Brother DCP-J552DW Service Manual page 150

(16) Move the head/carriage unit slightly to the right as shown below.
(17) While pressing the idle pulley holder to the right, remove the CR timing belt from the carriage
motor pulley and the idle pulley.
Note When removing the CR timing belt, do not touch the CR encoder strip or the lubrication area
on the engine unit with your hands or with the CR timing belt.
CR encoder strip
CR guide rail
Idle pulley holder
Idle pulley
Head/carriage unit
CR timing belt
Ink supply tubes
Upper cover
Carriage flat cables
CR timing belt
Idle pulley
Carriage motor pulley
Idle pulley holder
Idle pulley spring
(3_040)
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Confidential