error-390MB262

OKI MB262 error 390: Troubleshooting Guide

OKI MB262 error 390 occurs when the printer fails to communicate with the toner cartridge chip. This discrepancy prevents the printer from checking toner levels, stopping the print cycle to avoid drum damage. It is common when using third-party cartridges or when chip contacts are dirty.

1 views

Common causes

  • 1Oxidized or dirty toner chip contacts.
  • 2Low-quality generic toner chip.
  • 3Misalignment of the cartridge in the drum unit.
  • 4Mainboard failure.

Solutions

Quick Diagnosis

Error 390 appears on the LCD at power-on. Unlike paper errors, this is purely logic-based. If using a new cartridge, ensure the plastic protective seal is fully removed.

Step-by-Step Fix

  1. Power off the printer completely.
  2. Remove the toner and check for residue on the golden chip contacts.
  3. Clean the chip gently with a microfiber cloth.
  4. Reseat the cartridge firmly until you hear a click.
  5. Restart the unit.

Prevention and Maintenance

Avoid touching chip contacts with fingers; natural oils can cause signal interference. Use high-quality cartridges that adhere to ISO standards to ensure reliable communication.

When to Call a Technician

If the issue persists with original cartridges, the drum interface board may have damaged connector pins.

Device Specifications

  • Technology: LED Digital
  • Speed: 26 ppm
  • Connectivity: USB 2.0
  • Consumable: OKI B412/MB472 series
  • Usage: Small office
  • Official drivers

Steps to follow

  1. 1

    Open

    Open toner panel.

  2. 2

    Reinstall

    Remove and reseat cartridge.

  3. 3

    Clean contacts

    Clean toner chip contacts with a dry cloth.

Frequently asked questions

This error means the toner chip is not recognized by the printer.

The printer will not work until the consumable is validated.

Use original OKI consumables to prevent chip errors.

Keep contacts clean periodically.