c7990ECOSYS M2635dw

Kyocera ECOSYS M2635dw error C7990: Waste Toner Fix

The Kyocera ECOSYS M2635dw error C7990 informs the user that the waste toner container is at full capacity. This maintenance task is essential to keep the machine running efficiently.

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Common causes

  • 1Waste box service life limit reached.
  • 2Obstruction of the waste toner sensor.
  • 3Incompatible or faulty replacement box.
  • 4Faulty main board controller.

Solutions

Diagnóstico rápido

Error C7990 alerts that the waste box is at its limit. If printing stops suddenly with this warning, you must perform a replacement.

Solución paso a paso

  1. Power off: Shut down the device.
  2. Remove: Open the front panel and pull out the waste box.
  3. Install: Put in a new original container.
  4. Reset: Close the cover; the printer automatically resets the status.

Prevención y mantenimiento

Do not try to reuse the container. Always buy genuine Kyocera replacements to maintain warranty and sensor accuracy.

Cuándo llamar a un técnico

If the error doesn't clear after a new container is installed, the sensor board inside the machine may be dirty and requires professional cleaning.

Ficha técnica del equipo

  • Technology: Monochrome Laser
  • Speed: 35 ppm
  • Connectivity: USB, LAN, Wi-Fi
  • Capacity: 250 sheets
  • Compatible consumables: TK-1150 Toner
  • Usage: High-volume business
  • Drivers / official firmware

Steps to follow

  1. 1

    Remove

    Open front cover and remove the waste toner container carefully.

  2. 2

    Clean

    Wipe the area to ensure no toner buildup.

  3. 3

    Install

    Insert a new container until it clicks into place.

Frequently asked questions

The waste toner box is full and needs replacement to prevent internal toner spills.

No, the printer locks out for safety to prevent damage to the imaging unit.

It uses the TK-1150 toner cartridge series.

No, never empty and reuse the waste box; toner dust is a health hazard and reusing it causes sensor errors.