280-Watt AC-Input Power Supply Replacement Instructions 13
Dual Power Supply Configuration
Turning Off the Power Supply and Disconnecting AC Input Power
To turn off the AC-input power supply you plan to replace, complete the following steps:
Step 1 Facing the rear of the router, place the power switch (on the power supply) in the OFF (O)
position.
Step 2 Observe the following items:
• The green OK LED on the power supply turns off
• The second power supply maintains full system power (the system continues to
operate as normal)
This completes the procedure turning off the AC-input power supply.
To disconnect AC input power to the power supply, complete the following steps:
Step 1 Unplug the input power cable from the power source.
Step 2 Push up on the cable-retention clip that secures the input power cable to the router’s
power supply.
Step 3 Unplug the input power cable from the power supply.
This completes the procedure for disconnecting AC input power to the power supply.
Removing the AC-Input Power Supply
Complete the following steps to remove the AC-input power supply from Cisco 7200 series routers:
Step 1 Using a number 2 Phillips or a 3/16-inch, flat-blade screwdriver, loosen the two captive
screws on the faceplate of the power supply. (Refer to Figure 3.)
If the router is not installed in a standard 19-inch, 4-post or telco rack, skip to Step 5. If
the router is installed in a rack, determine if any permanent rack fixtures, such as a power
strip, are obstructing access to the power supply. If a rack fixture is obstructing access to
the power supply, proceed with Step 2.
Step 2 Use a 3/16-inch flat-blade screwdriver to loosen the screws that secure the router to the
front mounting strips of the rack.
Step 3 Position at least one person in front of the rack to support the front underside of the router.
Step 4 From the rear of the rack, carefully push the router out of the front of the rack until there
is enough clearance to remove the power supply from the router.
Step 5 Grasp the power supply handle and pull the AC-input power supply from the router.
Step 6 If you do not intend to replace a second power supply, install the filler plate on the empty
power supply bay. Using a number 2 Phillips or a 3/16-inch, flat-blade screwdriver,
tighten the filler plate’s captive screws.
This completes the procedure for removing the AC-input power supply from Cisco 7200 series
routers.
Replacing the AC-Input Power Supply and Connecting Input Power
To install a new AC-input power supply in Cisco 7200 series routers, complete the following steps:
Step 1 Make sure the power switch on the power supply is in the OFF (O) position.
Step 2 Grasp the power supply handle with one hand and place your other hand underneath the
power supply for support. (Refer to Figure 4.)
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