Prerequisites
Safety Guidelines
The following guidelines will help to ensure your safety and protect the equipment. This list is not inclusive of all potentially hazardous situations, so be alert.
Warning Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord. (For translations of this safety warning, refer to the section “Power Disconnection Warning” on page 36.)
Warning Do not touch the power supply when the power cord is connected. For systems with a power switch, line voltages are present within the power supply even when the power switch is off and the power cord is connected. For systems without a power switch, line voltages are present within the power supply when the power cord is connected. (For translations of this safety warning, refer to the section “Power Supply Warning” on page 36.)
Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. (For translations of this safety warning, refer to the section “Power Supply Disconnection Warning” on page 37.)
Warning This unit might have more than one power cord. To reduce the risk of electric shock, disconnect the two power supply cords before servicing the unit. (For translations of this safety warning, refer to the section “Electric Shock Warning” on page 38.)
•Never try to lift the chassis by yourself; two people are required to lift the chassis.
•Use a hand truck or pallet jack to move the chassis between locations.
•Always disconnect all power cords and interface cables before moving the chassis.
•Keep tools and chassis components away from walk areas.
•Do not work alone when potentially hazardous conditions exist.
•Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.
•Carefully examine your work area for possible hazards such as moist floors, ungrounded power extension cables, and missing safety grounds.
Cisco 7000 and Cisco 7507 Chassis Replacement Instructions 7