Cisco ASR-920-12SZ-IM Hardware Installation Manual page 84

Removing the DC Power Supply Module
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Warning
Statement 1030
Follow these steps to remove and replace the DC power supply:
SUMMARY STEPS
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.
2. Slip on the ESD-preventive wrist strap that was included in the accessory kit.
3. Switch the power supply circuit-breaker switch to the Off (O) position.
4. Pull the terminal block plug connector out of the terminal block head in the power supply. See the following
figure.
5. Loosen the captive screws on the DC power supply.
6. Grasp the power supply handle. Simultaneously press the power supply lock towards the left and pull the
power supply out from the chassis while supporting it with the other hand.
Cisco ASR-920-12SZ-IM Aggregation Services Router Hardware Installation Guide
72
Installing the Cisco ASR 920 Series Router