Image quality issues by symptom Print Quality This section describes the common symptoms seen, and how to solve the issues. There is banding in the image 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. 2. Recover the printheads using the option through the Front Panel ( 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. In order to solve any of these problems, try the following: 1. Check that the appropriate print quality settings are being used. 2. Check that the loaded paper is the same type as selected in the printer. Verify this through Front Panel the option (On the Front Panel, select the icon, then View loaded paper > View paper details ). 3. If the customer is using low quality paper, try recommending better quality paper (preferable HP paper).
Printer performance can only be guaranteed by using recommended papers. 4. Check the advance with the help of the Visual Paper Advanced Diagnostic, refer to page 195. NOTE: 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 Others Diagnostics: Force Drop Detection). Image quality issues by symptom 199