Instruction/ maintenance manual of the product C400 Dell
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Dell™ Latitude™ C400 Service Manual Before You Begin System Components Keyboard Memory Module and Modem Daughter Card Hard Drive Wireless Network Adapter Display Assembly and Display Latch Palm Re.
Back to Contents Page Before You Begin Dell™ Latitude™ C400 Service Manual Preparing to Work Inside the Computer Recommended Tools Screw Identification Preparing to Work Inside the Computer NOTICE: Only a certified service technician should perform repairs on your computer.
5 -mm nut driver 7 -mm nut driver Needle - nose pliers Flash BIOS update program floppy disk or CD Computer Orientation 1 back 2 right 3 front 4 left Screw Identification When you are removing and replacing components, photocopy the placemat as a tool to lay out and keep track of the screws.
Hard Drive Door: (1 each) Modem Daughter Card: (1 each) Keyboard: (4 each) Display Assembly: Display Bezel: (6 each) Rubber screw covers: 6 each Palm Rest to Bottom Case: Critical Component Shield: (6.
System Board: (1 each) Guide pins: 2 each 5 -mm hex nuts: 4 each 7 -mm hex nuts: 2 each Back to Contents Page.
Back to Contents Page System Components Dell™ Latitude™ C400 Service Manual 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.
Back to Contents Page.
Back to Contents Page Keyboard Dell™ Latitude™ C400 Service Manual Removing the Keyboard Replacing the Keyboard Removing the Keyboard NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries.
row or two of keycaps, and press on the straightedge instead of on the keycaps themselves. c . Insert a flat - blade screwdriver into the slot. While holding the screwdriver, make your hand into a fist, brace your knuckles against the keyboard, and pry up the center cover.
1 keyboard flex cable 6 . Use the pull tab to pull the keyboard flex cable up from its connector on the system board. The keyboard is now disconnected from the bottom case. Replacing the Keyboard 1 . Replace the hard drive . 2 . Place the keyboard face - down on the palm rest, with the keyboard flex cable pointing toward the back of the computer.
1 keyboard securing tabs (5) 4 . Carefully rotate the keyboard back and fit it into the bottom case. Ensure that all five securing tabs are engaged in their respective slots before trying to completely seat the keyboard. Fitting the tabs to the slots may be easiest when viewed from above and slightly behind the front edge of the keyboard.
Back to Contents Page Memory Module and Modem Daughter Card Dell™ Latitude™ C400 Service Manual Removing the Memory Module/Modem Cover Removing the Memory Modules Replacing the Memory Modules Remo.
Removing the Memory Modules NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove the battery. NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by touching an unpainted metal surface on the computer.
NOTICE: The memory module must be inserted at a 45 - degree angle to avoid damaging the connector. 1 . Align the notch in the memory module with the slot in the center of the socket. 2 . Slide the edge connector of the module firmly into the socket at a 45 - degree angle, and rotate the module down until you hear a click.
2 pull tab 3 boss 4 modem connector 5 modem cable Replacing the Modem Daughter Card 1 . Connect the modem cable to the modem daughter card. NOTICE: The connectors are keyed for correct insertion; do not force the connections.
Back to Contents Page Hard Drive Dell™ Latitude™ C400 Service Manual Removing the Hard Drive Replacing the Hard Drive Removing the Hard Drive 1 . Save and close any open files, exit any open programs, and shut down the computer. NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove the battery.
4 . Slide the hard drive straight out of the computer. Replacing the Hard Drive NOTICE: Use firm and even pressure to slide the hard drive into place. If you force the hard drive into place using excessive force, you may damage the connector. 1 . Push the hard drive into the drive bay until it is fully seated in the bay.
Back to Contents Page Wireless Network Adapter Dell™ Latitude™ C400 Service Manual Removing the Wireless Network Adapter Replacing the Wireless Network Adapter Removing the Wireless Network Adapter NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries.
down into place. Back to Contents Page.
Back to Contents Page Display Assembly and Display Latch Dell™ Latitude™ C400 Service Manual Removing the Display Assembly Replacing the Display Latch Removing the Display Assembly NOTICE: You must remove the display assembly before you remove the palm rest.
Display Assembly 1 display - feed flex cable 2 M2.5 x 12 - mm screws (2) 3 display - feed flex cable hold- down board 4 pull tab 7 . Remove the two M2.5 x 12 - mm screws from the display - feed flex cable hold - down board. 8 . Use the pull tab to disconnect the display - feed flex cable from its connector on the system board.
To replace the display latch, you must replace the whole bezel. 1 . Remove the battery. 2 . Remove the hard drive . 3 . Open the display 180 degrees, and remove the six rubber screw covers and the six M2 x 4 - mm screws that secure the bezel. Bezel Removal 1 bezel 2 display latch 3 M2 x 4 - mm screw (6) 4 display assembly 4 .
Back to Contents Page Palm Rest Dell™ Latitude™ C400 Service Manual Removing the Palm Rest Replacing the Palm Rest Removing the Palm Rest NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries.
1 M2.5 x 6 - mm screws (4) 2 M2.6 x 1.8 - mm screws (4) 3 M2 x 4 - mm screws (2) 4 M2.5 x 6 - mm screws (2) 5 . Remove the four M2.6 x 1.8 - mm screws located inside the battery bay. 6 . Remove the two M2.5 x 6 - mm screws located near the service tag at the back edge of the computer.
1 M2.5 x 6 - mm screws (6) 2 LED cable 3 palm -rest flex cable 9 . Remove the six M2.5 x 6 - mm screws that secure the palm rest to the system board. 10 . Disconnect the LED and palm -rest flex cables. 11 . If a Mini PCI wireless card is installed, disconnect the two wireless cables from the card.
Back to Contents Page Cooling Fan Dell™ Latitude™ C400 Service Manual Removing the Cooling Fan Removing the Cooling Fan NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries.
5 . Remove the fan cable from the fan extender cable that runs under the system board. 6 . Remove the three M2.5 x 6 -mm screws that secure the cooling fan.
Back to Contents Page Reserve Battery Dell™ Latitude™ C400 Service Manual Removing the Reserve Battery Replacing the Reserve Battery Removing the Reserve Battery NOTICE: The reserve battery provides power to the computer's RTC and NVRAM when the computer is turned off.
1 reserve battery connector on system board 2 reserve battery cable 3 reserve battery 5 . Disconnect the reserve battery cable from the system board connector. 6 . Pry the reserve battery free from the system board. The reserve battery is attached to the system board with a piece of adhesive tape.
Back to Contents Page Flashing the BIOS Dell™ Latitude™ C400 Service Manual Perform the following steps to update the BIOS: 1 . Make sure that the AC adapter is plugged in and that the main battery is installed properly.
Back to Contents Page Audio Board Dell™ Latitude™ C400 Service Manual Removing the Audio Board Replacing the Audio Board Removing the Audio Board NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries.
1 M2 x 4 - mm screws (2) 2 audio board shield 3 audio board 5 . Remove the two M2 x 4 - mm screws from the audio board shield, and remove the shield. 6 . Pull the audio board up out of its connector. Replacing the Audio Board The audio board can be easily misaligned.
Back to Contents Page System Board Dell™ Latitude™ C400 Service Manual Removing the System Board Replacing the System Board Removing the System Board The system board's BIOS chip contains the service tag sequence, which is also visible on a barcode label on the bottom of the computer.
1 fan 2 reserve battery cable 3 connector for fan extender cable 4 hard - drive connector 5 M2 x 4 - mm screw (1) 6 memory module socket 7 guide pins (2) 8 5 -mm hex nuts (4) 9 7 -mm hex nuts (2) 10 . Remove the four 5- mm hex nuts near each end of the serial and video connectors.
After you have replaced the system board, insert the floppy disk or CD that accompanied the replacement system board into the appropriate drive, and turn on the computer.
Back to Contents Page Battery Latch Dell™ Latitude™ C400 Service Manual Removing the Battery Latch Replacing the Battery Latch Removing the Battery Latch NOTICE: Disconnect the computer and any attached devices from electrical outlets, and remove any installed batteries.
1 tension spring 2 bottom case 3 battery latch 4 battery release - button tabs NOTICE: The tabs on the release button are plastic. When squeezing the tabs, be careful not to break them.
Back to Contents Page Pin Assignments for I/O Connectors Dell™ Latitude™ C400 Service Manual Serial Connector USB Connector Docking Connector IDE Module Bay Connector Video Connector Serial Connec.
8 PD6 9 PD7 10 GND 11 DOCK_SPKR 12 DOCK_MIC 13 DOCK_LINE 14 DOCK_CDROM 15 GND 16 NC 17 POWER_SW# 18 QPCIEN# 19 S1.6M_EN# 20 DFDD/LPT# 21 GND 22 NC 23 NC 24 D_ACTLED 25 D_PWRLED 26 DOCK_PWR_SRC 27 DOCK.
48 DOCK_+DC_IN 49 GND 50 LOW_PWR 98 +5VSUS 99 NC 100 NC 148 NC 149 +5VALW 150 NC 198 NC 199 NC 200 GND Video Connector Pin Signal 1 RED 2 GREEN 3 BLUE 4 NC 5 GND 6 GND 7 GND 8 GND Pin Signal 9 CRT_VCC.
Pin Signal 1 BAY_MODPRES# 2 HDSEL# 3 RDATA# 4 WRPRT# 5 WRDATA# 6 INDEX# 7 DSKCHG# 8 1D6M_EN# 9 SIDE_IOW# 10 SIDED15 11 SIDED12 12 SIDED9 13 SIDE_CS3# 14 SIDE_CS1# 15 +5VMOD 16 IRQ15 17 +5VMOD 18 SIDED.
An important point after buying a device Dell C400 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Dell C400 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Dell C400 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Dell C400 you will learn all the available features of the product, as well as information on its operation. The information that you get Dell C400 will certainly help you make a decision on the purchase.
If you already are a holder of Dell C400, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Dell C400.
However, one of the most important roles played by the user manual is to help in solving problems with Dell C400. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Dell C400 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
