Adjustment Program Epson L3210
In the adjustment program, functions like "EEPROM initialization" or "Factory Defaults" can wipe unique calibration data for your specific printer. After that, banding may appear permanently, or the printer may refuse to recognize ink cartridges.
Using the voids your warranty if your printer is still covered. Epson explicitly states that service tools are for authorized technicians only. Adjustment Program Epson L3210
Epson Adjustment Program Activation and Reset Tutorial for Epson Printers In the adjustment program
Allows for "Bi-D Adjustment" (bidirectional alignment) and "Top Margin Adjustment" to fix alignment issues. banding may appear permanently