-Perform the Service Scan-Axis Calibration.

-Recover the Printheads (See How to fix the Nozzle Defects).

-Replace both Printheads and repeat Printhead Alignment.

-If the media used is a color media try the Printhead Alignment with white media and if the error persists replace the Lens Cover (See Lens Maintenance).

-Replace the Carriage Assembly (See Carriage Assembly and Belt).