Remove The Ac Power Supply - Cisco ASR-920-20SZ-M Hardware Installation Manual

Replace the Power Supply
Step 3
Verify that power to the DC circuit connected to the power supply you are installing is off. To ensure that
power has been removed from the DC circuits, locate the circuit breakers for the DC circuits, switch the circuit
breakers to the OFF position, and tape the circuit-breaker switches in the OFF position.
Step 4
Grasp the power supply metal tab with one hand. Place your other hand underneath the power supply. Slide
the power supply into the power supply bay as shown in the figure below. Make sure that the power supply
is fully seated in the bay.
Figure 29: Install the DC Power Supply
Step 5 Tighten the captive installation screw of the power supply. The recommended maximum torque is 5.5
inch-pounds (.62 newton meters).
If you are installing a redundant DC power supply, repeat these steps for the second power source too.

Remove the AC Power Supply

Procedure
Step 1
Disconnect the power cord from the power source. Do not touch the metal prongs on the power cord when it
is still connected to the power supply.
Step 2
Remove the power cord from the power connection on the power supply. Do not touch the metal prongs
embedded in the power supply.
Step 3 Loosen the captive installation screw as shown in the figure below.
Cisco ASR-920-20SZ-M Aggregation Services Router Hardware Installation Guide
Remove the AC Power Supply
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