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58 SPARC Enterprise T5140 and T5240 Servers Service Manual • July 2009
Caution – There is a risk of personal injury or equipment damage. To avoid
personal injury and equipment damage, follow the instructions.
Caution – Hot surface. Avoid contact. Surfaces are hot and might cause personal
injury if touched.
Caution – Hazardous voltages are present. To reduce the risk of electric shock and
danger to personal health, follow the instructions.
Electrostatic Discharge Safety Measures
Electrostatic discharge (ESD) sensitive devices, such as the motherboards, PCI cards,
hard drives, and memory cards require special handling.
Caution – Circuit boards and hard drives contain electronic components that are
extremely sensitive to static electricity. Ordinary amounts of static electricity from
clothing or the work environment can destroy the components located on these
boards. Do not touch the components along their connector edges.
Caution – You must disconnect both power supplies before servicing any of the
components documented in this chapter.
Antistatic Wrist Strap Use
Wear an antistatic wrist strap and use an antistatic mat when handling components
such as hard drive assemblies, circuit boards, or PCI cards. When servicing or
removing server components, attach an antistatic strap to your wrist and then to a
metal area on the chassis. Following this practice equalizes the electrical potentials
between you and the server.
Note – An antistatic wrist strap is no longer included in the accessory kit for the
SPARC Enterprise T5140 and T5240 servers. However, antistatic wrist straps are still
included with options.