Switchback Sensor Detects No Paper Tray 1 State; Head/Carriage Unit Cannot Shift To Head Capping Position; Head/Carriage Unit Cannot Shift To Head Uncapping Position - Brother MFC-J3520 Service Manual

Error Code 67

Paper tray not detected

Switchback sensor detects no paper tray 1 state.

User Check
- Set paper tray1.
Step
1 Switchback actuator caught on
the surrounding parts
2 Switchback sensor harness
connection failure
3 Outer paper guide wear/
defective
4 Paper tray 1 defective
5 Main PCB defective
Error Code 75

Unable to Print 75

Head/carriage unit cannot shift to head capping position.

Error Code 76
Unable to Print 76

Head/carriage unit cannot shift to head uncapping position.

User Check
Remove the jammed paper in platen part and maintenance unit part.
Step
1 CR encoder strip out of place
2 Foreign materials in the
maintenance unit
3 Foreign materials in the engine
unit
4 Carriage motor defective
5 Maintenance unit defective
6 Main PCB defective
Cause
Set the switchback frame ASSY into place.
Reconnect the switchback sensor harness.
Replace the outer paper guide.
Replace the paper tray 1.
Replace the main PCB ASSY.
Cause
Set the CR encoder strip into place.
Remove foreign materials.
Remove foreign materials.
Replace the carriage motor ASSY.
Replace the maintenance unit.
Replace the main PCB ASSY.
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LCD
Solution
LCD
LCD
Solution
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