Dust Detection Control - Canon imageRUNNER 1750 Series Service Manual

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Technical Explanation > Original Exposure and Feed System > Controls > Dust Detection Control
Related Service Mode:
• Select the following service mode to determine whether to detect the original size:
SCAN > READER > OPTION > USER > SIZE-DET
<Setting value>
0: The original size is not detected.
1: The original size is detected.
• Select the following service mode to switch between AB and inch sizes:
SCAN > READER > OPTION > BODY > SENS-CNF
<Setting value>
0: AB size
1: Inch size
• When both the original size detection sensor 1 (PS22) and the original size detection
sensor 2 (PS21) detect no original (sensor output levels do not change), select the
following service mode to change the original size to be detected:
SCAN > READER > OPTION > BODY > UNK-A5R
<Setting value>
0: Undefined size
1: A5R or STMTR
2 Technical Explanation > Original Exposure and Feed System > Controls > Dust Detection Control

■ Dust Detection Control

● Overview
In ADF mode, the machine changes the original read position or corrects the read image
depending on the presence/absence of dust on the ADF reading glass or platen guide, thus
preventing dust from showing up in the image.
The control of dust detection is as follows:
1) Dust detection preventive process
2) Dust detection correction control
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