Operating Principles
Rev. A
2-
2.2.2 Printing Mechanism
The printing method used for this printer is On-demand ink jet, same as for other EPSON ink jet printers.
However, use of the new type of printhead improves print quality and speed. The printing mechanism has
2 parts: printhead and ink cartridge which is filled with ink.
2.2.2.1 Printhead Structure
The printhead for this printer has the black and color printheads. The structures of the printheads are
basically the same except for the nozzle configuration. The black printhead, used for the black ink only, is
composed of 128 nozzles (32 nozzles for each of 4 rows), while the color printhead, composed of 3
printheads for Magenta, Cyan and Yellow, has 64 nozzles (32 nozzles for each of 2 rows) for each color.
Printhead Driver Circuit Board
To the ink cartridge.
Piezo
Cavity
Nozzle
Nozzle Plate
Figure 2-2. Printhead Structure
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