Press [Menu] key, and then select the setting items using the [] or [] key.
Select [Maintenance] Press [OK]
Select [Quality Maintenance] Press [OK]
Select [Auto ImgDensAdj &ColrCalib] Press [OK]
Select [Adjustment and Calibration] Press [OK]
Select the resolution Press [OK] Press [OK]
The resolution can be selected from 600 × 600 dpi (1 bit), 600 × 600 dpi (2 bit), 600 × 600 dpi (4 bit) or 1200 × 1200 dpi (1 bit).