HP 3030 Service Manual - Page 237

The printed page has a gray background. Cause Solution The priority input tray is not in place. Adjust the priority input tray. The print density setting is too high. Decrease the amount of background shading by using the HP Toolbox. The lighter/darker setting is incorrect. Some "white" media might produce a greyish background at the default lighter/darker settings. Adjust the lighter/darker setting to a lighter level. The media basis-weight is too high. Change the media to a lower basis-weight. The humidity level is too low. Very low humidity can increase the amount of background shading. Move the product to a different location, or decrease the background shading by using the HP Toolbox. The print cartridge needs to be replaced. Replace the print cartridge. Vertically-aligned black streaks or smears appear on successive pages. ENWW Cause Solution The ADF glass is dirty. See, Cleaning the product. Try copying from the flatbed scanner (HP LaserJet 3020 and 3030 only). If the problem occurs only with the ADF, clean the ADF glass. See, Cleaning the product. The printer needs to be cleaned. If the problem occurs when copying from the flatbed scanner and the ADF, clean the printer. See, Cleaning the product. A component is damaged. (For example, the photosensitive drum inside the print cartridge is scratched.) 1. Replace the print cartridge if it is damaged and if maintenance procedures do not improve print quality. 2. Replace the scanner assembly. HP LaserJet 3015: see, Scanner assembly. HP LaserJet 3020 and 3030: Scanner assembly. Solving scanning (copying) image-quality problems 219