Never use an L120 or L3110 resetter on an L121. Using the wrong firmware tool can "brick" your printer (make it permanently unusable). Conclusion
Your printer should now show a green light, and the "Service Required" error should be gone! Important Safety Tips
Many antivirus programs flag adjustment tools as "False Positives." You may need to temporarily disable your protection to run the exe file.
Forces ink through the tubes—useful after long periods of inactivity. How to Use the Epson L121 Adjustment Program (Step-by-Step)
Download the Epson L121 Adjustment Program from a trusted source and extract the ZIP file. Run the App: Open the folder and run AdjProg.exe .
Inside your Epson L121, there are physical sponges called waste ink pads. These catch excess ink during head cleaning and printing. The printer has a built-in counter that estimates when these pads are full. Once that counter reaches 100%, the printer locks itself to prevent ink from overflowing and damaging the internal hardware.
The Epson Adjustment Program (also known as the "AdjProg" or "Epson Resetter") is a specialized utility tool designed for servicing and maintenance. Its primary function is to communicate with the printer’s firmware to reset the . Why Does Your Printer Stop Working?
