HP DesignJet T730

17 Troubleshooting copy and scan quality
issues
●
Random vertical lines
●
Wrinkles or folds
●
Line discontinuities
●
Light colored area lls are missing in the scan or copy
●
Grain in area lls when scanning plain paper
●
Small color dierences between adjacent scanbars
●
Vertical light lines at the intersection between scanner scanbars
●
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
●
Vibration
●
Defocus, blurring and fading colors
●
Incorrect paper advance, skew during scanning, or horizontal wrinkles
●
Vertical black band 30 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 149