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Vertical Black Smudges Seen on the Printouts

Document ID:SO8463

Usergroup :External
09/06/17 Properties  


This document is applicable to the following Lexmark printer models:

  • Single function: CS720, CS725, CS727, CS728, C4150
  • Multi-function: CX725, CX727, XC4140, XC4150



Smudge or smear occurring on the side the page and the length may vary, typically between 0.5 – 2.0 inches vertically. The defect is observed to repeat at imaging kit frequency (94 mm period), although some pages may not show it. See sample printouts below:





Perform these steps below to fix the issue.

Step Action Yes No

Load a new, dry, supported media. Then re-print to see whether this issue persists.

Has the print quality improved?

Issue resolved See Step 2.

Ensure that the paper path is free from any contamination.

Did this resolve the issue?

Issue resolved Contact Lexmark Technical Support.



Contacting Lexmark

If you need additional assistance, please go to the Lexmark support site, type your printer model and locate Get in Touch with Lexmark! for contact information. NOTE: When calling for support, you will need the following:

  • Printer model
  • Printer serial number (CS72x/CX725
  • Toner/imaging unit/waste toner bottle part number and serial number (for supply-related issues)

Please be near the product/s described in this article to expedite the support process and reduce callbacks.



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