Cisco 6503 - Catalyst Firewall Security Sys Installation Manual page 235

Chapter 4 Removal and Replacement Procedures
Removing a 2700 W DC-Input Power Supply
Warning Before performing any of the following procedures, ensure that power is removed from the DC
circuits. To ensure that all power is removed, locate the circuit breakers or fuses on the DC power
lines that service the DC circuits. Turn OFF the DC power line circuit breakers and remove the DC
power line fuses. Statement 322
Warning Voltage is present on the backplane when the system is operating. To reduce risk of an electric shock,
keep hands and fingers out of the power supply bays and backplane areas. Statement 166
To remove a DC-input power supply, follow these steps:
Verify that source DC power is off to the DC circuit that feeds the power supply that you are removing.
Step 1
As an added precaution, place the appropriate safety flag and lockout devices at the source DC power
circuit breaker, or place a piece of adhesive tape over the circuit breaker handle to prevent accidental
power restoration while you are working on the circuit.
Step 2 Remove the four screws that secure the terminal block cover (clear plastic) and slide the cover off of the
terminal block. Set the cover and the screws aside. (See
Step 3 Remove the two screws securing the fixed cable guide top half and set the cable guide piece and the
screws aside. (See
Remove the two screws securing the detached cable guide top half to the bottom half. Remove both cable
Step 4
guide pieces and the screws and set them aside.
Note
OL-5781-08
Figure 4-19.)
In addition to the two cable guides, there might be a tie wrap securing the source DC cables and
two tie wraps securing the ground cable to the fixed cable guide. You will need to cut all of these
tie wraps in order to free the source DC cables and the ground cable for removal.
Removing and Installing the DC-Input Power Supplies
Figure 4-19.)
Catalyst 6500 Series Switches Installation Guide
4-29