Operating Principles
PRINTER MECHANISM OPERATING PRINCIPLES
Printing Operation Principles
This printer mechanism uses a drop-on-demand ink jet system similar to the one used on all other
EPSON ink jet printers. However, the printhead in this system has been completely redesigned to
make it more compact and to ensure a high level of reliability. The printer has two printheads:
monochrome (black ink) and color (yellow, cyan, and magenta ink).
Monochrome Printhead
The figure below shows the structure of the monochrome printhead, which consists of the nozzle,
nozzle plate, piezo elements, cavities, and printhead driver board.
Color Printhead
The figure below shows the structure of the color printhead. Its structure is different from the
monochrome printhead. The color printhead consists of the nozzle plates, two rows of nozzles,
piezo elements, and cavities for each of the three colors.
For Ink Cartridge
Piezo
Printhead Driver Board
Nozzle
Nozzle Plate
Cavity
Figure 2-1. Black Printhead Structure
For Cartridge
Printhead Driver Board
Nozzle
Nozzle Plate
Piezo
Cavity
Figure 2-2. Color Printhead Structure
Operating Principles
EPSON Stylus 1500 Service Manual 2-3
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