402B432n

OKI B432n Error 402: Troubleshooting

The OKI B432n error 402 indicates a failure during the paper feed process or a jam detected in the main path. This error occurs when the printer sensors don't detect the arrival of paper within the expected timeframe. Troubleshooting the OKI B432n error 402 is typically straightforward, often requiring only minor cleanup. This machine is a professional-grade laser printer built for high-demand workplace environments.

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Common causes

  • 1Paper jam near the feed sensor
  • 2Worn pick-up rubber rollers
  • 3Damp or damaged paper
  • 4Toner dust accumulation on feed sensors

Solutions

Diagnóstico rápido

The 402 error occurs when the paper transport system struggles to grab the media. If you hear the motor but no movement, the rollers may have lost traction due to dust.

Solución paso a paso

  1. Slide out the paper tray fully.
  2. Look for debris or small paper scraps near the sensor.
  3. Clean the rubber rollers with a dry, clean lint-free cloth.
  4. Reload the paper and ensure the side guides are snug against the stack.

Prevención y mantenimiento

Use fresh, dry paper and ensure it is properly fanned before loading. Perform a routine cleaning of the pick-up rollers every few months to maintain proper grip.

Cuándo llamar a un técnico

If the error 402 remains despite clear paper paths and cleaned rollers, the feed clutch or motor assembly may have failed.

Ficha técnica del equipo

  • Technology: Laser LED
  • Print Speed: 40 ppm
  • Connectivity: USB, Gigabit Ethernet
  • Compatible Supply: B432/B512 toner & drum
  • Drivers / Official Firmware: https://www.oki.com/en/printing/support/drivers-and-utilities/b432n/

Steps to follow

  1. 1

    Open Tray

    Slide out the main paper tray.

  2. 2

    Clear Obstructions

    Gently remove any trapped or crumpled paper.

  3. 3

    Clean Rollers

    Wipe feeding rollers with a damp cloth.

Frequently asked questions

The error 402 indicates a paper feed failure or jam in the main tray.

Yes, usually involves removing debris and realigning paper.

It uses OKI B432/B512 toner series.

Fan your paper stack and ensure it doesn't exceed the tray limit.