> When Images like These Are Output > When Paper with a Longer Width is Used After Copying or Printing Large Volumes of Paper with a Shorter Width, Dirty Black Bars Appear or Colors are Faint on the Left and Right Edges of Paper > Colors on the Left and Right Edges are Faint
4WK8-02F

Colors on the Left and Right Edges are Faint

The primary voltage that transfers toner to the paper does not match the specific characteristics of the paper. Adjust the primary transfer voltage.
← Feeding Direction
Remedy
To improve this situation, adjust the value for <Adj. Primary Transfer Voltage> to match the specific characteristics of the paper.
Press  → [Preferences] → [Paper Settings] → [Paper Type Management Settings] → select the type of paper you are using that is having this problem → press [Details/Edit] → [Change] for <Adj. Primary Transfer Voltage> → adjust the voltage value of black toward the minus end.
 "Paper Type Management" > "Adjusting the Primary Transfer Voltage" in the User's Guide