Cisco 12012 Replacement Instructions Manual page 16

Removing and Replacing a DC-Input Power Supply
Step 12
Caution
sliding the power supply into the bay slot.
Step 13
Step 14
Step 15
This completes the DC-input power supply replacement procedure.
Proceed to the following section, "Checking the Installation," to verify the installation.
16 Cisco 12012 Gigabit Switch Router DC-Input Power Supply Replacement Instructions
If you are upgrading your Cisco 12012 with a second DC-input power supply, you must
remove the two power supply blanks covering the empty power supply bay slots before
installing the power supply. To remove a power supply blank:
Loosen the captive screw on the power supply blank faceplate that secures the power
(a)
supply blank to the card cage assembly.
Slide the power supply blank out the front of the power supply bay.
(b)
Repeat steps (a) and (b) to remove the second power supply blank. Retain the two
(c)
power supply blanks for possible future use.
To prevent damaging the backplane power connector, do not use excessive force when
Using two hands to support and guide the power supply, carefully slide it into the vacant
bay. Stop when the power supply captive jackscrew makes contact with the front of the
power supply bay.
The captive jackscrew is used to align and draw the power supply connector into
Note
the backplane connector. To prevent connector alignment problems, apply even pressure
on the power supply handle as you turn the captive jackscrew.
Keep one hand on the power supply handle and apply even pressure to the power supply
as you turn the captive jackscrew clockwise (insert) using a 10-mm nutdriver or flat-blade
screwdriver. Do not overtighten the jackscrew.
All electrical connections between the power supply and the backplane are made
Note
automatically when the power supply is fully inserted in the power supply bay.
Turn on the source DC circuit breaker servicing the DC-input power supply.
Do not turn on the DC-input power supply at this time.
Note