How to take apart HP C4180 All-in-one

After talking to HP tech support and tring all the textbook fixes for my false paper jam,I think i have found the problem,at least mine works like new again!!!!! Take the left and right side covers off,,,,make sure your unplugged! On the right side off your ink tray is a small box with a lens on the bottom make sure that is clean..... On the left side you see a few large gears,,,on one near the center is a clear disc with numbers on it,,,,,,turn the gear closest to the corner back and forth,,,,clear plastic disc should turn also,,,,if it does not,,,gently turn it with your finger tip,, it should tighten up... Line it up so black sqare is at the bottom,,,,,slide ink tray to center position,,, restart printer,,,good luck

Hi,

i understand that you are facing a paper jam issue.
Am I correct?

ok.... open the rear access door on the printer. the door at the back side of the printer. before opening it, make sure that you unplug the power chord. you will get full access to the rollers. you have to gently pull out the jammed paper from the printer.
once that is done, you can clean the rollers using a lint free cloth. after that you can close the rear access door and try to copy.

thanks and regards
agnel