Toshiba DP120F Service Manual page 303

4.3.4 Paper Size Sensor/Optional Paper Size Sensor
The paper size sensor (upper - row) is installed at each of three places on the base block and
detects the size of recording paper in the recording paper tray.
The optional paper size sensor (middle/lower - row) is installed at each of three places on the
optional recording paper tray sensor frame of the optional recording paper tray and detects the
size of recording paper in the optional recording paper tray.
The paper guide of the recording paper tray pushes in the switch of the sensor to turn on the
sensor. This detects the paper guide set position (LT, A4 or LG) of the recording paper tray.
When all the three paper size sensors are off, it will be judged that there is no recording paper
tray.
Paper guide set position
No recording paper tray
DP120F/DP125F PBA Outline and Sensor Function
Insert direction
Paper guide
Fig. 6-4-7
LT
A4
LG
ON
Paper size sensor/
Optional paper size sensor
PS0 PS1
LOW HIGH
HIGH LOW
HIGH HIGH
HIGH HIGH
6-16
06-04-07
PS2
HIGH
HIGH
LOW
HIGH
March 2000 © TOSHIBA TEC