Click at the top to print a test page confirming the D= value (which tracks waste ink) is now D=000.0 . Step 3: Exiting Service Mode

The Service Tool (typically version or V4720 for this model) is an engineering-level software that communicates directly with the printer's EEPROM. It allows you to:

The "Canon Service Tool" (also known as a "reset tool" or "adjustment program") is an unofficial, third-party software utility. It is produced or endorsed by Canon, who does not provide this tool publicly. Instead, it is developed by independent programmers who have reverse-engineered the communication protocol between the printer's firmware and a computer.

Right-click the file and select Run as Administrator .

When this happens, your printer will lock up and refuse to print. This guide provides a comprehensive look at the , explaining what it is, how to use it safely, and how to reset your printer to full functionality. Understanding the 5B00 Error and Waste Ink Pads