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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
Warning
Installation of the equipment must comply with local and national electrical codes.
Statement 1074
Follow these steps to remove and replace the DC power supply on the Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router:
Step 1 Before servicing the power supply, switch off the circuit breaker in your equipment area. As an
additional precaution, tape the circuit-breaker switch in the Off position.
Step 2 Slip on the ESD-preventive wrist strap that was included in the accessory kit.
Step 3 Switch the power supply circuit-breaker switch to the Off (O) position.
Step 4 Pull the terminal block plug connector out of the terminal block head in the power supply.
Step 5 Loosen the captive screw on the DC power supply. See Figure 3-23.
Figure 3-23 Removing a DC Power Supply
Caution Do not use the captive installation screw to pull out the power supply.
Step 6 Grasping the power supply handle with one hand, pull the power supply out from the chassis while
supporting it with the other hand.
Step 7 Replace the DC power supply within 5 minutes. See Figure 3-20. If the power supply bay is to remain
empty, install a blank filler plate (Cisco part number 800-39165-01) over the opening, and secure it with
captive installation screws.
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