HP 8550 HP Color LaserJet 8550, 8550N, 8550DN, 8550GN, 8550MFP Printer - User - Page 202

Note 12 If the speck does not come off, dampen the hand wipe with isopropyl alcohol. Use the hand wipe to remove the spot or speck from the transfer drum. Note If you used isopropyl alcohol to clean the transfer drum, you might need to print 50 to 100 pages to clean any residual isopropyl alcohol from the transfer drum. 13 To reinstall the transfer drum, align the arrows on the ends of the drum with the matching arrows on the tracks inside the printer. 14 Push the drum into the printer. Be sure both sides are inserted completely. 15 Swing the lower (green) lever to the left, making sure it clicks into place. 16 Close the right and front doors. 17 When the printer control panel displays READY, reprint the print job to verify the repetitive defect has been eliminated. If cleaning does not eliminate the repetitive defect, contact a local authorized HP dealer or service representative for service. In certain areas of California, air pollution control regulations restrict the use of liquid Isopropyl Alcohol (IPA) as a cleaning agent. In those areas of California, please disregard the previous recommendations and use a dry, lint-free cloth. The cloth may be moistened with water if desired. EN Print Quality Problems 201