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ITB cleaning
The cleaning blade in the ITB cleaner scrapes the residual toner off the ITB surface. The residual toner
feed screw deposits the residual toner to the residual toner feed unit. The ITB motor and the residual
toner feed motor drive the screw. The DC control detects whether the toner collection box is full, using
the residual-toner full sensor, and then notifies the formatter.
Figure 1-27 ITB cleaning process
ITB
DC controller
ITB cleaner
Cleaning blade
Residual toner
feed screw
Residual toner full sensor
Toner collection box
Residual toner feed unit
ITB motor
Residual toner
feed motor
M12
M1
Calibration
The product calibrates itself to maintain excellent print quality. Calibration corrects color-misregistration
and color-density variation.
During calibration, the product places a specific pattern of toner on the surface of the ITB. Sensors at
the end of the ITB read the toner pattern to determine if adjustments are necessary.
NOTE: The product performs a drum-speed adjustment (DSA) during the full calibration operation.
The DSA compensates for variations between each drum and the speed of the ITB surface.
34 Chapter 1 Theory of operation ENWW