Brother International MFC-J4420DW Basic Users Guide - Page 45

A Routine maintenance A How to clean and check the machine A Cleaning the scanner A a Unplug the machine from the AC power outlet. b Lift the document cover (1). Clean the scanner glass (2) and the white plastic (3) with a soft lint-free cloth moistened with a non-flammable glass cleaner. 1 3 2 c (MFC-J4420DW) In the ADF unit, clean the white bar (1) and the glass strip (2) with a lint-free cloth moistened with a non-flammable glass cleaner. Checking the print quality A If faded or streaked colors and text appear on your printouts, some of the print head nozzles may be clogged. Check this by printing the Print Quality Check Sheet and looking at the nozzle check pattern. a Press . NOTE You can also press (Settings) and then press Maintenance. b Press a or b to display Improve Print Quality. c Press Improve Print Quality. d Press Check Print Quality. e Following the instructions on the Touchscreen, load Letter or A4 size plain paper in the paper tray, and then press Start. The machine prints the Print Quality Check Sheet. fA Check the quality of the four color blocks on the sheet. 1 2 33