HP Color LaserJet 9500 Service Manual - Page 361
Image-formation and print-quality troubleshooting tools
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Note Note Image-formation and print-quality troubleshooting tools The following tools are helpful in solving image-formation and print-quality problems. When troubleshooting an MFP version, you must first determine if the print-quality issue is a printrelated or copy-related issue. Print-quality issues that are related to print issues typically affect copied pages also, but copy-related issues might not always appear on printed pages. If the problem appears on both copied and printed pages, use the troubleshooting procedures in this manual. If the problem appears only on copied pages, see the troubleshooting chapter in the HP Scanner/ADF Service Manual for the HP LaserJet 9000mfp/9000Lmfp/9040mfp/9050mfp/ 9500mfp (PN C8549-90955). Print-quality problems associated with the environment The printer is operating in excessively humid or dry conditions. Make sure that the printing environment is within specifications. See "Environmental specifications" on page 26 in chapter 1. Print-quality problems associated with media Many print-quality problems and media-damage problems such as excessive curl are caused by using unsupported media, by using supported media with the incorrect media-type settings, or by using unsupported media without a media-type setting. Using supported media and selecting the appropriate type setting from the control panel alleviates many of the print-quality problems that customers encounter. Before troubleshooting print-quality problems, make sure that the customer is using supported media and that they are selecting the appropriate control panel type setting for the media they are using. Also, make sure to select the matching media-type setting in the printer driver to avoid media-type mismatch errors and prompts to load different media. See "Media specifications" on page 37 in chapter 1 for more information about supported media and media selection. Reseating consumables Correct functionality of all of the consumables for the product is dependent on correct seating to provide high-voltage continuity and correct registration. Turn off the printer and reseat the consumables if you suspect high-voltage contact problems or part-registration problems. Cleaning the post charger Cleaning the post charger might eliminate some print-quality problems, particularly poor secondary transfer of black. See "Cleaning the post charger" on page 104 in chapter 4 for more information. Cleaning the fuser input Cleaning the fuser input might eliminate some print-quality problems, particularly discharge marks and other secondary transfer defects. See "Cleaning the fuser input" on page 104 in chapter 4 for more information. ENWW Chapter 7 Troubleshooting 359