(Image ...I do How topics) Print Diagnostics

Here are three examples of a black rectangle in close-up, showing the fine lines of which it is made:

In the first two examples above, there are so many missing lines that the printhead may be faulty. In the third case there are only a few missing lines, which are acceptable, because the printer can compensate for such minor problems.

Corrective action

If part 3 shows a problem with one printhead, but part 2 shows no problem, there is no immediate need to take any corrective action, because the printer is able to compensate for the problem and maintain print quality. However, if part 2 also shows a problem, continue as follows:

1.Clean the printheads. See Recover (clean) the printheads.

2.If there is no improvement in print quality, replace the printhead that shows the problem. See Remove a printhead and Insert a printhead.

If I still have a problem

If the entire Image Diagnostics Print contains no defects and you still experience print quality problems, here are some things to check:

●Try using a higher print quality option. See Choose print quality settings and Change the print quality.

●Check the driver you are using to print with. If it is a non-HP driver, go to http://www.hp.com/go/ designjet/ and download the correct HP driver.

●If you are using a non-HP RIP, its settings may be incorrect. Refer to the documentation that came with the RIP.

212 Chapter 14 How do I... (Image Diagnostics Print topics)

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