HP 3005x printer jam issue

[mhamen]

Have a 3005x with the 3rd tray add on. When trying to print from tray 2 you can hear the roller spinning 3 times than it comes up saying paper jam tray 2. If you hit the continue button the job will then print the second time. I have checked the paper path and obviously nothing there since it prints the second time. I have swapped out the 2nd tray and have actually even swapped out the printer itself with another 3005x placed on top of the third tray add on. Any suggestions on what may be causing the problem. 

[MatTheCur]

I'm having this exact same issue.

When using regular paper, there's no problem. Our finance department has to print multiple cheques (sometimes hundreds at a time), and it will "jam" every time a paper goes through.

The odd thing is that, since we've bought the printer (which has been a long while now), they've never had problems. It only started happening in the past few weeks.

Does the printer just need maintenance/cleaning? Like I said, regular paper works fine, but when printing cheques (using the type of paper that is used in folding machines), the machine will ghost jam every sheet to 4 sheets. This only started happening recently.