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

Page: 195 / 439

6-45
Confidential
6.1.11 Head/Carriage Unit and Ink Refill ASSY
During disassembly jobs, except when removing the ink refill ASSY or engine unit (including
the maintenance unit), leave the head/carriage unit in the machine.
Before removing the head/carriage unit, ink refill ASSY or engine unit, you need to remove all
four ink cartridges and set the protective part instead (see
page 6-3 ). Be sure to insert the
protective part into place to prevent ink remaining in the ink supply tubes from leaking and the
machine from getting stained with leaked ink. (Check that the small tabs on both sides of the
protective part fit in the holes provided in the ink refill ASSY.)
Note: Make sure that the power cord is unplugged from the electrical outlet.
Note: When replacing 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.
Note: During the removal or installation job for the head/carriage unit, take care not to
contaminate the CR encoder strip, PF encoder disk, or ASF encoder disk (in the ASF motor
unit) with ink or grease.
Note: If you replace the head/carriage unit, also replace the ink cartridges. This is because
sufficient ink volume is necessary for refilling the ink supply tubes after replacement of the
head/carriage unit.
CR encoder strip
(1) While lightly pushing the CR encoder strip support on the left end of the engine unit
inwards, unhook the right end of the CR encoder strip from the hook (
c
). (See the
illustration on the next page.)
(2) Slide the CR encoder strip to the left (
d
) and out of the head cover. At the left end of the
CR encoder strip, align the rectangular hole in the strip with the boss of the strip support
(
e
) and take the strip off.
Note: Take care not to scratch or damage the encoder strip. If it is stained or damaged,
replace it with a new one.