Brother HL-5240 - Manual (Page 84)

6. Routine Maintenance
76
To prevent damage to the printer from static electricity, DO NOT touch the electrodes shown in the
illustration.
d Wipe the scanner window with a dry, lint-free cloth.
e
Put the drum unit and toner cartridge assembly back in the printer.
f
Close the front cover.
g
Plug the printer back in, and then turn on the power switch.