HP LaserJet 9040/9050 Service Manual - Page 251

Image-defect tables The printer output quality is subject to customer judgment. This section helps define print-quality defects and the factors that affect print quality. The print samples shown illustrate some print-quality defects. Keep copies of print-quality defects that you encounter in the field, and an explanation of their causes, to use for future reference. Black page White page Blank spots Wrinkles and creases Curl or wave Contamination on back Distorted image Dropout Bubbles Gray background Horizontal black lines Horizontal smudges Horizontal white lines Light, dark, or faded print Loose toner Repeating defects Page skew Toner smear Toner specks Vertical black lines Vertical dots Figure 129. Image defect examples Vertical white lines Repeating image Misformed character Image-formation troubleshooting 235