000042SureColor T7770

Epson SureColor T7770 error 000042: Encoder Failure

The Epson SureColor T7770 error 000042 is a frequent failure linked to encoder sensor reading. This error occurs when the thin transparent strip (encoder strip) gets dirty with ink or dust, preventing the printhead from calculating its exact position across the paper width. Resolving the Epson SureColor T7770 error 000042 begins with a delicate and precise cleaning of the positioning strip.

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Common causes

  • 1Accumulation of ink mist on the transparent encoder strip.
  • 2Ambient dust blocking the optical sensor light path.
  • 3Scratches on the positioning strip due to improper handling.
  • 4Electronic failure of the band reading sensor (encoder).

Solutions

Fast Diagnosis

The 000042 error typically triggers after intensive use, especially if environmental dust or ink mist has accumulated. If the printhead moves erratically or makes 'searching' sounds upon startup, the sensor isn't reading the encoder strip's notches. Cleaning this strip is the primary solution.

Step-by-Step Solution

  1. Power off the equipment and open the top lid.
  2. Locate the thin transparent strip crossing the width of the plotter (encoder strip).
  3. Use a very soft microfiber cloth, barely dampened with distilled water (never solvents).
  4. Gently slide the cloth along the strip to remove the mist.
  5. Wait for it to dry completely before powering on.

Maintenance and Prevention

Avoid touching the encoder strip with your hands, as natural skin oils can obstruct the optical sensor. Keep the workspace clean and consider using plotter covers if operating in high-dust environments.

When to Call a Technician

If the encoder strip shows scratches or cracks after cleaning, or if the printhead's optical sensor is damaged, call a certified technician for replacement.

Device Technical Sheet

  • Technology: High-precision plotter
  • Consumables: Epson UltraChrome XD3
  • Affected Component: Optical sensor and encoder strip
  • Maintenance: Strip cleaning every 6 months
  • Drivers / official support

Steps to follow

  1. 1

    Clean strip

    Gently clean the encoder strip with a dry, lint-free cloth.

  2. 2

    Check for dirt

    Look for ink or grease spots on the strip.

  3. 3

    Restart

    Power cycle to allow the sensor to read the clean strip.

Frequently asked questions

It means the optical sensor cannot read the marks on the encoder strip, losing the printhead's position reference.

If a gentle cleaning doesn't work, a technician should ensure the sensor isn't misaligned.

Uses UltraChrome XD3 inks; keep them away from the encoder strip when changing cartridges.

Keep the plotter in a dust-free environment and clean the strip semi-annually.

Epson SureColor T7770 error 000042: Encoder Failure | Vimazdev