Dell Latitude C840 Service Manual
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Dell Latitude C840 Service Manual

Dell Latitude C840 Service Manual

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Dell Latitude C840 Service Manual

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  • Page 1 Thank you for purchasing this Factory Service Manual CD/DVD from servicemanuals4u.com. Please check out our eBay auctions for more great deals on Factory Service Manuals: servicemanuals4u...
  • Page 2 Dell Latitude C840 Service Manual Dell™ Latitude™ C840 Service Manual Before You Begin Preparing to Work Inside the Computer Recommended Tools Computer Orientation Screw Identification System Components Hard Drive and Fixed Optical Drive Hard Drive Fixed Optical Drive System Upgrades...
  • Page 3 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; Intel is a registered trademark of Intel Corporation; Microsoft and Windows are registered trademarks of Microsoft Corporation.

  • Page 4: Before You Begin

    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 warrantly. Read and follow all safety instructions in "Safety and EMC Instructions: Portable Computers" in your System Information Guide.

  • Page 5: Recommended Tools

    Before You Begin: Dell Latitude C840 Service Manual 10. Remove the battery from the battery bay. NOTICE: To avoid component damage, always remove any installed batteries before you service the computer. 11. Remove any device installed in the module bay.

  • Page 6: Screw Identification

    Before You Begin: Dell Latitude C840 Service Manual Screw Identification When you are removing and replacing components, photocopy the placemat as a tool to lay out and keep track of the component screws. The placemat provides the number of screws and the sizes.
  • Page 7 Before You Begin: Dell Latitude C840 Service Manual NOTICE: When reinstalling a screw, you must use a screw of the correct diameter and length. Ensure that the screw is properly aligned with its corresponding hole, and avoid overtightening. Hard-Drive Door Security:...

  • Page 8: System Board

    Before You Begin: Dell Latitude C840 Service Manual Palm Rest to System Board: LED Board: Bottom Case: M2.5 x 4 mm captive washer M2 x 4 mm (2 each) M2.5 x 20 mm (9 each) (3 each) Palm Rest Bracket: M2.5 x 20 mm (1 each)

  • Page 9: System Components

    System Components: Dell Latitude C840 Service Manual Back to Contents Page System Components Dell™ Latitude™ C840 Service Manual 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 10: Table Of Contents

    System Components: Dell Latitude C840 Service Manual 1 display assembly main battery 2 hinge cover device in module bay 3 microprocessor thermal-cooling fixed optical drive assembly 4 system board 10 palm rest 5 hard drive 11 keyboard 6 bottom case Back to Contents Page file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...k/Latitude/C840/C840_SERVICE_MANUAL/system.htm (2 of 2)6/21/2004 1:36:10 AM...

  • Page 11: Hard Drive

    Fixed Optical Drive 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. Hard Drive NOTICE: Disconnect the computer and attached devices from the electrical outlet and remove any installed batteries.

  • Page 12: Removing The Hard Drive

    Hard Drive and Fixed Optical Drive: Dell Latitude C840 Service Manual bottom of computer M3 x 5-mm screw hard drive door Removing the Hard Drive 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the M3 x 5-mm screw.

  • Page 13: Fixed Optical Drive

    Hard Drive and Fixed Optical Drive: Dell Latitude C840 Service Manual Fixed Optical Drive NOTICE: Disconnect the computer and attached devices from the electrical outlet and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.
  • Page 14 Hard Drive and Fixed Optical Drive: Dell Latitude C840 Service Manual 4. Use the pull tab to remove the fixed optical drive. Back to Contents Page file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...20ok/Latitude/C840/C840_SERVICE_MANUAL/hdd.htm (4 of 4)6/21/2004 1:36:11 AM...

  • Page 15: Memory Modules

    System Upgrades: Dell Latitude C840 Service Manual Back to Contents Page System Upgrades Dell™ Latitude™ C840 Service Manual Memory Modules Modem Daughter Card Mini PCI Card Memory Modules NOTICE: Disconnect the computer and any attached devices from electrical outlets and remove any installed batteries.
  • Page 16 System Upgrades: Dell Latitude C840 Service Manual M2.5 x 20-mm screw 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the M2.5 x 20-mm screw from the memory module/modem cover. 3. Disengage the metal tabs at the opposite end of the cover.

  • Page 17: Removing The Memory Modules

    System Upgrades: Dell Latitude C840 Service Manual 1 DIMM B 2 memory module sockets (2) 3 DIMM A socket 4 modem daughter card 5 metal tabs (2 per socket) 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 each side of the module until the module pops up slightly.

  • Page 18: Modem Daughter Card

    System Upgrades: Dell Latitude C840 Service Manual memory module in the socket labeled "DIMM B." NOTE: Memory modules are keyed to fit into their sockets in only one direction. 2. Insert the memory-module edge connector into the socket slot at a 45-degree angle and press the module firmly into the slot.
  • Page 19 System Upgrades: Dell Latitude C840 Service Manual modem daughter card M2 x 3-mm screw 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 straight up out of its connector.

  • Page 20: Mini Pci Card

    System Upgrades: Dell Latitude C840 Service Manual Mini PCI Card You must remove the optional Mini PCI wireless modem (if installed) before the system board can be removed. A wireless modem card must be connected to the internal antenna of the computer.

  • Page 21: Replacing The Mini Pci Card

    System Upgrades: Dell Latitude C840 Service Manual 3. To release the Mini PCI card, spread the metal securing tabs until the card pops up slightly. 4. Disconnect the card from the internal antenna. 5. Lift out the card and disconnect any attached cables.
  • Page 22 System Upgrades: Dell Latitude C840 Service Manual 3. Pivot the Mini PCI card down until it clicks into place. 4. Replace the Mini PCI card cover and the M2.5 x 20-mm screw. Back to Contents Page file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...Latitude/C840/C840_SERVICE_MANUAL/upgrades.htm (8 of 8)6/21/2004 1:36:13 AM...
  • Page 23 Keyboard: Dell Latitude C840 Service Manual Back to Contents Page Keyboard Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.

  • Page 24: Removing The Keyboard

    Keyboard: Dell Latitude C840 Service Manual Removing the Keyboard 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Turn the computer over and remove the four M2.5 x 20-mm screws (three labeled "circle K" and one labeled "circle K/M").

  • Page 25: Replacing The Keyboard

    Keyboard: Dell Latitude C840 Service Manual keyboard right side of computer 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. Pivot the keyboard and balance it upright on the left side of the computer.
  • Page 26 Keyboard: Dell Latitude C840 Service Manual 1. While bracing the keyboard upright on its left end, connect the keyboard cable to the keyboard interface connector on the system board. NOTICE: Position the keyboard/track-stick flex cable so that it is not pinched when you replace the keyboard in the bottom case.
  • Page 27 Display: Dell Latitude C840 Service Manual Back to Contents Page Display Dell™ Latitude™ C840 Service Manual Display Overview Hinge Cover Display Assembly Display Bezel Display Panel Display Latch Display Overview NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries.
  • Page 28 Display: Dell Latitude C840 Service Manual 1 display 2 hinge cover 3 M2.5 x 6-mm screws (3) 4 bottom case 5 display flex cable file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA.../Latitude/C840/C840_SERVICE_MANUAL/display.htm (2 of 10)6/21/2004 1:36:15 AM...

  • Page 29: Hinge Cover

    Display: Dell Latitude C840 Service Manual Hinge Cover 1 hinge cover 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Use a nonmarring plastic scribe to loosen the hinge cover at the back and at each side of the computer.
  • Page 30 Display: Dell Latitude C840 Service Manual 1 M2.5 x 6-mm screws (2) 1. Remove the hinge cover. NOTICE: Remove the display flex cable before you remove the display assembly. file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA.../Latitude/C840/C840_SERVICE_MANUAL/display.htm (4 of 10)6/21/2004 1:36:15 AM...
  • Page 31 Display: Dell Latitude C840 Service Manual M2.5 x 6-mm screw strain relief display flex cable pull loop 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.

  • Page 32: Top Cover

    Display: Dell Latitude C840 Service Manual M2.5 x 4-mm screws (6) M2 x 3-mm screws (6) rubber screw covers (4) top cover display bezel hinge cover file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA.../Latitude/C840/C840_SERVICE_MANUAL/display.htm (6 of 10)6/21/2004 1:36:15 AM...

  • Page 33: Display Panel

    Display: Dell Latitude C840 Service Manual plastic tabs (6) display flex cable M2.5 x 4-mm screw display panel flex-cable mounting bracket plastic screw covers (2) display latch Display Bezel 1. Use a scribe to pry out the four rubber screw covers located across the top of the bezel.

  • Page 34: Replacing The Display Panel

    Display: Dell Latitude C840 Service Manual ZIF connector standard connector Replacing the Display Panel NOTE: Use a magnetic screwdriver to reassemble the display panel in the display. 1. Connect the flex cable to the two connectors on the back of the display panel.

  • Page 35: Display Latch

    Display: Dell Latitude C840 Service Manual 3. Reinstall the M2.5 x 4-mm screw that secures the flex-cable mounting bracket to the top cover. 4. Starting on the left side, use a magnetic screwdriver to reinstall the six M2 x 3-mm screws that secure the display panel in the top cover.
  • Page 36 Display: Dell Latitude C840 Service Manual Back to Contents Page file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/L...Latitude/C840/C840_SERVICE_MANUAL/display.htm (10 of 10)6/21/2004 1:36:15 AM...

  • Page 37: Removing The Microprocessor Thermal-Cooling Assembly

    Microprocessor Thermal-Cooling Assembly: Dell Latitude C840 Service Manual Back to Contents Page Microprocessor Thermal-Cooling Assembly Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.
  • Page 38 Microprocessor Thermal-Cooling Assembly: Dell Latitude C840 Service Manual 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the keyboard. 3. Remove the hinge cover. 4. Insert a non-marring plastic scribe into the latch mechanism at the left side of the microprocessor retaining clip.
  • Page 39 Microprocessor Thermal-Cooling Assembly: Dell Latitude C840 Service Manual file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA.../Latitude/C840/C840_SERVICE_MANUAL/thermal.htm (3 of 3)6/21/2004 1:36:16 AM...

  • Page 40: Microprocessor Module

    Microprocessor Module: Dell Latitude C840 Service Manual Back to Contents Page Microprocessor Module Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.
  • Page 41 Microprocessor Module: Dell Latitude C840 Service Manual 4. Remove the microprocessor thermal-cooling assembly. NOTICE: When removing the microprocessor module, pull the module straight up. Do not bend the pins. 5. Remove the microprocessor module. NOTICE: To avoid damage to the microprocessor, hold the screwdriver so that it is perpendicular to the microprocessor when loosening the cam screw (see "Microprocessor Cam...

  • Page 42: Replacing The Microprocessor Module

    Microprocessor Module: Dell Latitude C840 Service Manual 2 perpendicular screwdriver 3 processor die (do not touch) b. Use the microprocessor extraction tool to remove the microprocessor module. Replacing the Microprocessor Module NOTICE: If you received a flash BIOS update floppy disk or CD with the replacement microprocessor, you must update the BIOS after replacing the microprocessor module.
  • Page 43 Microprocessor Module: Dell Latitude C840 Service Manual 4. Close the microprocessor retaining clip. 5. To latch the clip, insert a flat-blade scribe into the latch mechanism and pivot the top of the scribe away from the clip. Back to Contents Page...
  • Page 44 Video Graphics Board: Dell Latitude C840 Service Manual Back to Contents Page Video Graphics Board Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.
  • Page 45 5. Remove the three M2.5 x 8-mm screws that secure the video graphics board. 6. Separate the video graphics board from the system board connector. Replacing the Video Graphics Board 1. Align the three screw holes and press down firmly on the word "Dell" to seat the board in its connector. NOTICE: Ensure that the board is correctly and firmly seated before continuing.

  • Page 46: Palm Rest

    Palm Rest: Dell Latitude C840 Service Manual Back to Contents Page Palm Rest Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.

  • Page 47: Removing The Palm Rest

    Palm Rest: Dell Latitude C840 Service Manual Removing the Palm Rest 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the hard drive and the fixed optical drive. 3. Remove the keyboard. 4. Remove the hinge cover.

  • Page 48: Replacing The Palm Rest

    Palm Rest: Dell Latitude C840 Service Manual M2.5 x 20-mm screws (9) 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. On the left and right sides of the palm rest, use a flat-blade scribe between the palm rest and the bottom case of the computer to separate the snaps that secure the palm rest to the bottom case.
  • Page 49 Palm Rest: Dell Latitude C840 Service Manual Back to Contents Page file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...Latitude/C840/C840_SERVICE_MANUAL/palmrest.htm (4 of 4)6/21/2004 1:36:19 AM...

  • Page 50: Reserve Battery

    Reserve Battery: Dell Latitude C840 Service Manual Back to Contents Page Reserve Battery Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.

  • Page 51: Removing The Reserve Battery

    Reserve Battery: Dell Latitude C840 Service Manual Removing the Reserve Battery 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the keyboard. 3. Remove the hinge cover. 4. Remove the display assembly. 5. Remove the palm rest.

  • Page 52: Replacing The Reserve Battery

    Reserve Battery: Dell Latitude C840 Service Manual 10. Remove the reserve battery: a. Pry the reserve battery free from the metal palm rest bracket. b. Remove the foam-pad remnants from the palm rest bracket. Replacing the Reserve Battery 1. Seat the reserve battery and press it into place.
  • Page 53 System Board: Dell Latitude C840 Service Manual Back to Contents Page System Board Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.

  • Page 54: Removing The System Board

    System Board: Dell Latitude C840 Service Manual 2 system board 3 network connector 4 modem connector 5 network cable cover 6 M2.5 x 20-mm screw The BIOS chip on the system board contains the service tag sequence, which is also visible on a bar code label on the bottom of the computer.
  • Page 55 System Board: Dell Latitude C840 Service Manual network cable cover b. Disconnect the network cable. Do not pull on the cable wires. Instead, pry up the outer corner of the upper connector until the connectors start to separate. file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...Latitude/C840/C840_SERVICE_MANUAL/sysboard.htm (3 of 5)6/21/2004 1:36:21 AM...
  • Page 56 System Board: Dell Latitude C840 Service Manual 1 outer corner of upper connector 2 network cable 14. Remove the three M2.5 x 4-mm captive-washer screws from the system board. 15. Remove the M2.5 x 20-mm screw from the center of the LED board.
  • Page 57 System Board: Dell Latitude C840 Service Manual Back to Contents Page file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...Latitude/C840/C840_SERVICE_MANUAL/sysboard.htm (5 of 5)6/21/2004 1:36:21 AM...
  • Page 58 Battery and Module Bay Latches: Dell Latitude C840 Service Manual Back to Contents Page Battery and Module Bay Latches Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.
  • Page 59 Battery and Module Bay Latches: Dell Latitude C840 Service Manual wear ribs (2 on underside) bumps slider spring bottom case latch housing (2) latch buttons (2) location of snap tabs (2) Removing and Replacing the Battery and Module Bay Latches 1.
  • Page 60 Battery and Module Bay Latches: Dell Latitude C840 Service Manual Back to Contents Page file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...Latitude/C840/C840_SERVICE_MANUAL/baylatch.htm (3 of 3)6/21/2004 1:36:22 AM...
  • Page 61 Battery Charger Board: Dell Latitude C840 Service Manual Back to Contents Page Battery Charger Board Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.
  • Page 62 Battery Charger Board: Dell Latitude C840 Service Manual 5. Remove the palm rest. 6. Remove the video graphics board. 7. Lift the battery charger board out of the system board connector. Replacing the Battery Charger Board Align the screw holes on the battery charger board with the screw holes on the bottom case, and then press the battery charger board down into its connector.

  • Page 63: Led Board

    LED Board: Dell Latitude C840 Service Manual Back to Contents Page LED Board Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.

  • Page 64: Removing The Led Board

    LED Board: Dell Latitude C840 Service Manual Removing the LED Board 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the hinge cover. 3. Remove the two M2 x 4-mm screws. 4. Lift the LED board away from its connector.

  • Page 65: Removing The Fan

    Fan: Dell Latitude C840 Service Manual Back to Contents Page Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.
  • Page 66 Fan: Dell Latitude C840 Service Manual 3. Remove the three M2 x 4-mm screws from the fan. 4. Disconnect the two fan cables from the system board. 5. Pull the fan away from the back-panel bracket. NOTICE: When reconnecting the fan cables, connect the shorter cable to the connector closest to the fan.
  • Page 67 RJ-11/RJ-45 Module: Dell Latitude C840 Service Manual Back to Contents Page RJ-11/RJ-45 Module Dell™ Latitude™ C840 Service Manual NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.
  • Page 68 RJ-11/RJ-45 Module: Dell Latitude C840 Service Manual 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the system board. 3. From outside the bottom case, push in and up on the RJ-11/RJ-45 module while pulling the side of the bottom case slightly outward.
  • Page 69 RJ-11/RJ-45 Module: Dell Latitude C840 Service Manual Back to Contents Page file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...Latitude/C840/C840_SERVICE_MANUAL/rj11_45b.htm (3 of 3)6/21/2004 1:36:25 AM...

  • Page 70: Usb Connector

    Pin Assignments for I/O Connectors: Dell Latitude C840 Service Manual Back to Contents Page Pin Assignments for I/O Connectors Dell™ Latitude™ C840 Service Manual USB Connector Signal -Data +Data Ground Serial Connector file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA.../Latitude/C840/C840_SERVICE_MANUAL/pinouts.htm (1 of 9)6/21/2004 1:36:27 AM...
  • Page 71 Pin Assignments for I/O Connectors: Dell Latitude C840 Service Manual Signal Signal RXDA TXDA Parallel Connector Signal Signal STRB# BUSY file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA.../Latitude/C840/C840_SERVICE_MANUAL/pinouts.htm (2 of 9)6/21/2004 1:36:27 AM...

  • Page 72: Video Connector

    Pin Assignments for I/O Connectors: Dell Latitude C840 Service Manual SLCT AFDF# ERROR# INIT# PD5F SLCT_IN PD6F 18-23 PD7F DFDD/LPT# ACK# Video Connector Signal Signal CRT_VCC GREEN BLUE MSEN# DAT_DDC2 HSYNC VSYNC CLK_DDC2 file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA.../Latitude/C840/C840_SERVICE_MANUAL/pinouts.htm (3 of 9)6/21/2004 1:36:27 AM...
  • Page 73 Pin Assignments for I/O Connectors: Dell Latitude C840 Service Manual PS/2 Connector Signal DAT_KBD DAT_SM1 PS2VCC CLK_KBD CLK_SM1 S-Video TV-Out Connector file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA.../Latitude/C840/C840_SERVICE_MANUAL/pinouts.htm (4 of 9)6/21/2004 1:36:27 AM...

  • Page 74: Docking Connector

    Pin Assignments for I/O Connectors: Dell Latitude C840 Service Manual S-Video Signal DLUMA-L DCRMA-L Composite Video Signal SPDIF DCMPS-L SPGND Docking Connector Signal Signal STRB#/5V VGA_GRN file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA.../Latitude/C840/C840_SERVICE_MANUAL/pinouts.htm (5 of 9)6/21/2004 1:36:27 AM...
  • Page 75 Pin Assignments for I/O Connectors: Dell Latitude C840 Service Manual VGA_RED VGA_BLU DOCK_SD/MODE D_IRTX D_IRRX SPIRQB# DOCK_SPKR SPIRQC# DOCK_MIC DAT_DDC2 DOCK_LINE CLK_DDC2 DOCK_CDROM SPAR SPME# M_SEN# POWER_SW# SSERR# QPCIEN# SPERR# S1.6M_EN# SLOCK# DFDD/LPT# SSTOP# SDEVSEL# STRDY# D_ATCTLED SIRDY# D_PWRLED SFRAME#...
  • Page 76 Pin Assignments for I/O Connectors: Dell Latitude C840 Service Manual +5VDOCK SWRPRT# DOCK_PWR_SRC SDSKCHG#/DRQ DOCK_PWR_SRC SDIR# DOCK_PWR_SRC STRK0# DOCK_PWR_SRC SSTEP# SDRV1# DOCK_+DC_IN DOCK_+DC_IN SMRT1# DOCK_+DC_IN SWRDATA# DOCK_+DC_IN SWGATE# DOCK_+DC_IN SRDATA# DOCK_+DC_IN SINDEX# DOCK_+DC_IN DOCK_+DC_IN +5VALW LOW_PWR HSYNC VSYNC CLK_SPCI DOCKED...
  • Page 77 Pin Assignments for I/O Connectors: Dell Latitude C840 Service Manual DOCK_LRCK SAD9 DOCK_MCLK SAD10 SAD11 +12V SAD12 AFD# ERROR# SAD13 ACK# SAD14 SAD15 INIT# SAD16 SLCT_IN# SC/BE1# BUSY CD/BE2# SLCT SAD17 SAD18 DAT_SMB SAD19 DCLK_SMB SAD20 SMB_INIT# SAD21 DAT_DOCKSM1 SAD22...

  • Page 78: Ieee 1394 Connector

    Pin Assignments for I/O Connectors: Dell Latitude C840 Service Manual DCD0 +5VSUS IEEE 1394 Connector Signal TPB- TPB+ TPA- TPA+ Back to Contents Page file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA.../Latitude/C840/C840_SERVICE_MANUAL/pinouts.htm (9 of 9)6/21/2004 1:36:27 AM...

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