Rewrites firmware identifiers (strictly for advanced technicians). Supported Canon Printer Models

user wants a long article about "Canon Service Tool V.3900 Download". This likely refers to a service tool used for resetting ink absorber pads or other maintenance functions on Canon printers. I need to provide comprehensive information. I'll follow the search plan. search results show various links. Some seem relevant, like easyfixs.blogspot.com (result 1), which might provide download and usage instructions. Other results include Chinese sites (CSDN, etc.) offering downloads, but their safety is questionable. The official Canon website (result 2) might have service tools, but likely not the specific V.3900 version. I need to gather comprehensive information. I'll open the promising links. easyfixs.blogspot.com page provides detailed information about the service tool, including its functions, supported printers (MG3500 series), and usage instructions. It also mentions error codes and prerequisites. The other Chinese sites offer downloads for newer versions, but their safety is questionable. The "Canon Service Tools and Supported Printers" page provides information on reset methods. I need to cover download sources, risks, safe practices, and usage instructions. I'll also search for "Canon Service Tool V.3900 safe download" and "Canon service tool official". I'll also search for "Canon Service Tool V.3900 error codes". search results provide information on error codes, official sources, and other versions. I'll also search for "Canon Service Tool V.3900 manual" and "Canon Service Tool V.3900 reset tutorial". search results provide some information. I will now write a long article covering: what the Canon Service Tool V.3900 is, why it's used, supported printers, how to download it safely, step-by-step usage guide, error codes and solutions, warnings, and alternatives. I'll cite relevant sources. your Canon printer suddenly stops working and flashes an error code like 5B00 or 1700, you've likely encountered the infamous "Ink Absorber Full" issue. The is a piece of specialized maintenance software designed to resolve this by resetting the printer's internal waste ink counter. This article provides a complete, in-depth guide on what this tool is, how to find it, and exactly how to use it.

: Canon does not officially distribute this software to consumers. It is a proprietary service utility meant for authorized technicians.

: Clears the counter value for the waste ink absorber, allowing the printer to resume operation after a "Service Required" error.

V.3900 allows you to interface with the printer while it is in "Service Mode" to reset this counter back to 0%, unlocking the machine instantly. Key Features of V.3900

Canon Service Tool V.3900 is a software utility developed by Canon Inc. for its printers and multifunction devices. This tool is designed to help technicians and users perform various service and maintenance tasks, including:

The V.3900 version is highly stable and backward-compatible with a wide range of older and mid-generation Canon Pixma series printers. It is especially reliable for the following series: iP2770, iP3600, iP4700, iP4870, iP4970 Pixma MP Series: MP230, MP250, MP280, MP287, MP490, MP495

The printer’s EEPROM mainboard is locked. This happens if you input the wrong button combination too many times or used an incompatible software version. The physical chip must be desoldered and replaced. Crucial Maintenance Warning

: Visit Canon's official website for user manuals, troubleshooting guides, and software/drivers designed for your printer model.