HP PageWide XL 4700 User Guide 1 - Page 160
To improve thin lines with low contrast at low resolution, Scanner diagnostic plot
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To clean while preserving thin lines ● Background removal: 5 ● Black enhancement: 6 ● Contrast: 1 To improve thin lines with low contrast at low resolution You can improve print quality at 200 or 300 dpi by using the following settings. Scan ● Background removal: 2 ● Black enhancement: 6 Copy ● Background removal: 2 ● Black enhancement: 6 ● Contrast: 0 Scanner diagnostic plot You can use the diagnostic plot to identify the cause of a scanning problem. Prepare the printer and the paper to print the diagnostic sheet Select a suitable paper type and size for the diagnostic plot. Turn on your printer and wait until it is functioning. Then select the paper on which the diagnostic plot is going to be printed (you can reuse the diagnostic plot any time in the future, if it is saved carefully). Ideally, the diagnostic plot should be printed on glossy paper, and you are highly recommended to do that if you use your printer mostly for scanning or copying photo originals (posters, pictures printed on glossy paper, etc). If you use your printer mostly to scan or copy matte originals, then you can use any matte white paper to print the diagnostic plot. Do not use recycled or tracing paper to print this plot. The size of the diagnostic plot is 610 × 914 mm (24 × 36 in). It can be printed on any 914 mm (36 in) landscape or 610 mm (24 in) portrait paper roll. You can also use a single sheet that is at least 610 × 914 mm (24 × 36 in). Once the correct paper is loaded, if this paper permits color calibration then we recommend color-calibrating the printer. You can print the diagnostic plot from the front panel: tap , then Scanner preferences > Scanner IQ plot. Visual check for errors while printing the diagnostic sheet Once the diagnostic plot is printed, the first step is to check that all the patterns included in it are correctly printed. 154 Chapter 8 Scanning and copying (MFP only) ENWW