Epson ME100, Service Manual

Page: 44 / 135

EPSON Stylus CX1500/ME100 Revision A
OPERATING PRINCIPLES Overview 44
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Timer Cleaning
Like the previous SPC (Stylus CX3500/CX3600/CX3650), this printer dose not
have Timer IC and Lithium battery which is used for the backup power source for
Timer IC. So, this printer manages the printer off period or cleaning cycle by using
the following method.
The Printer Driver sends the timer command to the printer before printing. The
timer command is generated based on the PC’s timer and it consists of year, month
date, hour, minute and second. As soon as the printer receives the timer command
from the Printer Driver, the printer stores its command in the EEPROM. Then, it is
compared with the latest CL time which is stored in the EEPROM. And, in case
that the timer cleaning period is over the specific period, the printer performs the
timer cleaning automatically. In this time, the printer stores the timer command in
the EEPROM.
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Flashing
Two different flushing operations are executed for the following reasons.
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Pre-printing flushing
This is done before a start of printing to eliminate ink viscosity in the Print
Head nozzles.
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Periodic flushing
This is done during printing to prevent ink viscosity in the Print Head nozzles
from increasing.