New Toner Detection Mechanism - Brother HL-2030 Service Manual

2.4.2

New toner detection mechanism

The printer detects the amount of the remaining toner with the sensor and indicates the timing
to replace the toner cartridge by lighting up the Toner LED to the user. The problem such as
toner leak or image defect may occur when low-duty printing is continued for a long time. To
prevent such a problem, the printer provides the function lighting up the Toner LED when the
toner is used to a certain degree to indicate it to the user.
When replacing the toner cartridge with a new one, the printer detects that the toner cartridge
is replaced with a new one by the new toner detection switch and cancels that the Toner LED
lights up.
The mechanism to detect the new toner cartridge is as follows:
(1) A new toner cartridge is installed into the drum unit, and the drum unit is installed into the
printer.
(2) The reset gear of the toner cartridge is contacted with the new toner actuator to push the
new toner actuator.
(3) Then, the new toner actuator pushes the new toner detection switch so that it is detected
that a new toner cartridge is installed.
(4) When the toner cartridge is installed into the printer, the reset gear is rotated gradually by
the main motor drive and moved to the position of "Toner in use".
When the reset gear is moved to the position of "Toner in use", the new toner actuator is
pulled back by the new toner actuator spring and returned to the original position. When
the reset gear is at the position of "Toner in use", the reset gear is not returned to the
original position since the reset gear and drive gear of the main motor are not engaged,
and the reset gear is not rotated.
New toner actuator
New toner sensor
New toner actuator
Drum/toner ASSY
Main frame L
New toner sensor
Reset gear
Fig. 3-32
3-27
HL-2030/2040/2070N SERVICE MANUAL
Confidential