Dell™ Latitude™ CPt V/CPt S Series and CPx H/CPx J Series

Dell™ Latitude™ CPt V/CPt S Series and CPx H/CPx J Series

Information in this document is subject to change without notice. @ 2000 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 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.

February 2000 P/N 64PTN Rev. A00

Contents

Recommended Tools........... eee ene 2 Preparing to Work Inside Your Computer ............................ 2 Before Working Inside Your Computer ........................ 2

Screw Identification............................................. 3 Disconnecting Interface Connectors................................ 5 Removing a Cable from a ZIF Interface Connector............... 5 Replacing a Cable into a ZIF Interface Connector ................ 5 Field-Replaceable Parts and Assemblies ee eee 6 Removing and Replacing Field-Replaceable Parts and Assemblies ....... 10 Hard-Disk Drive Assembly.................................... 11 Removing the Hard-Disk Drive Assembly ...................... 11 Replacing the Hard-Disk Drive Assembly ..................... 11

Modular Bay Devices (Diskette Drive, CD-ROM Drive, DVD-ROM Drive, CD-RW Drive, SuperDisk LS-120 Drive, Battery, or Travel Module) ....12

Memory Module Cover ...................................... 12 Removing the Memory Module Cover ....................... 12 Memory Modules .......................................... 13 Removing the Memory Modules............................ 13 Replacing the Memory Modules............................ 13 Keyboard Assembly.................................uususn.. 14 Removing the Keyboard Assembly .......................... 14 Replacing the Keyboard Assembly .......................... 16 Microprocessor Module...................................... 18 Removing the Microprocessor Module....................... 18 Replacing the Microprocessor Module ....................... 19 Display Assembly un. 20 Removing the Display Assembly............................ 20 14.1-Inch Display Assembly Bezeland LCD Panel ................. 21 Removing the 14.1-Inch Display Assembly Bezel............... 21 Removing the14.1-Inch LCD Panel .......................... 22 Removing the 14.1-Inch LCD Flek Cable...................... 22 Replacing the 14.1-Inch LCD Flex Cable ...................... 23

Replacing the 14.1-Inch LCD Panel.......................... 24

Vi

Index

Figures

aT Tl ה ו ה ה ה‎ TI AT הח‎ TA חר ה‎ ST) HA

12.1-Inch Display Assembly Bezel and LCD Panel ................. 25

Removing the 12.1-Inch Display Assembly Bezel............... 25 Removing the 12.1-Inch LCD Panel Inverter ........0.. 26 Removing the 12.1-Inch LCD Flek Cable...................... 26 Replacing the 12.1-Inch LCD Fler Cable ....................... 26 Replacing the 12.1-Inch LCD Panel Inverter ................... 27 Replacing the 12.1-Inch LCD Panel ......................... 28 Display Assembly Latch...................................... 29 התה₪ בק‎ 30 Removing the Palmrest Assembly .......................... 30 0500 0 פיפ ל רצ ב‎ bA ES 32 Removing the Reserve Battery .......... eea 32 Modem:Assembly! 3.4.2 Sob IN Se BSA ae LAR EE ALG EEE Ate 33 Removingthe Modem Assembly ........................... 33 Replacing the Modem Assembly............................ 33 System ה‎ 50 IAE AUA 34 Removing the System Board............................... 34 Replacing the System Board........... eee 35 Thermal Cooling | כ‎ 0 04 See beads bite Sie 36 Module Latch Assemblies.................................... 37 gure 1. Computer Ona AA IAA IA 1 gure 2. Main Battery Removal................................ 3 gure 3. Screw Identification ................................. 3 gure 4. Disconnecting a Cable from an Interface Connector ........ b gure 5. Exploded View—Computer........................... 10 gure 6. Hard-Disk Drive Assembly Removal.................... 11 gure 7. Modular Bay Device Removal......................... 12 gure 8. Memory Module Removal ........................... 13 gure 9. Removing the Keyboard Assembly Screws .............. 14 gure 10. Keyboard Assembly Removal......................... 15 gure 11. Keyboard and Track Stick Cables and Connectors ......... 16 gure 12. Microprocessor Module Removal...................... 18 gure 13. Display Assembly .................................. 20 gure 14. 14.1-Inch Display Assembly Bezel ..................... 21 gure 15. Display Assembly Bezel (bottom view).................. 23 gure 16. 12.1-Inch DisplayAssembly .......................... 25 gure 17. הסח|-12-1‎ 6 iElex: Cable .. : paan REL NS GA opua Ee 27 gure 18. 12.1-Inch LCD Inverter ...../ ee 28 gure 19. Removing the Palmrest Assembly Screws............... 30

Tables

Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25.

Table 1.

Table 2.

Palmrest Assembly Removal ......................... 31 ModemAssembly.................................. 33 System Board Assembly............................. 35 Thermal Cooling Assembly Removal.................... 36 Module Latch Assemblies Removal .................... 37 Left Module Latch and Spring......................... 38

Screw Placement Mat With Component Screw Counts ANG SIZES AA IA KAHE WAA WA 4

PartsandAssemblies................................ 6

vii

vili

Read This First

A prerequisite for using this manual to service Dell computer systems is a basic knowledge of PCs and prior training in PC troubleshooting techniques. In addition to information provided in this manual, Dell provides the User's Guide for troubleshooting procedures and instructions on using the Dell Diagnostics to test the computer 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.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

CAUTION: A CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

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Dell™ Latitude™ CPt V/CPt S Series and CPx H/CPx J Series Service Manual

This manual provides instructions for removing and replacing field-replaceable components, assemblies, and subassemblies in your Dell Latitude portable computer. Unless otherwise noted, each procedure in this manual assumes that a part can be replaced by performing the removal procedure in reverse order.

It is recommended that you use a book or something similar to Support the display assembly when it is open nearly 180 degrees. 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 manual, the locations or directions relative to the computer are as shown in Figure 1 unless otherwise specified.

back of computer

left side right side

front of computer

Figure 1. Computer Orientation

NOTICE: Do not attempt to service the computer system yourself, except as explained in this manual and elsewhere in Dell documen- tation. Always follow installation and service instructions closely.

Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual 1

Recommended Tools The procedures in this manual require the following tools:

e Number 1 magnetized Phillips-head screwdriver e Small flat-blade screwdriver e Small plastic scribe

e Microprocessor extractor

Preparing to Work Inside Your Computer

NOTICE: Failure to perform the following steps could result in dam- age to the computer.

NOTICE: If working inside your computer involves the removal of the palmrest, note this information about the reserve battery. The reserve battery provides power to the computer’s real-time clock (RTC) and nonvolatile random-access memory (NVRAM) when the computer is turned off. Removing the palmrest disconnects the reserve battery and causes the computer to lose the date and time information as well as all user-specified parameters in NVRAM. If possible, make a copy of this information before you disconnect the reserve battery.

NOTICE: Make sure that the work surface is clean to prevent scratch-

ing the computer cover.

Before Working Inside Your Computer 1. Save any work in progress and close all open application programs.

2. Turn off the computer and any attached peripherals.

NOTE: Make sure the computer is turned off and not in suspend-to-disk or Z hibernate mode. If you cannot shut down the computer using the com- puters operating system, press and hold the power button for 4 seconds.

3. If the computer is docked in a C/Dock Family Expansion Station or C/Port Family 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. Disconnect all other external cables from the computer. 6. Remove any installed PC Cards or plastic blanks from the PC Card slot.

7 Remove any installed devices in the modular device bay.

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NOTICE: To avoid damaging the system board, you must remove the main battery and secondary battery (if present) before you service the computer.

8. Remove the main battery from the battery bay.

Slide the battery bay latch toward the right side of the computer. Then slide the battery out of the battery bay (see Figure 2).

battery bay latch battery

Figure 2. Main Battery Removal

9. Remove the secondary battery assembly (if present) from the modular bay.

10. Ground yourself by touching the unpainted metal surface of the I/O panel on the back of the computer.

While you work, periodically touch the I/O panel to dissipate any static electricity that might harm components.

Screw Identification

The illustrations in the following removal procedures provide the correct screw length as part of the screw's label. A graphic for that length screw is also included in the illustration. Examples are shown in Figure 3. Match the actual screw to the graphic in the illustration to check for correct length.

M2.5x20 M2.5x10 M3.0x5 M2.5x4 M2.5x4 M3.0x3 M2.0x3 aa CC [5x | ]₪ qh ]₪ f ])--.-- AA YA 77 7% A A

20 mm 10 mm 5 mm 4mm 4mm 3 mm 3 mm

Figure 3. Screw Identification

NOTICE: When reinstalling a screw, you must use a screw of the cor- rect diameter and length. Otherwise, hardware damage could result. Make sure that the screw is properly aligned with its corresponding

hole, and avoid overtightening.

Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual 3

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:

M3.0 x 5 (1 each)

Keyboard Assembly:

M2.5 x 10 (7 each)

Display Assembly: M2.5 x 4 (3 each)

Display Assembly Bezel:

Rubber Screw Covers (4 each)

Plastic Screw Covers (2 each)

Display Assembly Bezel:

M2.5 x 4 (6 each)

14.1-Inch Display Assembly LCD to Top Cover:

M2.0 x 3 (6 each)

12.1-Inch Display Assembly

LCD to Top Cover:

M3.0 x 5 (4 each)

12.1-Inch Display Assembly Inverter: M3.0 x 3 (3 each)

Palmrest Assembly: M2.5 x 20 (5 each)

System Board Assembly: M2.5 x 4 (2 each) (w/o modem assembly)

M2.5 x 4 (1 each) M2.5 x 10 (1 each) (w/ modem assembly)

Microprocessor Shield Assembly: 3 captive and 2 removable screws M2.0 x 3 (2 each)

M2.5 x 4 (1 each) (may not apply to your system)

Thermal Cooling Assembly and Exhaust Fan: M2.5 x 4 (2 each)

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Disconnecting Interface 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 the cable from them (see Figure 4).

movable part of connector (do not remove)

yA

Figure 4. Disconnecting a Cable from an Interface Connector

NOTICE: The ZIF interface connectors are fragile. To avoid damage, do not apply too much pressure to the movable part of the connector.

Removing a Cable from a ZIF Interface Connector

1.

Insert a small flat-blade screwdriver behind the movable part of the connector.

Push gently sideways on the movable part of the connector until it releases the interface cable.

Grasp the interface cable and pull it out of the connector.

Replacing a Cable into a ZIF Interface Connector

1

Use a small flat-blade screwdriver to open the movable part of the ZIF connector.

Orient the end of the interface cable with the ZIF connector, and insert the end of the cable into the connector.

While holding the cable in place, close the ZIF connector.

To ensure a firm connection, make sure the ZIF connector is completely closed.

Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual 5

Field-Replaceable Parts and Assemblies

Table 2 lists the parts and assemblies available for the computer. Some parts may only be available as part of a service kit or assembly and are provided for reference only. The subsections that follow Table 2 provide instructions for removing and replacing these parts and assemblies.

Table 2. Parts and Assemblies

Part or Assembly Name Order Name Figure

AC Adapter and Power Cords

Customer kit, AC adapter CUS, ADPT, AC, EXT, 20V, 70W, NBK

AC adapter ADPT, AC, EXT, 20V, 70W, 3W, BA Power cable, U.S. CORD, PWR, 110V, 6F AC, 3W/3P US Battery (Main) Customer kit, main battery CUS, BTRY, 14.4V, 8CELL, LITH 2

CUS, BTRY, 9.6V, 8CELL, NiMH (option for CPt S-Series only)

Main battery BTRY, 53WHR, 14.4V, 8CELL, LITH

BTRY, MAIN, 9.6V, 8, NIMH (option for CPt S-Series only)

Diskette Drive Subassembly

Diskette drive CUS, SUBASSY, FD, F3, INT/EXT 7

SuperDisk LS-120 Drive Subassembly

LS-120 drive subassembly CUS, SUBASSY, VAS, LS120,120MB,F3 7

CD-ROM Drive Subassembly

CD-ROM drive CUS, CD, 650M, |, 24X, zzz? 7 CD-RW ROM Drive Subassembly CD-RW ROM drive CUS, CD-RW, 650M, |, zzz* 7 DVD-ROM Drive Subassembly DVD-ROM drive SUBASSY, DVD, MPEGII, TSHBA 7 Hard-Disk Drive Assembly Hard-disk drive, HD, xxxxGB, yyMM, zzz 6 subassembly Hard-disk drive MOD, HD, xxxxGB, 1, F2, yyMM, zzz" CUS, HD xxxxGB, |, yy MM, zzz” Hard-disk drive PWA, INTERCON, HD

interface board

* Substitute the drive capacity for xxxxGB, the drive height for yyMM, and zzz for the manufacturer's name.

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Table 2. Parts and Assemblies (continued)

Part or Assembly Name Order Name Figure Hard-Disk Drive Carrier Assembly Hard-disk drive carrier ASSY, CARR, HD Palmrest Assembly Palmrest assembly ASSY, PLMRST, TPAD 20 Palmrest screws (5) SCR, M2.5X20, PHH, LP ZPS 19 Battery (Reserve) Reserve battery CUS, BTRY, RESERVE Keyboards (Dual Pointing) Euro-language specific KYBD, nn, iiii*, D-PTG, EMEA 10 keyboard Asian-language specific KYBD, nn, iiii*, D-PTG, APCC keyboard English (U.K.) KYBD, 88, UK, D-PTG, EMEA English (U.S.) KYBD, 87 US, D-PTG, US English (International) KYBD, 87, US, INT, D-PTG, EMEA Keyboard screws (7) SCR, M2.5X10, PHH, LP ZPS 9 * Substitute the number of keys for “nn” and the specific language for “iii.” LCD Assembly, 14.1-Inch Display Panel 14. 1-inch LCD display LCD, TFT, 14.1, zzz* 14 LCD Assembly, 12.1-Inch Display Panel 12.1-inch LCD display LCD, TFT, 12.1, zzz* 16 12.1-Inch Display Panel Inverter 12.1-inch LCD display INVRTR, LCD, 12.1, zzz* 16, 18 panel inverter Display Top Cover Assembly 14.1-inch display top cover ASSY, CVR, TOP LCD, TFT, 14.1 14 14.1-inch display bezel ASSY, BZL, LCD, TFT, 14.1 14 12.1-inch display top cover ASSY, CVR, TOP LCD, 12.1 16 12.1-inch display bezel ASSY, BZL, LCD, 12.1 16 Display assembly screws SCR, M2.5x4, PHH, LP ZPS 14.1-inch flex cable ASSY, CBL, FLX, TFT 14 12.1-inch flex cable ASSY, CBL, FLX, W/EXTN, 12.1 16, 17

Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual

Table 2. Parts and Assemblies (continued)

Part or Assembly Name

14.1 display, right hinge

14.1 display, left hinge

12.1 display, right hinge

12.1 display, left hinge

14.1-inch LCD panel screw

12.1-inch LCD panel screw

12.1-inch LCD inverter

LCD hinge screw

LCD bezel screw

Order Name Figure HNG, RT, LCD, 14.1

HNG, LF LCD, 14.1

HNG, RT, LCD, 12.1

HNG, LF LCD, 12.1

SCR, M2X3, PHH, LP ZPS

SCR, M3X5, PHH, LP ZPS

SCR, M3X3, PHH, LP ZPS 16, 18 SCR, M2.5X4, PHH, LP ZPS

SCR, M2.5X4, PHH, LP ZPS

LCD Latch Assembly

Display latch assembly

ASSY, LATCH, SPR, DIS 14, 16

Bottom Case Assembly

Bottom assembly

ASSY, CVR, BTM, BASE, PLSTC, CH-ST 22

Modem Subassembly

Internal Modem (installed)

Modem Cable Kit

Internal Modem

Modem Screw

Internal Modem (not installed)

Modem Screw

Case Plug

MOD, MDM, INT, NBK, CH-ST 21 KIT, CBL, PHONE, 4PRJ11, MOM MDM, INT, NBK, CHRIST

SCR, M2, 5X15, KSH, MS, BCS, W/ WSHR

MOD, NO, MDM, INT, NBK, CH-ST

SCR, M2, 5X4, RND, MS, NPL, W/ WSHR

PLUG, PLSTC, MDM, CH-ST

Memory Modules

Custo modu

Custo modu

Custo modu

Custo modu

Custo modu

mer ki e, 32-MB

mer ki e, 64-MB

mer ki e, 128-MB

mer ki e, 192-MB

mer ki e, 256-MB

t, memory

t, memory

t, memory

t, memory

t, memory

CUS, 32MB, DIMM, SDRAM 8

CUS, 64MB, DIMM, SDRAM

CUS, 128MB, DIMM, SDRAM

CUS, 192MB, DIMM, SDRAM

CUS, 256MB, DIMM, SDRAM

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Table 2. Parts and Assemblies (continued)

Part or Assembly Name Order Name Figure Memory Door Memory door assembly DOOR, MEM, MET, NB System Board Assembly System board assembly, SVCKIT, MB ASSY, PWA, ENGINE 22 service kit Service tag DSK, BIOS, FLDSVC, F3, US installation diskette BIOS flash diskette KIT, BIOS, FLASH, UPG, F3 Diagnostic diskette KIT, DSK, DIAG, F3, WW System board ASSY, PWA, ENGINE assembly Main system PWA, PLN, OM, NB board Exhaust fan and FAN, 25X25X10 cable Thermal cooling SVC, SUBASSY, HTSNK, CPU, HYB assembly Microprocessor Microprocessor, SVC, PRM, PCA 12 Service Kit Microprocessor shield/ SCR, M2X3, PHH, LP ZPS 12 thermal cooling assembly arm screw Thermal cooling assembly SCR, M2.5X4, PHH, LP ZPS 23 System board assembly SCR, M2.5X4, PHH, LP ZPS 22 Microprocessor Shield Microprocessor shield ASSY, SHLD, EMI, PRC, MET 12

Miscellaneous Hardware

Service Kit, latch, LTCH, BTN, Module slider, Button

Foot, Rubber, Black Foot, Rbr, BIk

(4 each)

Foot, Rubber, Strike Foot, Rbr, Strike Zone, Blk Zone, Black

Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual

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Removing and Replacing Field- Replaceable Parts and Assemblies

display assembly

keyboard

palmrest assembly

internal modem

(may not apply to your system)

hard-disk drive

main battery

case plug for modem

bottom case assembly

modular bay device

Figure 5. Exploded View—Computer

The following subsections provide instructions for removing and replacing field-replaceable parts and assemblies.

10 Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual

Hard-Disk Drive Assembly

bottom of computer Z 5-mm screw M3.0x5 [a

K hard-disk drive door

5 mm 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: Make sure that the work surface is clean to prevent scratch- ing the computer cover.

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.

Removing the Hard-Disk Drive Assembly 1. Remove the main battery and secondary battery (if present).

2. Turn the computer over, and remove the 5-mm screw from the center of the hard-disk drive door (see Figure 6).

The drive is on the left side of the computer.

3. Slide the drive door up and pull the drive assembly out of the computer.

Replacing the Hard-Disk Drive Assembly 1. Push the drive assembly into the opening on the left side of the computer.

2. Slide the drive door down until it aligns with the cover.

3. Turn the computer over and replace the 5-mm screw on the drive door.

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Modular Bay Devices (Diskette Drive, CD-ROM Drive, DVD-ROM Drive, CD-RW Drive, SuperDisk LS-120 Drive, Battery, or Travel Module)

latch lock

Figure 7. Modular Bay Device Removal

NOTICE: Make sure that the work surface is clean to prevent scratch- ing the computer cover.

1. Close the display, and turn the computer upside down on a flat work surface.

2. Push the module latch toward the unlock icon. Keep holding the latch open while pulling the device out of the modular bay with the other hand (see Figure 7).

Memory Module Cover

NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer.

NOTICE: Make sure that the work surface is clean to prevent scratch-

ing the computer cover.

Removing the Memory Module Cover 1. Remove the main battery and secondary battery (if present).

2. Close the display, and turn the computer upside down on a flat work surface.

3. Release the memory module cover.

Insert a flat-blade screwdriver under the indentation in the bottom case assembly and lift the cover.

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Memory Modules

inner tabs (2 per socket)

memory module sockets (2)

Figure 8. Memory Module Removal

Removing the Memory Modules

NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer.

1. Remove the main battery and secondary battery (if present). 2. Remove the memory module cover.

NOTICE: To avoid possible damage to the memory module from elec- trostatic discharge (ESD), ground yourself by touching the unpainted metal surface of an I/O connector on the computer's back panel.

3. To release a memory module from its socket, carefully spread apart the inner tabs of the memory module socket just far enough for the memory module to disengage from the socket. The module should pop up slightly (see Figure 8).

4. Lift the memory module out of its socket.

Replacing the Memory Modules 1. If you only have one memory module, install it in the DIMM A socket.

NOTES: 192-MB memory modules are designed for either the socket labeled DIMM A or the socket labeled DIMM B; they are not interchangeable. Be sure that the memory module is inserted with the double-stacked memory chips facing you. A 192-MB memory module inserted with the double-stacked memory chips facing down does not fit properly in the socket.

Memory modules are keyed, or designed to fit into their sockets, in only one direction. The slots on the system board are notched so that the mem- ory module can be firmly seated only one way.

Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual 13

2. Align the memory module's edge connector with the slot in the center of the memory module socket. With the module at a 45-degree angle, press the memory module's edge connector firmly into the memory module socket.

3. Pivot the memory module down until it clicks into place. If you do not hear a click as each end of the memory module snaps into the tabs, remove the memory module and reinstall it.

4. Replace the memory module cover.

Keyboard Assembly

NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer.

NOTICE: Make sure that the work surface is clean to prevent

scratching the computer cover.

Removing the Keyboard Assembly 1. Remove the main battery and secondary battery (if present).

2. Close the display assembly, and turn the computer upside down on a flat work surface.

10-mm screws (7)

Figure 9. Removing the Keyboard Assembly Screws

14 Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual

3. Remove the seven 10-mm screws, labeled with a "circle K,” that secure the keyboard to the computer (see Figure 9).

4. Turn the computer right-side up and open the display.

NOTICE: The keycaps on the keyboard are fragile, easily dislodged, and time-consuming to replace. Be careful when removing and handling the keyboard.

5. Release the keyboard from the palmrest assembly by inserting a small flat-blade screwdriver under the edge of the blank key (see Figure 10), and lift the right edge of the keyboard.

track stick

keyboard

SI a R 2 CAD / scalloped edge 7 6 SI of blank key D

palmrest

Figure 10. Keyboard Assembly Removal

6. Lift the keyboard out of the palmrest. 7 Rotate the keyboard over the left edge of the computer (see Figure 11).

8. Rest the key face of the keyboard on the left side of the computer.

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track stick cable

keyboard cable

Figure 11. Keyboard and Track Stick Cables and Connectors

9. Disconnect the keyboard cable from the connector on the system board. The keyboard cable is the wide, flexible cable.

10. Carefully disconnect the track stick cable from the ZIF connector on the palmrest's flexible printed circuit board.

11. Remove the keyboard assembly.

Replacing the Keyboard Assembly

1. Place the keyboard on the left side of the computer with the keys face down (see Figure 11).

2. Connect the track stick cable to the ZIF connector.

Ensure that the contact side of this cable is face down when you insert the cable into the track stick ZIF interface connector.

3. Connect the keyboard cable to the connector on the system board.

Ensure that the contact side of this cable is face down when you insert the cable into the keyboard ZIF interface connector.

16 Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual

NOTICE: Position the track stick and keyboard cables so they are not twisted when you reconnect them to the system board.

4. Carefully turn the keyboard over and fit the keyboard into place.

Ensure that the track stick and keyboard cables are not twisted as you lower the keyboard into the palmrest.

5. To push the keyboard down, press on the blank key located below the right <Shift> key.

6. Check that the keyboard is correctly installed. The keys should be flush with the left and right surfaces of the palmrest.

7 Carefully turn the computer over and reinstall the seven 10-mm screws.

Start by installing the outermost screws on the left and right sides of the computer and then work inward to the center.

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Microprocessor Module

0 captive screws (3) 3-mm screws (2) . >

microprocessor shield

4-mm screw (1)

shield brace

(may not apply to your system)

white marks on the microprocessor board (2)

microprocessor module

Figure 12. Microprocessor Module Removal

Removing the Microprocessor Module

NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer.

1. Remove the main battery and secondary battery (if present).

2. Remove the keyboard assembly.

NOTICE: To ensure maximum cooling for the microprocessor, do not touch the heat transfer areas on the thermal cooling assembly. The oils in your skin reduce the heat transfer capability of the thermal pads.

3. Remove the two 3-mm screws on the microprocessor shield securing the thermal cooling assembly to the microprocessor module (see Figure 12).

4. Loosen the three captive screws securing the microprocessor shield to the microprocessor module.

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NOTE: The microprocessor shield brace may not be present on your system, if the brace is not present continue with step 6.

5. Remove the 4-mm screw that secures the microprocessor shield brace (see Figure 12).

6. Remove the microprocessor shield.

7 Rotate the arm of the thermal cooling assembly up and away from the

microprocessor module.

NOTICE: When removing the microprocessor module, pull the mod- ule straight up. Do not move the tool from side to side to extract the processor board.

8.

Use a microprocessor extractor tool to remove the microprocessor module.

The tool fits on the left side of the module aligned with white marks on the front and back edge of the processor board (see Figure 12).

Replacing the Microprocessor Module

NOTICE: Proper seating of the microprocessor module requires a considerable amount of force (approximately 35 pounds [16 kilo- grams]) applied above the module connector.

NOTICE: A microprocessor module that is not properly seated can

result in an intermittent connection and subsequent failures.

1

Align the microprocessor connector on the left side of the board and press down firmly on the metal plate that is directly over the connector.

When the microprocessor module is fully seated, all four corners are aligned to the same height. If one or more corners of the module are higher than the others, the module Is not seated correctly.

2. To ensure the microprocessor module is fully seated, apply pressure over the corner without the mounting screw hole. NOTE: If your system uses a microprocessor shield with the brace as shown in Figure 12, the 4-mm screw used in step 6 secures this corner.

3. Rotate the arm of the thermal cooling assembly into place.

4. Replace the microprocessor shield.

5. Replace the two 3-mm screws that secure the thermal cooling assembly arm and shield to the microprocessor module.

6. Replace the 4-mm screw securing the shield brace (if present).

7 Tighten the three captive screws on the corners of the shield to secure the

microprocessor module and shield (see Figure 12).

Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual 19

Display Assembly

display assembly,

hinge cover

LCD flex cable snap tab

bottom case assembly

4-mm screws (3)

snap tab

M2.5x4

[ka H

4mm

Figure 13. Display Assembly

Removing the Display Assembly

NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer.

NOTICE: Do not remove the palmrest before you remove the display. 1. Remove the main battery and secondary battery (if present). 2. Remove the keyboard.

3. Close the display and remove the three 4-mm screws, labeled with a “circle D,” from the back of the computer (see Figure 13).

4. Open the display and disconnect the LCD flex cable from the connector on the system board by pulling the connector straight up.

5. Lift the display assembly from the bottom case assembly. Pry the hinge cover loose at the seam from the snap tabs on the bottom assembly (see Figure 13).

AL NOTE: Always remove and replace the LCD panel as a complete assembly.

20 Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual

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14.1-Inch Display Assembly Bezel and LCD Panel

O rubber screw covers (4) . display assembly bezel 4-mm screws pa Ki / o plastic screw וו‎ covers (2) IN

plastic tabs (6)

hinge cover

LCD flex E~

cable

M2.0x3 M2.5x4

]₪ ]₪ display-assembly top cover 3-mm screws (6) H =

3 mm 4mm

Figure 14. 14.1-Inch Display Assembly Bezel

Removing the 14.1-Inch Display Assembly Bezel

1. Usea scribe to carefully pry the four rubber screw covers out of the four screw holes located at the top of the bezel on the front of the display assembly.

2. Remove the four 4-mm screws located at the top of the bezel on the front of the display assembly (see Figure 14).

Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual 21

4

Use a scribe to carefully pry the two plastic screw covers out of the two screw holes located at the bottom of the bezel on the front of the display assembly.

Remove the two 4-mm screws from the bottom of the bezel.

NOTICE: The bezel tabs are fragile. Handle the bezel carefully to avoid breaking the plastic tabs off.

5.

Separate the bezel from the display-assembly top cover.

The bezel is secured by three plastic tabs on the left and three plastic tabs on the right side of the display-assembly top cover (see Figure 14).

Removing the14.1-Inch LCD Panel

1.

2.

4.

Remove the display assembly bezel.

Remove the three 3-mm screws on the left side of the LCD panel and the three 3-mm screws on the right side of the LCD panel (see Figure 14).

Lift and rotate the top of the LCD panel out of the top cover. Disconnect the ZIF interface connector and the display-assembly interface cable connector.

Lift the LCD panel out of the top cover.

Removing the 14.1-Inch LCD Flex Cable

NOTICE: Make sure that the work surface is clean to prevent scratch- ing the computer cover.

1.

2. 3.

Remove the LCD panel. Turn the display assembly upside down on a flat work surface.

Remove the 4-mm screw securing the metal cable clip to the left hinge of the display-assembly top cover.

Remove the flex cable out from under the plastic strain relief retainer located on the bottom of the display-assembly hinge cover.

Remove the flex-cable retaining clip from the bottom of the hinge cover located at the bottom of the display-assembly hinge cover.

Pry the hinge-cover assembly apart slightly from the display assembly, allowing Just enough space for the flex cable to pass through the opening.

Slide the cable through the opening.

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Replacing the 14.1-Inch LCD Flex Cable

1

Find the manufacturer's name, either Samsung or /BM/Hitachi, on the back of the replacement LCD panel.

If your replacement LCD panel is a Samsung -- Install the display bezel clip (if one is not present) by placing the bezel slot over the hinge tab and pressing gently until it snaps (see Figure 15).

If your replacement LCD panel is an IBM/Hitachi -- Remove the display bezel clip (if present) by gently prying it up with a small-blade screwdriver (see Figure 15).

bezel slot

display assembly bezel

bezel clip

bezel hinge

Figure 15. Display Assembly Bezel (bottom view)

> &

o

Install the new flex cable that accompanied the replacement LCD display.

Pry the hinge-cover assembly apart from the display assembly, allowing just enough space for the flex cable to pass through the opening.

Slide the cable through the opening.

Attach the flex-cable retaining clip to the bottom of the hinge cover located at the bottom of the display-assembly hinge cover.

Slide the flex cable under the plastic strain relief retainer located on the bottom of the display-assembly hinge cover.

Reinstall the 4-mm screw that secures the metal cable clip to the left hinge of the display-assembly top cover.

Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual 23

Replacing the 14.1-Inch LCD Panel

NOTE: Use a magnetic screwdriver to reassemble the LCD panel in the dis- Z play. Secure the right side first.

1. Place the bottom edge of the LCD panel in the bottom of the top cover and elevate the top of the panel with your hand.

2. Carefully connect the LCD flex cable to the connector on the left edge of the LCD panel.

Do not force the LCD flex cable into the connector. If you have trouble, check to make sure the LCD flex cable is aligned correctly and try again.

3. Lay the LCD panel in the top cover.

4. Reinstall the six 3-mm screws securing the LCD panel to the top cover.

24 Dell Latitude CPt V/CPt S Series and CPx H/CPx J Series Service Manual

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12.1-Inch Display Assembly Bezel and LCD Panel

Se

rubber screw covers (4) \ display assembly bezel

4-mm screws (6) O

plastic screw covers (2)

>

back-light

plug Fa l latch

inverter

sD Lae oO” connector

3-mm screws (3)

LCD flex cable

M3.0x3 M2.5x4 M3.0xb

]₪ ]₪ ]₪ H H H

3 mm 4mm 5 mm

display-assembly top cover