Lexmark CX920 User Manual page 274

Upgrading and migrating
Installing an optional card
CAUTION—SHOCK HAZARD: To avoid the risk of electrical shock, if you are accessing the controller
board or installing optional hardware or memory devices sometime after setting up the printer, then turn
the printer off, and unplug the power cord from the electrical outlet before continuing. If you have any
other devices attached to the printer, then turn them off as well, and unplug any cables going into the
printer.
1
Turn off the printer.
2
Unplug the power cord from the electrical outlet.
3
Using the screwdriver stored inside door A, remove the connector cover from the rear of the printer.
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