I looked in the diagram but didn`t find spring in the trigger that trips the switch to fire the tool

I have a gun that worked well until I used it once and the nail only went into the wood part way and the head stuck in the gun. I had to pry the nail out of the gun and now the gun keeps telling me that there is a nail jam. The instructions tell me to make sure that the driver is all the way down but it does not show me what the position is that it should be.

My nailer just stopped after running a nail and nothing. I opened the nailer and found a black round rubber laying inside. Actually there are 2 round rubbers screwed to the gearcase. The screw fell out of the one. Now would that make the nailer just stop?? or is something else not working?? Could it be some thing with the switch?

I have a Black and Decker BDBN1202 TYPE 1 12V NAILER that suddenly started indicting a nail jam. I hve removed all the nails and completly opened the area the nails come out. There is nothing there, no dirt, debris or nything stuck, yet it continues to indicate a nail jam. Am i missing something?

Have 1worked real well.part broke. have to buy complete gearbox at 105.00.am trying to find out where to buy new gun.