I own a DCP 9020CDW
It has started to print very dirty pages, but randomly.
From time to now quite more dirty than clean.
Cleaned inside, revised fuser unit but found no clear damage.
I've used different toner cartridges, replaced black drum unit (prior was 45% life use) with an original brand new one but no joy.
Attached are three consecutives test pages.
One dirty, one completely clean and one mixed clean and dirty from first third top of page. They were printed with the same config of drum, toner, etc at the sime time.
No matter printing colour or B/N.
Any hint?
It has started to print very dirty pages, but randomly.
From time to now quite more dirty than clean.
Cleaned inside, revised fuser unit but found no clear damage.
I've used different toner cartridges, replaced black drum unit (prior was 45% life use) with an original brand new one but no joy.
Attached are three consecutives test pages.
One dirty, one completely clean and one mixed clean and dirty from first third top of page. They were printed with the same config of drum, toner, etc at the sime time.
No matter printing colour or B/N.
Any hint?
