Service Manual
Page 251
...the LC Tray firmly into the printer. The rear door is fully seated (especially if printing from the tray. 4. Paper out sensors in Chapter 3. Ensure that the paper tray is open. Registration Area Jams (Sensed by PS3.) 1. Check that the cassettes are down (LJ4 and 4 Plus Only). 2. False Paper Jams... adjustment is fully seated and shows no (Sensed by PS1.) 1. PS1, PS3, or PS5 are damaged or disconnected. 3. Check that the media meets specs. (media is the sensor for the LC Tray (Tray 3), and PS7 is not too smooth or rough), and it has been stored properly. 5. ...
...the LC Tray firmly into the printer. The rear door is fully seated (especially if printing from the tray. 4. Paper out sensors in Chapter 3. Ensure that the paper tray is open. Registration Area Jams (Sensed by PS3.) 1. Check that the cassettes are down (LJ4 and 4 Plus Only). 2. False Paper Jams... adjustment is fully seated and shows no (Sensed by PS1.) 1. PS1, PS3, or PS5 are damaged or disconnected. 3. Check that the media meets specs. (media is the sensor for the LC Tray (Tray 3), and PS7 is not too smooth or rough), and it has been stored properly. 5. ...