HP DesignJet T2500 Multifunction Printer Series - User guide

Sometimes the color mismatch between adjacent modules can be enormous, showing a serious scanner
malfunction, as in the following example. If this occurs, see Completely wrong colors on page 215.
Actions
1. Repeat the scan or copy, setting the content type to Image, reducing the background cleaning to 0 or
turning the original 90 degrees before scanning it again.
2. If the problem persists, clean and calibrate the scanner as indicated in Scanner maintenance
on page 154. If calibration ended without errors, proceed to analyze again pattern number 9 and
modules A through E of the diagnostic plot.
3. After analyzing pattern 9, if you see some color differences between left and right sides of the bars for
neutral and vivid colors, call HP support and report “small color differences between adjacent CIS
modules”. Otherwise, if you see color differences for vivid colors but not for neutral colors, see Clipping
in dark or light areas on page 208. If necessary, see also Grain in area fills when scanning plain paper
on page 203.
Vertical light lines at the intersection between CIS modules
This problem can be found when scanning large uniform area fills which are made of some light color. You
sometimes find light vertical bands (around 0.5 cm wide) at the intersection between two CIS modules, as in
this example. Please note the black arrow indicating the scanning direction in this example.
ENWW Vertical light lines at the intersection between CIS modules 205