So, on my TR8620a, I followed your advice, “cleaning” the sensors, assumed that you meant the rear feed sensors, not really knowing where they were, with compressed air. Then, made sure the rear paper guides were not 8.5x11, fully closed the rear fee...
Number one, where are the sensors in the back feed area, and how do you clean them. I’m have NO luck fixing this. This is on Canon. I have two Canon printers, one very expensive photo printer and the TR8620a. From the comments, this probably isn’t on...
