Brother MFC5490CN - Air Vent Unit; Back End; Back End Components and Their Main Roles; Damper Assemblies

3-15
Confidential
 Back end
Back end components and their main roles
- Damper assemblies
Each assembly has two roles: dampening the ink pressure fluctuations* in the ink supply tube
as the carriage moves and collecting air bubbles that grow in the ink flow path.
* Ink pressure fluctuations: As the head/carriage unit travels, inertia means that the ink remains in the
same place, temporarily raising or lowering the pressure in the right chamber.
- Air vent unit
At regular scheduled intervals, this vents any air bubbles that have accumulated in the damper
assemblies. The air vent rods in the maintenance unit push up the shut-off valves, opening the
air vent flow paths.
Damper ASSY (Yellow)
Shut-off valves
Air vent unit
(Air vent cap)
Damper ASSY (Cyan)
Damper ASSY (Black)
Damper ASSY (Magenta)
Right chamber
Right
chamber
Right
chamber
Right
chamber
Left chamber
Left chamber
Left chamber
Left chamber
Air bubbles
Air bubbles
Air bubbles
Air bubbles
(BackEnd_E)
(Air vent rods)
(A part of maintenance unit)