Lexmark CX421 User Manual

Installing a memory 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 o, and unplug the power cord from the electrical outlet before continuing. If you have any
other devices attached to the printer, then turn them o as well, and unplug any cables going into the
printer.
1 Turn o the printer.
2 Unplug the power cord from the electrical outlet, and then from the printer.
3 Using a flat‑head screwdriver, remove the controller board access cover.
Warning—Potential Damage: Controller board electronic components are easily damaged by static
electricity. Touch a metal surface on the printer before touching any controller board components or
connectors.
Upgrading and migrating 236

Lexmark CX421 Specifications

General

Processor Speed	800 MHz
Standard Input Capacity	250 sheets
Standard Output Capacity	100 sheets
Functions	Print, Copy, Scan, Fax
Copy Resolution	600 x 600 dpi
Scan Resolution	Up to 600 x 600 dpi
Fax Resolution	Up to 300 x 300 dpi
Print Technology	Laser
Connectivity	USB 2.0, Ethernet
Duplex Printing	Automatic
Memory	1024 MB