Brother HL 2270DW - Manual (Page 91)

Routine Maintenance
87
4
Cleaning the drum unit
4
If your printout has white or black spots at 94 mm (3.71 in.) intervals, follow the steps below to solve the
problem.
a Prepare blank A4 or Letter size paper.
b Make sure the machine is in Ready mode.
c Open the front cover and the back cover (face-up output tray).