Allen-Bradley 1779-KFMR User Manual page 66

Chapter 5
Operation and Troubleshooting
5 10
16. With the screws removed, you can slide the faulted board straight out
the back of the removable frame.
17. Replace the faulted board with a spare.
18. Replace the mounting screws.
19. Reconnect the three ribbon cables to the back of the boards.
CAUTION: Do not misalign the pins when connecting the
bottom ribbon cable (Figure 5.5). Failure to heed this caution
could cause damage to the boards.
Figure 5.5
Misalignment of Pins on Bottom Ribbon Cable Connector