Brother DCP-J552DW Service Manual page 203

(7) Press down the lock arm boss part of the registration sensor holder where the registration sensor
PCB ASSY is set, remove it from the CR guide rail, then remove the registration sensor holder
outward.
Pull the support arms on the registration sensor holder outwards, remove the registration sensor
PCB ASSY, and disconnect the registration sensor harness from the PCB as shown below.
Note The registration sensor harness is the assembly part (PF/registration sensor harness ASSY)
that is connected to the PF encoder sensor harness. When completely separating it from the engine
unit, refer to Step (11) to disconnect the PF encoder sensor harness from the PF encoder sensor PCB.
Registration sensor holder
Registration sensor holder
Registration sensor harness
Support
arm
Registration sensor harness
(a part of the PF/registration sensor
harness ASSY)
Cable guide
3-86
Registration sensor PCB ASSY
(3_112)
Confidential