HP Color LaserJet Enterprise CP4020 HP Designjet 4020 and 4520 Printer Series - Page 128
Print the Image Diagnostics Print, Interpret Image Diagnostics part 1, Diagnostics
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Diagnostics Print the Image Diagnostics Print The Image Diagnostics Print consists of patterns designed to highlight print quality problems. It helps you to check whether you have a print quality problem, and if you have, what the cause of the problem is and how to resolve it. Before using the Image Diagnostics Print, check that you have been using appropriate print quality settings (see Choose print quality settings on page 57). To print the Image Diagnostics Print: 1. Ensure that you have paper of at least A3 size (29.7 × 42 cm = 11.7 × 16.5 in) loaded into the printer. Use the same paper type that you were using when you detected a problem. 2. Ensure that the front panel has the same print quality settings that you were using when you detected the problem (see Change the print quality on page 57). In the Image Diagnostics Print, the only difference between drawings/text and images is that the latter uses more ink in part 2, so that the colors appear darker. To print the Image Diagnostics Print will take about two minutes if you choose images; sometimes less if you choose drawings/text (depending on the paper type). 3. At the printer's front panel, select the icon, then Internal prints > Image diagnostics prints > Optim. for drawings/text or Optimize for images. When the print is ready, see Respond to the Image Diagnostics Print on page 118. Respond to the Image Diagnostics Print The Image Diagnostics Print is in three numbered parts. 1. Part 1 tests printhead alignment. See Interpret Image Diagnostics part 1 on page 118. 2. Part 2 tests printhead performance and the paper advance mechanism. See Interpret Image Diagnostics part 2 on page 119. 3. If Part 2 has revealed a printhead problem, Part 3 identifies which of the eight printheads is responsible for it. See Interpret Image Diagnostics part 3 on page 121. If Part 2 has not revealed any problem, you can and should ignore Part 3. Interpret Image Diagnostics part 1 The purpose of part 1 is to identify color-to-color alignment and bidirectional alignment problems. 118 Chapter 12 How do I... (Image Diagnostics Print topics) ENWW
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