Canon Service Tool V.3900 Download ~upd~ Jun 2026

Allows you to read, dump, and clear the printer’s non-volatile memory data.

Turn off the printer (but leave it plugged into power and connected to your PC via USB). Press and hold the button (red triangle). Press and hold the Power button. Canon Service Tool V.3900 Download

: Connect the printer to a PC via USB (Wireless/Network mode will not work for this tool). Button Sequence : Turn off the printer (keep it plugged in). Allows you to read, dump, and clear the