Xerox 8500DN Service Manual - Page 218

Print-Quality Troubleshooting Streaks or Lines Down the Print Troubleshooting Procedure (Continued) Step Questions and Actions Yes 4 If there are streaks on the front side only of Complete. a 2-sided print, the Preheater may be scraping ink off the print. 1. Look for ink shavings along the streaks on the printed paper. 2. Clean the Preheater using the Remove Print Smears routine. Did this correct the problem? 5 Check for weak or missing jets. Print the weak/missing jet test print, see "Weak/ Missing Jet" on page 5-34. Did this correct the problem? Complete. 6 Check for discolored jets. Print the solid fill Complete. test print, see "Black, Red, Green, Blue, Cyan, Magenta, and Yellow Solid Fills" on page 5-42. Did this correct the problem? 7 Check X-Axis drive motion. Complete. If the X-Axis drive does not move the Printhead smoothly and evenly during printing, vertical lines appear on the print. See "White Stripes (Pinstripes)" on page 5-30. Did this correct the problem? 8 Check the Preheater's temperature. Replace the Smears on a duplex print can be caused by Preheater. the preheater operating at a temperature that is too high or debris is in the Duplex Roller or duplex guides. Run the Service Diagnostics Duplex Path test. Is the operating temperature within the correct value range? No Go to Step 5. Go to Step 6. Go to Step 7. Go to Step 8. Replace the Electronics Module. 5-12 Phaser 8400/8500/8550/8560 Color Printer Service Manual