HP LaserJet Enterprise 600 Service Manual - Page 406

Table 3-36 Image defect examples (continued) Problem Image example Solution Gray background 1. Do not use paper that has already been run through the product. 2. Try using a different type of paper. 3. Print a few more pages to see if the problem corrects itself. 4. Turn over the paper in the tray. Also, try rotating the paper 180°. 5. Open the following menus: ◦ Administration ◦ General Settings ◦ Print Quality ◦ Toner Density ● Select form a range of density settings. 6. Make sure that the environmental specifications for the product are being met. 7. Clean the product paper path. 8. If the error persists, replace the laser/scanner. 9. If the error persists, replace the DC controller PCA. 10. If the error persists, replace the high-voltage power supply. Toner smear 1. Print a few more pages to see if the problem corrects itself. 2. Try using a different type of paper. 3. Make sure that the environmental specifications for the product are being met. 4. Clean the inside of the product and run a cleaning page to clean the fuser. 5. Replace the print cartridge. Loose toner Loose toner, in this context, is defined as toner that can be rubbed off the page. 1. Open the following menus: ◦ Administration ◦ General Settings ◦ Print Quality 382 Chapter 3 Solve problems ENWW