HP Designjet T2500 eMultifunction Printer series - Manual (Page 214)

a. 4 (from module A to E).
b. 10, at the intersection between modules.
c. 13 in modules A and E, and 14 in modules B, C, and D.
If you see any of these defects in the studied areas, call HP support and report a “line discontinuities”
error after calibration.
The four vertical thin black lines at the beginning and the end of the diagnostic plot show, approximately, the
position of the intersection between CIS modules, where this kind of error usually appears. If the error
appears outside these areas, call HP support and report “line discontinuities within a CIS module”.
Grain in area fills when scanning plain paper
When making copies of an original containing area fills, if the paper used in the printer is plain paper (for
instance, HP Universal Bond or HP Bright White Inkjet Bond), some grain may appear in the image. This error
may also appear in scanned files of originals that were printed on textured paper. The example below shows
the original image on the left and the scanned, grainy image on the right.
Actions
1. Please look at the original and check if it is dirty, has fingerprints on it or if the grain is already present
in the print. If not, then proceed to step 2.
2. Repeat the scan/copy, setting the content type to Image.
3. If the problem persists:
● If the problem appears when copying, use Best quality. We also recommend using coated or glossy
paper in order to avoid grain in copies.
● If the problem appears in a scanned file, scan at a lower resolution (Standard quality).
204 Chapter 23 Troubleshooting scan-quality issues ENWW