Problem | Solution |
Vertical lines | If black vertical streaks appear on the page: |
| • The drum inside the toner cartridge has probably been |
| scratched. Install a new toner cartridge. |
| If white vertical streaks appear on the page: |
| • The surface of the LSU part inside the machine may be |
| dirty. Clean the LSU. See “Cleaning the Inside” on |
| page 4.6. Contact your service representative. |
Gray background | If the amount of background shading becomes |
| unacceptable, the procedures below may fix the problem. |
| • Change to a lighter weight pages. See “Paper |
| Specifications” on page 6.3. |
| • Check the printer’s environment; very dry (low humidity) |
| or high humidity (higher than 80% RH) conditions can |
| increase the amount of background shading. |
| • Remove the old toner cartridge and install a new one. See |
| “Installing the Toner Cartridge” on page 2.4. |
Toner smear | • Clean the inside of the printer. See “Cleaning the Inside” |
| on page 4.6. |
| • Check the paper type and quality. See “Paper |
| Specifications” on page 6.3. |
| • Remove the toner cartridge and install a new one. See |
| “Installing the Toner Cartridge” on page 2.4. |
Vertical repetitive | If marks repeatedly appear on the printed side of the page |
defects | at even intervals: |
| • The toner cartridge may be damaged. Clean the inside of |
| the printer. See “Cleaning the Inside” on page 4.6. After |
| cleaning the inside of the printer, if you still have the |
| same problems, install a new toner cartridge. See |
| “Installing the Toner Cartridge” on page 2.4. |
| • Parts of the printer may have toner on them. If the defects |
| occur on the back of the page, the problem will likely |
| correct itself after a few more pages. |
| • The fusing assembly may be damaged. Contact a service |
| representative. |