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Chapter 6
Install and Upgrade Internal Modules and FRUs
Remove DC Input Power from Cisco 4431 ISR
This section describes how to remove a DC power supply from Cisco 4431 Series ISR.
Note
The Cisco 4431 ISR has redundant power supplies that can be hot-swapped.
To remove a DC power supply from Cisco 4431 ISR:
Step 1
If you have redundant power supplies, ensure that the power switch is in the Standby position.
Note
Step 2
For Cisco 4431 ISR, unscrew the two terminal block wire connectors (negative and positive) on the unit.
See. See
the three terminal block wire connectors (ground, negative and positive) on the unit. For Cisco 4331 ISR,
remove the power supply cable connector (See
power supply module to the chassis.
Step 3
Remove the plastic bezel from the router. You can skip this step for Cisco 4451 ISR and Cisco 4351 ISR.
Step 4
Press the retaining latch towards the pull handle, grasp the handle with one hand, and pull the power
supply out of the slot while supporting the weight of the power supply with the other hand. See
Figure
Figure 6-32
1
OL-32185-02
It is not required to place the power switch in the Standby position if you want to hot-swap a
single power supply.
Figure
6-35. Cisco 4451 ISR and Cisco 4351 ISR: For Cisco 4451 ISR and Cisco 4351, unscrew
6-32.
Remove DC Power Supply
1
Retaining latch
Hardware Installation Guide for Cisco 4000 Series Integrated Services Routers
Remove and Replace Cisco 4000 Series ISRs Power Supplies
Figure
6-36) and remove the two screws that secure the
6-45
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