Lexmark MS821dn User Manual

Vertical dark streaks with print missing
Note: Before solving the problem, print the Print Quality Test Pages. From the control panel, navigate to
Settings > Troubleshooting > Print Quality Test Pages. For non‑touch‑screen printer models, press
to
navigate through the settings.
Action Yes No
Step 1
a Remove the imaging unit.
Warning—Potential Damage: Do not expose the imaging unit
to direct light for more than 10 minutes. Extended exposure
to light may cause print quality problems.
Warning—Potential Damage: Do not touch the
photoconductor drum under the imaging unit. Doing so may
aect the quality of future print jobs.
b Remove any packing material that is stuck on the imaging unit.
Note: Make sure to remove any obstruction between the
charge roller and photoconductor drum.
c Insert the imaging unit.
d Print the document.
Do vertical dark streaks with missing images appear on prints?
Go to step 2. The problem is
solved.
Troubleshooting 178

Lexmark MS821dn Specifications

General

Print Technology	Monochrome Laser
Print Resolution	1200 x 1200 dpi
Duplex Printing	Yes
Processor Speed	1 GHz
Standard Memory	512 MB
Standard Paper Input	650 sheets
Output Capacity	550 sheets
Monthly Duty Cycle	Up to 275, 000 pages
Connectivity	USB, Ethernet
Network Ready	Yes
USB Port	Yes
Operating System Compatibility	Windows, Mac, Linux
Maximum Paper Input	4400 sheets
Print Speed	Up to 55 pages per minute
Ethernet	Gigabit Ethernet