Dell PowerEdge 1900 - Manual (Page 80)

80
Installing System Components
Removing the Back Fan Bracket
CAUTION:
Only trained service technicians are authorized to remove the system cover and access any of the
components inside the system. See your Product Information Guide for complete information about safety
precautions, working inside the computer, and protecting against electrostatic discharge.
1 Turn off the system, including any attached peripherals, and disconnect the system from the electrical
outlet.
2 Open the system. See "Opening the System" on page 48.
3 Remove the memory cooling shroud. See "Removing the Cooling Shroud" on page 77.
4 Remove the fans from the back fan bracket. See "Removing and Installing a Fan" on page 53.
5 To remove the back fan bracket, push down on the blue latch along the rear chassis wall and slide
the bracket upwards. See Figure 3-19.
Replacing the Back Fan Bracket
1 Slide the left and right edges of the bracket into the two corresponding channels on the inside of
the system chassis back panel. See Figure 3-19.
2 Lower the bracket into the system until the two tabs on the top edge of the bracket fit into the slots in
the system back panel.
3 Replace the memory cooling shroud. See "Installing the Cooling Shroud" on page 79.
NOTICE:
Never operate your system with the memory cooling shroud removed. Overheating of the system can
develop quickly resulting in a shutdown of the system and the loss of data.
4 Replace the fans into the fan bracket. See "Removing and Installing a Fan" on page 53.
5 Close the system. See "Closing the System" on page 48.
6 Reconnect the system to the electrical outlet and turn on the system and attached peripherals.
Memory
You can upgrade your system memory to a maximum of 16 GB by installing 533MHz or, when available,
667MHz fully buffered DIMMs (FBDs) in dual sets of 256-MB, 512-MB, 1-GB, or 2-GB. The memory
sockets are located on the system board beneath the cooling shroud. See Figure 6-2.
NOTICE:
If you remove your original memory modules from the system during a memory upgrade, keep them
separate from any new memory modules that you may have. Use only 533 MHz or, when available, 667 MHz FBDs.
The memory module sockets are arranged on the system board in two equal branches (0 and 1). See
Figure 3-20. Each branch consists of two channels:
• Channel 0 and channel 1 are in branch 0.
• Channel 2 and channel 3 are in branch 1.