Cisco 12012 Replacement Instructions Manual page 17

To gain access to the lower card cage, loosen the two captive screws at the top of the air
Step 2
filter tray and pivot the tray down, away from the lower card cage. (Refer to Figure 9.)
Figure 9 Opening the Air Filter Tray
Air deflector
Honeycomb
screen
Captive Air filter
screw tray
To prevent damage, do not place any tools on the air filter tray or in the lower card cage.
Caution
Damaging the honeycomb screen on the air filter tray or in the lower card cage could restrict the air
flow causing an overtemperature condition in the Cisco 12012.
Cisco 12012 Gigabit Switch Router Card Cage Assembly Replacement Instructions
Removing and Replacing a Card Cage Assembly
Air filter Captive
screw
17