Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 770)

Section 15B
Replacement Procedures
15B-14
4. Remove the 12 screws shaded in this figure.
19101
These are guideposts for
installing the motherboard, not
screw locations.
5. Remove the motherboard from the component enclosure and lay it
down on a clean surface with the connectors facing up.
6. Locate the software option chip with this figure. With a dip extractor,
remove the chip from the motherboard. You may want to label it
before storing it. When the new or repaired motherboard is received,
replace the software option chip.
Remove with dip extractor