Brother HL-3170CDW - Manual (Page 173)

Troubleshooting
167
5
Paper is jammed at the back of the machine
5
If the LCD shows Jam Rear, a paper jam occurred behind the back cover. 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 Open the back cover.
WARNING
HOT SURFACE
After you have just used the machine, some internal parts of the machine will be extremely hot. Wait for the
machine to cool down before you touch the internal parts of the machine.