HP Designjet T1100

HP Designjet T Series — Service Manual 1-25
Print quality troubleshooting
Horizontal Lines Across the Image (Banding)
Description of problem
When you look at the image you have pr
inted, there are horizontal lines
across the image. Shown below is an example of what you might see if you
have this problem:
Corrective Action
1 Check that the paper type loaded corresponds to the paper type selected in
the
front panel and in the software. You can verify the paper type selected
through the Front Panel (Main Menu/Paper menu/View loaded paper).
2 C
heck that the appropriate print quality settings are being used (refer to the
U
ser’s Guide for more information) and reprint the image. In some cases
print quality problems can be resolved by selecting a higher print quality
level.
3 Pr
int the Service Image Diagnostics Print, and clean any printheads that
need c
leaning. Reprint the job in case the problem has been solved
.
4 Check the paper advance calibration status. If the status is PENDING,
perform the Paper Advance Calibration (Main Menu/Image Quality
Maintenance/Paper Advance Calibration/Calibrate Paper Advance).
5 A
fter calibration reprint the job.
6 Watch the printer carriage when it reaches the end of its swath. If there is an
une
xpected delay, this may cause the banding.
This delay is possibly the result of the following:
 The user is performing tasks with other applications while printing
(particularly image processing applications). These applications are
using too many computer resources, and the computer cannot effectively
process the print job.
 The file to be printed is complex, and the computer does not have the
capacity to print such complex files.