Because this is not a standard consumer driver, it is not available on Canon’s official support site . You can typically find it through:
：Service Tool 无法通过无线网络连接工作，必须使用 USB 线将打印机直接连接到电脑。
Provide a to V3900 if your model is newer. Suggest safe, reputable sources for printer software. Let me know what you'd like to do! Share public link
In this post, we cover what this tool does, which printers it supports, and how to use it safely.
严格来说，Canon Service Tool（CST）是佳能官方为授权维修中心和服务工程师提供的专业级维修软件，并非面向普通消费者公开发布的工具。
：这是最大的安全隐患。第三方网站的文件可能被恶意篡改，捆绑病毒、木马、广告软件或勒索软件。一些看似正常的“清零软件”可能在后台窃取你的个人信息。
使用 Service Tool 时可能出现以下错误提示：
The service tool is often a one-time purchase or download. Make sure to follow instructions carefully to avoid "locking" the tool.
这是佳能官方发布的免费打印机维护工具，可以在佳能官网直接下载。它虽然没有 Service Tool 的底层清零功能，但涵盖了墨水余量监控、打印头清洗与对齐、固件更新、打印机设置等日常维护功能。绝大多数用户平时用这个工具就够了。
Wait for a confirmation message before turning the printer off and then back on. Important Considerations
Because these files are unofficial, numerous forums and software archive sites issue the same warning: , as some tools may be flagged as malicious (false positives are common for executable files that alter system counters).
Canon Service Tool V3900 is a specialized utility software used by Canon printer technicians and advanced users. It is not designed for the average home user. Its primary functions include:
如果打印机长时间未使用导致打印质量下降，Service Tool 可以对打印头进行深度清洁，恢复正常的输出质量。
None. This is a diagnostic tool. It does not stream movies, offer recipes, provide travel tips, or enhance your lifestyle. If a website promises this tool under the "Lifestyle & Entertainment" category, it is a major red flag.