1-54 Service Manual
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The table below shows the combinations of document sizes and sensors.
O: Detectable
X: Not Detectable
While the document is traveling, document size detection is performed as follows.
When the document goes through the sensor (ADF APS 1), sensor (ADF APS 2) and the sensor (ADF APS 3),
the document width in the fast scanning direction is detected according to the combination of shielded/
unshielded status of each sensor.
The document length in the slow scanning direction is detected by the scanning time measured from the
moment when the document starts scanning from the wait position (see Pre-registration) until its tail end passes
through the sensor (ADF sheet through).
Document scanning steps
Document Size
Width (Fast scanning direction)
Sensor (document tray width *)
Length (Slow scanning direction)
Sensor (document tray length *)
Area
123 1 2 012
5.5 X 8.5 SEF Off Off Off On Off X O X
A5 SEF OXO
B5 SEF Off Off Off On Off X X O
8 X 10 SEF XOX
8 X 10.5 SEF OXX
A5 LEF Off On Off Off Off O O O
A4 SEF On Off O O O
5.5 X 8.5 LEF Off On On Off Off O O O
8.5 X 11 SEF On Off O O O
8.5 X 13 SEF On On O X X
8.5 X 14 SEF XOO
8 X 10 LEF On Off On On Off O O O
B5 LEF Off Off O O O
B4 SEF On On O O O
8 X 10.5 LEF On Off Off On Off O O X
Executive LEF Off Off O O X
16kai LEF XXO
8kai SEF On On O O O
8.5 X 11 LEF On On Off On Off O O O
11 X 17 SEF On On O O O
A4 LEF On On On On Off OOO
A3 SEF On On O O O
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