Dell PowerEdge R900 - Manual (Page 60)

60 Installing System Components
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.
NOTICE: For proper cooling and airflow, do not operate the server with the cover
removed for more than four minutes. Do not leave the chassis cover open or a
system fan removed any longer than necessary; system cooling could be reduced.
NOTICE: The server comes with a removable top cover that allows the system fans
to be hot-plugged and other system components to be serviced. Except for
components described in this chapter, all servicing must be done by a qualified
service technician.
NOTICE: Provide ElectroStatic Discharge (ESD) protection at all times by wearing
an antistatic wrist strap attached to the any unpainted chassis surface (chassis
ground) when handling electronic components.
Removing the Top Cover
To upgrade or troubleshoot the system, remove the system cover to gain
access to internal components.
1 Unless you are installing a hot-plug component such as a cooling fan or
power supply, remove power from the system and attached peripherals,
and disconnect the system from the electrical outlet and peripherals.
2 To remove the system cover, turn the latch release lock counter-clockwise
to the unlocked position. See Figure 3-2.
3 Lift the latch on top of the system. The cover will slide back as you lift the
latch. See Figure 3-2.
4 Grasp the cover on both sides and carefully lift the cover away from the
system.
Installing the Top Cover
1 Lift up the latch on the cover.
2 Place the cover on top of the system and offset the cover slightly back so
that it clears the chassis J hooks and lays flush on the system chassis. See
Figure 3-2.
3 Push down the latch to lever the cover into the closed position.
4 Rotate the latch release lock in a clockwise direction to secure the cover.