Epson Stylus C50 Service Manual page 36

EPSON Stylus C50/C60/C61/C62
Following explains the basic components for the Printhead.
PZT
PZT is an abbreviation of Piezo Electric Element. Based on the drive waveform
generated on the Main board, the PZT selected by the nozzle selector IC on the
Printhead pushes the top of the ink cavity, which has ink stored, to eject the ink
from each nozzle on the nozzle plate.
Electric poles for CSIC
This electric poles connects the CSIC chip mounted on the ink cartridge. By using
this poles, current ink consumption amount data is red out from the CSIC chip.
And, the latest ink consumption amount data is written into the CSIC chip.
Nozzle Plate
The plate with nozzle holes on the Printhead surface is called Nozzle Plate.
Filter
When the ink cartridge is installed, if any dirt or dust around the cartridge needle is
absorbed into the Printhead, there is a great possibility of causing nozzle clog and
disturbance of ink flow, and alignment failure and dot missing finally. To prevent
this problem, a filter is set under the cartridge needle.
Ink Cavity
The ink absorbed from the ink cartridge goes through the filter and then is stored
temporarily in this tank called "ink cavity" until PZT is driven.
Operating Principles
Nozzle plate
Figure 2-4. Printhead sectional drawing
Overview
CSIC chip
Nozzle selector board
Ink cartridge
Needle Elect ric poles for CSIC
* Head ID for the Printhead
is stored to the EEPROM.
Filter
Cavity
PZT
Revision C
28