Brother MFC620CN Service Manual page 151

(8) Open the scanner cover at approx. 80° and pull it to the left and off the machine.
NOTE: When replacing the scanner cover, remove the ferrite core from the CIS motor harness
of the old scanner cover and set it to that of the new scanner cover. Wind the CIS motor
harness round the ferrite core by one turn.
Ferrite core
CIS motor harness
Panel-main harness
CIS flat cable
Flat core
(9) As shown below, remove the scanner cover damper from the scanner cover stopper.
Scanner cover damper
Scanner cover
(Scanner unit)
Scanner cover stopper
5-13
Confidential