Why black lines and shades are appearing when printing documents from the mf642dw printer?

[MohamedUmer]

Hello there,  

I am trying to print a document related to the office, I am facing an issue with black color printing documents, as the paper printed with shades and lines shown in the image below.

WhatsApp Image 2024-02-18 at 12.19.38 PM.jpeg

other color documents are printing fine only black is printing like this, even after i changed the toner, its the same,

please let me know what measures to be taken here to  

I even changed the black toner, but its

 

[shadowsports]

Greetings,

Since the black toner is not low, I would open the printer and inspect the paper paths for spilled toner. A small vacuum can be helpful here.  The fixing assembly could also be dirty.  You can clean using the printers LCD. 

From the printer's LCD..  
Menu> Adjustment/Maintenance> Maintenance> Clean Fixing Assembly> Check that the paper indicated in the screen is loaded, and then select OK> Start> One sheet with a cleaning pattern printed on it is ejected when cleaning is completed.

[Amaslaluno]

Hi, when I attempt to do that, I am getting a “could not perform cleaning” error message. Any idea what the problem could be? Thanks!

[mreg]

It could be the use of third party toner cartridges.

[shadowsports]

Greetings,

Third party toner is certainly possible.  There's also an auto cleaning setting that if enabled keeps you from running the maintenance service manually.