400MB472w

OKI MB472w error 400: Paper feed maintenance tips

The OKI MB472w error 400 indicates that the printer's pickup sensor has timed out while attempting to feed paper. This is commonly caused by dusty rubber rollers or improperly adjusted media guides. Maintaining a clean paper path is essential to avoid this code.

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Common causes

  • 1Dusty or worn pickup rollers.
  • 2Overloaded paper tray preventing proper tension.
  • 3Damp paper causing friction loss during pickup.
  • 4Debris or foreign objects lodged in the paper path.

Solutions

Diagnóstico rápido

Error 400 typically manifests when the mechanical drive starts, but the paper sensor fails to trigger. Check the tray first to rule out empty paper or jams.

Solución paso a paso

  1. Power off the machine and open the front access door.
  2. Remove the paper tray and inspect the internal rollers.
  3. Wipe the rollers using a clean, damp cloth to restore grip.
  4. Reload the paper and ensure it is properly aligned with the side guides.

Prevención y mantenimiento

Avoid loading paper with staples or other metallic elements. Perform monthly roller maintenance. Consistent use of official toners helps minimize internal debris contamination.

Cuándo llamar a un técnico

If the rollers have been cleaned and the paper stack is correct but the printer still fails to pick up sheets, the pickup motor assembly may be reaching its end-of-life.

Ficha técnica del equipo

  • Tray capacity: 350 sheets
  • Paper type: Standard, Envelopes, Labels (80-163 g/m²)
  • Compatible Consumables: 45807106 series
  • Roller Cleaning: Recommended monthly
  • Environment: 20-80% Humidity
  • Drivers / firmware official

Steps to follow

  1. 1

    Remove paper

    Open the tray and remove all paper to check for debris.

  2. 2

    Clean rollers

    Use a damp cloth to clean the rubber pickup rollers.

  3. 3

    Adjust guides

    Ensure the paper tray guides are perfectly flush with the paper stack.

Frequently asked questions

Error 400 indicates that the printer failed to pick up paper from the tray, often due to roller dust or misaligned paper guides.

Yes, it is a system-blocking error. The printer will remain unresponsive until the paper path is cleared.

Use standard 80g bond paper. Heavy or recycled paper can cause feeding issues due to surface friction differences.

Keep the rollers clean and never overfill the input tray past the indicated limit line.