HP Designjet T3500 Production eMFP - Manual (Page 228)

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 162 . Then proceed to analyze pattern number 2 of the diagnostic plot at the intersections
between CIS modules. 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 CIS modules.
If you see the kind of result shown on the right, call HP support and report “vertical light bands in area
fills at the intersection between CIS modules, after calibrating the scanner”.
Variable line thickness or missing lines
When scanning some CAD plots at Standard 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 (High or Max if scanning, Normal or Best if copying).
You should also set background cleaning to 0, or 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 230 . 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, clean and calibrate the scanner as indicated in Scanner maintenance
on page 162 .
4. If the problem persists, see Defocus, blurring and fading colors on page 224 .
Inaccurately reproduced colors
You have to deal with several variables if you want perfect color matching between the original you are
scanning and the copy or scanned file you obtain as a result. If you find undesired colors in cases like the
example shown below (original on the left, scanned image on the right), you can follow these guidelines.
218 Chapter 22 Troubleshooting scan-quality issues ENWW