Visara FEP-4600 - Manual (Page 68)

Chapter 6. Maintenance
6-4 707118-001
10. Remove the 11 Type A (6-32) screws fastening the motherboard to
the chassis.
11. With the disconnected cables moved out of the way, raise the front
of the motherboard and gently pull the board forward to clear the
connectors from the rear panel.
12. Place the removed motherboard onto an antistatic surface.
Replacement Procedure
1. Remove the replacement motherboard from its antistatic container.
2. Before installing the replacement motherboard, verify that the
mount holes are in the same location on both boards. The chassis
contains various mounting positions for the motherboard standoffs.
If necessary, standoffs can be removed.
3. Install the motherboard by inserting the connectors located at the
rear into their respective openings and sliding them through. This
will allow the front of the motherboard to move downward to the
standoff mountings.
4. Verify that all standoffs are visible through the motherboard
mounting holes.
5. Install the 11 motherboard mounting screws starting at a mounting
hole in the vicinity of the center of the motherboard but do not
tighten.
6. Once all 11 screws are installed tighten the screws down starting
from the center and work outwards. This will help align the card