IBM 2027-R04, Installation And Service Manual

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11 Chapter 1: Overview
ATTENTION!
All maintenance and servicing must be performed only by
trained personnel under the direct supervision of an authorized
representative.
ATTENTION!
It is important to discharge any electrostatic buildup to bring
you and the chassis to the same potential! Take the following precautions:
Use an electrostatic discharge (ESD) wrist strap connected to the
chassis or the same earth ground as the cabinet.
• Connect the chassis to the earth ground using a portable ESD
work surface or another path to earth ground.
• Keep static-sensitive components in protective packaging until
you are ready to connect them.
• Avoid touching electronic components or modules by their leads,
connectors or other contact points.