I wanted to post this solution in case you tried the solution in the roland bn20 pinch roller error video yet it didn't solve the pinch roller problem. If no matter where you move the pinch roller you are still getting the error message, then it is because print head can not read the pinch roller's position. It is either the pinch roller sensor is unclean (dust/oil/ink) or the cable connected to the sensor is damaged (in that case it will need replacement/ you will need to call in maintenance). There is a sensor at the back of the print head. To see it, first turn off the main power from the back. Then gently take the printhead to the middle. Remove the media from the back, take a flashlight and go to back of the printer to peak through the gap. You will see the back of the print head. If you look closely, you will locate two squares next to each other with a slightly different color than the rest of the plastic and two very small squares that look like there is a very tiny camera in them located at the right of the squares. They are the sensors and they need to be clean. You can use a new cleaning tool that you use to clean the head when making a manuel cleaning. Gently clean the sensors. After cleaning, put the print head back to it's resting location at the very right and turn the printer on. Hopefully your problem will be resolved. If you still having the error and you believe you cleaned the sensors, then it is very likely that there is a cable failure at the sensors. Since the print head is a moving object, those cables may get damaged in time. You will need to call in the maintenance. To change the cables, the whole print head will probably need to get dismantled. I am hoping this will help someone because when i had the problem and searched the internet, there was no resolution and I spent almost two days to resolve the problem.
