Cisco 7500 Series Configuration Manual page 214

Maintenance Procedures for the Cisco 7507 and Cisco 7507-MX
Figure 6-11
Before working on a chassis or working near power supplies, unplug the power cord on AC units;
Warning
disconnect the power at the circuit breaker on DC units.
Use the following procedure to remove the existing chassis blower:
On each installed power supply, turn off the power switch and unplug the power cable from the power
Step 1
source.
Step 2 Remove the front panels. (See Step 1 through Step 6 in the procedure for removing front cover panels in
the "Removing and Replacing the Cisco 7507 and Cisco 7507-MX Front Chassis Panels" section on
page 6-6.)
Step 3 Locate the blower (see
blower power connector, which is connected to a port in the backplane under the white power bar. Note
the orientation of the power connector and its orientation in the backplane port.
Cisco 7500 Series Installation and Configuration Guide
6-16
Chassis Blower (Cisco 7507 and Cisco 7507-MX)
Blower power
connection
Purple (+24V) Black (ground)
Captive Allen-head screws
Figure 6-8), which is mounted to the bottom of the backplane. Also, locate the
Chapter 6 Maintaining Your Cisco 7507 and Cisco 7507-MX Router
Blower
OL-5008-03 B0