IBM 4247-003 Maintenance Manual - Page 13
Electrical Safety, Electrical Safety for IBM Customer Engineers, exposed
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Electrical Safety For a detailed description of electrical safety, refer to Electrical Safety for IBM Customer Engineers, S229-8124. Observe the following rules when working on electrical equipment: v Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you then can operate the switch or unplug the power cord quickly. v Do not work alone under hazardous conditions or near equipment that has hazardous voltages. v Disconnect all power before: - Performing a mechanical inspection - Working near power supplies - Removing or installing main units v 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 (O) position. v 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: If conditions require a second person, that person must be present when you power off (O) the printer. DANGER Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Use only approved tools and testers. - Use only one hand when working with powered-on electrical equipment; keep the other hand in your pocket or behind your back. Safety Information 13