The DC controller notifies the formatter when an ITB assembly is near its end-of-life. ITB end-of-life is
determined when the DC controller detects a specified number of pages have been printed, or the ITB
has been used for a specified time period, after the ITB assembly was replaced.
ITB cleaning mechanism
The cleaning blade in the ITB cleaner scrapes the residual toner off the ITB surface. The ITB motor drives
the residual toner feed screw, and the screw deposits the residual toner in the toner collection unit.
The DC controller detects whether the toner collection unit is full by monitoring the ITB residual toner full
sensor. When the DC controller determines the toner collection unit is full, it notifies the formatter. The
DC controller also detects the presence of the toner collection unit by monitoring the toner collection unit
switch.
Figure 1-28 ITB cleaning mechanism
SW6
ITB
M1
DC controller
Toner collection unit switch
ITB residual toner full sensor
Cleaning blade
ITB cleaner
ITB motor
Residual toner feed screw
Toner collection unit
40 Chapter 1 Theory of operation ENWW
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