|What do you have your Printing Preference > Print Settings set to? Is it Graphics or Text? 600 DPI?|
Both mine are set default to "graphics" 600 DPI however my new printer was leaving toner, didn't matter which drum or toner was switched out , where as the older MFC was fine with either and is perfect pages.(they use the same drum and toner) I set the new Brother leaving toner marks to "text" and my test page seemed to be clear, no toner residue unlike with the "graphics" setting. I went and changed the older MFC to the same "Text" and cannot see a difference from what it was before.
I am just curious what you have yours set at. Will "text" save more toner than "graphics" mode?
Models MFC-L5800 DW and HL-6200DW TIA