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Service Guide OF2200/2400/2600
Chapter 1 Principles of Operation
1.6.02 Toner Low Sensor
The toner well of the image drum cartridge contains a toner agitator. Whenever the image drum rotates,
the toner agitator attempts to turn. A spring clip in the bottom of the toner well (along with the proper
amount of toner) holds the agitator at the bottom of the well. However, when toner is distributed unevenly
or an insufficient amount of toner is in the well, the toner agitator will rotate. Therefore, as long as the
toner well contains an adequate supply of evenly distributed toner, the toner agitator will not rotate.
The toner sensor lever has a magnet embedded in it. Whenever the toner agitator is positioned at the
bottom of the toner well, the toner sensor lever is magnetically attracted to the toner agitator. This causes
the toner sensor lever to be lifted from the path of the toner sensor.
During a low toner condition (less than 20 grams of toner remaining), the toner agitator will rotate
continuously. This causes the toner sensor to turn ON / OFF as the image drum rotates. The operator
panel will then display the TONER LOW message.
During an unevenly distributed toner condition, the toner agitator will rotate until the toner is distributed
sufficiently. This causes the toner sensor to turn ON / OFF for only a few image drum rotations. The
operator panel will not display an error message since this is normal printer operation.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
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Summary of Contents for OF2600
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