HP Designjet T3500 Production eMFP User Manual
Page 226
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).
4.
If the problem persists, clean and calibrate the scanner as indicated in
. Check that the maintenance sheet is also clean, and that it is not damaged before
calibrating the scanner (an old or damaged maintenance sheet may cause this problem); if it is
damaged, call HP support and ask for a new maintenance sheet.
5.
If the problem persists, proceed to analyze areas 11 and 12 of the diagnostic plot across modules A to
E. In the three examples below, the top example is ideal, the middle example can be regarded as
acceptable; but, if you see something similar to the bottom example (or worse), call HP support and
report “grain in area fills”.
Small color differences between adjacent CIS modules
When scanning wide plots, sometimes slightly different colors can be seen at both sides of the junction
between two CIS modules. This issue, if present, can be easily seen by analyzing patterns 9 of the diagnostic
plot at the intersection between CIS modules. Here are some examples. Please note the black arrow
indicating the scanning direction in these examples.
216 Chapter 22 Troubleshooting scan-quality issues
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