c4000TASKalfa 1801i

Kyocera TASKalfa 1801i error C4000: Technical Fix

The Kyocera TASKalfa 1801i error C4000 indicates a serious issue involving the image unit or bias voltage. The printer halts operation to prevent further internal damage. It is an industrial-standard office printer for mid-to-high volumes.

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Common causes

1Transfer unit connection fault.
2Worn-out image unit.
3High-voltage board power spike.
4Contaminated toner in the image unit.

Solutions

Diagnóstico rápido

Error C4000 typically points to an electrical disconnection or short in the image unit. If it persists after a reboot, hardware inspection is required.

Solución paso a paso

Power off the device.
Remove the image/developing unit.
Clean the electrical terminals with a soft cloth.
Re-install the unit carefully and check if the error is cleared on power-up.

Prevención y mantenimiento

Only use genuine toner and carry out maintenance at requested intervals to ensure the transfer components remain in good condition.

Cuándo llamar a un técnico

If cleaning the contacts does not resolve C4000, the main high-voltage board or the image unit itself is faulty.

Ficha técnica del equipo

Technology: B/W Laser A3
Speed: 18 ppm
Connectivity: USB, Network optional
Compatible Consumable: TK-4105 toner
Recommended Use: Standard office document printing
Official drivers / firmware

Steps to follow

1
Check image unit
Ensure the image/developing unit is correctly installed.
2
Clean contacts
Wipe the electrical contact pins for the image unit.
3
Restart
Reboot the unit to check for successful initialization.

Frequently asked questions

This error points to a failure in the transfer or charging process, often linked to the image unit.

Check electrical connections or replace the image/developing unit if worn out.

Use TK-4105 toner cartridges.

Preventive maintenance is recommended every 150k pages.