Brother MFC 5890CN - Color Inkjet - All-in-One, Service Manual

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Confidential
[ 2 ] Ink-related problems
Problems of this nature may arise not only due to machine malfunction but also to the user's
actions.
IMPORTANT: In many cases, the user fails to set ink cartridges in place.
Problems due to the user's actions
Problems due to machine malfunction
Check Possible causes Problems that may result
Ink cartridges - Ink cartridges are not inserted fully
into the ink refill ASSY.
- One or more of the ink cartridges are
not loaded.
- One or more of the ink cartridges has
run out of ink.
The machine will not be able to
print.
Check Possible causes Problems that may result
Head/carriage unit - Air bubbles, high viscosity ink, or
foreign materials have found their
way into the head/carriage unit.
- Head flat cables are broken.
- The carriage-head flat cable has not
been inserted into the carriage PCB.
Dot missing occurs on the
printout.
The machine will not be able to
print or drive the head/carriage
unit.
Maintenance unit - Air bubbles, high viscosity ink, or
foreign materials get into the
maintenance unit.
- Torque not transmitted.
- Drain tube bent or pinched.
Head cleaning operation will not
be possible and/or the
maintenance unit will not work.
FB unit The CIS unit is weak in identifying
colors. The quality of print colors in
copying operation will be low.