Ricoh PCU10, Руководство по обучению обслуживанию

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2.10 Toner Density Control
2.10.1 Outline of toner density control
Fundamentally, this machine uses the toner density sensor to control the amount of toner supplied
to the development unit, and thus maintain a stable toner density in the development unit.
However, even with this operation, the image density on copies may vary due to changes of
environmental conditions, such as temperature and humidity. To make image density steady, the
toner density control is modified by the ID sensor.
2.10.2 ID sensor operation
ID sensor pattern production timing
When the main switch is ON (only when more than one
hour has passed after the main switch is OFF), or after
500 copies or more are completed, the machine enters
the ID sensor mode, and an ID sensor pattern is
produced.
Main switch ON
(or at 500 copies end)
Always
Main
switch ON
OPC idling
mode
ID sensor
pattern erase
ID sensor
mode
Toner Density Control 1 July 1994
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