7. Scanner section (IR section)
Theory of Operation Ver. 8.0 Jun. 2008
2
6
Composition/Operation
7.3.3
Original size detection control
A. Detection method
• For detection of the original size, the reflective size sensors detect the length of the orig-
inal while the CCD detects the width of the original.
• Mounting the optional sensor on a machine intended for the metric areas permits detec-
tion of inch sizes. Mounting the optional sensor on a machine intended for the inch areas
permits detection of metric sizes.
• With Image processing board, the original size will be judged by the original size sensor
and CCD.
• An original of an irregular size is rounded to the nearest standard size.
NOTE
• Table 1 or 2 can be selected in the service mode.
A00JT2C029AA
4037T2E597AA
Automatic document feeder
20 degree sensor (PS202)
CCD unit
Exposure unit
Original standard
position
Original read
position
Exposure unit
313.5 mm
Original size
detection
sensor 1 (PS204)
20 degrees
Original size
detection
sensor 2 (PS205)
346.1 mm
Theory of Operation Y107522-3
