● If you select and use the machine in an environment with low humidity, printed images or textmay be smudged.Has color mismatch correction or hue correction been performed properly?● If the effect of the color mismatches or color streaks (lines) is unacceptably strong, perform calibration.Correcting Color Mismatch and Hues(P. 579)White Spots AppearAre you using paper that has absorbed moisture?● Replace with appropriate paper.Loading Paper(P. 38)Are you using appropriate paper?● Check usable paper, and replace with appropriate paper.Paper(P. 620)Loading Paper(P. 38)Is it time to replace the toner cartridge?● Materials inside the toner cartridge may have deteriorated. Replace the toner cartridge.How to Replace Toner Cartridges(P. 569)Is the central area of high-density characters or lines left unprinted?● Change the setting of . The improvement effect is stronger with than with.Special Image Mode(P. 423)● The stronger the improvement, the lower the print density.Troubleshooting553