Oki Data CONFIDENTIAL
2. Operational explanation
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2.3 Toner entrance detection
Toner sensor detection principle
Toner low is detected by the toner sensor (reflect sensor) installed in the printer. The light shield plate is
installed in the ID, and its rotation is synchronized with mixing of toner. If the light shield plate or toner
sensor is dirty with toner or something, or the ID unit and the toner sensor are facing each other at an
improper position due to improper setting of the ID unit or any reasons, toner low cannot be detected
correctly, and a toner sensor error occurs.
Toner count principle
After the image data is transformed into binary data which can be printed by the printer, the data is
counted as print dot number by LSI. The amount of the used toner is calculated from this count value,
and the residual amount is displayed on the menu.
Toner LOW detection (residual amount display on LCD) by the toner sensor is to detect a certain amount of the
reduction of the toner left in ID.
Light board
Toner sensor