: Performing advanced print head cleaning and testing. 2. Entering Service Mode
The Service Tool v4502 is part of a series of proprietary service programs (originally called "General Tool") intended only for authorized Canon technicians. These tools leaked onto "closed" forums and Russian tech sites, becoming legendary in the DIY repair community.
Resets the internal counter to "0" after you have cleaned or replaced the physical ink pads.
: For standard drivers and consumer software, always use the Official Canon Support Page .