Lexmark MX721 User Manual page 269

Troubleshooting
Action
Step 2
a
Match the paper size setting and the paper loaded in the tray.
b
Copy the document or photo.
Is the document or photo copied correctly?
Poor copy quality
Action
Step 1
a
Clean the scanner glass and the ADF glass with a damp, soft,
lint‑free cloth. If your printer has a second ADF glass inside the
ADF, then also clean that glass.
For more information, see
166.
b
Make sure that the document or photo is loaded facedown on
the upper left corner of the scanner glass.
c
Copy the document or photo.
Is the copy quality satisfactory?
Step 2
a
Check the quality of the original document or photo.
b
Adjust the scan quality settings.
c
Copy the document or photo.
Is the copy quality satisfactory?
Vertical dark streaks on output when scanning from the ADF
Leading edge
ABCDE
ABCDE
ABCDE
Trailing edge
"Cleaning the scanner" on page
Yes No
The problem is Contact
solved. support.
Yes No
The problem is Go to step 2.
solved.
The problem is Contact
solved. support.
269
customer
customer