Preventing the problem that causes ragged bars on the Print Quality Diagnostic report:
•Avoid leaving opened ink cartridges outside of the printer for an extended period of time.
•Wait until a new cartridge is ready to be installed before removing an old ink cartridge.
If you do not see any defects on the print quality report, then the printing system is working correctly. There is no reason to replace supplies or have the product serviced, because they are functioning properly. If you still have a print quality problem, here are some other things you can check:
•Check the paper.
•Check the print settings.
•Make sure your image has sufficient resolution.
•If the problem seems confined to a band near the edge of your printout, use the software you installed with the product or another software application to rotate the image 180 degrees. The problem might not appear on the other end of the print.
Regular white streaks in the bars
If any of the color bars show regular white streaks, follow these steps:
1.If line 36 on the Print Quality Diagnostic report reads PHA TTOE = 0, align the printer. For more information, see Align the printer.
2.If line 36 is not 0, or aligning does not help, clean the printhead. For more information, see Clean the printhead.
3.Print another Print Quality Diagnostic report. If the streaking is still there, but seems better, try another cleaning. If the streaking gets worse, contact HP - the printhead may need to be repalced.
Bar colors are not uniform
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