Seagate ST43401N/ND, ST43402ND user manual Preface, Electrostatic discharge protection

ST43401N/ND, ST43402ND User’s Manual, Rev. B iii

Preface

This manual contains information for users of Seagate® ST43401N/ND and ST43402ND Elite™ disc drives. It provides instructions to all personnel who operate the drive and to customer engineers who install and check out the drive. Additional information is available in the reference manual (publication 83327730).

Electrostatic discharge protection

Caution. Removal of circuit boards by personnel not performing depot repair will damage components and may void the warranty.

All drive electronic assemblies are sensitive to static electricity due to the electrostatically sensitive devices used within the drive circuitry. Although some devices such as metal-oxide semiconductors are extremely sensitive, all semiconductors, as well as some resistors and capacitors, may be damaged or degraded by exposure to static electricity.

Electrostatic damage to electronic devices may be caused by the direct discharge of a charged conductor, or by exposure to the static fields surround- ing charged objects. To avoid damaging drive electronic assemblies, service personnel must observe the following precautions when servicing the drive:

•Ground yourself to the drive whenever the drive electronics 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 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.