My D110a printer sometimes does this depending on the paper thickness. Thin paper jams more than thick paper, so I suspect that the rollers are getting slick and cannot grab the paper. I will try to open my own unit and see if they can be cleaned or recondition to eliminate the problem. I will post again if I can fix it!
The paper can be removed from the rear. The roller cover is removed by puling out the cover on the left side (as seen from the rear) and slides toward the left. The paper ca n be grabbed by hand. To replace the cover, slide the two plastic pins inward toward the right until they catch, then push the cover back from the left side.
The vibrator isn't the common motor/counterweight type. It seems like a linear see-saw motor, using the magnets themselves as the moving masses.
Lorsqu'il en aura reçu, il pourra afficher un graphique de sa réputation au fil du temps.
Voici un aperçu de ce à quoi ressemble ce graphique :
Aucun point de réputation obtenu pour l'instant.