Brother MFC-J3520 Service Manual page 92

Paper jam around the platen

User Check
- Check that recording paper is loaded correctly in the paper tray.
- Adjust the paper guide to match the recording paper size.
- Check that the paper shorter than the specified size is not loaded.
- Check thickness of recording paper is within tolerance of each type.
- Clean the related rollers.
Step
1 Foreign materials in the
recording paper path
2 CR encoder strip stained
3 CR encoder strip defective
4 Platen foam drift
5 Bank ASSY out of place
6 Head/carriage unit head
unlocked
7 Switchback inner paper guide
not mounted in place
8 Switchback outer paper guide
not mounted in place
9 Switchback roller belt out of
place
10 Paper eject roller belt out of
place
11 CR guide rail not mounted in
place
12 Platen not mounted in place
13 Platen spring not mounted in
place
14 Inner chute ASSY not mounted
in place
15 Inner chute ASSY broken
16 DX paper guide ASSY not
mounted in place
17 Platen damaged, broken
18 Registration sensor PCB
defective
19 Main PCB defective
Cause
Remove foreign materials.
Clean the CR encoder strip.
Replace the CR encoder strip.
Set the platen foam into place.
Set the bank ASSY into place.
Set the head lock in lock position.
Set the switchback inner paper guide into place.
Set the switchback outer paper guide into place.
Set the switchback roller belt into place.
Set the paper eject roller belt into place.
Set the CR guide rail into place.
Set the platen into place.
Set the platen spring into place.
Set the inner chute ASSY into place.
Replace the inner chute ASSY.
Set the DX paper guide ASSY into place.
Replace the platen.
Replace the registration sensor PCB ASSY.
Replace the main PCB ASSY.
2-58
Solution
Confidential