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Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
Chapter 3 Installing
Installing the Power Supply
Caution To avoid erroneous failure messages, allow at least 2 minutes for the system to reinitialize after a power
supply has been removed or replaced.
Warning
When you install the unit, the ground connection must always be made first and disconnected last.
Statement 1046
Warning
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
Warning
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
Warning
Installation of the equipment must comply with local and national electrical codes.
Statement 1074
Follow these steps to remove and replace an AC power supply:
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.