Cisco 12012 Replacement Instructions Manual page 10

Gigabit switch router card cage assembly

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Removing and Replacing a Card Cage Assembly

Removing a DC-Input Power Supply

Perform the following steps to remove a DC-input power supply:

Caution

DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services

the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the

circuit breaker in the OFF position.

Step 1

Step 2

Warning

source circuit breaker and remove the power supply before accessing the terminals.

Step 3

Step 4

Step 5

10 Cisco 12012 Gigabit Switch Router Card Cage Assembly Replacement Instructions

Before performing any of the following procedure, ensure that power is removed from the

Attach an antistatic wrist strap to yourself and to one of the two ESD connection sockets

located on the front edges of the upper card cage or to bare metal on the frame.

If you have not already done so, turn OFF (O) the power switch on the DC-input power

supply.

Voltages might be present on the DC-input power supply terminals. Turn off the power

Turning the power supply switch to OFF (O) releases a latch that secures the power

Note

supply in the power supply bay.

Locate and turn off the source DC circuit breaker that services the power supply you want

to remove. As an added precaution, tape the circuit breaker handle in the off position.

Using a flat-blade screwdriver or a 10-mm nutdriver, turn the captive jackscrew

counterclockwise (eject) on the power supply faceplate to unseat the power supply from

the backplane power connector. Continue turning the jackscrew to disengage the

jackscrew from the power supply bay (approximately 12 revolutions).

Grasp the power supply handle and slide the power supply halfway out of the bay. (Refer

to Figure 4.)

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