v Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners foryour clothing.Remember: Metal objects are good electrical conductors.v Wear safety glasses when you are: hammering, drilling soldering, cuttingwire, attaching springs, using solvents, or working in any other conditionsthat might be hazardous to your eyes.v After service, reinstall all safety shields, guards, labels, and ground wires.Replace any safety device that is worn or defective.v Reinstall all covers correctly before returning the machine to the customer.Electrical safetyCAUTION:Electrical current from power, telephone, and communication cables can behazardous. To avoid personal injury or equipment damage, disconnect theattached power cords, telecommunication systems, networks, and modemsbefore you open the server covers, unless instructed otherwise in theinstallation and configuration procedures.Observe the following rules when working on electrical equipment.Important: Use only approved tools and test equipment. Some hand toolshave handles covered with a soft material that does not insulateyou when working with live electrical currents.Many customers have, near their equipment, rubber floor matsthat contain small conductive fibers to decrease electrostaticdischarges. Do not use this type of mat to protect yourself fromelectrical shock.v Find the room emergency power-off (EPO) switch, disconnecting switch, orelectrical outlet. If an electrical accident occurs, you can then operate theswitch or unplug the power cord quickly.v Do not work alone under hazardous conditions or near equipment that hashazardous voltages.v Disconnect all power before:– Performing a mechanical inspection– Working near power supplies– Removing or installing main unitsv Before you start to work on the machine, unplug the power cord. If youcannot unplug it, ask the customer to power-off the wall box that suppliespower to the machine and to lock the wall box in the off position.186 Hardware Maintenance Manual: IBM NetVista Computer Types 6058, 6059, 6269, 6568, 6569, 6578, 6579, 6648,6649
