Service manual

Maintenance
4-17
I/O PCBA Removal/Replacement
1. Remove the I/O and CPU PCBAs as described in the PCBA drawer removal instructions.
2. Disconnect all internal cables from the I/O PCBA.
3. Remove the two screws that secure the I/O PCBA to the rear of the drawer panel, if
applicable.
4. Remove the one screw in the center of the I/O PCBA that secures it to the CPU PCBA.
5. Remove all screws and screw locks that hold the connectors to the drawer panel, and slide
the I/O PCBA and CPU PCBA away from the panel.
6. Separate the I/O PCBA from the interconnect/CPU PCBA.
7. Reverse the removal procedure to replace the I/O PCBA.
8. Re-insert the PCBA drawer as described in the PCBA drawer replacement instructions.
Figure 4-7: I/O PCBA