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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).
