Cisco Carrier Routing System CRS-1 Installation Manual page 39

Chapter 2 Installing and Removing Power Components
This procedure assumes that the Cisco CRS 4-slot line card chassis is already mounted in a rack with
Note
sufficient room to access the sides and the bottom of the chassis.
Steps
To install the DC power shelf, follow these steps:
Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection
Step 1
sockets on the front (PLIM) side of the chassis or a bare metal surface on the chassis.
Step 2 If the AC power shelf is currently installed, remove it from the front of the chassis. (For details, see the
"Removing an AC Power Shelf" section on page
Removing the Rear Power Access Panels
Before you can install the power input module, you must remove the rear power access panels.
From the rear of the chassis, use a medium Phillips screwdriver to remove the rear power access panels
Step 3
(located on the bottom right and bottom left rear of the chassis). Remove the screws shown in
Figure
One screw on each side is located under the chassis (as shown in
Tip
safely, the chassis must be in a rack with adequate space below the chassis.
Figure 2-12
Step 4 Unscrew the coupling screw from each panel with a medium flat-blade screwdriver. Set aside the access
panels and their screws.
Note
OL-10971-10
2-12.
Removing the Rear Power Access Panels
You will need these screws later when you install the power input module (PIM).
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Installation Guide
2-26.)
Figure 2-12). To access this screw
S ID E A
Installing a DC Power Shelf
2-15