e-21fi-6402

Fujitsu fi-6402 Error E-21: Diagnosis and Repair

The Fujitsu fi-6402 scanner error E-21 refers to a paper intake error during document scanning. This code appears when sensors detect that the document did not enter correctly or there was a synchronization error in the feeder. Periodic cleaning usually resolves this problem effectively.

1 views

Common causes

  • 1Worn or dirty rubber rollers.
  • 2Use of documents with weights outside the range.
  • 3Paper detection sensor blocked by particles.
  • 4Premature wear of the separation pad.

Solutions

Diagnostic

The scanner stops during the process and displays E-21 on the screen. Check if multiple sheets are stuck together or if the side guides are too tight.

Step-by-Step Solution

  1. Opening: Open the top cover of the scanner.
  2. Cleaning: Wipe the feed rollers with a cloth dampened with isopropyl alcohol.
  3. Pad Review: Check that the separation pad does not have sticky residue.
  4. Test: Close the cover and try a test scan.

Prevention and Maintenance

Use compressed air to remove paper dust. Replace the consumable kit (pad and rollers) according to the usage counter indicated in the official software.

When to Call a Technician

If the E-21 error persists on every document after cleaning, the ADF motor or an internal sensor might require replacement.

Technical Data

  • Technology: Double-sided scanning (ADF)
  • Speed: Up to 80 ppm
  • Connectivity: USB 3.0
  • Daily Cycle: 10,000 sheets
  • Compatible Consumable: Fujitsu original roller and pad kit
  • Recommended Use: Intensive file digitalization
  • Official Drivers / firmware

Steps to follow

  1. 1

    Clean rollers

    Use a cloth with official roller cleaner to remove paper dust.

  2. 2

    Adjust guides

    Ensure paper guides are aligned to the document.

Frequently asked questions

The E-21 error indicates a paper intake failure, usually caused by dirty rollers or wear of the separation pad.

It is not serious, but it hinders continuity in batch scanning processes.

If roller cleaning does not work, it is possible that the original consumable kit needs to be replaced.

Basic cleaning is recommended every 5,000 scans to prevent paper debris buildup.