Service Tool V3400.zip -

Resetting the counter does not actually clean the ink pads. Continued use without replacing or washing the physical absorbers can lead to ink leaking onto your desk.

Adjusts the printer's region settings if the logic board has been replaced. Compatibility and Requirements Service tool v3400.zip

Using V3400 on newer printer models (like MG3520 or G-series) can permanently lock the printer's service mode, requiring a logic board replacement or EEPROM flashing to fix. Resetting the counter does not actually clean the ink pads