Oracle SPARC T5-2 Service Manual page 148

Install the Motherboard
You must guide two slots on the PS backplane cover around two pins on the inside of the
power supply cage.
b. Fit the two slots on the cover around the two pins.
c. Lift up the cover a little to guide the two pins into the other part of the slots.
d. Attach the screw to fasten the PS backplane cover in place.
Push the power supplies back into place.
6.
7. Reattach all cables to the motherboard.
In the center rear of the motherboard, connect the fan board power cable
a.
and the ribbon cable to the motherboard.
b. Near the drives, connect two shorter cables to the motherboard.
One cable goes to the drive backplane. The other is a ribbon cable to the power supply.
c. Near the drives, connect two longer cables between the motherboard and
the drive backplane.
8. Reinstall the System Remind button assembly (air divider) by sliding it into the
chassis.
Caution -
the air divider securely. This dividing wall maintains a pressurized seal between the server
cooling zones. Without this pressurized seal, the power supply fans will not be able to draw
enough air to cool the drives properly.
9. Reconnect all cables from the PS backplane, drive backplane, and fan board to
their original locations on the motherboard.
10. On a 1-processor motherboard, attach the airflow baffle to the empty side of the
center bracket.
Note -
On the memory riser side of the center bracket, align the airflow baffle over
a.
the four unused slots.
148 SPARC T5-2 Server Service Manual • February 2017
After replacing the motherboard, inspect the gasket on the air divider before installing
Use the airflow baffle that you saved from the old 1-processor motherboard.