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


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




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.

Bay Area - CA

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