Loss of shadow or highlight details
Looking at pattern H, you may nd a problem with the printer or the paper. If you can distinguish lightness
steps beyond the upper and lower specied thresholds, then the printer is ne. 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 136.
Streaks
Looking at patterns A, B, C, G and H, you may nd vertical streaks as in the examples shown below, if the
printer’s printheads are not working correctly. Replacing the printhead for the color showing the streaks may
solve the problem.
170 Chapter 18 The scanner diagnostic plot ENWW
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