Cisco Systems Cisco 12816 Manuale Utente

Verify that the PWR OK indicator on each power supply is off.

Verify that the OK indicator on each blower module is off.

The chassis front covers for the power shelf and upper blower module, upper card 
cage, lower card cage, and lower blower module are fastened to the chassis by ball 
studs that insert into ball stud clips on the front of the chassis (

The partial front cover on the air filter door is fastened to the air filter door by four 
screws inserted from the back side of the air filter door. This partial front cover is 
referred to as the air filter door front cover.

Recently released routers have bezel extenders installed on the front covers 
(bezels) for the upper and lower card cages to bring the covers out an additional 
2 inches (50.8 mm) to allow more room for cables. If your chassis does not have 
these extenders and you want to purchase them, contact Cisco sales. (See the 

 if you are 

installing the bezel extenders.)

The front covers are held in place by ball studs that snap into clips on the chassis. 
Refer to 

 and use the following procedure to remove the snap-on front 

covers.

Grasp the outside edges of the upper blower module front cover and pull it straight 
out to detach the front cover from the chassis.

Repeat Step 1 for the remaining front covers.