31.02MX431adn

Lexmark MX431adn 31.02 Error: Tray Jam

The Lexmark MX431adn error 31.02 is a warning that the printer failed to feed paper from the primary input tray. This happens when the pickup rollers lose traction, often due to a thin coating of dust or because the paper stack is improperly loaded. To resolve this error, clear any stuck scraps and wipe the rollers clean. As a fast-paced workhorse, the MX431adn benefits significantly from simple periodic maintenance of its feed consumables.

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Common causes

  • 1Worn or dusty rubber pickup rollers.
  • 2Overloaded or misaligned paper stack.
  • 3Damp paper causing sheets to stick.
  • 4Obstruction in the tray sensor pathway.

Solutions

Diagnóstico rápido

If you hear the pickup motor engaging but the paper doesn't move, your feed rollers are slipping or there is an obstruction in the tray.

Solución paso a paso

  1. Remove tray: Extract the main input tray fully.
  2. Inspect: Search for any torn paper scraps in the pickup zone.
  3. Clean: Wipe the rubber feed rollers with a damp cloth.
  4. Adjust: Realign the paper stack and ensure the side guides are against the edges.

Prevención y mantenimiento

Always fan the paper before loading and avoid using media in high-humidity conditions to prevent feeding issues.

Cuándo llamar a un técnico

If the rollers are clean and paper is properly aligned but the error repeats, the pickup motor or feed sensor likely requires professional attention.

Ficha técnica del equipo

  • Technology: Multifunction Laser
  • Speed: Up to 42 ppm
  • Capacity: 250-sheet standard tray
  • Consumables: MX431 series toner
  • Usage: High-traffic office
  • Official firmware / drivers

Steps to follow

  1. 1

    Remove tray

    Pull out the main paper tray completely.

  2. 2

    Inspect

    Check for jammed scraps near the pickup rollers.

  3. 3

    Adjust

    Align the paper stack and reinsert the tray.

Frequently asked questions

The 31.02 error means the paper could not be picked up properly from the main input tray.

Yes, rollers coated in paper dust will slip, causing feed failures.

Yes, moist paper sticks together, preventing the rollers from grabbing individual sheets.

Keep tray guides snug and never exceed the maximum fill line for your tray.