B1.4 Toner Low Detection - Oki OKIOFFICE44 Service Manual

B1.4 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.
Toner sensor
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.
Print Operation Description
Photointerrupter
Hardware Configuration of Toner Sensor
Magnet draw-in
t1
Image drum unit
Agitation bar (iron)
Magnet
Toner sensor lever
T
B - 14
Service Manual, P/N 59276801
OKIOFFICE 44