Perform the color calibration of the external controller. For details see, Operating Procedure for Color Calibration.
If the problem occurs only if black is used when printing in full-color mode, carry out the procedure in see Low Image Density.
Perform the color calibration of the external controller. For details see, Operating Procedure for Color Calibration.
If the problem occurs only if black is used when printing in full-color mode, carry out the procedure in see Low Image Density.