Dell 5110cn Color Laser Printer - Manual (Page 318)

3.
CAUTION: Do not touch inside the printer with your hands. Some parts may be hot. Allow
time for the printer to cool before attempting to remove parts in this area.
Place the imaging drum next to the print sample on which the colored dots appear to find the part that
needs to be cleaned. 4.
NOTE: You must find the part to be cleaned yourself.
NOTE: The above graphic shows the parts, one to four, to be cleaned.
NOTE: To prevent the light-sensitive drum being overexposed, do the operation quickly.
Align the colored dots printed on the print sample with the corresponding part of the imaging drum. 5.