you must use OEM toner it will have kyocera logo on cartridge if you have not been using OEM toner you have to change developer or this problem will not stop
First you have to find out where the paper jam occurs. Check the Rollers and the clutches, then the sensor for the registration and finally the exit sensor. Clean or replace any defective part.
you must use OEM toner if you use aftermarket toner that says for use in you will get this problem if you have been using aftermarket toner you will have to change developer or empty all toner from developer unit and start with OEM toner Kyocera stamps their logo into cartridge
you must use OEM toner if you havent been using OEM toner you will have to either change the developer or empty all toner from developer and start with OEM toner it will have the Kyocera logo imprinted into the plastic dont use any toner that says for use in