Lexmark E450DN - E 450dn B/W Laser Printer Service Manual page 91

8.
Tilt the front cover down, and disconnect it on the left side from the link.
Warning: Make sure that the link is not bent or pulled out farther than normal. Otherwise, the toner cartridge
coupler may become dislodged.
9.
Remove the front access cover.
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4-3
Repair information