dell latitude c540 User Manual
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![Page 16
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
NOTICE: To prevent damage to the memory module connector, do not use
tools to spread the inner metal tabs that secure the memory module.
2. Use your fingertips to carefully spread apart the inner tabs on each end\
of the memory module socket. The module should pop up.
1 JDIM 2 memory socket
2 JDIM 1 memory socket
3 keying tab
4 keying notch
5 inner tabs (2 per socket)
3. Lift the memory module out of its socket....](http://img.usermanuals.tech/thumb/19/48080/w64_dell-latitude-c540-service-manual-15.png "Page 16
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
NOTICE: To prevent damage to the memory module connector, do not use
tools to spread the inner metal tabs that secure the memory module.
2. Use your fingertips to carefully spread apart the inner tabs on each end\
of the memory module socket. The module should pop up.
1 JDIM 2 memory socket
2 JDIM 1 memory socket
3 keying tab
4 keying notch
5 inner tabs (2 per socket)
3. Lift the memory module out of its socket....")
![Page 17
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
Replacing the Memory Modules
1. If you only have one memory module, install it in the connector labeled \
JDIM1 on the system board. Install a second memory module in the connector lab\
eled
JDIM2.
NOTE: Memory modules are keyed, or designed to fit into their sockets, in only\
one direction.
NOTICE: The memory module must be inserted at a 45-degree angle to avoid
damaging the connector.
2. Align the notch in the...](http://img.usermanuals.tech/thumb/19/48080/w64_dell-latitude-c540-service-manual-16.png "Page 17
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
Replacing the Memory Modules
1. If you only have one memory module, install it in the connector labeled \
JDIM1 on the system board. Install a second memory module in the connector lab\
eled
JDIM2.
NOTE: Memory modules are keyed, or designed to fit into their sockets, in only\
one direction.
NOTICE: The memory module must be inserted at a 45-degree angle to avoid
damaging the connector.
2. Align the notch in the...")
![Page 18
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
NOTICE: Read Preparing to Work Inside the Computer before performing the
following procedure.
1. Remove the
memory module cover, which also covers the Mini-PCI card.
2. Disconnect the Mini PCI card from the antenna cables.
3. To release a Mini PCI card from its socket, spread apart the metal secur\
ing tabs until the card pops up slightly.
4. Lift the Mini PCI card out of its connector.
1 antenna connectors...](http://img.usermanuals.tech/thumb/19/48080/w64_dell-latitude-c540-service-manual-17.png "Page 18
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
NOTICE: Read Preparing to Work Inside the Computer before performing the
following procedure.
1. Remove the
memory module cover, which also covers the Mini-PCI card.
2. Disconnect the Mini PCI card from the antenna cables.
3. To release a Mini PCI card from its socket, spread apart the metal secur\
ing tabs until the card pops up slightly.
4. Lift the Mini PCI card out of its connector.
1 antenna connectors...")
![Page 19
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
1. Align the Mini PCI card with the socket at a 45-degree angle, and press \
the Mini PCI card into the socket.
NOTICE: The connectors are keyed for correct insertion; do not force the
connections.
2. Pivot the Mini PCI card down until it snaps into the inner tabs of the s\
ocket.
3. Attach the antenna cables to the Mini PCI card.
4. Replace the memory module cover and tighten the two captive screws.
Modem...](http://img.usermanuals.tech/thumb/19/48080/w64_dell-latitude-c540-service-manual-18.png "Page 19
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
1. Align the Mini PCI card with the socket at a 45-degree angle, and press \
the Mini PCI card into the socket.
NOTICE: The connectors are keyed for correct insertion; do not force the
connections.
2. Pivot the Mini PCI card down until it snaps into the inner tabs of the s\
ocket.
3. Attach the antenna cables to the Mini PCI card.
4. Replace the memory module cover and tighten the two captive screws.
Modem...")
![Page 20
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
3. Pull straight up on the attached pull-tab to lift the modem out of its c\
onnector on the system board and disconnect the modem cable.
1 M2 x 3-mm screws (2)
2 modem connector
3 modem cable
4 pull-tab
Replacing the Modem
1. Connect the modem cable to the modem.
NOTICE: The connectors are keyed for correct insertion; do not force the
connections.
file:///F|/Service%20Manuals/Dell/Latitude/c540-640/upgrades.htm...](http://img.usermanuals.tech/thumb/19/48080/w64_dell-latitude-c540-service-manual-19.png "Page 20
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
3. Pull straight up on the attached pull-tab to lift the modem out of its c\
onnector on the system board and disconnect the modem cable.
1 M2 x 3-mm screws (2)
2 modem connector
3 modem cable
4 pull-tab
Replacing the Modem
1. Connect the modem cable to the modem.
NOTICE: The connectors are keyed for correct insertion; do not force the
connections.
file:///F|/Service%20Manuals/Dell/Latitude/c540-640/upgrades.htm...")
![Page 21
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
2. Align the modem with the screw holes on the system board and press down on the pull-tab to seat the modem in the connector.
NOTICE: Pressing down on the modem somewhere other than on the pull-tab
can break the modem.
3. Install the two M2 x 3-mm screws that secure the modem to the system boa\
rd.
4. Replace the
memory module cover and tighten the two captive screws.
Back to Contents Page...](http://img.usermanuals.tech/thumb/19/48080/w64_dell-latitude-c540-service-manual-20.png "Page 21
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\
e Manual
2. Align the modem with the screw holes on the system board and press down on the pull-tab to seat the modem in the connector.
NOTICE: Pressing down on the modem somewhere other than on the pull-tab
can break the modem.
3. Install the two M2 x 3-mm screws that secure the modem to the system boa\
rd.
4. Replace the
memory module cover and tighten the two captive screws.
Back to Contents Page...")
![Page 23
Keyboard: Dell Latitude C540/C640 Service Manual
1 M2.5 x 12-mm screws
(5)
3. Turn the computer over and open the display.
NOTICE: The keycaps on the keyboard are fragile, easily dislodged, and time-
consuming to replace. Be careful when removing and handling the keyboard\
.
4. Remove the center control cover: a. Insert a small, flat-blade screwdriver or plastic scribe into the notch \
at the right end of the center control cover and pry up the cover.
b. Lift the center control cover up and...](http://img.usermanuals.tech/thumb/19/48080/w64_dell-latitude-c540-service-manual-22.png "Page 23
Keyboard: Dell Latitude C540/C640 Service Manual
1 M2.5 x 12-mm screws
(5)
3. Turn the computer over and open the display.
NOTICE: The keycaps on the keyboard are fragile, easily dislodged, and time-
consuming to replace. Be careful when removing and handling the keyboard\
.
4. Remove the center control cover: a. Insert a small, flat-blade screwdriver or plastic scribe into the notch \
at the right end of the center control cover and pry up the cover.
b. Lift the center control cover up and...")
![Page 24
Keyboard: Dell Latitude C540/C640 Service Manual
5. To release the keyboard from the palm rest, use a small, flat-blade scre\
wdriver or plastic scribe to pry up the right edge of the keyboard near the blan\
k key.
file:///F|/Service%20Manuals/Dell/Latitude/c540-640/keyboard.htm (3 of \
6) [2/28/2004 7:57:48 AM]](http://img.usermanuals.tech/thumb/19/48080/w64_dell-latitude-c540-service-manual-23.png "Page 24
Keyboard: Dell Latitude C540/C640 Service Manual
5. To release the keyboard from the palm rest, use a small, flat-blade scre\
wdriver or plastic scribe to pry up the right edge of the keyboard near the blan\
k key.
file:///F|/Service%20Manuals/Dell/Latitude/c540-640/keyboard.htm (3 of \
6) [2/28/2004 7:57:48 AM]")
![Page 25
Keyboard: Dell Latitude C540/C640 Service Manual
1keyboard
2 track stick
3 blank key
4 palm rest
6. Lift the keyboard straight up about an inch and then rotate it forward t\
oward the front of the computer, until the key face is resting on the palm rest.
NOTICE: Do not pull on the keyboard flex and track stick cables.
7. Pull up on the keyboard connector to disconnect it from the keyboard int\
erface connector on the system board.
1 boss supports (5)
2 track stick cable
3...](http://img.usermanuals.tech/thumb/19/48080/w64_dell-latitude-c540-service-manual-24.png "Page 25
Keyboard: Dell Latitude C540/C640 Service Manual
1keyboard
2 track stick
3 blank key
4 palm rest
6. Lift the keyboard straight up about an inch and then rotate it forward t\
oward the front of the computer, until the key face is resting on the palm rest.
NOTICE: Do not pull on the keyboard flex and track stick cables.
7. Pull up on the keyboard connector to disconnect it from the keyboard int\
erface connector on the system board.
1 boss supports (5)
2 track stick cable
3...")
![Page 26
Keyboard: Dell Latitude C540/C640 Service Manual
4keyboard interface
connector
5 orientation label
8. Remove the keyboard from the bottom case.
Replacing the Keyboard
1. Place the keyboard on the palm rest at the front of the computer with th\
e keys face down and the connector toward the back of the computer.
NOTICE: To avoid damage to the connector pins, press the keyboard connector
evenly into the interface connector on the system board, and do not reve\
rse the
keyboard connector.
2....](http://img.usermanuals.tech/thumb/19/48080/w64_dell-latitude-c540-service-manual-25.png "Page 26
Keyboard: Dell Latitude C540/C640 Service Manual
4keyboard interface
connector
5 orientation label
8. Remove the keyboard from the bottom case.
Replacing the Keyboard
1. Place the keyboard on the palm rest at the front of the computer with th\
e keys face down and the connector toward the back of the computer.
NOTICE: To avoid damage to the connector pins, press the keyboard connector
evenly into the interface connector on the system board, and do not reve\
rse the
keyboard connector.
2....")
Memory Modules, Mini PCI Card, and Modem: Dell Latitude C540/C640 Servic\ e Manual 2. Align the modem with the screw holes on the system board and press down on the pull-tab to seat the modem in the connector. NOTICE: Pressing down on the modem somewhere other than on the pull-tab can break the modem. 3. Install the two M2 x 3-mm screws that secure the modem to the system boa\ rd. 4. Replace the memory module cover and tighten the two captive screws. Back to Contents Page file:///F|/Service%20Manuals/Dell/Latitude/c540-640/upgrades.htm (8 of \ 8) [2/28/2004 7:57:48 AM]
Keyboard: Dell Latitude C540/C640 Service Manual Back to Contents Page Keyboard Dell™ Latitude™ C540/C640 Service Manual Removing the Keyboard NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by touching an unpainted metal surface on the computer. NOTICE: Read Preparing to Work Inside the Computer before performing the following procedure. 1. Remove the hard drive. 2. Turn the computer over, and remove the five M2.5 x 12-mm screws labeled \ circle K. file:///F|/Service%20Manuals/Dell/Latitude/c540-640/keyboard.htm (1 of \ 6) [2/28/2004 7:57:48 AM]
Keyboard: Dell Latitude C540/C640 Service Manual 1 M2.5 x 12-mm screws (5) 3. Turn the computer over and open the display. NOTICE: The keycaps on the keyboard are fragile, easily dislodged, and time- consuming to replace. Be careful when removing and handling the keyboard\ . 4. Remove the center control cover: a. Insert a small, flat-blade screwdriver or plastic scribe into the notch \ at the right end of the center control cover and pry up the cover. b. Lift the center control cover up and away from the bottom case. file:///F|/Service%20Manuals/Dell/Latitude/c540-640/keyboard.htm (2 of \ 6) [2/28/2004 7:57:48 AM]
Keyboard: Dell Latitude C540/C640 Service Manual 5. To release the keyboard from the palm rest, use a small, flat-blade scre\ wdriver or plastic scribe to pry up the right edge of the keyboard near the blan\ k key. file:///F|/Service%20Manuals/Dell/Latitude/c540-640/keyboard.htm (3 of \ 6) [2/28/2004 7:57:48 AM]
Keyboard: Dell Latitude C540/C640 Service Manual 1keyboard 2 track stick 3 blank key 4 palm rest 6. Lift the keyboard straight up about an inch and then rotate it forward t\ oward the front of the computer, until the key face is resting on the palm rest. NOTICE: Do not pull on the keyboard flex and track stick cables. 7. Pull up on the keyboard connector to disconnect it from the keyboard int\ erface connector on the system board. 1 boss supports (5) 2 track stick cable 3 keyboard flex cable file:///F|/Service%20Manuals/Dell/Latitude/c540-640/keyboard.htm (4 of \ 6) [2/28/2004 7:57:48 AM]
Keyboard: Dell Latitude C540/C640 Service Manual 4keyboard interface connector 5 orientation label 8. Remove the keyboard from the bottom case. Replacing the Keyboard 1. Place the keyboard on the palm rest at the front of the computer with th\ e keys face down and the connector toward the back of the computer. NOTICE: To avoid damage to the connector pins, press the keyboard connector evenly into the interface connector on the system board, and do not reve\ rse the keyboard connector. 2. Connect the keyboard connector to the interface connector on the system \ board. The keyboard connector may have a label showing the correct orientation \ of the keyboard connector (relative to the display) in the system-board inter\ face connector. 3. Carefully turn the keyboard over. Align the keyboard boss supports, fit \ the left side of the keyboard into place, and then snap the right side of the key\ board into place. NOTICE: Position the keyboard flex and track stick cables so that they are not pinched when you replace the keyboard in the bottom case. 4. Check that the keyboard is correctly installed. The keys should be flush\ with the left and right surfaces of the palm rest. 5. Replace the center control cover, close the display assembly, and then t\ urn the computer over. 6. Reinstall the five M2.5 x 12-mm screws in the holes labeled circle K. \ file:///F|/Service%20Manuals/Dell/Latitude/c540-640/keyboard.htm (5 of \ 6) [2/28/2004 7:57:48 AM]
Keyboard: Dell Latitude C540/C640 Service Manual Back to Contents Page file:///F|/Service%20Manuals/Dell/Latitude/c540-640/keyboard.htm (6 of \ 6) [2/28/2004 7:57:48 AM]
Display Assembly, Display Latch, and Hinge Covers: Dell Latitude C540/C6\ 40 Service Manual Back to Contents Page Display Assembly, Display Latch, and Hinge Covers Dell™ Latitude™ C540/C640 Service Manual Display Assembly Display Latch Hinge Covers Display Assembly NOTICE: You must remove the display assembly before you remove the palm rest. NOTICE: Disconnect the computer and any attached devices from electrical outlets\ , and remove any installed batteries. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by touching an unpainted metal surface on the computer. NOTICE: Read Preparing to Work Inside the Computer before performing the following procedureDisplay Assembly 1. Remove the hard drive. 2. Remove the center control cover. 3. Remove the keyboard. 4. Close the display. 5. From the back of the computer, remove the five M2.5 x 5-mm screws labele\ d circle D. 6. Open the display assembly approximately 180 degrees and support the disp\ lay assembly so that it does not open past this position. 7. Remove the two M2 x 3-mm screws on the EMI shield bracket, which is atta\ ched to the display-feed flex cable. file:///F|/Service%20Manuals/Dell/Latitude/c540-640/display.htm (1 of 1\ 2) [2/28/2004 7:57:51 AM]
Display Assembly, Display Latch, and Hinge Covers: Dell Latitude C540/C6\ 40 Service Manual 1M2 x 3-mm screws (2) 2 top cover 3 center control cover 4 M2.5 x 5-mm screws (5) 5 bottom case 6 display-feed flex cable 7 EMI shield bracket 8. Remove the two M2 x 3-mm screws that secure the display-feed flex cable \ to the system board. file:///F|/Service%20Manuals/Dell/Latitude/c540-640/display.htm (2 of 1\ 2) [2/28/2004 7:57:51 AM]
Display Assembly, Display Latch, and Hinge Covers: Dell Latitude C540/C6\ 40 Service Manual NOTICE: When reconnecting the display-feed flex cable connector to the system board, push down on the top left and right ends of the connector. Pressi\ ng on the center of the connector may damage resistors and compromise EMI protecti\ on in the computer. 1 M2 x 3-mm screws (2) 2 pull-tab 3 display-feed cable connector 4 interface connector 9. Pull up on the pull-tab that is attached to the display-feed flex cable \ connector to file:///F|/Service%20Manuals/Dell/Latitude/c540-640/display.htm (3 of 1\ 2) [2/28/2004 7:57:51 AM]