Brother MFC-J6510DW

2-48
Confidential
 Error Code 84
Recording paper jam in paper ejecting. (Any of the paper feeding sensor, registration sensor and
switchback paper sensor sticks to ON even after completion of paper ejection.)
User Check
- Remove the jammed paper.
- Clean the switchback roller.
Paper Jam
LCD
Step Cause Solution
1 Paper feed sensor actuator caught
on the surrounding parts
Reposition the actuator.
2 Registration sensor actuator
caught on the surrounding parts
Reposition the actuator.
3 Switchback paper detection
actuator caught on the
surrounding parts
Reposition the actuator.
4 Paper feed sensor harness
connection failure
Check the connection and reconnect the harness.
5 Paper feed sensor defective Replace the PF encoder/PF sensor harness unit.
6 Registration sensor harness
connection failure
Check the connection and reconnect the harness.
7 Registration sensor defective Replace the registration sensor PCB ASSY.
8 Switchback paper sensor
defective
Replace the switchback paper sensor PCB ASSY.
9 Paper ejection roller worn out Replace the engine unit.
10 Main PCB defective Replace the main PCB ASSY.