You cannot run the adjustment program while the printer is in normal mode. Follow this exactly:
The reset process usually takes less than 5 minutes. Epson L1250 Adjustment Program
The is an official (but typically hidden) service utility designed by Epson for authorized service centers. Unlike the standard printer driver, this program allows technicians—and advanced users—to access the printer’s internal firmware, reset counters, and perform hardware calibrations that are not available through the normal control panel. You cannot run the adjustment program while the