400B401d

OKI B401d error 400: Paper feed issues fixed

OKI B401d error 400 is an alert regarding the paper tray feeding mechanism. Why is my OKI B401d showing error 400? This happens when the unit fails to pull a sheet, either because the paper is jammed or the pickup rollers have lost their grip. It is a common maintenance issue in high-usage home offices.

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Common causes

  • 1Worn-out rubber pickup rollers.
  • 2High humidity levels affecting paper rigidity.
  • 3Excessive paper stack leading to high friction.
  • 4Foreign debris in the feeding path.

Solutions

Diagnóstico rápido

If you see error 400, inspect the paper input area. Ensure the tray is fully pushed in. Listen for the sound of the pickup motor; if you hear it struggling to pull, the rollers are likely dirty or worn out.

Solución paso a paso

  1. Empty: Remove all paper from the tray.
  2. Inspect: Check the internal paper path for any stray scraps.
  3. Clean: Clean the rollers using a dedicated rubber cleaner or damp cloth.
  4. Reload: Fan the paper before inserting to reduce static and adherence.

Prevención y mantenimiento

Regularly clean the pickup rollers every 5,000 prints to prevent dust buildup. Avoid overfilling the tray, as this adds excessive pressure to the feeding mechanism. Keep paper stored in an area with stable humidity to maintain rigidity.

Cuándo llamar a un técnico

If you have cleaned the rollers and the error keeps occurring, the internal paper sensor or solenoid might be faulty. This requires professional servicing.

Ficha técnica del equipo

  • Technology: LED Laser.
  • Input Capacity: 250 sheets.
  • Supported Paper Weight: 60 - 120 g/m².
  • Compatible Consumable: B401 series toner (44992401).
  • Speed: 30 ppm.
  • Official drivers / firmware

Steps to follow

  1. 1

    Remove paper

    Take out the paper tray and remove any jammed sheets or debris.

  2. 2

    Clean rollers

    Clean the rubber pick-up rollers with a damp, lint-free cloth.

  3. 3

    Adjust guides

    Make sure the side paper guides match the paper size perfectly.

Frequently asked questions

This error code indicates that the printer's pickup roller cannot grab paper from the tray, usually due to slippage or misalignment.

Yes, it halts all print jobs until the paper path is cleared and the tray is reseated correctly.

It is not a cartridge issue, but rather an issue with the rubber feeding rollers needing maintenance.

Always fan your paper before loading and keep the tray within capacity limits.

OKI B401d error 400: Paper feed issues fixed | Vimazdev