Print quality troubleshooting
Horizontal Lines Across the Image (Banding)
Description of problem
When you look at the image you have printed, there are horizontal lines across the image. Shown below is an example of what you might see if you have this problem:
Corrective Action
1Check 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).
2Check that the appropriate print quality settings are being used (refer to the User’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.
3Print the Service Image Diagnostics Print, and clean any printheads that need cleaning. Reprint the job in case the problem has been solved.
4Check 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).
5After calibration reprint the job.
6Watch the printer carriage when it reaches the end of its swath. If there is an unexpected 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.
HP Designjet T Series — Service Manual |