Canon ir 2420 shows paper jam when there isnt any

Please check the flag sensors. Maybe there is piece of paper causing an obstruction

Hi, toner leakage comes from the drum unit , maybe needs to be replaced

Copier paper jam indicators can at times be tricky. Ok so on the last paper jam did you have to Rip the paper out in little pieces?
* If so look that the little finger on the switch where the jam was didn't get broke and therefor in a jam position.
* If the switch looks good paper dust is another problem if you can blow it out with a puff air get a can of compressed air and clean out because it's an OPTICAL switch looking for light passing across when a jam happens it closes the path and a jam is indicated.
* look for pieces of torn paper in other areas that are also causing the paper jam fault.
* Make sure all doors are closed tightly and as always try turning off and on.
Now if it's pulling doubles from the tray.

** Fan Paper before putting into the tray, this does 2 things get rid of static attraction to the sheet above and also helps get rid of small dust particles that cause problems. A can of compressed air and a vacuum helps do some PM work.
* You could have dirty pickup wheels, they need to be replaced periodically but if you have been printing on pre-printed or 2 sided sheets then a simple cleaning may need to be done. One way is to put a couple of sheeting of clean white paper in the tray, Moisten (Dampen) with 99% rubbing alcohol (70% will not work), you get this usually behind the counter in a pharmacy no script needed. It won't feed the wheels will rub and by doing so they clean themselves. remove and do again till no more rub marks come off on the moistened sheet "Now Just Dampen no dripping wet! " this will help extend service calls.

Hope I helped.
Mike

Manoj, Try using compressed air to blow dust and debris out of printer. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
How to fix paper jam Canon iR3300 printer
Home Canon Italia
https://www.usa.canon.com/internet/portal/us/home/support/details/copiers-mfps-fax-machines/support-multifunction/imagerunner-3300

Doubt motor, suspect slipping paper feed roller in area just before ps24 area, or slipping clutch or obstruction in paper path. Ensure your using fresh paper, not old as it curls and causes issues. Rare is it a motor fail, especially if issue is sometimes rather than everytime. Clean clean is usally the fix or most paper path problems. Paper dust often makes rollers and feed tires slip rather than grip. Cheaper paper gives off more paper dust and causes more wear. Slightly damp rag just with water on rubber rollers is the best tool.Good Luck.

Check the photointerrupters and optical sensors

Causes for paper jams in Printers are given below:

* Dust or debris
* Rotating drum problem
* Toner or fuser complaint

Dust or debris

One of the main causes for paper jams is the presence of dirt, dust, or debris in your toner cartridge. The paper coming into the cartridge would get stuck. So clean your printer regularly. Remove the dust from the printer. Also find out whether any jams occurred in the sensor hole in the upper part of the rotating drum. Do not touch the roller while cleaning. If the oil in your body gets into the roller, the printing media cannot roll over it properly and you can't get rid of the printer problem.

Rotating drum problem

If there is no direct symptom of paper jam and still you cannot do printing properly, find whether it is because of drum problem. If the paper gets into the end gear of the rotating drum and gets stuck there, you cannot access the printing function. Switch off your printer and check the plastic arms of the printer drum. If there is any paper piece jammed in any of the arms, you can't continue printing. Here also cleaning is the best method to solve the problem. While cleaning, check the arms of the rotating drum.

Toner or fuser complaint

Toner complaint may also cause paper jams. It can be solved only by replacing it. When you switch on the loop back plug in, two flash lights appear; then it indicates paper jam. The oil spillage in toner can cause this problem. If the toner cartridge is not functioning properly, the same problem would be the result. The diodes or transistors in the fuser unit of the printer may get damaged and this can lead to fuser complaints. To solve this problem, you should replace it.

there may be dust or some small piece of paper stuck. Try blowing in air in there to see if anything gets loose/out

Henry, try blowing it all out with compressed air to clear jamb.