When a main board fails and is replaced with a new or used board, the printer effectively loses its "identity." Without migrating the original EEPROM data, the printer may display errors such as "Ink Cartridge Not Recognized," fail to initialize the print head, or display incorrect ink levels. "EEPROM data copy" is the forensic process of retrieving this data from a failed board (if readable) or generating compatible data based on hardware labels, and writing it to the replacement board.
An Epson 24C02 holds 256 bytes. A 24C16 holds 2KB. Copying a 2KB file to a 24C02 will truncate data, bricking the printer. Always check the chip marking before reading. Use the “Auto Detect” function in your programmer. eeprom data copy epson best