However, for out-of-warranty printers, most jurisdictions (including the US and EU) allow “right to repair.” Using a resetter on your own property is legal, though Epson may refuse future repairs.
It is most commonly sought after to resolve the "Service Required" error, which renders the printer unusable until addressed. Resetter-printer-epson-l5190-adjustment-program
Beyond resetting the waste ink counter, the Adjustment Program allows technicians to perform advanced diagnostics, including: for out-of-warranty printers