Lexmark MS531 User Manual page 150

Troubleshoot a problem
Action
Step 2
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
affect 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?
Repeating defects
Note: Before solving the problem, print the Print Quality Test Pages. From the home screen, touch Settings >
Troubleshooting > Print Quality Test Pages.
Action
Step 1
Using the Print Quality Test Pages, check if the distance between
the repeating defects is equal to any of the following:
•
97 mm (3.82 in.)
•
47 mm (1.85 in.)
•
38 mm (1.5 in.)
Does the distance between the repeating defects match any of the
measurements?
Step 2
a
Replace the imaging unit.
b
Print the document.
Do the repeating defects appear?
Yes No
Contact customer The problem is
support. solved.
Yes No
Go to step 2. Take note of the
distance, and then
contact
support.
Contact customer The problem is
support. solved.
150
customer