Dell Latitude C840 Manuel de service Page 1

Dell™Latitude™C840ServiceManual Before You Begin Preparing to Work Inside the Computer Recommended Tools Computer Orientation Screw Identificat

Back to Contents Page Display Dell™Latitude™C840ServiceManual Display Overview Hinge Cover Display Assembly Display Bezel Display Pane

1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Use a nonmarring plastic scribe to loosen the hinge cover a

2. Remove the M2.5 x 6-mm flex-cable strain relief screw, and then use the pull loop to remove the display flex cable from the graphics card. 3.

Display Bezel 1. Use a scribe to pry out the four rubber screw covers located across the top of the bezel. 2. Remove the four M2.5 x 4-mm screws l

Replacing the Display Panel 1. Connect the flex cable to the two connectors on the back of the display panel. 2. Place the display panel in the t

Back to Contents Page Fan Dell™Latitude™C840ServiceManual  Removing the Fan 1. Follow the instructions in "Preparing to Work Inside t

Back to Contents Page Hard Drive and Fixed Optical Drive Dell™Latitude™C840ServiceManual Hard Drive Fixed Optical Drive Hard Drive  Rem

Removing the Fixed Optical Drive 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Loosen the captive screw

Back to Contents Page Keyboard Dell™Latitude™C840ServiceManual  Removing the Keyboard 1. Follow the instructions in "Preparing to Wo

5. Lift the right end of the keyboard and slide it slightly toward the right side of the computer to disengage the tabs at the left end. 6. Piv

Back to Contents Page Battery Charger Board Dell™Latitude™C840ServiceManual  Removing the Battery Charger Board 1. Follow the instructions

2. Insert the metal tabs at the left end of the keyboard under the edge of the bottom case, and fit the keyboard into place. 3. Check that the key

Back to Contents Page LED Board Dell™Latitude™C840ServiceManual  Removing the LED Board 1. Follow the instructions in "Preparing to W

Back to Contents Page Palm Rest Dell™Latitude™C840ServiceManual  Removing the Palm Rest 1. Follow the instructions in "Preparing to

8. Turn the computer over. 9. Use the pull loop to disconnect the palm-rest flex cable from the touch-pad connector on the system board. 10.

Back to Contents Page Pin Assignments for I/O Connectors Dell™Latitude™C840ServiceManual USB Connector  Serial Connector  Parallel Conn

Video Connector  PS/2 Connector  S-Video TV-Out Connector 2 PD0 12 PE 3 PD1 13 SLCT 4 PD2 14 AFDF# 5 PD3 15 ERROR# 6 PD4 16 INIT# 7 PD5F 17

 Docking Connector  S-Video Pin Signal 1 GND 2 GND 3 DLUMA-L 4 DCRMA-L Composite Video Pin Signal 5 SPDIF 6 DCMPS-L 7 SPGND Pin Signal Pin Sig

21 GND 121 GND 22 NC 122 SDEVSEL# 23 NC 123 STRDY# 24 D_ATCTLED 124 SIRDY# 25 D_PWRLED 125 SFRAME# 26 DOCK_PWR_SRC 126 SCLKRUN# 27 DOCK_PWR_SRC 127 GN

IEEE 1394 Connector  Back to Contents Page    80 DCLK_SMB 180 SAD20 81 SMB_INIT# 181 SAD21 82 GND 182 GND 83 DAT_DOCKSM1 183 SAD22 84 CLK_DOCKS

Back to Contents Page Reserve Battery Dell™Latitude™C840ServiceManual  Removing the Reserve Battery 1. Follow the instructions in "Pr

Back to Contents Page Battery and Module Bay Latches Dell™Latitude™C840ServiceManual  Removing and Replacing the Battery and Module Bay Latc

7. Remove the four M2.5 x 4-mm screws that secure the palm rest bracket. 8. While supporting the palm-rest flex cable, lift out the palm rest brac

Back to Contents Page RJ-11/RJ-45 Module Dell™Latitude™C840ServiceManual  Removing the RJ-11/RJ-45 Module 1. Follow the instructions in &q

When replacing the system board, ensure that the network cable is safely above the board and out of the way. Back to Contents Page    1 vertical sl

Back to Contents Page System Board Dell™Latitude™C840ServiceManual  The BIOS chip on the system board contains the service tag sequence, whi

13. Separate the network cable from the system board: a. First remove the network cable cover: Insert a narrow plastic scribe or small screwdriver

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Back to Contents Page System Components Dell™Latitude™C840ServiceManual  Back to Contents Page    NOTICE: Unless otherwise noted, each pr

Back to Contents Page Microprocessor Thermal-Cooling Assembly Dell™Latitude™C840ServiceManual  Removing the Microprocessor Thermal-Cooling

5. Lift out the thermal-cooling assembly. Back to Contents Page    1 microprocessor thermal-cooling assembly NOTICE: To ensure maximum cooling f

Back to Contents Page Dell™Latitude™C840ServiceManual Notes, Notices, and Cautions Notes, Notices, and Cautions Back to Contents Page    NO

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Back to Contents Page System Upgrades Dell™Latitude™C840ServiceManual Memory Modules Modem Daughter Card Mini PCI Card Memory Modules Rem

Removing the Memory Modules 1. Remove the memory module/modem cover. 2. To release a memory module from its socket, spread apart the tabs at e

3. Remove the M2 x 3-mm screw that secures the modem daughter card to the system board. 4. Use the pull tab to pull the modem daughter card str

Removing the Mini PCI Card 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the M2.5 x 20-mm screw and

Back to Contents Page Video Graphics Board Dell™Latitude™C840ServiceManual  Removing the Video Graphics Board 1. Follow the instructions i

Back to Contents Page Before You Begin Dell™Latitude™C840ServiceManual Preparing to Work Inside the Computer Recommended Tools Computer Or

Screw Identification When you are removing and replacing components, photocopy the placemat as a tool to lay out and keep track of the component scr

Back to Contents Page    Palm Rest Bracket: M2.5 x 4 mm (4 each) M2.5 x 20 mm (1 each) Fan: M2 x 4 mm (3 each) Memory Module/Modem Cover: M2.

Back to Contents Page Microprocessor Module Dell™Latitude™C840ServiceManual  Removing the Microprocessor Module 1. Follow the instructions

b. Use the microprocessor extraction tool to remove the microprocessor module. Replacing the Microprocessor Module 1. Align the pin-1 triangle o