Cisco ASR 1000 Series Replacing page 72

Removing the AC Power Supply from Cisco ASR 1004 Router
2
3
*For information about the DB-25 alarm connector, how
it works, and Cisco ASR 1000 route processor LEDs,
see the xref "How Cisco ASR1000-RP Alarm
Monitoring Works" section on page 2-20.
Note: Shielded cables must be used to connect to the
DB-25 alarm connector on both the AC and DC power
supplies, in order to comply with
FCC/EN55022/CISPR22 Class A emissions
requirements.
Following these steps to remove an AC power supply from the Cisco ASR 1004 Router.
SUMMARY STEPS
1. Slip on the ESD-preventive wrist strap that was included in the accessory kit.
2. Before you turn off a power supply, make certain the chassis is grounded.
3. Turn the power supply Standby switch to the Standby position.
4. Unplug the power cable from the AC inlet on the back of the power supply and the power source.
5. Unscrew the four power supply captive screws and grasp the handles on both sides of the power supply.
6. Grasping the power supply handles, pull the power supply from the chassis.
7. Replace the AC power supply within five minutes.
DETAILED STEPS
Step 1
Slip on the ESD-preventive wrist strap that was included in the accessory kit.
Step 2 Before you turn off a power supply, make certain the chassis is grounded.
Step 3
Turn the power supply Standby switch to the Standby position.
Step 4 Unplug the power cable from the AC inlet on the back of the power supply and the power source.
Step 5
Unscrew the four power supply captive screws and grasp the handles on both sides of the power supply.
Note Four power supplies must be installed in the chassis at all times, with a minimum of two power supplies (one
per zone) connected to the mains in order to power on the system and ensure sufficient cooling. The system
fans are inside the power supply units and must spin for cooling. Because all the system fans can be powered
by one power supply, the second power supply unit does not have to be powered on, but must be connected.
If you remove a power supply from a system that has four power supplies that are connected and powered on,
Caution
the system can run only for a maximum of five minutes before shutting down. However, because the fans and
power elements are independent within the power supply, the replacement power supply does not have to be
energized within five minutes. The only requirement is that the power supply be installed in the chassis in order
to energize the fans and maintain proper system cooling.
Step 6
Grasping the power supply handles, pull the power supply from the chassis.
Removing and Replacing FRUs from the Cisco ASR 1000 Series Routers
72
Removing and Replacing FRUs from the Cisco ASR 1000 Series Routers
AC power supply LEDs
DB-25 alarm connector*
5 AC power inlet
6 AC power supply
handle