imageCLASS MF726Cdw leaves ink marks

[FedericoMariano]

Hello, my Canon color Image Class mf726cdw leaves faded block ink marks on the sides (vertical lines) on the side of the paper and sometimes towards the center. I tried different things (such as self cleaning, also taking out all the cartridges and dusted them) and I had no solution. What can I do?

Thanks

[biomedposter]

I have the same issue. Let me know if you find answers. 

[Lithoman]

There are two possibilities with this. The toner cartridge is "bleeding" toner which will cause this or the fixing film is at end of life and will need a new assembly. Do you have photo samples of the issue?

I would start with trying a different cartridge first. Even after opening you can pull it back out and wrap for use next. If kept well it will not go bad.

Are these Canon OEM cartridges or 3rd party?

[FedericoMariano]

Thanks. It actually worked