HP DesignJet T830 User guide - Page 172
Loss of shadow or highlight details, Printer banding
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crosses that may be used to identify the problem in question. The correct pattern is shown on the left, an example of misalignment on the right. Loss of shadow or highlight details Looking at pattern H, you may find a problem with the printer or the paper. If you can distinguish lightness steps beyond the upper and lower specified thresholds, then the printer is fine. Here you can see examples of correct functioning on the left, incorrect on the right. If the printer does not pass this test, you should check that you have correctly selected the paper type and the Best quality. Printer banding Looking at patterns A, B, and C, you can see vertical banding problems. See the Horizontal lines across the image (banding) on page 137. 168 Chapter 18 The scanner diagnostic plot ENWW
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