iv
Important safety information and precautions
Caution. Use
Use proper safety and repair techniques for safe, reliable operation of this unit. Service should be done only by qualified persons. We recommend the proce- dures 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 read and followed to minimize or eliminate the risk of personal injury. The warnings point out conditions or practices that may endanger you or others. The cautions point out conditions or practices that may damage the unit, possibly making it unsafe for use.
You must also understand that these warnings and cautions are not exhaustive. We cannot possibly know, evaluate, and advise you of all the ways in which maintenance might be performed or the possible risk of each technique. Consequently, we have not completed any such broad evaluation. If you use a
Always observe the following warnings and precautions:
•Perform all maintenance by following the procedures in this manual.
•Follow all cautions and warnings in the procedures.
•Use sound safety practices when operating or repairing the unit.
•Use caution when troubleshooting a unit that has voltages present. Turn off power to the unit before servicing it.
•Wear safety shoes when removing or replacing heavy parts.
•Provide a means to isolate the drive from the main power in case of fire or other emergency.
•Ensure that the internal temperature of the rack or cabinet does not exceed the limits defined for the drive, when the drive is mounted in an equipment rack or cabinet. When units are stacked vertically, pay special attention to the top where temperatures are usually highest.
•Follow the precautions listed above in “Electrostatic discharge protection.”
•Do not remove any circuit boards from the drive chassis. Return the entire drive for depot repair if any circuit board is defective. Removal of circuit boards by personnel not performing depot repair will damage components and may void the warranty.