print-gap-errorML5790eco

OKI ML5790eco Error Print Gap: Troubleshooting

The OKI ML5790eco error print-gap-error occurs when the automatic distance sensor cannot calibrate the print head's proximity to the platen. This is typical when using thick carbon copy forms without proper lever adjustment.

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Common causes

  • 1Misaligned paper
  • 2Dirty sensor
  • 3Mechanical gear failure
  • 4Incorrect lever setting

Solutions

Quick Diagnosis

Check the paper thickness lever. If it's set too low for thick paper, the head cannot find its clearance point.

Step-by-Step Solution

  1. Move the manual thickness lever to the recommended setting.
  2. Clean the carriage rails from dust buildup.
  3. Perform a factory reset via the control panel.
  4. Remove any paper scraps from the platen area.

Prevention and Maintenance

Regularly clean the platen and rails with alcohol-free wipes. Avoid using staples in forms.

When to Call a Technician

If the print gap motor grinds or fails to move entirely, internal gears may require replacement.

Equipment Data Sheet

  • Technology: 24-pin Matrix
  • Consumible: ML5790 Ribbon
  • Drivers