e1-4020DS-870

Epson DS-870 error E1-4020: Ultrasonic Sensor Failure

The Epson DS-870 error E1-4020 is a multi-feed detection alert triggered by the ultrasonic system. If you wonder what does error E1-4020 mean, it is a smart protection feature that prevents document loss during batch scanning. This is a common maintenance event for enterprise scanning hardware.

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Common causes

  • 1Excessive static on document surfaces.
  • 2Worn or dirty separation pad.
  • 3Dust on ultrasonic sensor lenses.
  • 4Inconsistent document thickness in the stack.

Solutions

Diagnóstico rápido

Error E1-4020 appears when the scanner's ultrasonic sensor identifies more than one sheet moving at once. Check if the pages are clean and separate.

Solución paso a paso

  1. Fan the stack to remove static electricity.
  2. Clean the ultrasonic sensor using a dry, soft brush or cloth.
  3. Inspect the separation pad for wear or build-up.
  4. Resume scanning with a single page test.

Prevención y mantenimiento

Use original replacement kits and perform cleaning every 5,000 scans. Store paper in a dry, low-humidity environment to prevent sticking.

Cuándo llamar a un técnico

If the error persists after cleaning and part replacement, the main board or the sensor module may be defective.

Ficha técnica del equipo

  • Technology: Sheet-fed Scanner
  • Performance: 65 ppm
  • Connectivity: USB 3.0
  • Feeder Capacity: 100 sheets
  • Compatible Consumable: Separation Pad (B12B819031)
  • Recommended Use: Enterprise office use
  • Official Drivers / firmware

Frequently asked questions

It means the scanner detected two or more pages feeding simultaneously, which triggers a stop to ensure data accuracy.

It is not critical but stops operations; clean the sensor area and check the separator pad to fix it.

Yes, a worn-out separation pad is a common cause for this multi-feed error.

Fan the papers before loading them and keep the internal components clean and free of dust.

Epson DS-870 error E1-4020: Ultrasonic Sensor Failure | Vimazdev