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Theory of Operation 2-15
NovaJet 500/630/700 Series Service Manual
THEORY OF
OPERATION
Carriage Assembly Circuits
CARTRIDGE 1
CARTRIDGE 2
CARTRIDGE 3
CARTRIDGE 4
OPTICAL ENCODER
OPTICAL SENSOR
PAPER SENSOR
CARRIAGE
PWA
TRAILING
CABLE
CONNECTION
FROM
MPWA
TRAILING
CABLE
INKJET
DRIVERS
CARRIAGE ASSEMBLY
Figure 2-11. Carriage Assembly Circuits.
The Carriage Assembly contains:
1) Carriage PWA
2) Optical Sensors
3) Paper Sensor
4) Inkjet Cartridges
The Carriage PWA contains the logic and drive circuitry for the firing of
the inkjet cartridges. It also establishes an interface path for the optical
sensor and paper sensor to communicate with the MPWA.
The optical sensors receive their inputs from the optical encoder strip
and sends this data to the MPWA. The MPWA uses this information to
determine the horizontal position of the carriage assembly so that
accurate printing can be established.