Toner Near End & End Detection - Ricoh B246 Series Manual

Toner Near End & End Detection
After the toner supply clutch has turned on, the
machine checks the toner end sensor.
The clutch turns on every copy for at least 16 ms as
part of the toner supply process.
If the sensor detects low toner for two consecutive
copies:
The toner supply motor turns the toner bottle.
If the motor has turned on more than 30 times in the
last 100 copies, "Toner Near End" is displayed.
If 1,000 consecutive copies have been made with low
toner, "Toner End" is displayed.
The toner end sensor is used.
The sensor is at the bottom of the toner hopper.
The slide outlines the steps in the toner end detection process.
Look at the equation for toner supply, and you will see that the clutch always turns
on for the 'clutch startup time' of 16 ms, even if 'GAIN' is zero.
Service manual, section 6.9.10, Toner End Detection
Service manual, section 6.9.10, Sensor Control Mode
191
Service manual, section 6.9.7
191