Canon imagePROGRAF iPF510 User Manual page 667

The Front Tray Guides are in the Front Paper Feed Slot.
Paper cannot be ejected because the roll was
advanced when the Front Tray Guides were in the
Front Paper Feed Slot.
Cause Corrective Action
On the Control Panel, momentarily select POP
Board on the screen for selection of the media type.
The Front Paper Feed Slot will rise, so lift the Vertical
Paper Guides and store them toward the front.
Problems Regarding Paper
Troubleshooting 653