Cisco 7000 Series Hardware Installation And Maintenance page 213

Internal
Components
Replacing
Chassis Blower
the
Replacing
The
chassis
through
The
absence
overtemperature
Caution
An
overtemperature
The blower
of the
rear
The blower
in Figure
Warning
cord Use extreme
system
Figure
7000 Hardware
5-68 Cisco
blower draws
air
cooling
the of the inner rear
floor
compartment
of cooling
air can
cause
condition
the
Never
system
operate
result
condition can
bottom
located the
is at
shown shaded
blower
in
secured the backplane
is to
5-26
Before the chassis interior turn off the
accessing
when
caution working
operating
is
Chassis Blower
5-26
Allen-head
Captive
and Maintenance
Installation
bottom
in through the chassis
RP
SP
cool the
to
the of the chassis
interior to
blower
the not functioning
if is
in severe
damage
equipment
See
of the chassis interior
Figure
the
into
fit snugly
illustration
with three large captive Allen-head
power
the
near backplane high voltage
screws
and
front panel sends
it up
SSP
and
interface
or
processors
and
heat may cause an
up
one not installed
or if is
properly
5-24 Two
on
ducts
air
the cutouts in the
two backplane
which shown
screws are
the
and unplug
switch power
when
the
is present
the