Messages regarding printing or adjusmentCannot adjust printhead.Cause Corrective ActionThe Printhead nozzles are clogged. Follow the steps below to check the nozzles.1.Print a test pattern to check the nozzles.(→P.693)2.Clean the Printhead if the nozzles are clogged.(→P.694)Highly transparent lm is loaded that cannot be usedfor Printhead adjustment.We recommend using a type of paper that you oftenuse, other than lm, for Printhead adjustment.(→P.649)Excessive temperature or humidity.Cause Corrective ActionPress the Stop button and stop printing.Use the printer in an environment that meets therequirements for the operating environment. Notethat various environmental conditions are alsorecommended for various types of paper. For detailson the recommended environmental conditions forpaper, see "Paper Reference Guide ." (→P.167)The temperature or humidity where the printer isinstalled is out of the acceptable range for printeroperation.Press the OK button and complete color calibration.However, calibration may not be completedsuccessfully.Cannot calibrate.Cause Corrective ActionThe paper for printing a test pattern for adjustment issoiled. Otherwise, colored paper is loaded.Load unused paper compatible with color calibration.(→P.167)The printed test pattern is faint. Take steps to remedy the faint printing.(→P.739)Direct sunlight or strong lighting may be shining onthe printer and causing the sensor to malfunction.Take steps to ensure the printer is not used whenexposed to direct sunlight or strong lighting.Error Message 779
