A: Theoretically unlimited. However, Epson EEPROMs have a finite write cycle (approx. 100,000 writes). You will never reach that limit in normal use.
After successfully resetting your printer, create a backup of your EEPROM data using the adjustment program (there’s usually a “Backup” tab). If something goes wrong in the future, you can restore it. And always keep a copy of the reset tool on a USB drive or cloud storage—finding it again years later can be surprisingly difficult. epson l5190 adjustment program reset tool
A: Indirectly. If the error locked the printer, resetting restores function. But faded prints require a separate head cleaning or nozzle check. A: Theoretically unlimited