Procedure
1. Label and remove the two power cords from the rear of the system.
For instructions, see “Disconnecting the power cords from a 7063-CR2 system” on page 100.
2. Label and remove all cables from the rear of the system.
3. Lighten the system by removing the two power supplies.
For instructions, see “Removing a power supply from the 7063-CR2 system” on page 51.
4. Lighten the system by removing the system backplane from the rear of the system.
a) Label and remove the signal cables from the rear of the system.
b) Loosen the two screws (A) on the sides of the system backplane as shown in the following gure.
Figure 125. Removing the system backplane screws
c) Simultaneously rotate the two levers (A) on each side of the system backplane out and to the side
to unlock the system backplane from the system.
Figure 126. Unlatching the system backplane
d) Support the system backplane by the bottom as you slide it from the system.
Figure 127. Removing the system backplane
e) Place the system backplane on an ESD surface.
Note: You must remove and replace the system backplane at a flat angle. The ventilation holes in
the top cover can come into contact with the DIMMs in the system backplane if the insertion of the
backplane is at an angle or is rushed. As a result of possible contact, DIMMs can be scratched and can
leave residue on the top cover.
5. Remove the front screws that secure the system to the rack from both sides of the system as shown in
the following gure.
102
Power Systems: Servicing the IBM Power Systems HMC (7063-CR2)
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