NEC HX4500, User Manual, Page: 76 / 160

Upgrading Your System 4-5
!
CAUTION
Electrostatic discharge (ESD) and ESD protection. ESD can
damage disk drives, boards, and other parts. This system can
withstand normal levels of environmental ESD while you are hot-
swapping SCSI hard drives or hot-swapping a failed fan module or
power supply. However, we recommend that you do all procedures
in this chapter only at an ESD workstation. If one is not available,
provide some ESD protection by wearing an antistatic wrist strap
attached to chassis ground (any unpainted metal surface) on your
system when handling parts.
ESD and handling boards. Always handle boards carefully. They
can be extremely sensitive to ESD. Hold boards only by their edges.
After removing a board from its protective wrapper or from the
system, place it component-side up on a grounded, static-free
surface. Use a conductive foam pad if available but not the board
wrapper. Do not slide board over any surface.
Chassis covers, proper cooling and airflow. For proper cooling
and airflow, always install the chassis side and top covers before
turning on the system. Operating it without these covers in place can
damage system parts.
Contact your sales representative or dealer for a list of approved optional peripheral
devices.