HP (Hewlett-Packard) 9050MFP User Manual

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Correcting output quality problems 157
Correcting output quality problems
The first step in correcting output quality problems is to determine if the image defect is present 
when copying and printing, or only when copying. If the image defect is present only when 
copying, se
If the image defect is present only when printing, use the examples in the image defect table to 
determine which print quality problem you are experiencing, and then see the corresponding 
reference pages to troubleshoot the problem.
Note
The following examples depict letter-size paper that has passed through the MFP long-edge first. 
(If the paper has passed through the MFP short-edge first, lines and repeating defects will run 
vertically rather than horizontally.)