Service manual

Power Cabinet Component Removal and Replacement 5-21
Removal
1. If the operating system in control of the PCI containing the target FRU
supports hot-swap I/O and taking the I/O resources away from it will allow
it to continue to operate, follow operating system procedures to put the local
I/O riser into the hot-swap state. See Section 4.3.1 and skip to step 4.
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.
4. Unplug the power supplies in the target PCI box.
5. In systems that have two or more master PCI boxes, access to a particular
standard I/O interface module depends on whether it is in the PCI box at
the top of a cabinet or underneath another PCI box. If the broken interface
module is in the top PCI box, you may be able to get to it without taking the
box out of the cabinet. If, on the other hand, the broken device is in a PCI
box underneath another box, determine whether you need to remove the box
from the cabinet or not. Follow the appropriate procedure described in
Section 5.1 step 7 or 8.
6. Remove the SCSI disk above the standard I/O interface module. See Section
5.1.8.
7. Unplug all cables connected to the standard I/O interface module at the
front of the PCI box.
8. Unplug the signal cable from the standard I/O interface module.
9. Unscrew the two Phillips head screws that hold the module in place and
remove the module.
Replacement
Reverse the steps outlined in the removal procedure.
Verification
Power up the system and check that the I/O subsystem powers up without error.