Stylus Pro 4880 Field Repair Guide 1/17/08
Ink Discharge. Printer Component, Software Item, LCD Display, Printer Button  Page 150.
Ink Discharge.
Note: Ink Discharge allows the evacuation of the ink in the Tubes.
1. From the Adjustment Wizard for the Pro 4880, select Ink Discharge.
1. Remove the Ink Cartridges
2. Click on Run.
3. Click on Finish when completed.