error-71MFC-EX670

Brother MFC-EX670 Error 71: Motor Fault

The Brother MFC-EX670 error 71 is a mechanical alert that the print carriage motor has encountered unusual resistance. This jam is usually triggered by paper fragments, improperly placed labels, or debris on the encoder strip. To fix the Brother MFC-EX670 error 71, you must inspect the carriage path and verify that no physical obstructions exist.

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Common causes

  • 1Paper or label remnants blocking the carriage.
  • 2Dried ink on the slide rail.
  • 3Dirty encoder strip.
  • 4Electronic traction motor failure.

Solutions

Quick Diagnosis

If the carriage strikes the sides or stops in the middle with a thud, error 71 triggers to prevent the motor from overheating.

Step-by-step Solution

  1. De-energize: Disconnect the printer entirely.
  2. Inspect: Open the front cover and look for paper remnants.
  3. Clean: Wipe the guide rail with a clean, dry cloth.
  4. Test: Move the carriage left and right; if you feel resistance, look for foreign objects.

Prevention and Maintenance

Avoid using paper with adhesives or labels that could peel off and jam the unit. Maintain the internal area free of dust.

When to Call a Technician

If the rail is clean and the carriage still jams, the traction motor might have suffered an electronic failure.

Technical Specifications

  • Technology: INKvestment Tank
  • Speed: High Efficiency
  • Connectivity: Wi-Fi / USB
  • Consumable: LC400 series cartridges
  • Recommended Use: Home and Small Business
  • Official Drivers / firmware

Steps to follow

  1. 1

    Turn Off

    Power off and disconnect the power cable.

  2. 2

    Remove Obstructions

    Check for any leftover paper trapped inside.

  3. 3

    Verify Carriage

    Manually slide the carriage to check for resistances.

Frequently asked questions

It indicates a fault in the carriage motor, typically caused by a mechanical obstruction or lack of rail lubrication.

Occasionally, a restart clears minor jams, but usually, manual cleaning is required.

Yes, ink residue or leaks on the rails can thicken and obstruct smooth movement.

Keep the input tray closed when not in use to prevent internal dust.

Brother MFC-EX670 Error 71: Motor Fault | Vimazdev