If you Google the keyword, you will be flooded with results: dubious file-hosting sites, sketchy forums requiring registration, and YouTube comments with broken links.
The Canon Service Mode Tool (often referred to as ST4905 or SST for Service Support Tool) is an official utility developed by Canon for authorized service centers. It is not meant for public distribution, which is why finding a legitimate source is difficult.
The tool allows technicians to bypass standard user controls and interface directly with the printer’s EEPROM (Electrically Erasable Programmable Read-Only Memory). This grants access to critical functions such as:
For many Canon printers (MG, MP, MX, G series), there are safer, free methods that don't require the leaked service tool:
Alternative approach (using button sequence): canon service mode tool version 1.050 download
The Canon Service Mode Tool Version 1.050 is a legendary piece of repair software—incredibly useful, but surrounded by malware risks and legal grey areas. It can save a $200 printer with a $0.50 EEPROM reset, but it can also brick your device if you change the wrong setting (e.g., clearing the printer’s unique ID).
Final Recommendations:
If you manage to obtain a clean copy, version 1.050 remains the gold standard for DIY Canon printer repair—just handle it with the respect (and caution) it deserves.
Have you successfully used version 1.050? Share your model and experience in the comments at your favorite repair forum. If you Google the keyword, you will be
This article is for educational purposes. The author does not host or distribute copyrighted Canon software.
Because this is "underground" software, it carries significant risks. Files labeled as Service_Tool_v1050.exe or .zip archives often disguise malware, trojans, or adware. If you download one of these files, it is imperative that you:
A truly clean Canon Service Mode Tool v1.050 has these characteristics:
Recommended safe sources (in order of trust): The Canon Service Mode Tool Version 1
Note: I cannot provide a direct download link here due to copyright and security liabilities, but the technical data above will help you vet any file you find.
To understand the tool, you first need to understand how Canon printers manage maintenance.
Inside every Canon inkjet printer is a component known as the Ink Absorber Pad. During printing and cleaning cycles, the printer spits excess ink into these pads to prevent messes. The printer firmware keeps a digital counter of how much ink has been purged. When the counter hits a pre-set limit, the printer stops working and displays an error (usually regarding the waste ink absorber being full).
The Canon Service Mode Tool (often referred to as a "Resetter") is a utility designed to access the printer's service mode. Its primary functions include:
This is the most overlooked aspect of using the Service Mode Tool.
If your printer said the ink absorber was full, it is because the physical pads inside the printer are likely saturated with wet ink. The