Cisco GSR12/60 - 12012 Router -AnyLAN, SONET/SDH Installation And Configuration Manual page 263

Step 8 Remove the two screws that secure the power cable bracket to the power supply
faceplate and remove the cable bracket. (See Figure 7-10.) Set the bracket and
screws aside.
Figure 7-10 Removing the Power Cable Bracket
Circuit breaker
alarm terminal
block
Power cable
bracket
Bracket screws
Before proceeding to the next step, verify that the source DC circuit breaker
Caution
servicing the DC power supply you are removing is in the OFF position. Also verify that
the power switch on the DC-input power supply is OFF (O). As an additional check,
measure the voltages across the leads attached to the power supply you have removed. All
readings should be zero volts.
Removing and Replacing a DC-Input Power Supply
Standoff
Source DC
power cable
Maintaining the Cisco 12012 7-23