Oki OF5600, Service Manual

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Print Operation Description B - 19 OKIFAX 5300/5600
Service Manual, P/N 59278301
B2.3.3.1 Toner Low Detection
Composition
The device consists of the stirring gear which rotates at a constant rate, the stirring bar and the
magnet on the stirring bar. The stirring bar rotates through the link on the protrusion in the
stirring gear.
The configuration of stirring bar in the figure below may differ. The principle of toner detection,
however, remains the same.
Operation
Toner Low is detected by monitoring the time interval between the encounter of the magnet
set on the sensor lever and the magnet on the stirring bar.
Stirring Gear
Section
Sensor
Lever
Toner
Sensor
Sensor
Lever
Stirring Bar
Stirring Bar
Operation during toner full state
• The stirring bar rotates due to interlocking
with the stirring gear.
• Even when the magnet on the stirring bar
reaches the maximum height, since the
other side is being dipped in the toner, the
stirring bar is pushed by the stirring gear.
Operation during toner low state
• When the stirring bar reaches the maximum
height, since there is no resnstance provided
by the toner on the other side, it falls to the
minimum height due to its own weight.
Because of this, the time interval during
which it is in encounter with the magnet of
the sensor lever becomes long. By monitor-
ing this time interval, toner low can be
detected.
Stirring Bar
Stirring Gear
Magnet
Protrusion