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Toner Container
Toner cartridge is filled with toner and supplies to the drum unit.
The toner in the toner cartridge is fed to the sub hopper and then to the developing unit by the toner feed screw. The toner presence/absence in the sub hopper is detected by the sub hopper toner sensor (TS2) which is a magnetic permeability sensor.
If the developing unit toner sensor (TS1) detects the absence of the toner in the developing unit, the hopper motor (M7) drives to rotate the toner feed screw to feed toner in the sub hopper to the developing unit. Also, if the sub hopper toner sensor (TS2) detects the absence of the toner in the sub hopper, the bottle motor (M7) drives to rotate the toner cartridge to feed the toner in the toner cartridge to the sub hopper.
If the sub hopper toner sensor (TS2) keeps detecting the absence of the toner for more than the specified period of time, no toner in the toner cartridge is assumed and the message to replace the toner cartridge will be displayed. Also, if the developing unit toner sensor (TS1) keeps detecting the absence of the toner for more than the specified period of time, no toner in the developing unit is assumed and a "No Toner" error message will be displayed.
TS2
Sub hopper toner sensor
M1
Main motor
M6
Hopper motor
M7
Bottle motor
[1]
Sub hopper toner sensor detection signal
[2]
Bottle motor drive signal
[3]
Main motor drive signal
[4]
Hopper motor drive signal