Toshiba DP120F Service Manual page 306

4.3.9 Toner Empty Sensor
The toner empty sensor is installed on the developer assembly and detects the amount of toner
in the developer assembly. When the toner is running out, the sensor vibrates and causes the
output signal voltage to increase. The amount of toner is detected by observing a change in this
voltage.
4.3.10 Bypass Tray Paper Empty Sensor
Feed direction
The bypass tray paper empty sensor is installed on the base block and detects the presence or
absence of recording paper in the bypass tray.
When the actuator of the sensor is pushed up by recording paper in the bypass tray to turn on
the sensor, the recording paper placed will be detected.
March 2000 © TOSHIBA TEC
Developer assembly
Toner empty sensor
ON
Fig. 6-4-12
Bypass tray paper
empty sensor
Fig. 6-4-13
6-19 DP120F/DP125F PBA Outline and Sensor Function
Developer assembly
Toner empty sensor
Recording paper
06-04-12
06-04-13