Cisco 10720 - Internet Router Installation And Configuration Manual page 140

Removing and Installing the Router Fan Assembly
There are four fans and four separate connectors on the main board. Fan Number 1 is located farthest
away from the power supply. Fan Number 4 is located closest to the power supply and must have a guard
attached at all times. (See
Figure 5-19
a
b
Step 4 Disconnect the 4-jack harness (main power supply unit output cable) from the main board and move it
behind the power supply unit in order to access Fan Number 4. (See
Cisco 10720 Internet Router Installation and Configuration Guide
5-18
Figure
Disconnecting the Power Supply Unit From the Main Board
4-jack harness
6-pin connector
Chapter 5
5-18.)
a
c 2-pin +/–12V connector
Maintaining the Cisco 10720 Internet Router
c
b
Figure 5-19.)
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