Canon imagePROGRAF iPF755 User Manual page 67

Ink Menu
Setting Item
Rep. Ink Tank
Head Cleaning A
Replace the Ink Tank at this point. Follow the instructions displayed to
complete the required procedure. (→P.685)
Printhead cleaning options. (→P.694)
Execute Head Cleaning A if printing is faint, oddly colored, or contains
foreign substances.
Description, Instructions
Control Panel
Printer Parts 51