HP LaserJet 4345 Multifunction Printer series - Manual (Page 247)

An image that is shifted on the page horizontally, vertically, or both ways indicates that the
scanner is incorrectly calibrated. See
Calibrating the scanner .
Unexpected image (ADF)
If the copy does not look at all like the original document, make sure that no media is on the
flatbed glass from a previous copy job.
ENWW Correcting print-quality and copy-quality problems 233