HP 3380 Service Manual - Page 207

The printed page has a gray background. Cause The priority input tray is not in place. The print density setting is too high. The lighter/darker setting is incorrect. The media basis-weight is too high. The humidity level is too low. The print cartridge needs to be replaced. Solution Adjust the priority input tray. Decrease the amount of background shading by using the HP Toolbox. Adjust the lighter/darker setting to a lighter level. Change the media to a lower basis-weight. 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. Replace the print cartridge. Vertically-aligned black streaks or smears appear on successive pages. Cause The ADF glass is dirty. The printer needs to be cleaned. A component is damaged. (For example, the photosensitive drum inside the print cartridge is scratched.) Solution Try copying from the flatbed scanner. If the problem occurs only with the ADF, clean the ADF glass. See Cleaning the product. If the problem occurs when copying from the flatbed scanner and the ADF, clean the printer. See To clean the paper path. 1. Replace the print cartridge if it is damaged and if maintenance procedures do not improve print quality. 2. Replace the scanner assembly. ENWW Solving image-quality problems 191