8700 Paper Jam; Switchback Sensor Cannot Detect Paper Feeding State Even Papers Are - Brother HL-J6000DW Service Manual

■ Error Code 8700
Paper jam.
- Switchback sensor stays in paper feeding state even after completion of paper
ejection action.
< User Check >
- Remove the jammed paper in front part.
- The paper tray is not set correctly.
Step
1 Foreign materials in the
feeding path
2 Switchback actuator caught on
the surrounding parts
3 Switchback outer paper guide
not mounted in place
4 Paper feed roller or switchback
roller stained
5 Paper feed roller or switchback
roller defective
6 PF encoder sensor defective
7 Maintenance unit defective
8 Main PCB defective
■ Error Code 8800
Paper jam.
- Switchback sensor cannot detect paper feeding state even papers are fed during
printing.
< User Check >
- Remove the jammed paper in platen part and front part.
Step
1 Foreign materials in the
feeding path
2 Switchback actuator caught on
the surrounding parts
3 Switchback sensor harness
connection failure
4 Paper feed roller or paper
ejection roller stained
5 Paper feed roller or paper
ejection roller defective
6 PF encoder sensor defective
7 Maintenance unit defective
8 Main PCB defective
Cause
Remove foreign materials.
Set the switchback frame ASSY into place.
Set the switchback outer paper guide into place.
Clean the paper feed roller or switchback roller.
Replace the paper feed roller or switchback
roller.
Replace the PF encoder sensor PCB.
Replace the maintenance unit.
Replace the main PCB.
Cause
Remove foreign materials.
Set the switchback frame ASSY into place.
Reconnect the switchback sensor harness.
Clean the paper feed roller or paper ejection
roller.
Replace the paper feed roller or paper ejection
roller.
Replace the PF encoder sensor PCB.
Replace the maintenance unit.
Replace the main PCB.
2-48
Solution
Solution
Confidential