Cisco 3000 Series

Opening
the Chassis
Removing
the Chassis Cover
Warning
Hazardous
voltages
may
exist in
or near
the
power
supply
so
use
extreme caution when
working near
the
power
supply
Before
starting any
of these
procedures
turn OFF
power
to the
71
system
unplug
the
power
cord
disconnect
any
cables at the
ports
and connect ESD
protection
To
remove
the chassis
cover
follow these
steps
Step
Turn OFF the unit and
unplug
it
Step
Attach ESD
protection
Step
Remove all cables from the back of the router
including
the
power
cable
to
ensure
that the
unit is
not
powered
on
and
to ensure
that the
cover
will not
get caught
on
the cables
Caution Avoid
damaging
any
cables
as
you
remove
the
cover
Step
Turn
the unit
up
so that
the
back of the
chassis is
resting
on surface
and the underside of
the
chassis is
facing
you
taking
care not to
damage
the network
connectors
Step
Remove the latch screw
shown
in
Figure 5-1
behind the latch
on
the
right
side of the
underside of the chassis The latch will not
open
until this
screw
is removed
Step
Put the unit back down with the LEDs
facing
you
Place
your
fingers
inside the
two
front
latches on the underside of the chassis
see Figure 5-1
and
push
the latches back until
they
snap open
Step
Lift the chassis
cover
from the front
edge
where the LEDs are located
The chassis
cover
will tilt
up
from the front toward the back If
you
feel excessive resistance
when
opening
the
unit one
of the latches
might
still be closed Push back on the latches
again
Step
Remove the
ground
wire
green
with
yellow stripes
connecting
the left
hinge post
on
the
cover
with the main
ground
stud as
shown in
Figure
5-2 The
ground
wire
is
attached to
the main
ground
stud with FASTON
lug
so
the wire
can
be
slipped
off
easily
Maintenance 53