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v Regularly inspect and maintain your electrical hand tools for safe operational condition. Do not use
worn or broken tools or testers.
v Do not touch the reflective surface of a dental mirror to a live electrical circuit. The surface is
conductive and can cause personal injury or equipment damage if it touches a live electrical circuit.
v Some rubber floor mats contain small conductive fibers to decrease electrostatic discharge. Do not use
this type of mat to protect yourself from electrical shock.
v Do not work alone under hazardous conditions or near equipment that has hazardous voltages.
v Locate the emergency power-off (EPO) switch, disconnecting switch, or electrical outlet so that you can
turn off the power quickly in the event of an electrical accident.
v Disconnect all power before you perform a mechanical inspection, work near power supplies, or
remove or install main units.
v Before you work on the equipment, disconnect the power cord. If you cannot disconnect the power
cord, have the customer power-off the wall box that supplies power to the equipment and lock the
wall box in the off position.
v Never assume that power has been disconnected from a circuit. Check it to make sure that it has been
disconnected.
v If you have to work on equipment that has exposed electrical circuits, observe the following
precautions:
– Make sure that another person who is familiar with the power-off controls is near you and is
available to turn off the power if necessary.
– When you are working with powered-on electrical equipment, use only one hand. Keep the other
hand in your pocket or behind your back to avoid creating a complete circuit that could cause an
electrical shock.
– When you use a tester, set the controls correctly and use the approved probe leads and accessories
for that tester.
– Stand on a suitable rubber mat to insulate you from grounds such as metal floor strips and
equipment frames.
v Use extreme care when you measure high voltages.
v To ensure proper grounding of components such as power supplies, pumps, blowers, fans, and motor
generators, do not service these components outside of their normal operating locations.
v If an electrical accident occurs, use caution, turn off the power, and send another person to get medical
aid.
Working inside the server with the power on
Attention: Static electricity that is released to internal server components when the server is powered-on
might cause the server to halt, which might result in the loss of data. To avoid this potential problem,
always use an electrostatic-discharge wrist strap or other grounding system when working inside the
server with the power on.
You might have to have the server turned on while the cover is off, to look at LEDs or replace hot swap
components. Follow these guidelines when you work inside a server that is turned on:
v Avoid wearing loose-fitting clothing on your forearms. Button long-sleeved shirts before you work
inside the server; do not wear cuff links while you are working inside the server.
v Do not allow your necktie or scarf to hang inside the server.
v Remove jewelry, such as bracelets, necklaces, rings, and loose-fitting wrist watches.
v Remove items from your shirt pocket, such as pens and pencils, that might fall into the server as you
lean over it.
v Avoid dropping any metallic objects, such as paper clips, hairpins, and screws, into the server.
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ThinkServer TS200 Types 6522, 6523, 6524, 6525, 6526, 6528, 6529, and 6530: Hardware Maintenance Manual
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