HP 8550dn HP Color LaserJet 8550, 8550N, 8550DN, 8550GN, 8550MFP Printer - Use - Page 199

Cleaning the Transfer Drum Perform these procedures only when there is an unacceptable repetitive defect and the only other solution is replacing the transfer drum. Many, but not all, repetitive defects can be removed using the following procedures. Defects that appear as light spots in dark areas of print are more likely to be corrected by this procedure than dark spots in unprinted areas. If the procedures are performed incorrectly or without proper care, the transfer drum can be permanently damaged. These procedures require the following items: z A print sample showing the repetitive defect z A clean, flat surface to work on z Isopropyl alcohol z A hand wipe CAUTION You can also use a dry, clean, soft, lint-free cloth, such as cheesecloth, to clean the transfer drum. To prevent scratches on the drum, do not use any paper products, such as tissue or paper towels, to clean the drum. Make sure you have a clean work area free of sharp or rough objects that might damage the drum. To avoid damaging the drum, remove all jewelry and watches before continuing. Contact with any of these items can cause permanent damage. 198 8 Solving Printer Problems EN