Dell Latitude LM Specifications

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System Overview 1-1Chapter 1System OverviewThe Dell® Latitude® LM P-100SD and LM P-133ST are high-performance multimedia portable computers that use t

1-2 Dell Latitude LM Systems Service Manualwarm swapping. However, the CD-ROM must be in the computer before or during boot in order for the drivers t

System Overview 1-3Status Display. Figure 1-3. Status Display PanelThe status display panel is located directly above the keyboard. This panel shows

1-4 Dell Latitude LM Systems Service ManualDiskette-Drive Access IndicatorThis indicator blinks when data is being transferred to or from the internal

System Overview 1-5Battery Charge Gauge There is a battery charge gauge on the main and second-ary battery. When you press the battery test button (la

1-6 Dell Latitude LM Systems Service ManualSystem PowerThe power button controls power to the system. The computer receives power from either the AC a

System Overview 1-7Interrupt AssignmentsTable 1-1. Interrupt AssignmentsIRQ Line Used/AvailableIRQ0 Generated by the system timerIRQ1 Generated by th

1-8 Dell Latitude LM Systems Service ManualTechnical Specifications Table 1-2. Technical Specifications MicroprocessorMicroprocessor type. . . . . .

System Overview 1-9Memory (Continued)Memory access time:tRAC . . . . . . . . . . . . . . . . 70 nstCAC . . . . . . . . . . . . . . . . 20 nsBIOS

Information in this manual is subject to change without notice. 1994–1996 Dell Computer Corporation. All rights reserved.Printed in the United States

1-10 Dell Latitude LM Systems Service ManualVideoVideo type. . . . . . . . . . . . . . . . 64-bit (128-bit hardware accelerated) PCIVideo controller

System Overview 1-11Dual-Scan Display (Continued)Dot pitch . . . . . . . . . . . . . . . . . 0.29 mmPower consumption. . . . . . . . . 3.4 W Control

1-12 Dell Latitude LM Systems Service ManualMain BatteryType . . . . . . . . . . . . . . . . . . . . lithium ionDimensions:Height. . . . . . . . . .

System Overview 1-13AC AdapterInput voltage . . . . . . . . . . . . . . 90 to 264 VAC Input current (maximum) . . . . 1.0 A at 100 VAC, full loadInp

1-14 Dell Latitude LM Systems Service ManualEnvironmental (Computer)Temperature:Operating . . . . . . . . . . . . . 5° to 35°C (41° to 95°F)Storage .

Initial Procedures 2-1Chapter 2Initial ProceduresThis chapter describes initial procedures that can help you diagnose a com-puter problem. These proce

2-2 Dell Latitude LM Systems Service Manualcomponents, as instructed in the following procedure, see Chapter 4, “Remov-ing and Replacing Parts.” To pe

Initial Procedures 2-312. If an external monitor is connected, verify the following: a. The monitor’s interface cable is properly attached to the exte

2-4 Dell Latitude LM Systems Service Manual3. Watch the indicators at the top of the keyboard. Depending on how your computer is configured, after var

Initial Procedures 2-5Eliminating Resource ConflictsDevices within or connected to the computer may require dedicated memory spaces, interrupt levels,

vContentsChapter 1System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1System Features . . . . . . . . . . . . . . . . .

2-6 Dell Latitude LM Systems Service Manual

Beep Codes and Error Messages 3-1Chapter 3Beep Codes and Error MessagesThis chapter describes beep codes and system error messages that can occur duri

3-2 Dell Latitude LM Systems Service Manual Table 3-1. POST Beep Codes Beep Code Error Probable Causes1-2 Memory module not being properly identif

Beep Codes and Error Messages 3-3System Error MessagesThe following table lists (in alphabetical order) system error messages that may appear on the d

3-4 Dell Latitude LM Systems Service ManualKeyboard error Keyboard not respond-ing correctly.Built-in keyboard: Faulty keyboard or key pressed while c

Beep Codes and Error Messages 3-5System CMOS checksum bad—run SetupCMOS has been cor-rupted or modified, pos-sibly by an application program that chan

3-6 Dell Latitude LM Systems Service ManualRunning the Dell Diagnostics The Dell diagnostics contains tests that aid in troubleshooting the com

Removing and Replacing Parts 4-1Chapter 4Removing and Replacing PartsThis chapter provides procedures for removing and replacing components, assemblie

4-2 Dell Latitude LM Systems Service Manual•Small scribe (or Delrin [plastic] screwdriver)•Nut drivers•Chip removal toolScrew Identification and Tight

Removing and Replacing Parts 4-3Precautionary Measures Before performing any of the procedures in this chapter, read the following warning.1. Dete

viChapter 3Beep Codes and Error Messages . . . . . . . . . . . . . . . . . . 3-1POST Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-4 Dell Latitude LM Systems Service Manual5. Remove the hard-disk drive assembly.Turn the computer over and remove screws HD1 and HD2. Turn the com-p

Removing and Replacing Parts 4-5Keep holding the latch with one hand while pulling the device (diskette drive, secondary battery, or CD-ROM) straight

4-6 Dell Latitude LM Systems Service ManualZIF Connectors Some of the computer’s interface connectors are zero insertion force (ZIF) con-nectors. Thes

Removing and Replacing Parts 4-7Exploded Views of Components and Assemblies .Figure 4-9. Exploded View—Computer LCD panel assemblykeyboardbottom asse

4-8 Dell Latitude LM Systems Service ManualFigure 4-10. Exploded View—LCD Assembly front bezelLCD panelpower/suspend indicatorinverter boardinvert

Removing and Replacing Parts 4-9.Figure 4-11. Exploded View—Top Assembly keyboard flex cablekeyboardLCD flex- cable coverpower buttonkeyboard screw

4-10 Dell Latitude LM Systems Service Manual.Figure 4-12. Exploded View—Bottom Assembly main boardpower boardaudio boardcache boardI/O panel doorI/

Removing and Replacing Parts 4-11Factory Repair Parts and AssembliesThis section contains a parts list and procedures for removing and replacing fac-t

4-12 Dell Latitude LM Systems Service ManualBoard Assemblies (Continued)Board assembly, 133-MHz, service kitSVC,SYS,PLN,LMP133STMain board SYS,PLN,3.

Removing and Replacing Parts 4-13Hard-Disk Drive AssembliesHard-disk drive, 540-MB, service kit*CUS,HD,540MB,I,F2,12.5MM,NBKHard-disk drive, subassemb

viiAudio Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42Main Board . . . . . . . . . . . . . .

4-14 Dell Latitude LM Systems Service ManualLCD AssemblyLCD panel, active-matrix color display (TFT), 12.1”LCD,TFT,SVGA,12.1”,LMP,IBMBoard, TFT invert

Removing and Replacing Parts 4-15Miscellaneous Parts (Continued)Cover, flex-cable CVR,HNG,CTR,LMPInsulator, expansion connector INSUL,CON,DCKG,LMPInsu

4-16 Dell Latitude LM Systems Service ManualService Documentation (Continued)Technical sheet, whole unit replacementTSH,WUE,SVC,LMPTechnical sheet, me

Removing and Replacing Parts 4-17Table 4-2. Naming Conventions Name in This Manual Name in Other DocumentsMain board Mother board assemblyProcessor

4-18 Dell Latitude LM Systems Service ManualDeleting the PasswordIf a user forgets the password and does not have it backed up on diskette, the user m

Removing and Replacing Parts 4-19Hard-Disk DriveFigure 4-14. Hard-Disk Drive Disassembly The hard-disk drive resides in a carrier that mounts in the

4-20 Dell Latitude LM Systems Service ManualDiskette DriveFigure 4-15. Diskette Drive AssemblyThe diskette drive resides in a carrier that slides int

Removing and Replacing Parts 4-21CD-ROMFigure 4-16. CD-ROM Assembly The CD-ROM resides in a carrier that slides into the options drive bay on the r

4-22 Dell Latitude LM Systems Service ManualMemory Module.Figure 4-17. Memory Module RemovalTo remove a memory module, follow these steps:1. Turn the

Removing and Replacing Parts 4-23LCD AssemblyThe LCD assembly consists of the display assembly and its related components. The subsections that follow

viiiFigure 4-29. I/R Device Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36Figure 4-30. Power Button Removal . . . . . . .

4-24 Dell Latitude LM Systems Service ManualFront BezelNOTE: This figure shows the STN LCD assembly, which has the same front bezel as the TFT LCD as

Removing and Replacing Parts 4-25LCD PanelThere are two types of LCD panels: the dual-scan color display (STN) and the active-matrix color display (T

4-26 Dell Latitude LM Systems Service ManualInverter Board.Figure 4-21. Inverter Board RemovalTo remove the inverter board, follow these steps:1. Rem

Removing and Replacing Parts 4-27LCD Assembly LatchesFigure 4-22. LCD Assembly Latches Removal To remove the LCD assembly latches, follow these steps

4-28 Dell Latitude LM Systems Service ManualPower/Suspend IndicatorFigure 4-23. Power/Suspend Indicator RemovalTo remove the power/suspend indicator,

Removing and Replacing Parts 4-29Back BezelFigure 4-24. Back Bezel Removal To remove the back bezel, follow these steps:1. Remove the front bezel

4-30 Dell Latitude LM Systems Service ManualKeyboardThis section provides the removal procedure for the keyboard. Also, it includes the removal proced

Removing and Replacing Parts 4-314. Remove heat sink screws S3 and S4.Lift off the heat sink. 5. Disconnect the keyboard cable from the main board

4-32 Dell Latitude LM Systems Service ManualTop AssemblyThe top assembly consists of the plastic palm rest and its related components. The subsections

Removing and Replacing Parts 4-33To remove the top assembly, follow these steps:1. Remove the LCD panel.See “LCD Panel” found earlier in this chapter.

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4-34 Dell Latitude LM Systems Service ManualSpeakersFigure 4-27. Speakers RemovalTo remove the speakers, follow these steps:1. Remove the top assembl

Removing and Replacing Parts 4-35Status Display BoardFigure 4-28. Status Display Board RemovalTo remove the status display board, follow these steps:

4-36 Dell Latitude LM Systems Service ManualI/R DeviceFigure 4-29. I/R Device Removal To remove the infrared (I/R) device, follow these steps:1. R

Removing and Replacing Parts 4-37Power ButtonFigure 4-30. Power Button RemovalTo remove the power button, follow these steps:1. Remove the top assemb

4-38 Dell Latitude LM Systems Service ManualTouch PadFigure 4-31. Touch Pad RemovalTo remove the touch pad, follow these steps:1. Remove the top asse

Removing and Replacing Parts 4-39Bottom AssemblyThis bottom assembly consists of a plastic base, the main board, and the main board components. The su

4-40 Dell Latitude LM Systems Service ManualProcessor BoardFigure 4-33. Processor Board RemovalTo remove the processor board, follow these steps:1. O

Removing and Replacing Parts 4-41Power Supply BoardFigure 4-34. Power Supply Board RemovalTo remove the power supply board, follow these steps:1. Ope

4-42 Dell Latitude LM Systems Service ManualAudio BoardFigure 4-35. Audio Board RemovalTo remove the audio board, follow these steps:1. Open the cove

Removing and Replacing Parts 4-43Main BoardFigure 4-36. Main Board Removal To remove the main board, follow these steps:1. Open the cover.2. Remove

Read This FirstWarnings, Cautions, and NotesThroughout this manual, there may be blocks of text printed in bold type or in italic type. These blocks

4-44 Dell Latitude LM Systems Service Manual6. Turn the computer around, open the I/O panel cover, and remove standoff nuts ST1, ST2, ST3, ST4, ST5,

Removing and Replacing Parts 4-45Cache BoardFigure 4-37. Cache Board RemovalTo remove the cache board, follow these steps:1. Open the cover.2. Remove

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Index 1IndexAAC adapter connector, 1-2AC Power indicator, 1-4audio board removal, 4-42Bback bezelillustrated, 4-29removal, 4-29batterymain, removal, 4

2 Index TemplateEeliminating resource conflicts, 2-5error messages, 3-3, 3-6ESD, 4-3expansion connector, 1-2exploded viewbottom assembly, 4-10computer

Index 3Mmain batterylocation, 4-3removal, 4-3main-battery compartment, 1-2memorymaximum configuration, 1-1system memory, 1-1memory modulecapacities su

4 Index Templatestatus display board removal, 4-35status display panelabout, 1-3location, 1-2subsystemstesting, 3-6suspend mode, 1-6Suspend Mode indic

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