____________________ Information in this document is subject to change without notice. © 1999 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.
Recommended Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Preparing to Work Inside Your Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Screw Identification and Tightening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ZIF Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Field-Replaceable Parts and Assemblies . . . . . . . . . . . . . . . . . . . . . .
Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Computer Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Main Battery Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . 3 Screw Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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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. Throughout this guide, blocks of text may be accompanied by an icon and printed in bold type or in italic type.
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 the following conditions: 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.
Most of the procedures in this manual require the use of one or more of the following tools: Number 1 magnetized Phillips-head screwdriver Small flat-blade screwdriver Small plastic scribe Processor extractor Before you start to work on the computer, perform the following steps.
" 8. Remove the main battery assembly 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 9. Ground yourself by touching the unpainted metal surface of the I/O panel on the back of the computer.
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. # $ % & ! ' Keyboard Assembly: Hard-Disk Drive: M3 x 5 (1 each) Display Assembly Bezel: Rubber Screw Covers (4 each) Plastic Screw Covers (2 each) M2.5 x 10 (7 each) Display Assembly Bezel: M2.5 x 4 (6 each) 12.1-Inch Display Assembly LCD to Top Cover: M3 x 5 (4 each) 12.
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). movable part of connector (do not remove) ( ) " . $ " To disconnect an interface cable from a ZIF connector, perform the following steps: 1.
! " # " 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.
# $ ! " ! Diskette drive service kit SVC, SUBASSY, FD, F3, INT/EXT, CRNA Diskette drive subassembly SUBASSY, FD, F3, INT/EXT, CRNA Diskette drive FD, F3, CRNA Diskette drive assembly bottom cover CVR, BTM, PLSTC, FD, F3, CRNA Diskette drive assembly top cover CVR, TOP, PLSTC, FD, F3, CRNA Diskette drive assembly interface board PWA, INTFC, FD, F3, CRNA Diskette drive assembly interface cable CBL, FPC, FD, F3,
# $ ! * " Hard-disk drive carrier assembly ASSY, CARR, HD, CRNA Hard-disk drive carrier door DOOR, HD, 12.7MM, CRNA Hard-disk drive carrier bracket CARRIER, HD, 12.
# $ ! ( Display top-cover service kit, 14.1-inch display ASSY, CVR, TOP, LCD, CRNA 14.1-inch display top cover CVR, TOP, LCD, TFT, CRNA 12.1-inch display top cover ASSY, CVR, TOP, LCD, 12.1, CRNA 15 14.1-inch flex cable ASSY, CBL, FLX, TFT 14 12.1-inch flex cable ASSY, CBL, FLX, 12.1 15, 16 12.1-inch display bezel ASSY, BZL, LCD, 12.
# $ ! Service kit, memory door assembly Memory/BIOS door subassembly SVC, SUBASSY, DOOR, MEM/ BIOS, CRNA SUBASSY, DOOR, MEM/BIOS, NB, CRNA Service kit, palmrest assembly ASSY, PLMRST, CRNA Palmrest assembly ASSY, PLMRST, GRY, CRNA Subassembly, touch pad, brace SUBASSY, TPAD, BRACE Touch pad TPAD, SGL, CHIP, INTEFC Cable, flex, touch pad CBL, FLX, TPAD Palmrest, plastic PLMRST, PLSTC Speaker (2 each)
# $ ! ! System board assembly, CRNA, service kit SVCKIT, MB ASSY, PWA, ENGINE, CRNA Service tag installation diskette DSK, BIOS, FLDSVC, F3, US BIOS flash diskette KIT, BIOS, FLASH, UPG, F3 Diagnostic diskette KIT, DSK, DIAG, F3, CRNA, WW System board assembly ASSY, PWA, ENGINE, CRNA Main system board PWA, PLN, 0M, NB, CRNA Exhaust fan and cable FAN, 25X25X10, CRNA Thermal cooling assembly SVC, SUBASSY, HTSNK,
$ ! " # " display assembly keyboard palmrest assembly hard-disk drive system board main battery bottom case assembly modular bay device * +, ! ! - . The following subsections provide instructions for removing and replacing field-replaceable parts and assemblies.
bottom of computer 5-mm screw M3.0x5 hard-disk drive door / 0 !1) 2 ) " % & & / ( 0 ! % *" & , & & % 1.
, & & % 1. Close the display and turn the computer over. 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).
2. 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 (it should pop up slightly) (see Figure 8). 3. Lift the memory module out of its socket. If you only have one memory module, install it in the DIMM A socket. Memory modules are keyed, or designed to fit into their sockets, in only one direction.
10-mm screws (7) M2.5x10 5 & 6 ! 2. Remove the seven 10-mm screws, labeled with a “circle K,” that secure the keyboard to the computer (see Figure 9). 3. Turn the computer right-side up and open the display. & & " " % 4 & 4.
track stick keyboard scalloped edge of blank key palmrest 7 6 ! 5. Lift the keyboard out of the palmrest. 6. Rotate the keyboard over its left edge. 7. support.dell.com Rest the key face of the keyboard on the left side of the computer (see Figure 11).
track stick cable keyboard cable 6 ! ! # 2 2 8. Disconnect the keyboard cable from the connector on the system board. The keyboard cable is the wide, flexible cable. 9. Carefully disconnect the track stick cable from the ZIF connector on the palmrest’s flexible printed circuit (FPC). 10. Remove the keyboard assembly. To replace the keyboard assembly, perform the following steps.
5. To push the keyboard down, press on the blank key located below the right key. 6. Check that the keyboard is correctly installed. The keys should be flush with the left and right surfaces of the palmrest. 7. 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. captive screws (3) 3-mm screws (2) microprocessor shield M2.
1. Remove the main battery. 2. Remove the keyboard assembly. 6 " ( * & 3. Remove the two 3-mm screws on the microprocessor shield that secure the thermal cooling assembly to the microprocessor module (see Figure 12). 4.
display assembly hinge cover LCD flex cable snap tab bottom case assembly 4-mm screws (3) snap tab M2.5x4 ) " " % " ( * 2 1. Remove the keyboard. 2. Close the display. 3.
6. 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). ' rubber screw covers (4) display assembly bezel 4-mm screws (6) plastic screw covers (2) LCD panel latch hinge cover LCD flex cable M2.0x3 M2.
" 1. Use a 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). 3.
+. , !()! *+ , / 0 1. Remove the 4-mm screw securing the metal cable clip to the left hinge of the display-assembly top cover (see Figure 14). 2. Remove the cable out from under the plastic strain relief retainer located on the bottom of the display-assembly hinge cover. 3. Remove the clip from the bottom of the hinge cover located at the bottom of the display assembly. 4.
!")! *+ , - + rubber screw covers (4) display assembly bezel 4-mm screws (6) plastic screw covers (2) 5-mm screws (4) LCD panel back-light plug latch inverter LCD flex cable ZIF connector 3-mm screws (3) M3.0x3 M2.5x4 M3.0x5 display-assembly top cover * 1 & ) To remove the 12.1-inch display LCD panel, perform the following steps: 1. Remove the main battery. 2. Remove the keyboard. 3. Remove the display assembly. 4. Remove the display assembly bezel. 5.
6. Disconnect the two-wire back-light plug from the connector on the inverter. 7. Lift the LCD panel and carefully disconnect the flex cable from the connector on the left edge of the LCD panel. 8. Remove the LCD panel from the top cover. 1. Disconnect the LCD flex cable from the ZIF connector on the inverter. 2. Remove the three 3-mm screws securing the inverter to the top cover. 3. Remove the inverter from the top cover. 1.
7. Fold the LCD flex cable at the crease shown in Figure 16, so the name of the LCD panel manufacturer faces up. The connectors on the Torisan and Sharp LCD panels are mounted in the reverse of each other. This means that pin 1 on the Torisan panel connector is at the opposite end when compared to pin 1 on the Sharp panel connector. Both panels have the same connector, but the connector is mounted differently. The LCD flex cable can connect to either panel by making one fold to the cable.
back-light connector ZIF connector jumpers label inverter 3 1 & 8 ) 3. Place the inverter in the cover top. 4. Reinstall the three 3-mm screws that secure the inverter to the top cover. 5. Connect the LCD flex cable to the ZIF connector on the inverter. +. , !")! *+ , - + 1. Find the manufacturer’s name on the back of the LCD panel that is to be installed. The manufacturer is either Torisan or Sharp. 2.
Do not force the LCD flex cable into the connector. If you have trouble, check to make sure the LCD flex cable is folded correctly and try again. 6. Lay the LCD panel in the top cover. 7. Connect the two-wire back-light plug to the connector on the inverter. When the plug is all the way in the connector, the key slot in the center of the plug should not be visible. If you can see the key slot, the plug is not in the connector correctly.
20-mm screws (5) M2.5x20 4 & $ " 1. Remove the main battery. 2. Remove the device from the modular bay. 3. Remove the keyboard. 4. Remove the display assembly. , & & % 5.
8. Disconnect the palmrest flexible cable from the touch-pad connector on the system board (see Figure 19). palmrest flexible cable palmrest assembly touch-pad connector bottom case assembly 5 $ 9. Carefully remove the palmrest assembly from the bottom case assembly (see Figure 19).
6. Turn the palmrest assembly over. 7. Remove the two 4-mm screws securing the palmrest bracket. 8. Lift the palmrest bracket and turn it over, taking care not to twist the touchpad cable. 9. Disconnect the reserve battery cable from the connector on the palmrest bracket. 10. Remove the reserve battery from the palmrest bracket as follows: a. Tear the reserve battery free from the foam pad. b. Remove the remnants of the foam pad from the palmrest bracket.
" 1. Remove the main battery. 2. Remove the device from the modular bay. 3. Remove the keyboard assembly. 4. Remove the display assembly. 5. Remove the palmrest assembly. 6. Remove the left module latch button from the outside of the bottom case assembly by carefully squeezing the snap tabs to unsnap the module latch.
diskette that provides a utility for transferring the service tag number to the replacement system board assembly. " 1. Remove the main battery. 2. Remove the device from the modular bay. 3. Remove the keyboard assembly. 4. Remove the display assembly. 5. Remove the palmrest assembly. 6. Remove the microprocessor module. 7. Remove any PC Cards or plastic blanks from the PC Card slot. 8.
system board assembly 4-mm screws with captive washers (2) M2.5x4 bottom case assembly ! 10. Lift the system board assembly out of the bottom case assembly. Be sure to transfer the memory module(s) to 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.
$, +. 4-mm screws (2) M2.5x4 thermal cooling assembly and exhaust fan #& " 1. Remove the main battery. 2. Remove the device from the modular bay. 3. Remove the keyboard assembly. 4. Remove the display assembly. 5. Remove the palmrest assembly. 6. Remove the microprocessor module. 7. Remove the system board assembly. 8.
12.1-inch LCD display panel removal, 25 replacement, 28 12.1-inch LCD flex cable removal, 26 replacement, 26 12.1-inch LCD panel inverter removal, 26 replacement, 27 14.1-inch LCD display panel removal, 23 14.1-inch LCD flex cable removal, 24 % battery (in modular bay) removal, 13 battery (reserve) removal, 31 & diskette drive removal, 13 display assembly bezel, removal, 22 removal, 21 display assembly latch removal, 29 display panel, 12.
( hard-disk drive assembly removal, 13 palmrest assembly removal, 29 inverter, 12.
