Ink Sequence; Cap Unit; Capping Mechanism - Epson Stylus Photo R1800 Service Manual

EPSON Stylus Photo R1800/R2400

2.2.5.3 Cap Unit

The Cap Unit is designed to make airtight in the Cap sticking fast to the Print
Head surface so that ink suction can be performed by the driving force of the
Pump Unit.
When the printer is in a standby status or its power is OFF, the Cap Unit
prevents the ink from thickening.
The following figures shows the Cap Unit operation.
Carriage Unit
Print Head
Figure 2-11. Capping Mechanism
Operating Principles
Cap
Slider cap rises to perform
capping.

2.2.6 Ink Sequence

The following ink sequence is executed according to various timer, counter,
flag and other information saved on the EEPROM.
CSIC-related sequence
The ink type code stored in the CSIC Memory Chip is saved in the Main
Board EEPROM. At power-on, data is read from each color CSIC and the
CSIC data status becomes valid. If the data read from each CSIC has any
problem, No Ink Cartridge, CSIC Error or Ink Out will be displayed.
After CSIC operation is checked, the ink consumption of the I/C currently
installed per color is compared with the ink consumption saved in the
printer EEPROM, and control is performed under the following conditions.
When the current ink consumption data differs between the Ink
Cartridge and the EEPROM
1. The printer judges that the Ink Cartridge was replaced while the
printer was turned off. Then it resets the 1st I/C flag in the
EEPROM.
2. The printer updates the number of times the CSIC is installed.
3. After incrementing the counter of I/C replacement, the printer
reads the ink consumption data from the CSIC to write it over the
existing data in the EEPROM following the CSIC data replacement
sequence.
4. The printer model name data on the CSIC is rewritten.
Note:The reason why the model name data is rewritten from the printer
to the CSIC is to know for which model was the I/C used at the
time of collecting used I/Cs.
5. The replacement flag 2 (flag that indicates CL after Replacement)
is set and the CL is executed.
Printer Mechanism
Revision B
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