HP Color LaserJet 8550 Multifunction Printer series - Manual (Page 201)

200 8 Solving Printer Problems EN
5 Lift the drum out of the printer.
6 Place the drum on a clean, smooth
surface that is free of sharp or rough
objects.
7 Face the drum surface towards you
(the handles will be away from you).
8 Center the print sample beside the
transfer drum with the top of the page
toward the transfer drum.
9 Using the print sample as a
reference, inspect the transfer drum
for a small spot or speck that might
be causing the repetitive defects.
10 To locate the spot or speck, you might
have to rotate the transfer drum by
turning the shiny metal area on either
side of the transfer drum surface with
your fingers.
CAUTION
Use extreme care when removing a
defect from the transfer drum. Using a
sharp object to remove the defect or
allowing fingernails or jewelry to touch
the transfer drum can scratch the drum,
causing permanent damage. Do not
clean the transfer drum using force. Do
not use any water-based cleaners or
excessive alcohol. These actions can
permanently damage the transfer drum.
11 Gently rub the spot or speck with a
hand wipe.