Cisco 12406 Replacement Instructions Manual page 24

Transferring the Power Distribution Unit
Cisco 12006 and Cisco 12406 Routers are equipped with one PDU, which mounts on the rear of the
chassis, near the bottom, behind the blower module. (See
wiring connectors, the DC PDU and the AC PDU are similar physical packages for purposes removing
and installing the PDU. The procedure in this section applies equally to both the AC and DC PDU.
The blower module must be removed from the defective chassis before you can remove the PDU.
Note
Power to your router must be off and all cables disconnected before you install the PDU. The PDU is
Warning
not a hot-swappable unit.
To transfer the PDU from the defective chassis to the replacement chassis, follow these steps:
Step 1 Attach an ESD-preventive strap to your wrist and connect the leash to the chassis or to another grounded,
bare metal surface. (See
Step 2 Remove the PDU from the chassis:
a.
b.
c.
Install the PDU in the replacement chassis:
Step 3
a.
b.
c.
d.
Except for the blower module, which you will install on the replacement chassis after you have
reconnected facility power to the PDU in a later procedure, the router—consisting of the replacement
chassis and its system components—is ready to be set in place of the existing, defective chassis.
Cisco 12006 and Cisco 12406 Router Chassis Replacement Instructions
24
Figure
Use a flat-blade screwdriver to loosen the captive screws (two on each side) that fasten the PDU
flanges to the back panel of the chassis. (See
Note The opening in which the PDU is housed is approximately 1/4 inch narrower than the PDU.
It is necessary to tilt the PDU at an angle to pull the PDU out of the back panel of the chassis.
Grasp the flanges on the sides of the PDU and pull the PDU outward to free the guide pins on the
PDU backplane connectors.
Slide the PDU to the left, pivot the right side of the PDU through the opening, and then remove the
PDU from the chassis opening.
Insert the left side of the PDU into the chassis opening first and shift the PDU to the left; then insert
the right side of the PDU into the chassis.
Align the guide pins on the PDU with the holes in the backplane.
Press the PDU against the backplane until the PDU connectors are seated in the backplane
receptacles and the flanges on the side of the PDU are flush against the chassis.
Use a flat-blade screwdriver to tighten the four captive screws on the PDU.
Figure
4.)
Figure 7, which shows the AC PDU)
6.) With the exception of the power
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