385B401d

OKI B401d Error 385: Main Motor Failure

The OKI B401d error 385 occurs when the main printer motor fails to reach the expected rotation speed. This blockage is usually the result of physical jamming in the rollers or wear in the gear system. Below, we explain the actions to take to restore the motor's operation.

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Common causes

  • 1Paper jam in the fuser or feed unit.
  • 2Mechanical wear of the traction system gears.
  • 3Excessive dust accumulation on the feed rollers.
  • 4Overload causing strain on the main motor.

Solutions

Quick Diagnosis

If you hear grinding sounds when attempting to print and the panel displays code 385, the motor is trying to engage, but something is impeding its natural motion.

Step-by-Step Solution

  1. Turn off the device and carefully remove the toner/drum unit.
  2. Inspect the printer interior for debris or detached labels that might block the rollers.
  3. Manually rotate the exposed gears (without forcing) to feel for any physical resistance.
  4. Clean the feed rollers with a slightly damp cloth and dry completely before reinserting consumables.

Prevention and Maintenance

Avoid using low-quality recycled paper or sheets with bent edges. Clean the rollers every 6 months to prevent toner dust buildup.

When to Call a Technician

If the motor continues to grind after clearing the paper path, the gear mechanism requires specialized technical service.

Technical Specifications

  • Technology: Monochrome LED.
  • Speed: High efficiency.
  • Connectivity: USB.
  • Capacity: Standard tray.
  • Compatible Consumables: B400 series toner.
  • Recommended Use: Small office.
  • Drivers / Official Firmware