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Dell™ Latitude™ 120L Service Manual
Memory, Optical Drive, and Mini PCI Card
Keyboard
Modem
Coin-Cell Battery
 
Model PP21L
 Notes, Notices, and Cautions
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 potential for property damage, personal injury, or death.
Information in this document is subject to change without notice.
© 2006 Dell Inc. All rights reserved.
Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.
Trademarks used in this text: Dell, the DELL logo, and Latitude are trademarks of Dell Inc.
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 Inc. disclaims any
proprietary interest in trademarks and trade names other than its own.
January 2006 Rev. A00
Processor Thermal-Cooling Assembly
Speakers
Antenna
Fan
Pinout Assignments for I/O Connectors
 

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   Summary of Contents for Dell Latitude 120L

  • Page 1

    Trademarks used in this text: Dell, the DELL logo, and Latitude are trademarks of Dell Inc. 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 Inc. disclaims any proprietary interest in trademarks and trade names other than its own.

  • Page 2

    Back to Contents Page   Antenna Dell™ Latitude™ 120L Service Manual   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.   CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components.

  • Page 3

    Back to Contents Page  ...

  • Page 4: Base Plastics

    Back to Contents Page   Base Plastics Dell™ Latitude™ 120L Service Manual   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.   CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components.

  • Page 5: Before You Begin, Recommended Tools, Turning Off Your Computer, Before Working Inside Your Computer

    Hold a component such as a processor by its edges, not by its pins. NOTICE: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty.

  • Page 6: Computer Orientation, Screw Identification

    NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall connector.   3. Disconnect any telephone, network, and USB cables from the computer.   4. Disconnect your computer and all attached devices from their electrical outlets.  ...

  • Page 7

    Optical Drive: Fan Module: Display Assembly to Computer Base: (1 each) (4 each) (4 each)     Modem to Display Bezel: Display Panel: System Board: (6 each) (8 each) (2 each)     Top of Palm Rest to Base Plastic to Hard Drive Carrier to Computer Base: Palm Rest From Bottom:...

  • Page 8: Removing The Coin-cell Battery

    Back to Contents Page   Coin-Cell Battery Dell™ Latitude™ 120L Service Manual   Removing the Coin-Cell Battery   Replacing the Coin-Cell Battery  Removing the Coin-Cell Battery   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.   CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components.

  • Page 9

    Back to Contents Page  ...

  • Page 10: System Components

    Dell™ Latitude™ 120L Service Manual   CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. NOTICE: Unless otherwise noted, each procedure in this document assumes that a part can be replaced by performing the removal procedure in reverse order.

  • Page 11: Processor Module, Removing The Processor Module, Replacing The Processor Module

    Back to Contents Page   Processor Module Dell™ Latitude™ 120L Service Manual   Removing the Processor Module   Replacing the Processor Module  Removing the Processor Module   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.   CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components.

  • Page 12

      1. Align the pin-1 corner of the processor module so that it points to the triangle on the system board, and insert the processor module into the ZIF socket. When the processor module is correctly seated, all four corners are aligned at the same height. If one or more corners of the module are higher than the others, the module is not seated correctly.

  • Page 13

    Back to Contents Page   Processor Thermal-Cooling Assembly Dell™ Latitude™ 120L Service Manual   Removing the Processor Thermal-Cooling Assembly   Replacing the Processor Thermal-Cooling Assembly  Removing the Processor Thermal-Cooling Assembly   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.

  • Page 14

     Replacing the Processor Thermal-Cooling Assembly NOTICE: Before you install the replacement processor thermal-cooling assembly, remove the mylar that covers the thermal grease on the assembly.   1. Lower the processor thermal-cooling assembly into place on top of the processor, aligning the numbered screws, labeled "1" through "4," with the numbers on the fan assembly, and the arrow on the pull-strap pointing toward the outside edge of the system board.

  • Page 15: Display Assembly, Removing The Display Assembly

    Back to Contents Page   Display Assembly Dell™ Latitude™ 120L Service Manual   Removing the Display Assembly   Removing the Display Bezel   Removing the Display Panel   Replacing the Display Panel  Removing the Display Assembly   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.

  • Page 16: Removing The Display Bezel

    antenna cable display cable     antenna cable display-cable pull-tab     NOTICE: Be careful not to damage the display switch when removing the display.   12. Lift the display assembly out of the computer base.  Removing the Display Bezel  ...

  • Page 17: Removing The Display Panel

    1 screw covers/display bumpers (6) 2 M2.5 x 5-mm screws (6) display bezel 4 top cover          Removing the Display Panel   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.  ...

  • Page 18: Replacing The Display Panel

    display panel top cover M2 x 3-mm screws (8)   6. Press in both sides of the top flex-cable connector, and pull the top flex-cable connector away from the display connector. 1 inverter connector 2 pull-tab on bottom flex-cable connector 3 top flex-cable connector 4 display connector  ...

  • Page 19

     ...

  • Page 20: Removing The Cooling Fan

    Back to Contents Page   Fan Dell™ Latitude™ 120L Service Manual   Removing the Cooling Fan   Replacing the Cooling Fan  Removing the Cooling Fan   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.   CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components.

  • Page 21: Replacing The Cooling Fan

    fan assembly metal plate M2.5 x 5-mm screws (4)   17. Remove the plate and lift the system board off the fan assembly.  Replacing the Cooling Fan   1. Position the system board over the fan assembly, aligning the screw holes in the system board with those in the fan assembly.  ...

  • Page 22: Flashing The Bios, Flashing The Bios From A Cd

    1. Ensure that the AC adapter is plugged in, the main battery is properly installed, and a network cable is attached.   2. Turn on the computer.   3. Locate the latest BIOS update file for your computer at support.dell.com.   4. Click Download Now to download the file.  ...

  • Page 23: Hard Drive, Removing The Hard Drive

    Dell does not guarantee compatibility or provide support for hard drives from sources other than Dell. NOTE: If you are installing a hard drive from a source other than Dell, you need to install an operating system, drivers, and utilities on the new hard drive. To replace the hard drive in the hard drive bay:  ...

  • Page 24: Replacing The Hard Drive, Returning A Hard Drive To Dell

    User's Guide for your computer.   Returning a Hard Drive to Dell Return your old hard drive to Dell in its original or comparable foam packaging. Otherwise, the hard drive may be damaged in transit. foam packaging hard drive  ...

  • Page 25: Hinge Cover, Removing The Hinge Cover, Replacing The Hinge Cover

    Back to Contents Page   Hinge Cover Dell™ Latitude™ 120L Service Manual   Removing the Hinge Cover   Replacing the Hinge Cover   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.   CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components.

  • Page 26: Removing The Keyboard, Replacing The Keyboard

      Replacing the Keyboard  Removing the Keyboard   CAUTION: Before working inside your Dell™ computer, follow the safety instructions in your Product Information Guide.   CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface.

  • Page 27

    Back to Contents Page  ...

  • Page 28: Removing The Modem, Replacing The Modem

    Back to Contents Page   Modem Dell™ Latitude™ 120L Service Manual   Removing the Modem   Replacing the Modem  Removing the Modem   CAUTION: Before you begin the following procedure, see the safety instructions in the Product Information Guide. NOTICE: To prevent damage to the system board, remove the main battery before working inside the computer. See Before Working Inside Your Computer.

  • Page 29

    1. Connect the modem cable to the modem. NOTICE: Ensure that the modem cable is routed correctly when you replace the modem.   2. Connect the modem to the system board. Align the connector on the bottom of the modem with the modem connector on the system board, and press down on the connector side of the modem.  ...

  • Page 30: Palm Rest

    Back to Contents Page   Palm Rest Dell™ Latitude™ 120L Service Manual   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.   CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components.

  • Page 31

    1 suspend switch 2 touch-pad ribbon-cable release 3 touch-pad ribbon connector tabs (2) cable   10. Disconnect the suspend switch connector from the system board. NOTICE: Carefully separate the palm rest from the base plastics to prevent damage to the palm rest.  ...

  • Page 32: Usb Connector, Video Connector

    Back to Contents Page   Pinout Assignments for I/O Connectors Dell™ Latitude™ 120L Service Manual   USB Connector   Video Connector  USB Connector     Signal USB5V+ USBP– USBP+  Video Connector         Signal Signal CRT_R 9 CRT_G 10 CRT_B 11 MONITOR_DETECT– DDC_DATA CRT_HS...

  • Page 33: Removing The Speakers, Replacing The Speakers

    Back to Contents Page   Speakers Dell™ Latitude™ 120L Service Manual   Removing the Speakers   Replacing the Speakers  Removing the Speakers   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.   CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components.

  • Page 34

    NOTICE: Ensure that the speaker cables are under or between their routing clips. NOTE: The speakers face out in the base plastics holders. NOTE: The right speaker cable is longer than the left speaker cable.   2. Route the speaker cables under or between their routing clips.  ...

  • Page 35: System Board, Removing The System Board

    Back to Contents Page   System Board Dell™ Latitude™ 120L Service Manual   Removing the System Board   Replacing the System Board  Removing the System Board   CAUTION: Before performing the following procedures, follow the safety instructions in the Product Information Guide.   CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components.

  • Page 36: Replacing The System Board

        M2.5 x 5-mm screws (5)      Replacing the System Board   1. Insert the video connector on the replacement system board through the side of the base plastics.   2. Replace the five M2.5 x 5-mm screws that secure the system board to the base plastics.  ...

  • Page 37

    Trademarks used in this text: Dell, the DELL logo, and Latitude are trademarks of Dell Inc. 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 Inc. disclaims any proprietary interest in trademarks and trade names other than its own.

  • Page 38: Removing A Memory Module

    To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface. NOTE: Memory modules purchased from Dell are covered under your computer warranty.   1. Follow the instructions in Before Working Inside Your Computer.

  • Page 39: Replacing The Memory Module, Optical Drive, Removing The Optical Drive

    Removing the Optical Drive   CAUTION: Before working inside your Dell™ computer, follow the safety instructions in the Product Information Guide. NOTICE: To prevent damage to devices, store them in a safe, dry place when they are not installed in the computer. Avoid pressing down on them or placing heavy objects on top of them.

  • Page 40: Replacing The Optical Drive, Mini Pci Card, Removing The Mini Pci Card

      1. Close your display and turn the computer upside-down.   2. If a device security screw is present, use a Phillips screwdriver to remove the M2.5 x 8-mm screw.   3. Using a screwdriver or a plastic scribe, push the notch by the device security screw hole toward the outside of the computer.  ...

  • Page 41

        captive screws (3)       3. If a Mini PCI card is not already installed, go to step 1. If you are replacing a Mini PCI card, remove the existing card: a.  Disconnect the antenna cable from the Mini PCI card.  ...

  • Page 42: Replacing The Mini Pci Card

    Replacing the Mini PCI Card   1. Install the replacement Mini PCI card. NOTICE: To prevent damage to the Mini PCI card, ensure that the antenna cable is not under the card when you press the card into place. a.  Align the Mini PCI card with the connector at a 45-degree angle, and press the Mini PCI card into the connector until it clicks. Mini PCI card metal securing tabs (2)  ...

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