1200-Watt DC-Input Power Supply Replacement Instructions 7
Installation Safety, ESD Precautions, and Tools Required
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) damage, which can occur when electronic boards or components are
handled improperly, can result in complete or intermittent failures.
Following are guidelines for preventing ESD damage:
•
Always use an ESD-preventive wrist strap or ankle strap and ensure that it makes good skin
contact.
•
When removing or installing a power supply, connect the equipment end of a ground strap to the
chassis ground screw on the interface processor end of the chassis, or to an unpainted surface
inside the noninterface processor end of the chassis, such as the chassis frame.
•
If you plan to return a replaced part to the factory, immediately place it in a static shielding bag
to avoid ESD damage to the board.
•
The wrist strap only protects the board from ESD voltages on the body; ESD voltages on clothing
can still cause damage.
Note
Periodically check the resistance value of the antistatic strap. The measurement should be
between 1 and 10 megohms.
Tools Required
You need the following tools to install or replace a power supply:
•
A 1/4-inch flat-blade and Number 2 Phillips screwdriver.
•
Small, wire cutter.
•
Appropriate length and diameter of conduit through which the DC-input cable will pass. The
opening on the terminal block cover is one inch in diameter. Installation of this conduit depends
on your site and is beyond the scope of this publication.
•
If the chassis is mounted in an equipment rack, and cables from other equipment fall in front of
the power supply bays, you will need cable ties to temporarily anchor the cables out of the way.
•
If access to the power supply bays is partially blocked by a power strip or other permanent rack
fixture, you will need a 1/4-inch flat-blade screwdriver to temporarily detach the ears from the
equipment rack mounting strips.
•
ESD-preventive wrist strap.
Before beginning the power supply installation, check the installation screws on all power supplies
and check the area around the power supply bays to determine which tools you will need. The new
or replacement power supply and the power cable that you supply are the only parts you need to
complete this installation. If you remove a power supply and leave the bay empty, install a cover
plate over the empty bay. The chassis is shipped with a cover plate installed over the empty bay.
