Service manual

Power Cabinet Component Removal and Replacement 5-3
PCI Box Access
1. Remove the I/O resources from the operating system by whatever means necessary.
You may have to shut down the system or a partition or use some other means
available through the particular operating system or SRM. See individual FRU
removal and replacement procedures.
2. Open the front door of the cabinet and unplug the PCI power supplies.
3. Open the rear door of the cabinet.
4. Take whatever steps are necessary to clear cables from the path required to pull the
particular PCI box from the cabinet.
5. Release the two black plastic latches on either side of the box rails that hold the box
in place by pushing them toward each other.
6. Pull the box out of the cabinet until its slides latch in the fully extended position.
7. To access all devices in the card cage section of the PCI box, unscrew the two captive
screws
holding the back cover to the box. Tilt it up and lift it away from the box.
8. If you need access to PCI fans, the DVD/CD-ROM drive, the SCSI FIS disk, or the
standard I/O interface module, remove the three Phillips head screws
that hold
the front cover to the box. Tilt it up and lift it away from the box. If a storage unit is
above the target PCI box, access to the media section is possible from the back of the
cabinet. If another PCI box is installed above the target, to remove the front cover,
the target PCI box is pushed back into the cabinet, and the box just above the target
is pushed back out the rear of the cabinet (steps 4 – 5). Access to the target is now
possible from the front of the system.
9. If you are replacing the PCI backplane or if you cannot access devices that must be
replaced in the box’s front compartment, remove the box completely by:
• Unplugging the power cords,
• Removing all cables from the box at the bulkhead,
• Following steps 4 and 5 above, and
• Pressing the latches on the box rails and then pulling until the drawer is free of
its rails.