Brother DCP-J552DW Service Manual page 155

4) Fit the front end of the head/carriage unit first over the CR frame and then set the rear end
onto the CR guide rail.
Make sure that one point (see figure below) on the front side of the head/carriage unit bottom
is firmly hooked to the front end of the CR frame and that the bosses of the bottom rear side
are properly fitted into the two notches of the CR guide rail (refer to
5) Set the LR (Leveler Roller) fitting jig on the head/carriage unit vertically and then tilt it
towards you, as shown below. This pushes the leveler roller ASSY backwards and upwards,
fitting it over the head/carriage unit.
Ink supply tubes
Carriage flat cable
Head flat cable
6) Slide the head/carriage unit by hand to check if it moves smoothly. If it does not move
smoothly, the leveler roller ASSY is not fit properly into the head/carriage unit. Go back to
Step 5.
Bottom view
Bottom rear side bosses
Hook
LR (Leveler Roller) fitting jig
Leveler roller ASSY
Head/carriage unit
Upper cover
3-38
page 3-35).
LR (Leveler Roller) fitting jig
Leveler roller ASSY
Confidential
(3_047)
(3_048)