HP LaserJet 4 Service Manual - Page 265

Image Defect Summary The quality of the printer's output is subject to the judgment of the user. This section of the manual helps you define print quality defects, and understand what factors affect print quality. The print samples shown in the following figures illustrate some print quality defects. Keep copies of print quality defects encountered in the field with an explanation of their causes for future reference. The image defects listed below are covered in the following tables. (For major assembly, connector, and switch locations, see Figures 7-11 through 7-18 later in this chapter.) • Black Pages. • Any Faint Print Condition • Faulty Registration • Vertical White Streaks. • Right-hand Image Missing. • Small Print Voids • Random Horizontal Black Lines • Repetitive Defects. • Smeared Print/Improper Fusing. • Distorted Print. • Black Pages with Horizontal White Strips. • Image Skew. • Improperly Sized Image. • Vertical Dark Streaks. • Large Print Voids. • Background Scatter. • White or Blank Pages. Troubleshooting 7-35