Control Of Adf; Original Size Detection By Adf - Canon imageRUNNER 1750 Series Service Manual

2
Technical Explanation > Original Exposure and Feed System > Control of ADF > Original Size Detection by ADF
● LED Intensity Adjustment
The machine adjusts the length of time during which the LED turns on for each scan so that
the image scan level of the original reading sensor will be specific level.
Related Service Mode:
• CIS gain and offset correction
SCAN > READER > FUNCTION > CCD > CCD-ADJ
• DF white level adjustment
SCAN > READER > FUNCTION > CCD > DF-WLVL1 (Original glass scan)
SCAN > READER > FUNCTION > CCD > DF-WLVL2 (Stream reading scan)
SCAN > READER > FUNCTION > CCD > DF-WLVL3 (Original glass scan)
SCAN > READER > FUNCTION > CCD > DF-WLVL4 (Stream reading scan)
2 Technical Explanation > Original Exposure and Feed System > Control of ADF > Original Size Detection by ADF

Control of ADF

■ Original Size Detection by ADF

The size of the original set on the ADF is detected by the following two methods:
1) Initial detection of document size
2) Final detection of document size
Original length detection sensor (PS32)
Original width detection sensor (PS31)
Feeding direction
Lead sensor (PS25)
2-20
Original
F-2-33
2-20