MR-2012 CIRCUIT DESCRIPTION
5 - 4
October 2000 © TOSHIBA TEC
5.5 Meaning of Signals
The ADF top cover open switch detects the open or close state of the cover and uses a 2-circuit microswitch.
24V is supplied to the motor when the cover is closed, and cut when open.
The ADF open sensor detects the open/close state of the ADF unit. A photo sensor is used for the sensor.
The document length sensor detects the length of the document placed in the document tray. A photo
sensor is used for the sensor. It turns ON when the document length exceeds 306 mm.
The document width sensor detects the width of the document. A variable resistor is used for the sensor.
The resistive value changes as the document width guide is slid.
The ADF empty sensor detects the document placed in the document tray. A photo sensor is used for the
sensor.
The ADF registration sensor detects the document position in the transport path. A photo sensor is used
for the sensor. It detects a paper jam in combination with other sensors.
The ADF read sensor detects the document scanning start position. A mirror reflective type photo sensor
is used for the sensor. It detects the presence or absence of a document according to the strength of
reflected light from the mirror.
The document exit sensor detects the ejection of a document. A photo sensor is used for the sensor.
Signal name
COVER
DF_OPN
SIZE
WIDTH
EMPTY
REGST
POS
HAISI
Part name
ADF top cover
open switch
ADF open
sensor
Document
length sensor
Document width
sensor
Document
empty sensor
ADF registration
sensor
ADF read
sensor
ADF exit sensor
Functional description
Detects the open/close state
of the top cover during jam-
ming processing, etc.
Detects the open/close state
of the ADF unit.
Detects the length of docu-
ment.
Detects the width of docu-
ment.
Detects the loading of docu-
ment.
Detects the aligning posi-
tion of document.
Detects the document scan-
ning start position.
Detects the ejection of docu-
ment.
Status
-
Low: Open
Low: Document present
-
Low: Document present
Low: Document present
Low: Document present
Low: Document present
Note
Microswitch
Photo sensor
Photo sensor
Variable resistor
Photo sensor
Photo sensor
Photo sensor
Photo sensor
