When Canon iP4940 triggers an ink absorber full condition, the printer may block printing as a protective measure. The solution is typically a waste ink counter reset.

During head cleaning, surplus ink is routed to internal absorber pads. Canon iP4940 monitors this via a counter and can lock printing at a threshold.

This page is prepared for Canon iP4940. Service mode instructions are shown only when a matching series procedure is known.

Common Symptoms

• ‘Ink Absorber Full’ / ‘Service Required’ message
• Support/service code (varies by series)
• Printing blocked after cleaning cycles
• Reset required to continue printing

Clear the Ink Absorber / Waste Ink Counter

Once the counter is cleared, Canon iP4940 should exit the locked state and printing should resume normally.

Warnings

Treat the reset as a maintenance step. If your printer has extremely high usage, consider cleaning/replacing absorber pads to avoid overflow.

Reset tools and instructions

Use a reliable USB connection and follow the steps in order.

Troubleshooting

• Power-cycle the printer and try again.
• Repeat the service mode steps carefully (timing matters).
• Use the correct Stop/Reset press count for your series.
• Try a different USB cable/port if using PC software.
• Close other Canon printer utilities while resetting.