Brother HL 4150CDN - Manual (Page 121)

Routine Maintenance
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5
c
Wipe the outside of the machine with a dry, lint-free cloth to remove dust.
d Remove anything that is stuck inside the paper tray.
e Wipe the inside of the paper tray with a dry, lint-free cloth to remove dust.
f Put the paper tray back in the machine.
g Connect interface cables and then plug the machine back in. Turn on the power switch.