Epson 2200 Service Manual - Page 60

EPSON Stylus PHOTO 2100/2200 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 1 code stored in the CSIC memory chip is identical regardless of the Japanese domestic or overseas cartridges, and is saved at the main board EEPROM A0 - A7. If data is read from each color CSIC and Ink cartridge error is not displayed at power-on, Ink end error is displayed. If the read data have no problems, the CSIC data status is made valid. 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 current I/C consumption differs (from ink consumption in EEPROM) 1. On the assumption that the I/C has been changed at power-off, the first I/C flag is reset. 2. The installation count in the printer EEPROM is updated for the CSIC. In the CSIC information replacement sequence, the CSIC side ink consumption data is updated to the ink consumption data in the printer EEPROM. 3. The used model name data on the I/C side is rewritten. Note: Reason why the used model name data is rewritten from the printer to the I/C: To grasp which printer used the I/C removed. 4. After that, the change flag 2 (flag that indicates change CL) is set and CL is executed. If the ink set (Line A, Line B) of the current I/C differs from the ink set in the EEPROM, replacement CL3 is executed. Revision B " When current I/C consumption is the same (as ink consumption in EEPROM) 1. When the initial filling flag is set and the CSIC side ink consumption is 0, the printer judges that initial filling is not yet performed. (The printer before initial filling judges that the I/C is fitted in a power-off status.) 2. Installation count updating, CSIC information replacement, and initial filling are executed in this order. 3. If the initial filling flag is not set, the printer judges that I/C change was not made at power-off and regards the CSIC data as valid. Data is written to the CSIC at power-off, in the power saving mode, at the time of cartridge change, or at the time of cleaning. 1. Data is read from the CSIC and developed in the RAM on the main board. 2. The data is compared with the ink consumption in the printer EEPROM. If the data are the same, the data is written to the CSIC. If they are different, only the consumed difference is added and written to the CSIC. When cleaning is performed, the CL count is also written, and when the I/C is changed, the installation count is also written. OPERATING PRINCIPLES Printer Mechanism 60