Samsung MSYS SF-6900 - Manual (Page 80)

2.48 Other functions
Maintenance
If you are getting streaks or spots on your print, you may run the
maintenance.
Cleaning drum
If print output quality decreases due to the presence of black streaks or
ghost images appearing on printouts, drum cleaning should be performed
as an attempt to rectify the problem.
1. Press Menu , then Maintenance on the one-touch keypad.
‘CLEAN DURM ?’ appears in the display.
2. Press Start/Enter . The LCD display shows drum cleaning is under way.
The machine outputs a single sheet of paper containing any excess toner
removed from the drum.
Adjust shading
The Adjust shading feature allows you to recalibrate the baseline value the
document scanner will interpret as white when scanning documents. This
procedure should be performed after cleaning the document scanner,
particularly if the white rubber roller remains stained after cleaning.
1. Press Menu , then Maintenance on the one-touch keypad.
‘CLEAN DRUM ?’ appears in the LCD display.
2. Press # or ❷ button. `ADJUST SHADING ?’ appears in the display.
3. Press Start/Enter . The LCD display prompts you to confirm your choice
by pressing the appropriate number key.
4. Press 1. The LCD display prompts you to load a sheet of white paper
into the automatic document feeder.
5. Load a single sheet of white paper into the automatic document feeder.
The machine immediately begins feeding the sheet of paper through the
automatic document feeder. ‘SHADING...’ appears on the LCD display.
6. The machine returns to standby mode.
CLEANING DRUM
PLEASE WAIT..