Engine Unit And Flushing Box - Brother MFC5890CN Service Manual

6.1.13 Engine Unit and Flushing Box

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 replace all
four ink cartridges with the protective part (see
(1) If the MJ/PS shield unit has not been removed, you need to remove screw "f" shown on
page 6-39.
(2) Remove the screw from the rear of the engine unit.
(3) Take the carriage motor harness, ASF motor harness, purge cam switch harness, and cap
lift cam switch harness out of the harness guides provided on the lower cover.
ASF motor harness
Carriage motor
harness
Lower cover
Cap lift cam switch harness
Purge cam switch harness
ASF encoder harness
ASF encoder harness
Cap lift cam
switch harness
Purge cam
switch harness
Assembling Note: If you replace the engine unit, make adjustments specified in
Section 7.2.
Assembling Note: When routing the cap lift cam switch harness, first check that it passes
through the cable guide on the maintenance unit and then pass it under the 2nd cable guide (on
the lower cover) counted from the rear, pulling it with your fingers as shown above.
After routing the harness, make sure that there is no slack in the harness. If slacked, the harness
interferes with the planet gear on the maintenance unit, causing MACHINE ERROR 50.
Carriage motor harness
Note: When routing the cap lift cam
switch harness on the lower cover,
pass it under the 2nd cable guide counted
from the rear without any slack, pulling it
with your fingers.
page 6-3).
ASF motor harness
6-58
Taptite, cup B
M3x12
Ferrite cores
Cable guide
(on the maintenance
unit)
Cable guide
(on the lower cover)
(6_67_BHL9_A3_E)
Cap lift cam
switch harness
Chapter 7,
Confidential