HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
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3.4.2 New toner detection mechanism
(1) The main motor will drive gear (4) through the interconnection of other gears.
(2) When gear (4) is rotated, rib A on that gear will push against the new toner actuator; the
new toner sensor will detect the actuator motion, and the toner sensor detects that a new
toner cartridge has been installed.
(3) The standard toner cartridge has Rib A and Rib B on gear (4).
When the toner actuator is pushed twice, the two signals that are generated by the new
toner sensor, tell the machine that a standard toner cartridge has been installed.
(4) The high yield toner cartridge only has Rib A on gear (4).
When the toner actuator is pushed once, the signal that is generated by the new toner
sensor, tell the machine that a high yield toner cartridge has been installed.
<Printer side view when a new toner cartridge is installed>
Fig. 2-16
Gear (4)
Gear (3)
Gear (2)
Gear (1)
Rib B
Rib A
New toner actuator
New toner sensor
Relay front PCB ASSY
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