Dell Latitude LM Service Manual.pdf part of dell Dell Latitude LM Dell Latitude LM Service Manual.rar, Dell Latitude LM service manual text manual preview

Text preview for : Dell Latitude LM Service Manual.pdf part of dell Dell Latitude LM Dell Latitude LM service manual

Back to : Dell Latitude LM Service | Home

Dell ®Latitude ® LM

Service Manual Update T

his document updates information contained in the Dell Latitude LM Service Manual.

New System Features
Additional system features include:

· Now available with a 166-MHz Intel® Pentium® microprocessor with · Support for a maximum of 72 MB of system memory by installing a

MMXTM technology in the Dell Latitude LM M166ST, which has the same features as other models of the computer. matched pair of 32-MB memory modules in the memory upgrade sockets on the main board. (The standard minimum configuration is now 8 MB of nonremovable memory on the main board and two 4-MB memory modules in the memory upgrade sockets.)

· The Pentium microprocessor with MMX technology has twice the internal
cache memory (32 KB) as the standard Pentium microprocessor.

· A NeoMagic 2093 video controller for a video subsystem that includes
1.1 MB of video memory.

· 6X or 10X CD-ROM drives. · Your computer may not appear exactly as shown in some of the figures in
the Service Manual. Conductive sponges or EMI shields may have been added.

Dell Latitude LM Service Manual Update

1

Technical Specifications
The following information updates Table A-1, "Technical Specifications," in Appendix A.

Technical Specifications
Microprocessor

Microprocessor type/speed. . . Pentium microprocessor with MMX technology/166 MHz or Pentium microprocessor/ 133 MHz Internal cache . . . . . . . . . . . . . 32 KB (Pentium microprocessor with MMX technology) or 16 KB (133-MHz Pentium microprocessor) External cache . . . . . . . . . . . . 256-KB write-back SRAM Math coprocessor . . . . . . . . . . internal to the microprocessor
Memory

Architecture . . . . . . . . . . . . . . fast-page mode, two-way interleaved Memory module capacities . . . . . . . . . . . . . . . . 4, 8, 16, and 32 MB; memory modules must be installed in matched pairs (two 4-MB modules, two 8-MB modules, two 16-MB modules, or two 32-MB modules) Standard RAM . . . . . . . . . . . . 16 MB (8 MB of nonremovable memory on the system board and two installed 4-MB memory modules) Maximum RAM . . . . . . . . . . . 72 MB Memory access time: tRAC . . . . . . . . . . . . . . . . 70 ns tCAC . . . . . . . . . . . . . . . . 20 ns BIOS address . . . . . . . . . . . . . F000:0000

2

Dell Latitude LM Service Manual Update

Technical Specifications (continued)
Video

Video type . . . . . . . . . . . . . . . . 64-bit (128-bit hardware accelerated) PCI Video controller . . . . . . . . . . . NeoMagic 2093 (systems with MMX technology) or NeoMagic 2070 Video memory. . . . . . . . . . . . . 1.1 MB (systems with MMX technology) or 896 KB
Battery

Type. . . . . . . . . . . . . . . . . . . . . lithium ion Dimensions: Height . . . . . . . . . . . . . . . . 22.0 mm (0.86 inch) Depth. . . . . . . . . . . . . . . . . 219.0 mm (8.62 inches) Width. . . . . . . . . . . . . . . . . 57.8 mm (2.27 inches) Weight . . . . . . . . . . . . . . . . . . . 0.44 kg (0.97 lb) Voltage . . . . . . . . . . . . . . . . . . 10.8 VDC Capacity . . . . . . . . . . . . . . . . . 42 WH Charge time (approximate):* Computer on . . . . . . . . . . . 4 hours Computer off. . . . . . . . . . . 3 hours Operating time (approximate, with no power management features enabled)* . . . . . . . . . . 3 to 5 hours with one battery; 6 to 10 hours with two batteries Life span (approximate)*. . . . . 500 discharge/charge cycles Temperature range: Charge and discharge . . . . 5° to 35°C (41° to 95°F) Storage . . . . . . . . . . . . . . . -20° to 50°C (-4° to 122°F)
CD-ROM Drive

Form factor . . . . . . . . . . . . . . . 5.25 inches Interface . . . . . . . . . . . . . . . . . IDE Memory. . . . . . . . . . . . . . . . . . 128,000 bytes (data buffer memory)
* Battery performance features such as charge time, operating time, and life span can vary according to the conditions under which the computer and battery are used.

Dell Latitude LM Service Manual Update

3

Technical Specifications (continued)
CD-ROM Drive (continued)

Voltage . . . . . . . . . . . . . . . . . . 5 V (single-voltage drive) Access time. . . . . . . . . . . . . . . 250 m/sec Data transfer rate: Sequential . . . . . . . . . . . . . 150 KB/sec 900 KB/sec (6X) 1500 KB/sec (10X) From buffer. . . . . . . . . . . . 14.4 MB/sec Physical: Height . . . . . . . . . . . . . . . . 17.0 mm (0.67 inch) Width . . . . . . . . . . . . . . . . 130.6 mm (5.14 inches) Depth . . . . . . . . . . . . . . . . 140.6 mm (5.56 inches) Weight (no CD in tray) . . . 0.35 kg (0.77 lb)

Additional Parts and Assemblies
Removal and replacement procedures for all parts and assemblies are the same as those described in Chapter 4, "Removing and Replacing Parts." However, some of the parts and assemblies used are different. The following information updates Table 4-1, "Factory Repair Parts and Assemblies," in Chapter 4.

Factory Repair Parts and Assemblies
Part or Assembly Number Order Number Board Assemblies

Board assembly, 166-MHz, service kit Main board Processor board, 166-MHz Card, cache Heat sink, microprocessor, subassembly Screws, heat sink

SVC,SYS,PLN,LMP166ST SYS,PLN,TFT,LMM CRD,PRCR,LMP166 CRD,L2,CACHE,LMP SUBASSY,HTSNK,CPU,LMM SCR,2X,4X4,PHH,MS,ZPS

Spacer/Bumper, rubber, flex cable BMPR,LCD,FPC,25X5X5M,LMP

4

Dell Latitude LM Service Manual Update

Factory Repair Parts and Assemblies (continued)
Part or Assembly Number Order Number Board Assemblies (continued)

Foil, metal EMI Insulator, power supply Board, power supply Insulator, main board

SHLD,EMI,AL,W/CNDCT ADH,LMM INSUL,MYLAR,BD,CONV, DC-DC.LMP CRD,CONV,DC-DC,LMM INSUL,MYLAR,BD,CONV, DC-DC,LMP
Boards and Cards

Cable, flex, audio jack CD-ROM, service kit* CD-ROM drive CD-ROM, service kit* CD-ROM drive Hard-disk drive, 2.1-GB, service kit* Hard-disk drive, 2.1-GB, subassembly Hard-disk drive, 2.1-GB Bracket, hard-disk drive Screws, bracket LCD, IBM, service kit Cable, TFT flex LCD, SA, service kit LCD panel, active-matrix color display (TFT), 12.1"
* Customer-replaceable unit (CRU)

CBL,FLEX,JK,AUD,W/EMI,LM
CD-ROM

CUS,CD ROM,6X,LMP CD ROM,6X,LMP CUS,CD ROM,I,INT,10X,LMP CD ROM,I,INT,10X,LM
Hard-Disk Drive Assemblies

CUS,HD,2.1GB,I,F2,12.5MM SUBASSY,HD,2.1G,F2, 12.5MM,NBK HD,2.1GB,I,F2,12.5MM,IBM BRKT,HD,12.5MM,LMP SCR,M3,0x0,5,PHH,NPL

LCD Assembly

SVC,LCD/FPC/INV,TFT,LMM,IBM CBL,FLEX,LCD,TFT,IBM,W/ EMI,LM SVC,LCD/FPC/INV,TFT,LMM, SMSNG LCD,TFT,SVGA,12.1",LM,SMSNG

Dell Latitude LM Service Manual Update

5

Factory Repair Parts and Assemblies (continued)
Part or Assembly Number Order Number LCD Assembly (continued)

Board, TFT inverter Cable, TFT flex Bezel, TFT back LCD, LG, service kit LCD panel, active-matrix color display (TFT), 12.1" Board, TFT inverter Cable, TFT flex Bezel, TFT back

CRD,INVRTR,TFT,SMSNG,LM CBL,FLEX,LCD,TFT,SMSNG,LM CVR,BK,LCD,TFT,SMSNG,LM SVC,LCD/FPC/INV,TFT,LMM,LG LCD,TFT,SVGA,12.1",LMP,LG CRD,INVRTR,TFT,LMP,LG CBL,FLEX,LCD,TFT,LG, W/EMI,LM CVR,BK,LCD,TFT,LMP,LG
Memory

Memory module, 64-MB SODIMM, service kit* Memory module, two 32-MB Top cover, palmrest Guide rail, hard-disk drive, left Guide rail, hard-disk drive, right Case, base bottom
* Customer-replaceable unit (CRU)

CUS,MEM,64M,LMP DIMM,32MB,70NS,8X32,NBK,G PLMRST,PLSTC,BLK,W/EMI,LM

Miscellaneous Parts

Top Case Assembly

RAIL,HD,LF,W/EMI PLD,LM GDE, RL,RT,HD,LMP CVR,BTM,PLSTC,BLK, W/EMI,LM

6

Dell Latitude LM Service Manual Update

EMI Changes
The following EMI changes may have been made to your computer, and the sections in Chapter 4 should be updated to reflect these changes.

Keyboard
The heat sink in your computer may be slightly different from the one shown in Figure 4-25. There may be a conductive sponge added to your computer.

Top Assembly
If you have a Latitude MMX computer, use the following figure for the removal and replacement procedure. The top assembly has two hard-disk drive contact springs on the underside of the top assembly. There is also a conductive sponge added to the top assembly (see the following figure).
keyboard heat sink

hinge cover (2)

EMI foil SD1 conductive sponge

display close button

top assembly

SD2

kapton tape main board touch pad connector 5 mm (screws SD3 and SD4 are 3 mm) bottom assembly (screws SD1 and SD2 are 5 mm)

SD3

SD4

hook

3 mm

Top Assembly Removal

Dell Latitude LM Service Manual Update

7

When you separate the top assembly from the bottom assembly, peal the kapton tape from the EMI foil. Before replacing the top assembly, replace the old EMI foil with a new EMI foil and replace the old kapton tape with a new piece of kapton tape.

Bottom Assembly
The bottom assembly in your computer may have an I/O EMI shield and conductive sponges in addition to the components shown in Figure 4-32.

Audio Board
The audio cable may be wrapped in EMI cloth.

Checking the Label
After replacing the old display, make sure the computer's display label on the back of the computer reflects the correct display in the computer by following these steps: 1. Open the computer's I/O panel door. 2. Check the label below the service tag (as you look at the back of the computer). If the label has the correct code for the display in the computer, no further action is required. If you replaced the display that was in the computer with a different display (for instance, an IB display was replaced with an LG display), cross out the preprinted code and write the code for the replacement display in the blank space on the label. If the computer does not have a display type label, place the blank label (that came in the service kit) below the service tag and write in the code for the display--for instance, IB, SA, or LG.

Main Board Switch
The following information supplements step 10 of the "Main Board" procedure in Chapter 4:

· If you reinstall the main board with a Revision 5a main board, make sure the
DIP switch, SW2 (see the following figure), is set correctly for the type of display, STN or TFT, in your computer.

· For an STN display, switches 1 and 4 are on and switches 2 and 3 are off. · For a TFT display, switches 1 and 4 are off and switches 2 and 3 are on.

8

Dell Latitude LM Service Manual Update

main board

SW2

Main Board Switches
If you are replacing the main board in a Latitude LM M166ST or in a Latitude LM P133ST with the EMI cloth tape on the audio cable (system board #82224), use the following procedure to adjust the EMI cloth-covered audio cable: 1. Remove the main board from the shipping container. 2. Remove the foam pad by sliding it out from under the audio cable. 3. Install the main board in the computer.

Dell Latitude LM Service Manual Update

9