Brother MFC-J6510DW Service Manual page 56

Error Code 18
Paper Jam
In switchbacking of paper for printing on the second side, a recording paper jam has occurred.
(The paper feed sensor does not come ON even after the recording paper is fed for the specified
paper feeding amount.)
User Check
- Remove the jammed paper.
- Check whether the recording paper being used is within the specification.
- Clean the switchback (SB) roller.
Step
1 Foreign materials in the duplex
print paper path
2 Paper feed sensor actuator caught
on the surrounding parts
3
Main PCB defective
Cause
Remove foreign materials.
Reposition the actuator.
Replace the main PCB ASSY.
2-26
LCD
Solution
Confidential