HP DesignJet T730

Actions
1. Reboot the scanner and repeat the scan or copy. If the problem persists, repeat the scan or copy, setting
the background color removal to O or turning the original 90 degrees before scanning it again.
2. If the problem persists, clean and calibrate the scanner as indicated in Clean the scanner scanbars
on page 111 and Calibrate the scanner on page 112. If calibration ended without errors, try to scan or
copy again.
3. If the problem persists, proceed to analyze patterns A and G in the diagnostic plot, if you see some color
dierences between left and right sides of the bars for neutral and vivid colors, call HP support and
report “small color dierences between adjacent ”. Otherwise, if you see color dierences for vivid
colors but not for neutral colors, see Clipping in dark or light areas on page 157. If necessary, see also
Grain in area lls when scanning plain paper on page 153.
Vertical light lines at the intersection between scanner scanbars
This problem can be found when scanning large uniform area lls which are made of some light color. You
sometimes nd light vertical bands (around 0.5 cm wide) at the intersection between two scanbars, as in this
example. Please note the black arrow indicating the scanning direction in this example.
Actions
1. Repeat the scan or copy, rebooting the printer and setting the background color removal to O or
turning the original 90 degrees before scanning it again.
2. If the problem persists, clean and calibrate the scanner as indicated in Clean the scanner scanbars
on page 111 and Calibrate the scanner on page 112. Then proceed to analyze pattern number B of the
diagnostic plot at the intersections between scanbars. The example below shows a good result on the
left and a bad result on the right: the latter has light vertical banding 0.5 cm wide at the intersection
between two scanbars.
If you see the kind of result shown on the right, call HP support and report “vertical light bands in area
lls at the intersection between scanbars, after calibrating the scanner”.
ENWW Vertical light lines at the intersection between scanner scanbars 155