HP Volume 23 - Manual (Page 7)

Color plane mis-registration after
installing new ITB
If a new ITB (image transfer belt) has been
installed and color plane registration problems
occur, the shipping locks may not have been
removed from the ITB. The photo below depicts
the orange shipping lock on the left side of the
ITB—there is another lock on the right side.
Left ITB shipping lock
HP Color LaserJet 3500/3700 printer updates 7