HP DesignJet T850 DesignJet T850 Printer Series DesignJet T950 Printer SeriesU - Page 157

Streaks, Grain, The following examples show this defect, the original is on the left

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See Horizontal lines across the image (banding) on page 116 for the troubleshooting steps to follow in this case. Streaks Looking at patterns A, B, C, G and H, you may find vertical streaks if the printer's printheads are not working correctly. Replacing the printhead for the color showing the streaks may solve the problem. Example: Grain Looking at patterns A, B, and C, you may find problems in the printer's paper advance or the printheads that cause visible grain in area fills. The following examples show this defect, the original is on the left, the printed image on the right: 148 Chapter 17 The scanner diagnostic plot

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See
Horizontal lines across the image (banding)
on page
116
for the troubleshooting steps to follow in
this case.
Streaks
Looking at patterns A, B, C, G and H, you may find vertical streaks if the printer’s printheads are not
working correctly. Replacing the printhead for the color showing the streaks may solve the problem.
Example:
Grain
Looking at patterns A, B, and C, you may find problems in the printer’s paper advance or the printheads
that cause visible grain in area fills.
The following examples show this defect, the original is on the left, the printed image on the right:
148
Chapter 17
The scanner diagnostic plot