121.01CS963de

Lexmark CS963de error 121.01: Paper Feed Troubleshooting

The Lexmark CS963de error 121.01 indicates a synchronization failure during paper transport. The paper failed to reach the target sensor in the designated window, likely due to a mechanical obstacle or low friction on the pickup rollers.

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Common causes

  • 1Worn or dusty feed rollers.
  • 2Poorly adjusted paper guides.
  • 3Torn paper fragments in the path.
  • 4Blocked or malfunctioning paper sensor.

Solutions

Diagnóstico rápido

Error 121.01 means the paper didn't arrive on time. Inspect for tiny fragments of torn paper that might be catching on the transport rollers.

Solución paso a paso

  1. Pull out the input paper tray.
  2. Look inside the machine to clear any obstructions.
  3. Clean the feed rollers with a soft, slightly damp cloth.
  4. Reset the paper guides to the exact paper size.
  5. Reload high-quality paper without exceeding the fill line.

Prevención y mantenimiento

Avoid damp or overly thick paper. Clean your rollers periodically to keep the feed mechanism effective.

Cuándo llamar a un técnico

If the error 121.01 persists after clearing the path and cleaning rollers, the paper sensor itself might be damaged and requires a professional service call.

Ficha técnica del equipo

Steps to follow

  1. 1

    Clear Path

    Remove paper from trays.

  2. 2

    Clean Rollers

    Clean rubber rollers with a damp cloth.

  3. 3

    Adjust Guides

    Ensure paper guides fit the paper.

  4. 4

    Test

    Run a test print.

Frequently asked questions

The paper failed to reach the transport sensor on time.

Yes, dusty rollers cause loss of traction.

80g standard paper is recommended.

Check the paper path every 10,000 prints.

Lexmark CS963de error 121.01: Paper Feed Troubleshooting | Vimazdev