IBM pSeries 670, Service Manual

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I/O Subsystem I/O Backplane Assembly
Removal
Note: If multiple I/O planars or I/O Drawer DCAs are being replaced during a maintenance window, then
they must be replaced one at a time in order to ensure the I/O Drawer serial number does not
become damaged. After a single part is replaced, the I/O drawer needs to have power applied to it
and the system brought to the OK prompt. At this point, the system can be powered off to replace
the next part. An algorithm is used (shortly after the UEPO is turned on) to overwrite the new part.
If more than one part is replaced at a time, the VPD will not be updated and the system will not be
able to boot in LPAR mode.
1. Power off the system as described in “Powering Off and Powering On the System” on page 779.
2. Disconnect and label all cables from the adapters on the affected I/O backplane.
3. Remove and label adapters. (See “PCI Adapters” on page 851).
4. Remove the two screws securing the I/O backplane to the subsystem.
5. Insert the I/O subsystem backplane removal tool (part number 44P0549), and pry the tool backward to
remove the board from the connector.
Note: If the I/O subsystem is in the bottom position of the rack, the I/O subsystem may need to be
removed from the rack to allow correct usage of the I/O subsystem backplane removal tool to
install a new I/O backplane.
6. Slide the I/O subsystem backplane assembly to the rear.
Note: Be sure to hold the board level to ensure that the board can clear the step in the cover and
then again to clear the EMC gasket.
7. Remove the assembly.
1
2
1 Backplane removal tool (part number 11P4789)
2 Backplane removal and insertion tab
Chapter 9. Removal and Replacement Procedures
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