Brother MFC-J3520 Service Manual page 238

(2) Hold the section "A" and remove the Paper ejection roller and Platen.
Assembling Note: Mount the paper ejection roller with its bushing lever tilted forward
Correct
<Front>
"A"
2a
Paper ejection
roller
Assembling Note: Platen springs should not be bent or turned over.
as shown below.
Platen
<Rear>
Paper ejection roller
Fig. 3-141
Correct
Fig. 3-142
3-118
Wrong
<Front>
Paper ejection roller
Platen
2b
Wrong
Platen
<Rear>
"A"
Confidential