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PTM 2-59 B070/B071
If the toner hopper sensor (in the toner hopper - Toner Hopper) detects an
insufficient amount of toner in the hopper, the toner bank mechanism is started up.
If there is sufficient toner in the toner entrance tank (detected by the toner near end
sensor in the toner bank), the toner supply coil clutch turns on for 2 seconds. The
toner supply pump motor turns on for 7 seconds at the same time as the toner supply
coil clutch.
Next, if the toner hopper sensor still does not detect toner, the toner supply coil clutch
turns on for 2 seconds again until the toner hopper sensor detects toner (this is done a
maximum of 10 times). When the toner hopper sensor detects toner, the toner supply
pump motor turns off 1 second after the toner supply coil clutch turns off.
If the toner hopper sensor does not detect toner in the toner hopper after the toner
supply coil clutch has turned on 10 times, the operation panel returns SC495 (Toner
Bank Error).
The toner supply pump motor sensor (mounted on the toner supply pump motor)
monitors the operation of the pump motor. If the sensor detects that the motor does
not rotate during the toner supply process, the operation panel returns SC591 (Toner
Supply Motor Lock) and the job halts.