Service manual

Power Cabinet Component Removal and Replacement 5-7
2. If the system is not partitioned, shut down the operating system and issue
the SRM power off command. Put the OCP switch in the Off position.
Skip to step 4.
3. If the system is partitioned, from the console connected to the partition to
which the PCI box containing the target FRU is attached, shut down the
operating system and power it off using the SRM power off command.
Put
the OCP switch in the Secure position. Pull the plugs on the target PCI
power supplies.
4. Follow the procedure described in Section 5.1 to gain access to the PCI card
cage section of the box. Be sure to unplug both power supplies at the front
of the PCI box before pulling it from the cabinet.
5. If there is a standard I/O module in this PCI box, remove it. See Section
5.1.1.
6. Disconnect the CSB cable that connects to the CSB node ID module at the
bulkhead.
7. Although the CSB node ID module is inside the PCI card cage, four screws,
two on the right side of the box and two on the rear attach it to the box from
the outside. Remove the four screws.
8. Lift the module from the PCI card cage and disconnect the cable from it to
the PCI backplane. (17-04800-01)
Replacement
Reverse the steps outlined in the removal procedure. Be sure the CSB node
ID on the new module is the same as the ID you are replacing.
To increment the node ID number, push the small button below the number
using a pencil or pen. To decrement the node ID number, push the small button
above the number using a pencil or pen.
Verification
Power up the system and check that the PCI with the changed CSB node ID
module is seen by the system.