Lexmark Optra W810 Service Manual page 59

4023-001
Toner bottle near empty
The toner bottle empty status is detected when the toner bottle
rotates and feeds toner to the sub-hopper. The bottle rotation
counter checks the number of bottle rotations. If the number of
rotations exceeds 10, the near empty status occurs. The bottle
supplies toner after the near empty status occurs.
Toner bottle empty
The toner bottle empty status in the imaging cartridge occurs when
the ATDC sensor detects a toner density (ratio of toner to carrier)
below 10%. When this occurs, the appropriate toner density cannot
be maintained. The bottle motor and toner supply motor stop. The
toner empty status is recorded and will not reset until the toner
cartridge is replaced.
ATDC Sensor
The developer, circulated by a screw, passes over the ATDC sensor.
The sensor measures the ratio of toner to carrier (T/C ratio) in the
developer. This ratio is converted to a charge and input to PWB-A.
When the sensor detects a low T/C ratio, T/C recovery mode begins.
General Information
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