New Toner Detection Boss - Brother HL-6050 Service Manual

CHAPTER 3 THEORY OF OPERATION
2.5.2

New toner detection boss

To prevent the toner leakage and image quality degradation when printing in a low duty, HL-
6050 has the function to detect when the new toner is installed.
(If the toner is used beyond its life when printing in low duty, image defect or toner leakage
may occur.)
1 Install the toner cartridge (brand-new) into the drum unit, then install it into the printer.
2 The new toner detection boss of the toner cartridge touches the actuator.
3 The sensor on the machine detects if it is a brand-new toner cartridge.
4 The new toner detection boss moves to the "used toner position" when the printer is used
once.
When a used toner is installed in the step 1, the toner detection boss does not touch the
machine actuator in the step 2. Therefore, the sensor on the machine will be OFF in the step
3.
DEV sensor
Drum unit
DEV actuator
New toner detection boss
Process guide L
Toner unit
Fig.3-34
3-28