HP Designjet T2500 eMultifunction Printer series - Manual (Page 211)

23 Troubleshooting scan-quality issues
● Random vertical lines
● Wrinkles or folds
● Line discontinuities
● Grain in area fills when scanning plain paper
● Small color differences between adjacent CIS modules
● Vertical light lines at the intersection between CIS modules
● Variable line thickness or missing lines
● Inaccurately reproduced colors
● Color fringing
● Clipping in dark or light areas
● Flare in the image when scanning glossy originals
● Vertical red and green bands over white or black background
● The stop-start effect
● Vibration
● Horizontal periodical banding
● Defocus, blurring and fading colors
● Incorrect paper advance, skew during scanning, or horizontal wrinkles
● Vertical black band 20 cm wide
● The scanner damages some originals
● Completely wrong colors
● Vertical distortion
● Object replication (ghosting)
● Clipping or incorrect scale factor when down-scaling in copies and prints
● Incorrect edge detection, mostly when scanning tracing paper
● A copied or scanned image is very skewed
In this chapter the most common defects and failure modes are shown, sorted by relevance and frequency of
appearance. A defect is a common image artifact that usually appears when using any CIS scanner. These are
ENWW 201