4 Remove the two screws (B), and then remove the fan.
B
B
Controller board removal
MX421, MX521, and MX522 controller board
1 Remove the right cover. See “Right cover removal” on page 223.
2 Remove the scanner rear covers. See “Scanner rear covers removal” on page 272.
3 Remove the rear cover. See “Rear door and cover removal” on page 273.
7017-2xx, -4xx, -6xx
Parts removal
230