Canon: Service Tool 4905

The (also known as ST4905) is a proprietary, unofficial software application designed to communicate with your Canon printer’s service mode. It is a variant of the popular "Service Tool" series (versions v3400, v3600, v4700, and v4905).

: Users can print or clear the EEPROM (Electrically Erasable Programmable Read-Only Memory), which contains the printer’s internal logs, settings, and historical error data.

: Runs diagnostic patterns to verify print quality and mechanical alignment. canon service tool 4905

No. Service mode only works over USB. Disable Wi-Fi on the printer before starting.

If you bought a Japanese-market Canon printer (often ending with a "J" in the model number), it may reject non-Japanese ink cartridges. The Service Tool 4905 can change the destination code: The (also known as ST4905) is a proprietary,

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

Canon’s official solution is to replace the entire pad (a messy, expensive repair) or buy a new printer. The bypasses this by allowing you to reset the software counter to zero. : Runs diagnostic patterns to verify print quality

Using the wrong version (e.g., v3400 on a TS3300) can brick your printer. Always verify compatibility.