Canon Service Tool 4905 -

Canon Service Tool v4905 is an official service software used to perform maintenance on supported Canon Pixma and MAXIFY inkjet printers. It is primarily utilized by technicians to reset the waste ink absorber counter

While holding Power, release Stop/Resume and press it 5 or 6 times (depending on the model) before releasing both buttons. canon service tool 4905

• Nozzle Check: Prints a pattern to identify clogged nozzles.
• Cleaning (Standard/Deep/System): Executes forced cleaning cycles.
• Ink Charging: Allows for the manual charging of ink lines after replacing cartridges or printheads.

3.2 Printhead Maintenance

The tool offers direct control over the printhead, bypassing the standard driver interface. This includes: Canon Service Tool v4905 is an official service

Ink Level Reset for Refilled Cartridges

For models that use chip-based cartridges (PGI-225/CLI-226, etc.): Nozzle Check: Prints a pattern to identify clogged nozzles

Conclusion

The Canon Service Tool 4905 is a powerful, double-edged sword. In the hands of an informed user, it saves printers from premature obsolescence. In reckless hands, it can brick a perfectly good machine. By following this guide—entering service mode correctly, resetting only the necessary counters, and respecting the physical limits of your ink pads—you can master your Canon printer like a pro technician.