Original Size Detection - Ricoh MP 7503SP Field Service Manual

5. Detailed Descriptions

Original Size Detection

• Original size detection is triggered by the APS [A] when lowering the ADF switches the sensor from
off to on.
• Original length is detected using one original size sensor [B].
• At the same time, pre-scanning is done so the C-MOS image sensor can detect the original width.
At this time the scanner LED lights only one-third of the detection area near the front.
• If the Start key is pressed with the ADF (platen) is up (APS: OFF), the size of the previous original is
used.
Sensor States
The combinations of the sensor states are used to determine the original size, and this data can be
confirmed with SP4-301-001. The data for each detected size is displayed by SP4-301-001 as shown
below. Due to the layout of the sensors, paper sizes smaller than B5 cannot be detected, so in this case
all zeroes are displayed (0000 0000).
Original Size Detection
[A] A4 SEF
1024