Printing card trying to print on to card instead of A4 paper but card jams, how do I adjust tensioner\springs etc. Thanks Geoff

The JAM DUPLEX message appears if you remove a sheet of paper from the face down output tray after only one side has printed.
The paper sizes you can use with the duplex printing function are A4, Letter or Legal.
If the paper adjustment lever for duplex printing is not set correctly for the paper size, paper jams may occur and the printing will be out of position on the page.


Open the back output tray.
Use both hands to slowly pull the jammed paper out of the fuser unit.

Close the back output tray.
If the paper jam cannot be cleared, go to the next step.
Pull the duplex tray and paper tray out of the printer.
Pull the jammed paper out of the printer
Put the duplex tray and paper tray back in the printer.

Click solved and vote if problem is solved. Otherwise post again

Make sure there is 1/16 to 1/32 inch space on each side of the paper in the paper tray.
Move the paper type selector back and forth 5 times, to make sure it is not stuck.
Feed the tray with a minimum of 20 sheets of paper and try to see if it loads paper through.
The paper thickness lever has two settings, one for plain paper, (thin paper 20# to 24#) and one for envelopes and thick paper.
It should be on the 0 setting for thin paper and on the + setting for thick paper and envelopes.
The paper adjustment lever may be adjusted in between the two settings to accommodate paper that is not standard or that the operating/environmental conditions have changed.
Make sure the paper is loaded far enough into the printer to ensure good contact between the paper and the paper feed mechanism.

dont use thick photo paper like 230 gsm up, instead use 180 gsm papers. but if you dont want to waste the purchased thick photo papers, you can open the back and manually insert the paper once the printing process started. i tried this as a trial & error basis until i had perfected it.... hope it works with yours.

If the paper isnt being pulled in the chances are that you have a foreign object in the paper path. First of all turn the printer off & disconnect all cables. Turn the printer upside down and give a good shake, with luck the blockage should fall out. If not then you need to be a bit brave, make sure the print carriage is parked fully to the right and out of the way. You will need an A4 (approx) sized piece of stiff cardboard such as the backing from an A4 note pad. Insert this into the paper feed locating it between the feed rollers on the R/H side. Then push quite firmly to overcome the spring pressure, when you feel it push through about a half inch stop and open the printer to see what is being pushed through. Push the card fully through and retrieve the foreign object (I have found everything from paperclips, curtain hooks and even a golf tee!). Push the card through fully and out of the printer. Always remove paper jams etc, in the direction of the paper feed whenever possible as pulling anything backwards can dislodge or break the sensor flags.
Hope this helps. Please take a moment to rate this solution, thanks.

This could be caused by several parts, the most likely is the paper eject sensor lever & spring being out of position. Get a stiff piece of A4 card such as the backing from a note pad. Make sure the print head is in the parked position (fully right). Position card in the feed hopper and push through the feed mech. Open the top and watch for the card to come through the printer. This should realign the lever and also clear any obstructions in the paper path. Always try to remove paper jams in the direction of the paper feed, pulling backwards can damage levers etc.

Please take a moment to rate this solution. Thanks.

Use The Recommended Print Area For the best printing results, adjust the top and bottom margins of your document to within the recommended printing area shown below. Click on the paper size listed for the recommended print area settings: A4 / B5 / A5 / 4 x 6 / 4 x 8 / 5 x 7 / Credit Card, Letter and Legal, Envelopes (DL / COM#10)
Caution: When printing is performed outside the recommended printing area, the top and bottom edges of the paper may curl, the print quality may deteriorate, or the printed side may be smudged.
The printer has both the recommended print area and the printable area, according to the paper size.
Recommended print area: This indicates the recommended print area.
Printable area: Although this indicates the printable area, degradation of print quality may occur.
Note:

• Set Borderless Printing to print without margins.
  
• In Duplex Printing, the printable area of the paper's header is approximately 2 mm narrower than usual.

A4 / B5 / A5 / 4 x 6 / 4 x 8 / 5 x 7 / Credit Card
Letter / Legal

Envelopes ( DL / #10 )

hi
just recently had these problems
symptoms:
LED flashing E3 code and alarm light was solid. But dissapeared when opened the coved and came back on when closed the cover.
Also the when the cover was open the inks did not slide out to the left and stayed to the right side.
There was no paper jam, but error said paper jam.

Solution:
1. I took a thick piece of paper, from like a paper folder ones, thick enough to go in the printer and not curl up when pushed..
2. turned off the printer and turned it back on.
3, while printer was turning on,and makings sound as it does normally when turning on, I pushed through the piece of paper and the rotors stoped for a millisecond.
4.the rotors started again and pushed out the paper by it self with out my force.
5. I let the printer get started. and then turned it off and then on.
6. this solved all of my problems.
this was the first problem ever with this printer in 3 years.,preety good printer.

good luck...

I just had the same problem, tried everything and resigned myself to buying a new one. I was about to throw the thing when I saw the Card backing of an A4 Pad. I thought I have nothing to lose so forced this through the machine and Bingo. It cured it. 

Set your printing job in print preview you can adjust inexact spaces in four corner of sheet of papers./ do't print w/out prvieew
it will wasting ink and papers.

I had same thing happen after a fresh Windows install. It was hard to figure out since it had been working fine until then, but luckily it is simple to fix. Open the Start Menu > Settings > Printers and Faxes folder. Then right-click on the Canon MF4100 Series printer and choose Printing Preferences. In there, change the Paper Size to Letter (instead of A4). You may also have to do this in the Print setup for whatever program you're using to print.