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2 ST11950 and ST12550 Installation Guide, Rev. D
• Ground yourself to the drive whenever the drive elec-
tronics are or will be exposed. Connect yourself to
ground with a wrist strap (Seagate part number
12263496). Connection may be made to any grounded
metal assembly. As a general rule, remember that you
and the drive electronics must all be grounded to avoid
potentially damaging static discharges.
• Turn off the power before removing or installing the DC
power cable.
• Do not remove any circuit boards from the drive.
• Never use an ohmmeter on any circuit boards.
Important safety information and precautions
Caution. Use forced-air ventilation when bench-testing
the drive to ensure proper cooling of drive
components.
Use proper safety and repair techniques for safe, reliable
operation of this unit. Service should be done only by
qualified persons. We recommend the procedures in this
manual as effective ways of servicing the unit. Some
procedures require the use of special tools. For proper
maintenance and safety, you must use these tools as
recommended.
The procedures in this manual and labels on the unit
contain warnings and cautions that must be carefully