Question about Brother DCP-7020 All-In-One Laser Printer
The unit prints a heavy, rough looking, irregular, black coating on paper with different toner cartridges. What is the most likely cause of this?
This is caused by corona arcing in the drum unit. When you install the toner cartridge into the drum unit there is a blueish colored plastic tab on top of the drum unit that you can slide back and forth to clean part of the corona. Slode this back and forth at least 5 to 10 times. I would try this first and see if the problem goes away. I have seen this many times and about 50% of the time the plastic slide will resolve the issue. If not you can either go ahead and replace your drum unit with a new one or the charge corona assembly will have to be removed and cleaned.
Good Luck and Thank You for using Fixya.
Posted on May 27, 2010
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Posted on Jan 02, 2017
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