Many printers allow entering service mode via button sequences (e.g., Stop + Power) without external tools. Follow Canon’s official repair manual.

Leo’s heart dropped. He knew what that meant. Mechanically, the printer was perfectly fine, but an internal digital counter had reached its limit to prevent ink from spilling. The machine was now completely bricked. He could not bypass it. He could not ignore it. Without clearing that counter, the printer refused to lay down a single drop of ink.

The is a specialized utility designed for authorized technicians and advanced users to perform maintenance and diagnostic tasks on Canon PIXMA and G-series printers. Its primary use is resetting internal counters, such as the "Waste Ink Pad" or "Ink Absorber Full" errors (commonly codes 5B00 or 1700), which can otherwise render a printer inoperable. Core Functions and Usage

: Can sometimes be used to reset ink levels or perform deep cleaning cycles that are more thorough than standard driver-based cleanings. How to Use Canon Service Tool V6000