Hello!
Did you try installing and using HPLIP with that OfficeJet 6700? HPLIP is THE utility to use for HP printer support in Linux.
According to the HPLIP website, with the exception of the photo card slots (I don't know if the 6700 even HAS them), HPLIP provides full fax, print and scan support for it...
73 DE N4RPS
Rob