Safety Guidelines - Cisco 7000 Replacement Instructions Manual

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.
•
You can remove the bottom front chassis panel and replace the air filter while the system is
operating, but you must turn all power supplies off and disconnect power cords before removing
the top front chassis panel to access the chassis interior. Dangerous current levels are present on
the backplane when power is on.
•
Do not work alone when potentially hazardous conditions exist.
•
Carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.
•
Before beginning any procedures requiring access to the chassis interior, locate the emergency
power-off switch for the room in which you are working.
•
Never assume that power has been disconnected from a circuit; always check.
In addition, use the following guidelines when working with any equipment that is connected to
telephone wiring or other network cabling.
•
Never install telephone wiring during a lightning storm.
Warning
activity. (For translations of this safety warning, refer to the section "Lightning Activity Warning on
page 15.)
•
Never install telephone jacks in wet locations unless the jack is specifically designed for wet
locations.
•
Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
•
Use caution when installing or modifying telephone lines.
Warning
with telephone-network voltages. (For translations of this safety warning, refer to the section
"Chassis Warning—Disconnecting Telephone-Network Cables on page 15.)
List of Parts and Tools
You need the following tools to clean or replace the air filter, and to replace the blower:
•
To clean the air filter, you need a small hand vacuum.
•
To remove and wash the filter, or to replace it with a new filter, you might need a small (3/16-inch)
flat-blade screwdriver to push the edges of the filter back into the frame of the top front panel.
•
To replace the system blower, you need the following tools:
— To remove the top front chassis panel, you need a medium (Number 2 Phillips or 3/16-inch
Do not work on the system or connect or disconnect cables during periods of lightning
Before opening the chassis, disconnect the telephone-network cables to avoid contact
flat-blade) screwdriver. Earlier chassis (the first several hundred shipped) used slotted
screws, and later chassis used Phillips screws to secure the top front panel to the chassis. No
tools are required to remove the bottom front chassis panel.
Cisco 7000 and Cisco 7507 Air Filter and Chassis Blower Replacement Instructions
Prerequisites
5