Safety Guidelines - Cisco 7000 Manual

Prerequisites

Safety Guidelines

Cisco 7000 Front Chassis Panel and LED Board and Replacement 5
LED board
LEDs
Figure 4 LED Board
Before you begin an installation, review the safety guidelines in this section to avoid
injuring yourself or damaging the equipment.
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.
Always turn all power supplies OFF and disconnect power cords before removing
the top front chassis panel. 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 guidelines that follow when working with any equipment that is
connected to telephone wiring or other network cabling.
Never install telephone wiring during a lightening storm.
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.
LED board
spring
Board locking
pin
Backplane connector
LED board
brackets