3. If the problem persists, see Preventive maintenance on page 529 to see how to clean the scanner, and
see Support Menus, Diagnostic Plots & Calibrations on page 181 to see how to Calibrate the scanner.
Then proceed to analyze pattern 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.
4. If you see the kind of result shown on the right, try to reseat the Scanbars and recalibrate the scanner
(see Support Menus, Diagnostic Plots & Calibrations on page 181). If it persists; try to replace the
Scanbars and sliders (all 3 scanbars need to be replaced).
Variable line thickness or missing lines
When scanning some CAD plots at low resolution, mostly when working with grayscale or black-and-white
prints that contain very thin lines, you may see a variation in line thickness, or even some missing lines, in
some places:
Actions
1. Repeat the scan or copy using a higher resolution (600 dpi). You should also set Background color
removal to O, or, for copying, set the content type to Mixed.You might also deactivate the automatic
de-skew as explained in A copied or scanned image is very skewed on page 167. In case you were
working in black-and-white mode, we recommend using grayscale instead.
2. If the problem persists, turn the original plot 90 degrees before scanning it again.
3. If the problem persists, see Preventive maintenance on page 529 to see how to clean the scanner, and
see Support Menus, Diagnostic Plots & Calibrations on page 181 to see how to Calibrate the scanner.
4. If the problem persists, see Defocus, blurring and fading colors on page 161.
Inaccurately reproduced colors
You have to deal with several variables when attempting to match colors with the original you are scanning
and the copy or scanned le you obtain as a result. If you nd undesired colors in cases like the example
shown below (original on the left, scanned image on the right), you can follow these guidelines.
ENWW Scan and copy quality troubleshooting 157
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