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Service Guide OKIPAGE4w
Chapter 2 Operation Description
Toner Low Detection
• Hardware configuration of toner sensor
The figure below shows the hardware configuration of the toner sensor.
• Toner detection method
(1) Toner sensor monitoring conditions are shown in the figure below.
The toner sensor is not monitored when the drum is inactive.
(a) When the toner-low state is detected twice, Toner Low occurs. (This state is monitored at a cycle of
40 milliseconds.)
(b) When the toner-full state is detected 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.
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