Step 1 Using a blank sheet of paper, make a two‑sided copy using the ADF. Do vertical dark lines or streaks appear on prints? | Go to step 2. | Go to step 3. |
Step 2 Using a damp, soft, lint-free cloth, wipe the following areas: - ADF glass pad (A) and ADF glass (B)
- ADF glass (A) and ADF glass pad (B) in door E
Do vertical dark lines or streaks appear on prints? | Go to step 3. | The problem is solved. |
Step 3 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Depending on your operating system, specify the paper type from the Printing Preferences or Print dialog. Notes: - Make sure that the setting matches the paper loaded.
- You can also change the setting on the printer control panel. Navigate to Settings > Paper > Tray Configuration > Paper Size/Type.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Print the document.
Do vertical dark lines or streaks appear on prints? | Go to step 4. | The problem is solved. |
Step 4 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Load paper from a fresh package. Note: Paper absorbs moisture due to high humidity. Store paper in its original wrapper until you use it. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Print the document.
Do vertical dark lines or streaks appear on prints? | Go to step 5. | The problem is solved. |
Step 5 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Remove, and then insert the imaging kit. Warning—Potential Damage: Do not expose the imaging kit to direct light. Extended exposure to light can cause print quality problems. Warning—Potential Damage: Do not touch the photoconductor drum under the imaging kit. Doing so may affect the quality of future print jobs. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Print the document.
Do vertical dark lines or streaks appear on prints? | Contact customer support. | The problem is solved. |