Replacement
Note: Only nine mounting screws are required. If the system planar was installed with 11
mounting screws, two of them may be discarded.
1. Before replacing the system planar in the CPU module, perform the following:
a. Thread all of the mounting screws into the system planar.
b. Position the system planar over the mounting holes.
Note: Do not tighten any of the system planar mounting screws until all of the screws are
installed and are started in the mounting holes.
c. Thread all of the mounting screws through the system planar and into the mounting
holes of the CPU module.
d. After all of the mounting screws are inserted through the system planar and into the
mounting holes, tighten all of the mounting screws.
Replace in the reverse order.
Removal and Replacement
4-55