Service manual

Power Cabinet Component Removal and Replacement 5-5
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. 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. Remove cables connected to the standard I/O module at the PCI box bulkhead.
6. Disconnect the two cables that connect to the top edge of the standard I/O module.
7.
Remove the screw holding the module to the frame at the bulkhead of the card cage.
8.
Lift the securing levers at both ends of the module to release it from its connector on
the backplane.
9. Since there may still be one cable connected to the module, carefully lift the module
out of the box and hold it to the right of the box.
10. Disconnect the remaining cable from the side of the module.
Replacement
Reverse the steps outlined in the removal procedure. The system serial number, the SCM
monitor, and SRM console firmware reside on this module.
• Use the SRM set sys_serial_num command to set the system serial number.
• If you need to update the firmware, see Appendix D. Put the OCP switch back in its
original position.
Verification
Power up the system and check that the new standard I/O module is functioning.
Execute the SRM set sys_serial_num command.