Contex IQ 2400 Series, Technical Service Manual

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Service Guide IQ / IQ Quattro
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Banding Problems
Bad/no grey balance calibration (CIS module to module match).
Image Quality Problems
Scanning originals that have folds or is crumpled on a CIS scanner is often taken as a defect on the scanner,
where it is actually a limitation of the used technology. Due to the very short distance from sensor to surface of
the original, also called “Focal Length” we also have a very short “Focus Depth” meaning, if the original is
NOT in contact with the glass plate it is very likely to be out of focus!