HP Color LaserJet 8550 Multifunction Printer series - Manual (Page 300)

300 Chapter 9 Maintenance and troubleshooting
EN
Cleaning the ADF feeding belt
Clean the feeding belt of the optional ADF with a damp cloth or a mild
detergent. Rotate the feeding belt by hand to clean the entire belt,
and then wipe the surface with a dry cloth.
Figure 66 Cleaning the feeding belt
Note Black streaks may appear on your original when the feed rollers are
stained. If this happens, clean the optional ADF or contact your
authorized service provider.
For more information about cleaning the optional ADF, see page 281.