Printing Mechanism - Brother MFC4820C Service Manual

4.2.3 Printing mechanism

The printing mechanism consists of the "ink supply and ink jet mechanism," "head capping
mechanism," "purge mechanism" and "carriage drive mechanism." The former two are driven by
the air pump motor and purge motor and the latter two by the carriage motor.
The ink supply and ink jet mechanism uses ink cartridge sensors. The purge mechanism uses a
purge cam HP switch. For details on these sensors, refer to Section 4.2.4.
Air pump motor
Ink cartridges
Ink cartridge sensors
CR encoder sensor
Carriage rail
Carriage
Print head PCB
Needle ASSYs
(Paper ejection roller)
4 -1 1
Carriage motor
Print head unit
Platen
Star wheels
Purge motor