Cleaning The Paper Pick-Up Rollers - Brother  HL-4140CN User Manual

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Plug the machine's power cord back into
the electrical socket first, and connect all
cables. Turn on the machine.
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Cleaning the paper pick-up
rollers
If you have paper feed problems, clean the
pick-up rollers as follows:
a
Turn off the machine. Unplug the power
cord from the electrical socket.
b
Pull the paper tray completely out of the
machine.
A