New Toner Detection - Brother DCP-7030 Service Manual

3.4.3 New Toner Detection

When a toner cartridge is changed, discrimination between new and used toner cartridges is
performed by means of the new toner detection mechanism shown below.
<New Toner Detection Mechanism>
When a new toner cartridge is inserted into the machine, the rib on the reset gear pushes the
new toner actuator which turns on (activates) the new toner sensor, allowing the presence of
a brand new toner to be detected.
When the main motor operates, a driving force is transmitted to the reset gear by way of
several other gears, and the rib of the reset gear deviates from the new toner actuator.
Then the new toner sensor turns off.
• For high-capacity toner cartridges
The time taken before the new toner sensor is activated is longer after the main motor
starts to rotate, allowing the presence of a high-capacity toner cartridge to be detected.
• For standard toner cartridges
The time taken before the new toner sensor is activated is quicker after the main motor
starts to rotate, allowing the presence of a standard toner cartridge to be detected.
• For starter toner cartridges
The starter toner cartridge does not have a reset gear. When turning on power for the first
time after shipment, the machine presumes that the starter toner cartridge is attached.
Drum/Toner Unit
Drum/Toner Unit
* The figure shows a high-capacity toner cartridge.
New Toner Sensor
New Toner Actuator
Rib
Reset Gear
New Toner Sensor
New Toner Actuator
Reset Gear
Fig. Ref. 2-17
Ref. 2-18
New Toner Actuator
New Toner Sensor
New Toner Actuator
New Toner Sensor
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