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Brother MFC-J5520DW leaves white vertical lines

My brother printer leaves behind white lines in the vertical direction. I tried cleaning the rollers and the alignment function on the printer, but it didn't help. Any other ideas on what could be causing this?

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I had a similar problem with my printer (Brother MFC-J6545DW). What helped for me was to clean the print nozzles on the strong setting.

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Mr. Awesome crwdns2934231:0crwdne2934231:0
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