TONER SUPPLY AND RECYCLING
B234/B235/B236/D101/D102/D103 6-104 SM
3 Toner Supply Cylinder Agitator, Toner End Sensor Cleaning
A small toner cylinder agitator motor drives the agitator inside the toner cylinder.
This motor turns on when the toner hopper sensor signals insufficient toner and
turns off as soon as the toner hopper sensor signals sufficient toner.
The toner cylinder TE (toner end) sensor checks the toner level 1 s after the
agitator motor turns off and thereafter checks at 200 ms intervals. It does not check
the toner level while the agitator motor is on.
4 Toner Supply Cylinder Æ Toner Hopper
The toner hopper sensor controls the operation of the toner pump motor. The toner
hopper sensor checks the level of the toner 1 sec. after the hopper agitator turns
off, and 1 sec. after the toner pump motor turns off. If the sensor detects insufficient
toner, it waits for 1 sec. then signals the pump motor to switch on for 2 s.
If the sensor detects insufficient toner for more than 2 sec., it signals the machine
to issue SC495 because toner supply has stopped due to a blockage in the toner
supply path below, a defective toner pump, or some other problem.
5 Toner Hopper Æ Development Unit
The toner hopper agitator motor turns on with the toner supply pump motor.
The machine maintains a running count for the time the hopper supply clutch
remains on. For every 500 ms the hopper supply clutch remains on, the agitator
motor is turned on for 500 ms. The count is reset every time the hopper agitator
motor turns on, or is reset as soon as the toner hopper sensor signals "toner
present".
SP2977 (Toner Supply/Transport Display) logs the total on time of key components
in the toner supply system (toner bank motor, toner supply clutch, toner collection
bottle agitator, toner supply cylinder agitator motor, and the toner pump motor). For
more, please refer to Section "5. Service Tables".
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