HP C3916A HP LaserJet 5, 5M, and 5N Printer - User's Guide - Page 119

Solving Printer 7 Problems Vertical Lines If sharp black vertical streaks appear on the page, the photosensitive drum inside the toner cartridge has probably been scratched. Replace the toner cartridge. If smeared black vertical streaks appear, the fuser may be bad. Inspect the rollers for scratches and excessive wear and, if necessary, replace the fusing assembly as described in "User-Replaceable Parts" in Chapter 8. Toner Smear If toner smears appear on the leading edge of the paper, the paper guides are dirty. Clean the printer as described in "Cleaning the Printer" in Chapter 8. If toner on the paper is loose or can be wiped off easily, your fuser may be damaged. See an HP authorized dealer or service representative. Background Gray Toner Shading If the amount of background toner shading becomes unacceptable, the procedures described below may help to clear the condition: • Increase the density setting (see "Adjusting Print Density" in Chapter 6). This will decrease the amount of background shading. • Change the paper to a lighter basis weight. • Check the printer's environment; very dry (low humidity) conditions can increase the amount of background shading. • Replace the toner cartridge. • Replace the transfer roller (see "User-Replaceable Parts" in Chapter 8). EN Solving Printer Problems 7-17