Service manual

Power Cabinet Component Removal and Replacement 5-15
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. Access to a particular fan depends upon whether the PCI box is at the top of
a cabinet or underneath another PCI box. If the broken fan is in the top
PCI box, you can get to it without taking the box out of the cabinet. If, on
the other hand, the broken fan is in a PCI box underneath another box, you
may have to take the box out of the cabinet. Follow the appropriate
procedure described in Section 5.1 step 7 or step 8.
6. If the broken fan is PCI fan 1 on the left looking at the box from the rear, do
the following:
1. Unscrew the captive fastener that holds the fan in place and lift it up
but not completely free of the box.
2. Unplug the fan from the backplane and remove.
7. If the broken fan is PCI fan 2 on the right looking at the box from the rear,
do the following:
1. Move the cables from the standard I/O module that pass over the fan out
of the way.
2. Disconnect the signal cable from the DVD/CD-ROM that also passes
over the fan and fold it into the card cage section of the box.
3. Unscrew the captive fastener that holds the fan in place and lift it up
but not completely free of the box.
4. Unplug the fan from the backplane and remove.
Replacement
Reverse the steps outlined in the removal procedure.
Verification
Power up the system and check that the PCI box with the new fan powers up
without error.