Vertical Repetitive Defects
If marks repeatedly appear on the printed side of the page at even intervals:
λThe toner cartridge may be damaged. The circumference of the toner cartridge drum is 94 mm (3.7 in.). If a repetitive mark occurs every 94 mm (3.7 in.) on the page, install a new HP toner cartridge.
λInternal parts may have toner on them. If the defects occur on the back of the page, the problem will likely correct itself after a few more pages.
λThe fusing assembly may be damaged. Contact an
Misformed Characters
λIf characters are improperly formed, producing hollow images, the paper stock may be too slick. Try a different paper. See “Media Specifications” on page 139.
λIf characters are improperly formed, producing a wavy effect, the laser scanner may need service. Verify that it also occurs on a demo page by pressing GO when the printer is ready. If you need service, contact an
Page Skew
λCheck the paper type and quality. See “Media Specifications” on page 139.
λMake sure the paper or other media is loaded correctly and that the guides are not too tight or too loose against the paper stack.
Curl or Wave
λCheck the paper type and quality. Both high temperature and humidity will cause paper curl. See “Media Specifications” on page 139.
λTurn over the stack of paper in the tray. Also try rotating the paper 180° in the input tray.
λOpen the rear door and try printing to the rear output bin.
EN | Chapter 4 Problem Solving 95 |