31-01MS431dn

Lexmark MS431dn error 31-01: Paper Jam Guide

The Lexmark MS431dn error 31-01 is a common indicator that paper has become jammed in the input tray. Users often ask why does my Lexmark MS431dn show error 31-01, usually due to misaligned paper guides. Clearing this error 31-01 involves checking the paper path and ensuring the tray is correctly adjusted to the paper size.

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Common causes

  • 1Improperly adjusted paper guides causing skewed input.
  • 2High humidity making paper stick together.
  • 3Worn-out feed rollers failing to grip.
  • 4Foreign objects or paper dust build-up.

Solutions

Diagnóstico rápido

This error occurs when the paper sensor does not detect the paper being pulled into the engine. Check for visible paper debris near the entrance of the printer.

Solución paso a paso

  1. Remove tray: Pull out the paper tray completely.
  2. Clear jam: Inspect the internal area for stuck pages and remove them carefully.
  3. Visual check: Ensure no paper bits remain near the sensor.
  4. Reload paper: Adjust the side guides to fit your paper stack perfectly.

Prevención y mantenimiento

Clean the feed rollers with a moist cloth. Ensure the tray is not overloaded above the maximum fill line.

Cuándo llamar a un técnico

If the error persists without any paper obstruction, the paper sensor might be faulty and require professional inspection.

Ficha técnica del equipo

  • Technology: Monochrome laser
  • Capacity: 250-sheet tray
  • Grammage: 60-120 g/m²
  • Consumables: MS431 toner series
  • Maintenance: Roller cleaning every 20k pages
  • Official drivers / firmware

Steps to follow

  1. 1

    Remove tray

    Pull the main paper tray completely out of the printer.

  2. 2

    Clear jam

    Locate the paper and carefully pull it out without tearing.

  3. 3

    Reinstall

    Check the guides and reinsert the tray properly.

Frequently asked questions

This code means a sheet of paper is stuck in the input tray area, preventing the printer from moving it into the print engine.

Yes, the printer locks itself until the sensors confirm the path is clear.

Yes, using high-quality 80gsm paper reduces the likelihood of picking jams significantly.

Adjust the tray side guides correctly and wipe the rollers every few months.