Functions Of Each Sensor - Toshiba DP120F Service Manual

4.3

Functions of Each Sensor

4.3.1 Document Sensor
Feed direction
The document sensor is installed on the DOCUMENT SENSOR PBA inside the scanner cover
and detects whether any document is placed on the document support. When the actuator of
the sensor is pushed up by the document to turn on the sensor, the loading of a document will be
detected.
In case the sensor stays on even a fixed time after the transport of the document has started,
a document jam will be assumed.
4.3.2 Document Position Sensor
Feed direction
The document position sensor is installed on the DOCUMENT SENSOR PBA inside the scan-
ner cover and detects whether the placed document has been transported to before the reading
position of the CIS. When the actuator of the sensor is pushed up or released by the document
to turn on or off the sensor, the start or end of reading the document will be detected.
In case the sensor stays on even a fixed time after the transport of the document has started,
a document jam will be assumed.
DP120F/DP125F PBA Outline and Sensor Function
Actuator
ON
Fig. 6-4-4
Actuator
ON
Fig. 6-4-5
6-14
Document sensor
Document
Document position sensor
Document
06-04-04
06-04-05
March 2000 © TOSHIBA TEC