Brother MFC 5490CN - Color Inkjet - All-in-One, Service Manual

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6-53
Confidential
Head/carriage unit and CR timing belt
Note: During the removal or installation of the head/carriage unit, take care not to contaminate
the PF encoder disk with ink or grease.
(17) While pressing the idle pulley holder to the right, remove the CR timing belt from the
carriage motor pulley and idle pulley.
(18) Move the head/carriage unit to the left end of its travel by hand.
(19) Lift the head/carriage unit (with the CR timing belt) up and off the engine unit in the
direction of the arrow shown below.
(20) Remove the CR timing belt from the head/carriage unit.
Note: Do not touch the head nozzles (the printing ends) or ink supply ports (to which ink
supply tubes are connected) of the head/carriage unit; doing so will not only stain your
hands with ink but also damage the nozzles and supply ports. If you do touch them though,
clean them with a special-purpose cleaning stick and liquid.
Assembling Notes:
• When handling the head/carriage unit, put on a grounding wrist band and perform the job
on a static mat. Also take care not to touch the conductor sections on the flat cables.
• When replacing the CR timing belt, insert it fully into the slit provided in the head/
carriage unit.
CR timing belt
Carriage motor pulley
(Front)
CR support chassis
Idle pulley spring
Idle pulley holder
Idle pulley
Cutouts
CR guide rail
PF encoder
disk
(6_62)
When mounting a new head/carriage
unit, apply grease to the CR support
chassis (8 lubrication points).
When mounting a new
head/carriage unit, apply
grease here.
When mounting a new head/carriage
unit, apply grease to the front and rear
sides of the upright rear edge of the CR
support chassis (11 x 2 lubrication points).
When mounting a new
head/carriage unit, apply
grease to the CR guide rail
(8 lubrication points).