Brother MFC Series Service Manual page 151

(7) Open the Document scanner unit at around 90 degrees then pull it backwards.
ADF unit*1
Document cover ASSY*2
Document scanning
position sensor
harness*1
Document detection
sensor harness*1
ADF motor harness*1
Document scanner
FG wire
Document scanner
motor harness
ADF FG wire*1
3-43
*1 For models with ADF
*2 For models without ADF
Document scanner unit
CIS flat cable
(3_038L)
Confidential