On 10/3/2014 5:40 AM, pierre lemercier wrote:
I just bought a HP Color LaserJet Pro M177fw;installation ok but if I
use this device to make photocopies with the document feeder I get a
black band in the middle of the output sheet. This is not the case if I
use the flatbed scanner.

Any solution?

This is a common problem with a copying machine. I believe the solution
is to clean the rollers on the feed.