HP Latex 820 HP Scitex LX850 & LX820 Printers: Maintenance and troubleshoo - Page 74
The print is grainy
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4. Misregistration is very visible at the sides but not in the center. Substrate contraction/expansion or other horizontal deformation can be addressed by the Dynamic Color registration. The process is launched through the Dynamic color registration under the printer menu and prints two scales for each roll one per side (B A for first roll and D C for second roll, when dual roll is loaded, if only one roll is loaded just use B and A values) Dynamic color registration on page 16. Print-quality issues 5. Problem specific to printed black text. Check in your application or in the RIP that text color is set to pure black and does not contain other colors. The print is grainy 1. Check that you are printing on the correct side of the substrate. 2. Readjust the substrate-advance setting. 3. If the problem persists, check printhead alignment and correct it if necessary. See Align the printheads on page 9. 4. If the graininess is more visible in dark or saturated colors (coalescence): 68 Chapter 7 Troubleshoot print-quality issues ENWW