Canon Service Tool V4720 ((link)) Download -

Электроника и проектирование.
Тесты и обзоры электронных средств, инструментов, оборудования

Run the V4720 software on a Windows PC connected via USB (Wi-Fi will not work). Important Warnings Risk of "Brick"

: Calibrates the print head for better quality.

Simply resetting the software counter does not clean the physical ink pads. If the pads are actually full, continuing to print can cause a nasty ink leak inside your machine. Brother USA Manual Reset Alternatives

Information on (like V5204) if V4720 isn't working for you.