31.02MS521dn

Lexmark MS521dn Error 31.02 Fix

The Lexmark MS521dn error 31.02 refers to a paper jam occurring in the imaging unit vicinity. This jam usually occurs when the paper path is compromised or the stock is improperly fed. Because this machine is very high-speed, clearing small paper scraps is vital to stop the error from recurring immediately upon power-on. Routine inspection of the paper path is highly effective for this error.

1 views

Common causes

  • 1Curled paper: Moisture in paper storage causes sheets to fold.
  • 2Torn scraps: Pieces of a previous jam blocking a sensor.
  • 3Poor alignment: Paper guide settings are loose.
  • 4Foreign objects: Clips or staples entering the paper path.

Solutions

Diagnóstico rápido

Error 31.02 is usually accompanied by a clear mechanical stall. Because it is located near the imaging unit, it is quite easy to see the issue upon opening the front door.

Solución paso a paso

  1. Open door: Open the front cover and pull out the toner and imaging unit.
  2. Find paper: Look for paper trapped in the feed path below the toner cartridge.
  3. Remove obstruction: Pull the paper out carefully in the direction of the paper path.
  4. Check rollers: Check for any small paper scraps before reinserting the cartridge.

Prevención y mantenimiento

Ensure your paper guides match the paper size exactly. Store paper in a dry environment, as humidity is the leading cause of paper curls that trigger these specific jams.

Cuándo llamar a un técnico

If the jam persists after clearing all debris or if the printer sounds like it's grinding metal, you may have damaged the imaging unit housing or rollers.

Ficha técnica del equipo

  • Technology: Monochrome Laser
  • Print Speed: 44 ppm
  • Connectivity: USB, Gigabit Ethernet
  • Input: 350 sheets (expandable)
  • Consumable: 52B / 52D series
  • Usage: Mid-sized workgroups
  • Official Drivers / Firmware

Steps to follow

  1. 1

    Open door

    Open the front cover and pull out the toner and imaging unit.

  2. 2

    Find paper

    Look for paper trapped in the feed path below the toner cartridge.

  3. 3

    Remove obstruction

    Pull the paper out carefully in the direction of the paper path.

  4. 4

    Check rollers

    Check for any small paper scraps before reinserting the cartridge.

Frequently asked questions

It signifies a paper jam located in the imaging unit or fuser area.

No, remove it gently. Hard tugs can damage internal guide plates or sensors.

Yes, moist paper curls easily and frequently causes jams in this specific area.

A feed roller inspection every 20,000 pages helps prevent these jams.