HP Color LaserJet Enterprise MFP M578 User Guide - Page 215
Table 9-12, Streak defects
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Table 9-12 Streak defects Sample Description Possible solutions Light vertical streaks that usually span the 1. length of the page. The defect displays only in areas of fill, not in text or sections with no 2. printed content. Reprint the document. Remove the cartridge, and then shake it to redistribute the toner. 3. If the issue persists, go to support.hp.com. NOTE: Both light and dark vertical streaks can occur when the printing environment is outside the specified range for temperature or humidity. Refer to your printer's environmental specifications for allowable temperature and humidity levels. Dark vertical lines which occur down the length of the page. The defect might occur anywhere on the page, in areas of fill or in sections with no printed content. On color models, these lines or streaks will also be visible on the ITB cleaning page. 1. Reprint the document. 2. Remove the cartridge, and then shake it to redistribute the toner. 3. Print a cleaning page. 4. Check the toner level in the cartridge. 5. If the issue persists, go to support.hp.com. ENWW Resolve print-quality problems 203