5 mm screws that secur...

Page 32: ...tom Assembly Figure 17 Bottom Assembly The bottom assembly consists of the following field replaceable components Reserve battery RTC battery Main battery Modem Fan assembly Speaker System board assembly Main battery release latch Bottom case assembly reserve battery fan main battery compartment system board assembly bottom case cover main battery release latch location RTC battery modem speaker s...

Page 33: ...ery away from the foam pad on the system board see Figure 18 The reserve battery is located between the memory module and the PC card bay and is attached to the system board with an adhesive foam pad 4 Disconnect the reserve battery cable from the connector on the system board 5 Remove the remnants of the foam pad from the system board RTC Battery NOTICE Removing the real time clock RTC battery ca...

Page 34: ...r removing the battery Modem Figure 19 Modem Removal 1 Remove the keyboard bezel 2 Remove the display assembly 3 Remove the keyboard assembly 4 Remove the palmrest assembly 5 Use a 5 mm socket wrench to remove the four 5 mm socket screws for the VGA and parallel ports located on the back of the bottom assembly 6 Use a small flat blade screwdriver to remove the two integrated drive electronics IDE ...

Page 35: ...onnector on the system board 2 Align the connector on the bottom of the modem with the connector on the system board and carefully press the modem onto the system board 3 Put the modem retainer bracket in place 4 Reinstall the M2 x 8 5 mm screw to secure the modem retainer bracket and modem to the system board 5 Reinstall the two IDE connector screws at both ends of the IDE media bay connector loc...

Page 36: ... fit into the female connector one way only 6 Remove the two M2 x 3 5 mm screws that secure the fan to the bottom assembly see Figure 20 7 Remove the fan from the bottom assembly To replace the fan perform the following steps 1 Place the fan in the bottom case Make sure that the arrow that is stamped on top of the fan is pointing towards the thermal cooling solution 2 Reinstall the M2 x 3 5 mm scr...

Page 37: ...re maximum cooling for the microprocessor do not touch the glue side of the thermal conductive tape The oils in your skin reduce the heat transfer capability on the glue side of the tape 5 Peel up the EMI adhesive sponge that connects the audio EMI shield to the thermal cooling solution see Figure 21 You only need to peel up the part of the sponge that lays on the thermal cooling solution The end ...

Page 38: ...mbly 9 Remove the speaker from the bottom assembly 10 Remove the rubber speaker gasket from the bottom assembly To replace the speaker perform the following steps 1 Reinstall the rubber speaker gasket in the bottom case The gasket is keyed so it will fit in the bottom case one way only 2 Place the speaker in the bottom case 3 The wire end of the speaker should face towards the center of the bottom...

Page 39: ...em board assembly perform the following steps NOTICE To avoid damaging the system board you must remove the main battery before you service the computer PC Card cover system board fan assembly M2 x 8 5 mm screw audio I O port cover audio EMI shield fan wire connector M2 x 4 mm screws 2 thermal cooling solution M2 x 3 5 mm screws 6 modem retainer bracket modem reserve battery RTC battery bottom cas...

Page 40: ...al cooling solution see Figure 22 You only need to peel up the part of the sponge that lays on the thermal cooling solution The end of the sponge that lays on the audio EMI shield can remain NOTICE The audio EMI shield is attached to the USB connector housing with two sided tape To avoid bending the audio EMI shield care must be taken when separating the audio EMI shield from the USB connector hou...

Page 41: ...ould protrude comfortably through the openings at the back of the bottom case assembly 4 Reconnect the fan wire to the connector on the system board assembly 5 Reconnect the speaker wire to the connector on the system board assembly 6 Replace the modem retainer bracket around the I O ports and on top of the modem 7 Reinstall the M2 x 8 5 mm screw on the right side of the modem to secure the modem ...

Page 42: ...th ends of the IDE media bay connector located on the back of the bottom case assembly 11 Reinstall the four 5 mm socket screws for the VGA and parallel ports located on the back of the bottom case assembly 12 Replace the audio I O cover 13 Replace the two M2 x 4 mm screws to secure the audio I O cover to the bottom case assembly 14 Reinstall the palmrest assembly 15 Reinstall the keyboard assembl...

Page 43: ...ge of the door opening on the right side There is a small slot at the right edge of the door opening to show where the screwdriver is placed 3 Gently push the screw driver against the right edge of the back door to cause the door to bow up at their center 4 Grasp the back door as it bows up while still pressing the door edge with the screwdriver 5 Carefully slip the right edge hinge of the back do...

Page 44: ...on spring is to the left 1 Turn the computer upside down The APR connector door opening should be at the top 2 Holding the two doors together at their right edges insert the left hinges of the doors at the end with the tension spring onto the left front and back hinge pins 3 Carefully bow the doors in the center 4 Slip the right hinge of the back door on to the right back hinge pin 5 Slip the righ...

Page 45: ...36 Dell Latitude LS Portable Computers Service Manual ...

Page 46: ...3 removal 9 F fan removal 27 field replaceable parts and assemblies illustrated 6 G grounding to dissipate static electricity 3 H hard disk drive assembly removal 7 hinge removal 16 K keyboard assembly removal 17 L latch removal 13 LCD panel removal 14 M main battery release latch removal 34 removal 3 25 memory module removal 19 modem removal 25 P palmrest assembly removal 20 ...

Page 47: ...mputers Service Manual R reserve battery removal 24 RTC battery removal 24 S screw identification and tightening 3 speaker removal 28 system board assembly illustration 30 removal 30 T tools 2 touch pad removal 22 Z ZIF connectors 5 ...

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Page 49: ... www dell com Printed in the U S A P N 3538U Rev A00 3538U ...

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