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15 July 1996
PROCESS CONTROL
By selecting the proper gain data, the sensor output is set within the targeted
= 2.5 ± 0.1 V). Now, the sensor characteristic is
control level (V
, V
REF
REF
illustrated by curve B and the TD sensor initial setting is completed.
The selected gain data is stored in memory, and V
from the auto gain
OUT
control circuit stays constant during the toner sensor detection cycle.
<Toner Supply Criteria>
At every copy cycle, toner density in the developer is detected once. The
sensor output voltage (V
) during the detection cycle is compared with the
TD
toner supply level voltage (V
).
REF
A176D511.wmf
2-13
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