SC815 Chassis Manual
5-8
5-9
Chapter 5: Chassis Setup and Maintenance
5-5 Installing the Motherboard
Figure 5-9 Chassis Standoffs
Permanent Standoffs
Optional Standoffs
Permanent and Optional Standoffs
Standoffs prevent short circuits by securing space between the motherboard and
the chassis surface. The SC815 chassis includes permanent standoffs in locations
used by most motherboards. These standoffs accept the rounded Phillips head
screws included in the SC815 accessories packaging.
Some motherboards require additional screws for heatsinks and/or general compo-
nents. Optional standoffs are included for these motherboards. To use an optional
standoff, you must place the hexagonal screw through the bottom the chassis and
secure the screw with the hexagonal nut (rounded side up).
Installing the Motherboard
1. Review the documentation that came with your motherboard. Become famil-
iar with component placement, requirements, and precautions.
2. Power down the system and remove the power cord from the rear of the
power supply. Remove both power cords if your system includes a redundant
power supply. Remove the chassis cover as described in Section 5-3. Open
the chassis cover.
3. If necessary, remove the riser card. To do this, remove the two screws hold-
ing the card in place and lift the card from the chassis.
4. As required by your motherboard, install standoffs in any areas that do not
have a permanent standoff:
A. Place a hexagonal standoff screw through the bottom the chassis.
B. Secure the screw with the hexagonal nut (rounded side up).
5. Lay the motherboard on the chassis aligning the permanent and optional
standoffs
6. Secure the motherboard to the chassis using the rounded, Phillips head
screws. Do not exceed eight pounds of torque per square inch, when tighten-
ing down the motherboard.
7. Secure the CPU(s), heatsinks, and other components to the motherboard,
chassis, and/or backplane as needed.
8. Reconnect the power cord(s), power up the system and replace the chassis
cover.
Figure 5-10. Chassis with a Riser Card ("U" Models Only)
Riser Card