Service Manual 5-9Streaks or Lines Down the PrintThere are several possible causes ofstreaks running down the length of a print.Step Question and Actions1 Check for media in the exit path.2 Clean the maintenance kit wiper blade. Inspect the operation of the maintenance kit. Ifnecessary, replace the maintenance kit.3 Inspect the printer for anything touching the drum. For example, check the exit area,under the exit frame, the preheater, the maintenance kit and the printhead, includingthe paper release blade. If necessary, clean the paper release blade.4 If streaks are on the front side of a 2-sided print, the paper preheater may be scrapingink off the print. Look for ink shaving alongside the streak. Clean the preheater usingthe front panel initiated cleaning process Remove Print Smears.5 Possible missing, weak, or discolored jet. Print the Service Test Print 1: Weak/MissingJet to determine if a jet is missing or weak. If there are discolored jets, print the solidfill test print in the color with the discolored jets. For instructions on printing solid filltest prints, see"13-19: Black, Red, Green, Blue, Cyan, Magenta, and Yellow Solid Fills"on page 5-31.6 The X-Axis Drive is not functioning correctly. If the X-Axis Drive does not move theprinthead smoothly and evenly during printing, vertical lines appear in the print. Formore information about X-Axis Drive problems, see “White Stripes (Pinstripes)” onpage 21.7 Smears on a duplex print can also be caused by the paper preheater operating at atoo high temperature. Use the diagnostics to check the paper preheater’s temperature.Replace, if necessary.0388-41
