Troubleshooting Troubleshooting Banding Problems If banding does not occur in all the colors, then it is more than likely a Printhead problem. In this case, try the following: 1. Check that the appropriate print quality settings are being used (refer to the User’s Guide for more information). 2. Recover the printheads using the option through the Front Panel (Main Menu/Image Quality Maintenance/Clean Printheads). Reprint the Diagnostic Print or the print file and if the problem persists, replace the faulty Printhead. If banding does occur in all the colors, then it is more than likely a Paper Advance problem: ● If the bands are light, it means that the paper has advanced too much.
● If the bands are dark, it means that the paper hasn’t advanced enough. ● 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 1. Check that the appropriate print quality settings are being used (refer to the User’s Guide for more information). 2. Check that the loaded paper is the same type as selected in the printer. You can check the paper type selected through the Front Panel (Main Menu/Paper menu/View loaded paper). 3. If 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. 4. Perform 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 Drop Detection option can fix this issue. 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 ● Printhead Alignment ● Nozzle Health ● Force Drop Detection The Advanced Diagnostic Prints What are the Advanced Diagnostic Prints? These tests provide more information about the IQ defects found in the Image Quality Service plot. 12 Chapter 1 Troubleshooting ENWW