Handling Electrostatic Discharge-Sensitive Devices - IBM Brocade 4 Gb SAN Switch Module Installation Manual

• Do not work alone under hazardous conditions, or near equipment that has hazardous voltages.
• Disconnect all power before:
— Performing a mechanical inspection
— Working near power supplies
— Removing or installing main units
• Before you start to work on the machine, unplug the power cord. If you cannot unplug it, ask the
customer to power-off the wall box (that supplies power to the machine) and to lock the wall box
in the off position.
• If you need to work on a machine that has exposed electrical circuits, observe the following
precautions:
— Ensure that another person, familiar with the power-off controls, is near you. Remember: another
person must be there to switch off the power, if necessary.
— Use only one hand when working with powered-on electrical equipment; keep the other hand in your
pocket or behind your back.
— Remember: There must be a complete circuit to cause electrical shock. By observing the above rule,
you may prevent a current from passing through your body.
• When using testers, set controls correctly and use the approved probe leads and accessories for
that tester.
• Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such
as metal floor strips and machine frames.
• Observe the special safety precautions when you work with very high voltages; these
instructions are in the safety sections of the maintenance information. Use extreme care when
measuring high voltages.
• Regularly inspect and maintain your electrical hand tools for safe operational condition.
• Do not use worn or broken tools and testers.
• Never assume that power has been disconnected from a circuit. First, check that it has been
powered-off.
• Always look carefully for possible hazards in your work area. Examples of these hazards are
moist floors, nongrounded power extension cables, power surges, and missing safety grounds.
• Do not touch live electrical circuits with the reflective surface of a plastic dental inspection
mirror. The surface is conductive; such touching can cause personal injury and machine damage.
• When the power is on and power supply units, blowers and fans are removed from their normal
operating position in a machine, do not attempt to service the servers. This practice ensures
correct grounding of the servers.
• If an electrical accident occurs, use caution:
— Switch power off
— Send another person to get help/medical aid

Handling electrostatic discharge-sensitive devices

Any computer part containing transistors or integrated circuits (IC) should be considered sensitive to
electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects.
Protect against ESD damage by equalizing the charge so that the server, the part, the work mat, and the person
handling the part are all at the same charge.
Note: Use product-specific ESD procedures when they exceed the requirements noted here.
Make sure that the ESD-protective devices you use have been certified (ISO 9000) as fully effective.
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