Ricoh Di-C1 Manual page 177

Uses these components:
TD sensor: Detects how much toner there is in
the developer
ID sensor: Measures the density of standard
sensor patterns during process control.
Pixel counter: Counts pixels to determine how
much toner for each colour is used on the page
The result of toner supply control determines
how long the toner supply motor turns on for.
This determines the amount of toner supplied.
This is done before every development for each
colour.
Slide 177
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Overview
177
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