Oki OKIOFFICE 84 Service Manual page 450

B.4 Toner Low Detection
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Hardware configuration of toner sensor
The figure below shows the hardware configuration of the toner sensor.
Hardware Configuration of Toner Sensor
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Toner detection method
(1) Toner sensor monitoring conditions are shown in the figure below.
Caution:
The toner sensor is not monitored when the drum is inactive.
(a) When the toner-low state continues twice, Toner Low occurs. (This state is monitored at a cycle of 40
milliseconds.)
(b) When the toner-full state continues twice, Toner Low is released. (This state is monitored at a cycle of 40
milliseconds.)
(c) When the toner sensor does not change over two cycles (T x 2), the toner sensor alarm state occurs.
(d) After the image drum unit has been replaced (after the drum counter has been reset), Toner Low is not detected
when the drum counter indicates 1 to 100 counts.
Service Guide OKIOFFICE 84
Chapter B Print Operation Description
Page: 267