Im not sure if my telling you will help as i have taken it apart and dismantled it and found nothing to constitute a paper jam. Here is how you get the case off.
!. Remove the input paper tray drawer, behind it you will find 2 screws remove them.
2.The case connects at the bottom and the top in tracks and then snaps in place on the corners. Take a stand screw driver and slowly pop open the seems working your way around the case. (Leave the corner units in place.
3. open rear door and remove the 2 top screws.
4. you will see where the scanner unit is screwed 2 two places in the front remove those and on the left side of the case you will a motherboard. as you lift off the scanner you will need to detach a ribbon cable and two flat cables so that it will be completely disconnected.
5. the remaining scanner bed has two screws in the back which need to be removed in order to get at the printer assembly.
First see where your jam is \I made the mistake of simply wrenching it out and i think i may have disconnected or damage a sensor.
If it is in the top most fusor. them you can simply remove the top 2 screws which frees up the guides and remove the paper.
BE CARE NOT TO BREAK a very fragile plastic rod the rides above the unit.
I have done that and am a still getting the error message.
I have also done a hard reset
vacuumed and cleaned it out including the toner bays.
Tomorrow I am going to buy a star screw driver as i could get the assembly apart because on screw is a weird start sharp. That will give me access to the entire assembly where i can check the rollers and sensor, as well as clean the rollers and check the sensors.
\good luck hope this helps! Mikel