Print quality troubleshooting
In high quality modes, graininess in ALL colors can indicate problems either with alignment or Paper Advance.
Corrective Action
In order to solve problems that result in banding, try the following:
1Check that the appropriate print quality settings are being used (refer to the User’s Guide for more information).
2Check that the loaded media is the same type as selected in the printer. You can verify the media type selected through the Front Panel (Main Menu/ Paper menu/View loaded paper).
3If the customer is using low quality paper, try recommending better quality paper (preferably HP paper). Printer performance can only be guaranteed by using recommended papers.
4Perform the Paper Advance Calibration using the same type of paper that will be used for the final print (Main Menu/Image Quality Maintenance/ Paper Advance Calibration/Calibrate Paper Advance).
If there is white point banding in only one color band and the problem cannot be fixed using the Printhead recoveries, in some cases using the force a drop detection option can fix this issue. See Force Drop Detection on page
No Printing Defects Found in the Diagnostic Print
If all the test patterns from the Diagnostic Print are correct and you still experience Image Quality problems, you can use the following procedures to resolve the problem.
Reading the Advanced diagnostic Print Results
The Advanced Diagnostic Prints
What are the Advanced Diagnostic Prints?
Advanced Diagnostic Plot. These tests provide more information of the IQ defects found in the Image Quality Service plot.
The Advanced Diagnostic Plot is divided into the following parts:
Visual Media Advanced Diagnostic. Used to check advance reliability.
Printhead Alignment Diagnostic. Used to check pen alignment reliability.
Visual Nozzle health Diagnostic. Used to check nozzle health reliability.
Force Drop Detection. Used to reset the nozzle health historic data base and force new drop detection.
HP Designjet T Series — Service Manual |