Lexmark MX721 User Manual page 178

Maintaining the printer
3
Unpack the new toner cartridge, and then shake it to redistribute the toner.
4
Insert the new toner cartridge.
5
Close the door.
Replacing the imaging unit
1
Open door A.
Warning—Potential Damage: To prevent damage from electrostatic discharge, touch any exposed metal
frame of the printer before accessing or touching interior areas of the printer.
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