User's Manual

HP Designjet T Series — Service Manual 1-26
Print quality troubleshooting
 If printing over a LAN, it is possible that the LAN is too slow to meet the
requirements of the print job.
If this is the case, the following corrective measures can be taken:
1 Do not use the computer while printing. Close applications that use a large
amount of
computer resources.
2 Convert the file PDF. Formats like PDF require less resources to print, which
may s
olve your banding problem.
Lines are Missing, Too Thin, or Too Thick
Description of problem
Shown below is an example of what you might se
e if you have this problem:
Corrective Action
1 Check that the paper type loaded corresponds to the paper type selected in
the f
ront 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
Us
er’s Guide for more information). Select the custom print quality options in
the Print dialog, and if you are using best quality and glossy paper, try
turning on the Maximum detail option. Reprint the job in case the problem
has been solved.
3 If the r
esolution of the image is greater than the printing resolution, a loss of
line qu
ality may be seen. You can find the Max. Application Resolution
option in the Windows driver dialog's Advanced tab, under Document
Options > Printer Features. Reprint the job in case the problem has been
solved.
4 C
heck the Printhead alignment status. If the status is PENDING, perform the
Pri
nthead Alignment (Main Menu/Image Quality Maintenance/Align
Printheads). After alignment reprint the job.
5 C
heck the paper advance calibration status. If the status is PENDING,
perf
orm the paper advance calibration (Main Menu/Image Quality
Maintenance/Paper Advance Calibration/Calibrate Paper Advance). After
calibration reprint the job.
6 U
se Part 3 of the Image Quality Diagnostic Print, check if there are a
sig
nificant amount of nozzles out in the color that is actually causing the
problem (if see you a problem with the Black color in the customer print, then
only check the Black printhead in the Image Quality Diagnostic Print). If
there is a significant amount of nozzles out then replace the defective
Printhead.