Brother HL-3140CW User Manual page 170

Troubleshooting
Paper is jammed underneath the Paper Tray
If the LCD shows Jam 2-sided, follow these steps:
a
Leave the machine turned on for 10 minutes for the internal fan to cool the extremely hot parts inside the
machine.
b
Pull the paper tray completely out of the machine.
c
Make sure that the jammed paper does not remain inside the machine.
d
If paper is not caught inside the machine, check underneath the paper tray.
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