HP 3380 Service Manual - Page 201

Repetitive vertical defects appear on the printed page. Cause If the repetitive mark occurs at equal distance between marks, either the print cartridge or a printer roller is damaged. The internal parts have toner on them. The driver is not set for the correct media. Solution Use the defect ruler to identify the spacing. Check the appropriate component and replace if necessary. See Repetitive image-defect ruler. If the defects occur on the back of the page, the problem will probably correct itself after a few more printed pages. Otherwise, clean the printer. (See To clean the paper path.) 1. In the Paper tab of the printer driver, under Type is:, select the correct media type from the drop-down list. (This affects the current print job only.) 2. Select the correct media from the HP Toolbox. Characters are poorly formed and are producing hollow images. Cause The media is too slick. The driver is not set for the correct media. Solution Try a different media. Make sure that the media meets specifications detailed in the HP LaserJet Printer Family Print Media Guide. 1. In the Paper tab of the printer driver, under Type is:, select the correct media type from the drop-down list. (This affects the current print job only.) 2. Select the correct media through HP Toolbox. ENWW Solving image-quality problems 185