Canon iPF671 Service Manual page 164

Chapter 4
3) Remove ten screws [1], and then remove the rear cover [2].
4) Disconnect the connector [1].
5) Remove two screws [1], and then remove the maintenance cartridge holder unit [2].
4-28
[1]
[1]
F-4-62
[1]
F-4-63
[1]
[2]
F-4-64
[2] [1]