Cisco 12012 - Manual (Page 7)

Cisco 12012 Gigabit Switch Router Card Cage Assembly Replacement Instructions 7
Removing and Replacing a Card Cage Assembly
Removing and Replacing a Card Cage Assembly
This section covers removing and replacing of the card cage assembly. The card cage assembly
comprises a single assembly that includes the upper card cage, the lower card cage, and the power
supply bays. The assembly slides into and out of the frame and attaches to the frame with six captive
screws. An empty card cage assembly weighs 65 lb (29.5 kg). The inside dimensions of the card cage
are:
Width = 15 9/16"
Height = 14 9/16"
Depth = 17 9/16"
The replacement card cage assembly is shipped with only a new air filter; you must remove the
following components from the old card cage assembly:
•
Line cards
•
route processor (RP)
•
Clock and scheduler cards, and switch fabric cards
•
Alarm card
•
Any installed card blanks
•
Power supplies and power supply blanks
Store them carefully while you install the new card cage assembly in the frame, then replace the
components in the new card cage assembly.
Powering Down the Cisco 12012
Perform the following steps to power down the Cisco 12012:
Step 1 Turn the DC-input power supply power switch to the OFF (O) position (on AC-input
power supplies, turn the power switch counterclockwise to the STANDBY position) on
all power supplies installed in the Cisco 12012.
Step 2 Verify that the system has powered down by checking that the LEDs on the power
supplies are off and the green LEDs on both blower modules are off.
Warning This unit has more than one power supply connection; all connections must be removed
completely to completely remove power from the unit.
Removing a Power Supply
This section provides procedures for removing an AC-input power supply and a DC-input power
supply. Select the procedure appropriate for your system.
Caution Always wear an antistatic wrist strap to prevent ESD when removing and replacing a
power supply.