Ricoh B079, Service Manual

Page: 346 / 948

SCANNING
B079/B082 6-14 SM
6.4.3 ORIGINAL SIZE DETECTION IN PLATEN MODE
The original width sensors [A] detect the original width, and the original length
sensors [B] detect the original length. These reflective photo sensors are referred
to collectively as the APS (Auto Paper Select) sensors.
While the power is on, these sensors are active and the original size data is always
sent to the CPU. However, the CPU checks the data only when the platen cover
sensor [C] is activated after the platen reaches about 15 cm above the exposure
glass as it is closed. The main CPU detects the original size by the on/off signals
received from the APS sensors.
NOTE: If the copy is made with the platen fully open, the main CPU determines
the original size from the sensor outputs after the Start

key is pressed.
B004D163.WMF
[C]
[B]
[A]