(Expanded, from previous post)
I am assuming that you mean the document feeder on the top.
Open the document handler cover (Top, left side).
There is a diagram pasted on the INSIDE COVER of the document handler cover which shows how to remove the paper feed assembly for the document handler.
It is hard to see, but it actually DOES show where everything goes, and how the paper feed assembly is removed and replaced. It takes some study.
That's how I fixed my document handler... took some time and patience.
If the printer does not feed the sheets onto which you want to copy, then first start with the User Guide. USUALLY it is a stuck torn piece of paper from a previous paper jam. Same "paper probe" trick as above is helpful to clear.
Check to see if any of the small plastic covers are loose. If so, remedy.
There is NOTHING in the UserGuide about this process.
Look also to find if any bits of paper from a previous paper jam in the paper path. You may need to raise the cover and look VERY CAREFULLY between the white strips to see if there are any bits of paper caught. A good tool is to use a strip of paper 2-3cm wide and 30cm long and push it BACKWARDS through the path that you anticipate the paper to traverse. This gentle probing helps find any stuck bits of paper.
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.