PRINTING26 August 1998
TONER END DETECTION
[A]
G025D511.WMF
Toner near-end is detected by the toner end sensor [A], which is located below the
toner tank of toner cassette.
G025D532.WMF
While the main motor is rotating, the machine monitors the voltage output
(TONEND) from the toner end sensor. The voltage from the sensor is high when
the toner tank of the toner cassette is full. When the toner tank is almost empty, the
output of the toner end sensor starts occasionally dropping low as the toner level
changes with the stirring of the toner-mixing bar.
Toner near-end condition
When the Mechanical Control Board detects the following output from the toner
end sensor, the ?Toner near-end? is displayed on the LCD. (This is the toner near-
end condition).
Output of toner end sensor
5 V
0 V
XY
10 times
G025D733.WMF
0.6 s < X and Y < 2 s
The machine clears the toner near-end condition if the output from the toner end
sensor goes back high for more than 5 seconds.
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