2-27
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Installation Guide
OL-10971-10
Chapter 2 Installing and Removing Power Components
Removing an AC Power Shelf
Caution
Prior to removing the AC power shelf, to reduce the risk of damage, ensure that the rear panel fasteners
are disengaged, the input power cables are disconnected, and the air intake (inlet) grille is removed.
See
Figure 2-23
for an illustration of the AC power shelf.
Prerequisites
Before performing this task, you must first remove the air intake grille from the bottom of the chassis,
power down the chassis (see the
“AC Power Supply Cord Illustrations and Plug Types” section on
page 2-4
), and detach the power cords.
Required Tools and Equipment
You need the following tools to perform this task:
•
ESD-preventive wrist strap
•
Medium flat-blade screwdriver
Steps
To remove an AC power shelf, follow these steps:
Step 1
Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection
sockets on the front (PLIM) side of the chassis or a bare metal surface on the chassis.
Step 2
Remove all four power supplies from the shelf you are removing. (See the
“Removing a Power Supply”
section on page 2-30
.)
Step 3
Remove the power cables from the power from the four power inlets.
Step 4
While facing the rear (SFC) side of the chassis, use the screwdriver to loosen the two captive screws that
connect the rear of the chassis to the power shelf by turning them counterclockwise.
Step 5
Pull the lever handles down with both hands and slide the AC power shelf partway from the slot in the
chassis.
Caution
An empty AC power shelf weighs about 7.0 lb (3.2 kg). To prevent injury when lifting the
shelf, keep your back straight and lift with your legs, not your back. Avoid sudden twists or
lateral moves.
Step 6
Placing one hand underneath the AC power shelf and pulling on it and steadying it with the other hand,
slide the shelf completely from the chassis. (If attached, be sure to thread the power cable through the
chassis carefully.)
Step 7
Set the AC power shelf carefully aside.
